In the Linux kernel, the following vulnerability has been resolved:net/sched: Abort __tc_modify_qdisc if parent class does not existLion s patch [1] revealed an ancient bug in the qdisc API.Whenever a user creates/modifies a qdisc specifying as a parent anotherqdisc, the qdisc API will, during grafting, detect that the user isnot trying to attach to a class and reject. However grafting isperformed after qdisc_create (and thus the qdiscs init callback) isexecuted. In qdiscs that eventually call qdisc_tree_reduce_backlogduring init or change (such as fq, hhf, choke, etc), an issuearises. For example, executing the following commands:sudo tc qdisc add dev lo root handle a: htb default 2sudo tc qdisc add dev lo parent a: handle beef fqQdiscs such as fq, hhf, choke, etc unconditionally invokeqdisc_tree_reduce_backlog() in their control path init() or change() whichthen causes a failure to find the child class; however, that does not stopthe unconditional invocation of the assumed child qdisc s qlen_notify witha null class. All these qdiscs make the assumption that class is non-null.The solution is ensure that qdisc_leaf() which looks up the parentclass, and is invoked prior to qdisc_create(), should return failure onnot finding the class.In this patch, we leverage qdisc_leaf to return ERR_PTRs whenever theparentid doesn t correspond to a class, so that we can detect itearlier on and abort before qdisc_create is called.[1] https://lore.kernel.org/netdev/d912cbd7-193b-4269-9857-525bee8bbb6a@gmail.com/
In the Linux kernel, the following vulnerability has been resolved:net/sched: Abort __tc_modify_qdisc if parent class does not existLion s patch [1] revealed an ancient bug in the qdisc API.Whenever a user creates/modifies a qdisc specifying as a parent anotherqdisc, the qdisc API will, during grafting, detect that the user isnot trying to attach to a class and reject. However grafting isperformed after qdisc_create (and thus the qdiscs init callback) isexecuted. In qdiscs that eventually call qdisc_tree_reduce_backlogduring init or change (such as fq, hhf, choke, etc), an issuearises. For example, executing the following commands:sudo tc qdisc add dev lo root handle a: htb default 2sudo tc qdisc add dev lo parent a: handle beef fqQdiscs such as fq, hhf, choke, etc unconditionally invokeqdisc_tree_reduce_backlog() in their control path init() or change() whichthen causes a failure to find the child class; however, that does not stopthe unconditional invocation of the assumed child qdisc s qlen_notify witha null class. All these qdiscs make the assumption that class is non-null.The solution is ensure that qdisc_leaf() which looks up the parentclass, and is invoked prior to qdisc_create(), should return failure onnot finding the class.In this patch, we leverage qdisc_leaf to return ERR_PTRs whenever theparentid doesn t correspond to a class, so that we can detect itearlier on and abort before qdisc_create is called.[1] https://lore.kernel.org/netdev/d912cbd7-193b-4269-9857-525bee8bbb6a@gmail.com/
In the Linux kernel, the following vulnerability has been resolved:net/sched: Abort __tc_modify_qdisc if parent class does not existLion s patch [1] revealed an ancient bug in the qdisc API.Whenever a user creates/modifies a qdisc specifying as a parent anotherqdisc, the qdisc API will, during grafting, detect that the user isnot trying to attach to a class and reject. However grafting isperformed after qdisc_create (and thus the qdiscs init callback) isexecuted. In qdiscs that eventually call qdisc_tree_reduce_backlogduring init or change (such as fq, hhf, choke, etc), an issuearises. For example, executing the following commands:sudo tc qdisc add dev lo root handle a: htb default 2sudo tc qdisc add dev lo parent a: handle beef fqQdiscs such as fq, hhf, choke, etc unconditionally invokeqdisc_tree_reduce_backlog() in their control path init() or change() whichthen causes a failure to find the child class; however, that does not stopthe unconditional invocation of the assumed child qdisc s qlen_notify witha null class. All these qdiscs make the assumption that class is non-null.The solution is ensure that qdisc_leaf() which looks up the parentclass, and is invoked prior to qdisc_create(), should return failure onnot finding the class.In this patch, we leverage qdisc_leaf to return ERR_PTRs whenever theparentid doesn t correspond to a class, so that we can detect itearlier on and abort before qdisc_create is called.[1] https://lore.kernel.org/netdev/d912cbd7-193b-4269-9857-525bee8bbb6a@gmail.com/
In the Linux kernel, the following vulnerability has been resolved:net/sched: Abort __tc_modify_qdisc if parent class does not existLion s patch [1] revealed an ancient bug in the qdisc API.Whenever a user creates/modifies a qdisc specifying as a parent anotherqdisc, the qdisc API will, during grafting, detect that the user isnot trying to attach to a class and reject. However grafting isperformed after qdisc_create (and thus the qdiscs init callback) isexecuted. In qdiscs that eventually call qdisc_tree_reduce_backlogduring init or change (such as fq, hhf, choke, etc), an issuearises. For example, executing the following commands:sudo tc qdisc add dev lo root handle a: htb default 2sudo tc qdisc add dev lo parent a: handle beef fqQdiscs such as fq, hhf, choke, etc unconditionally invokeqdisc_tree_reduce_backlog() in their control path init() or change() whichthen causes a failure to find the child class; however, that does not stopthe unconditional invocation of the assumed child qdisc s qlen_notify witha null class. All these qdiscs make the assumption that class is non-null.The solution is ensure that qdisc_leaf() which looks up the parentclass, and is invoked prior to qdisc_create(), should return failure onnot finding the class.In this patch, we leverage qdisc_leaf to return ERR_PTRs whenever theparentid doesn t correspond to a class, so that we can detect itearlier on and abort before qdisc_create is called.[1] https://lore.kernel.org/netdev/d912cbd7-193b-4269-9857-525bee8bbb6a@gmail.com/
In the Linux kernel, the following vulnerability has been resolved:net/sched: Abort __tc_modify_qdisc if parent class does not existLion s patch [1] revealed an ancient bug in the qdisc API.Whenever a user creates/modifies a qdisc specifying as a parent anotherqdisc, the qdisc API will, during grafting, detect that the user isnot trying to attach to a class and reject. However grafting isperformed after qdisc_create (and thus the qdiscs init callback) isexecuted. In qdiscs that eventually call qdisc_tree_reduce_backlogduring init or change (such as fq, hhf, choke, etc), an issuearises. For example, executing the following commands:sudo tc qdisc add dev lo root handle a: htb default 2sudo tc qdisc add dev lo parent a: handle beef fqQdiscs such as fq, hhf, choke, etc unconditionally invokeqdisc_tree_reduce_backlog() in their control path init() or change() whichthen causes a failure to find the child class; however, that does not stopthe unconditional invocation of the assumed child qdisc s qlen_notify witha null class. All these qdiscs make the assumption that class is non-null.The solution is ensure that qdisc_leaf() which looks up the parentclass, and is invoked prior to qdisc_create(), should return failure onnot finding the class.In this patch, we leverage qdisc_leaf to return ERR_PTRs whenever theparentid doesn t correspond to a class, so that we can detect itearlier on and abort before qdisc_create is called.[1] https://lore.kernel.org/netdev/d912cbd7-193b-4269-9857-525bee8bbb6a@gmail.com/
In the Linux kernel, the following vulnerability has been resolved:net/sched: Abort __tc_modify_qdisc if parent class does not existLion s patch [1] revealed an ancient bug in the qdisc API.Whenever a user creates/modifies a qdisc specifying as a parent anotherqdisc, the qdisc API will, during grafting, detect that the user isnot trying to attach to a class and reject. However grafting isperformed after qdisc_create (and thus the qdiscs init callback) isexecuted. In qdiscs that eventually call qdisc_tree_reduce_backlogduring init or change (such as fq, hhf, choke, etc), an issuearises. For example, executing the following commands:sudo tc qdisc add dev lo root handle a: htb default 2sudo tc qdisc add dev lo parent a: handle beef fqQdiscs such as fq, hhf, choke, etc unconditionally invokeqdisc_tree_reduce_backlog() in their control path init() or change() whichthen causes a failure to find the child class; however, that does not stopthe unconditional invocation of the assumed child qdisc s qlen_notify witha null class. All these qdiscs make the assumption that class is non-null.The solution is ensure that qdisc_leaf() which looks up the parentclass, and is invoked prior to qdisc_create(), should return failure onnot finding the class.In this patch, we leverage qdisc_leaf to return ERR_PTRs whenever theparentid doesn t correspond to a class, so that we can detect itearlier on and abort before qdisc_create is called.[1] https://lore.kernel.org/netdev/
In the Linux kernel, the following vulnerability has been resolved:net/sched: Abort __tc_modify_qdisc if parent class does not existLion s patch [1] revealed an ancient bug in the qdisc API.Whenever a user creates/modifies a qdisc specifying as a parent anotherqdisc, the qdisc API will, during grafting, detect that the user isnot trying to attach to a class and reject. However grafting isperformed after qdisc_create (and thus the qdiscs init callback) isexecuted. In qdiscs that eventually call qdisc_tree_reduce_backlogduring init or change (such as fq, hhf, choke, etc), an issuearises. For example, executing the following commands:sudo tc qdisc add dev lo root handle a: htb default 2sudo tc qdisc add dev lo parent a: handle beef fqQdiscs such as fq, hhf, choke, etc unconditionally invokeqdisc_tree_reduce_backlog() in their control path init() or change() whichthen causes a failure to find the child class; however, that does not stopthe unconditional invocation of the assumed child qdisc s qlen_notify witha null class. All these qdiscs make the assumption that class is non-null.The solution is ensure that qdisc_leaf() which looks up the parentclass, and is invoked prior to qdisc_create(), should return failure onnot finding the class.In this patch, we leverage qdisc_leaf to return ERR_PTRs whenever theparentid doesn t correspond to a class, so that we can detect itearlier on and abort before qdisc_create is called.[1] https://lore.kernel.org/netdev/
In the Linux kernel, the following vulnerability has been resolved:net/sched: Abort __tc_modify_qdisc if parent class does not existLion s patch [1] revealed an ancient bug in the qdisc API.Whenever a user creates/modifies a qdisc specifying as a parent anotherqdisc, the qdisc API will, during grafting, detect that the user isnot trying to attach to a class and reject. However grafting isperformed after qdisc_create (and thus the qdiscs init callback) isexecuted. In qdiscs that eventually call qdisc_tree_reduce_backlogduring init or change (such as fq, hhf, choke, etc), an issuearises. For example, executing the following commands:sudo tc qdisc add dev lo root handle a: htb default 2sudo tc qdisc add dev lo parent a: handle beef fqQdiscs such as fq, hhf, choke, etc unconditionally invokeqdisc_tree_reduce_backlog() in their control path init() or change() whichthen causes a failure to find the child class; however, that does not stopthe unconditional invocation of the assumed child qdisc s qlen_notify witha null class. All these qdiscs make the assumption that class is non-null.The solution is ensure that qdisc_leaf() which looks up the parentclass, and is invoked prior to qdisc_create(), should return failure onnot finding the class.In this patch, we leverage qdisc_leaf to return ERR_PTRs whenever theparentid doesn t correspond to a class, so that we can detect itearlier on and abort before qdisc_create is called.[1] https://lore.kernel.org/netdev/d912cbd7-193b-4269-9857-525bee8bbb6a@gmail.com/
In the Linux kernel, the following vulnerability has been resolved:net/sched: Abort __tc_modify_qdisc if parent class does not existLion s patch [1] revealed an ancient bug in the qdisc API.Whenever a user creates/modifies a qdisc specifying as a parent anotherqdisc, the qdisc API will, during grafting, detect that the user isnot trying to attach to a class and reject. However grafting isperformed after qdisc_create (and thus the qdiscs init callback) isexecuted. In qdiscs that eventually call qdisc_tree_reduce_backlogduring init or change (such as fq, hhf, choke, etc), an issuearises. For example, executing the following commands:sudo tc qdisc add dev lo root handle a: htb default 2sudo tc qdisc add dev lo parent a: handle beef fqQdiscs such as fq, hhf, choke, etc unconditionally invokeqdisc_tree_reduce_backlog() in their control path init() or change() whichthen causes a failure to find the child class; however, that does not stopthe unconditional invocation of the assumed child qdisc s qlen_notify witha null class. All these qdiscs make the assumption that class is non-null.The solution is ensure that qdisc_leaf() which looks up the parentclass, and is invoked prior to qdisc_create(), should return failure onnot finding the class.In this patch, we leverage qdisc_leaf to return ERR_PTRs whenever theparentid doesn t correspond to a class, so that we can detect itearlier on and abort before qdisc_create is called.[1] https://lore.kernel.org/netdev/d912cbd7-193b-4269-9857-525bee8bbb6a@gmail.com/
In the Linux kernel, the following vulnerability has been resolved:net/sched: Abort __tc_modify_qdisc if parent class does not existLion s patch [1] revealed an ancient bug in the qdisc API.Whenever a user creates/modifies a qdisc specifying as a parent anotherqdisc, the qdisc API will, during grafting, detect that the user isnot trying to attach to a class and reject. However grafting isperformed after qdisc_create (and thus the qdiscs init callback) isexecuted. In qdiscs that eventually call qdisc_tree_reduce_backlogduring init or change (such as fq, hhf, choke, etc), an issuearises. For example, executing the following commands:sudo tc qdisc add dev lo root handle a: htb default 2sudo tc qdisc add dev lo parent a: handle beef fqQdiscs such as fq, hhf, choke, etc unconditionally invokeqdisc_tree_reduce_backlog() in their control path init() or change() whichthen causes a failure to find the child class; however, that does not stopthe unconditional invocation of the assumed child qdisc s qlen_notify witha null class. All these qdiscs make the assumption that class is non-null.The solution is ensure that qdisc_leaf() which looks up the parentclass, and is invoked prior to qdisc_create(), should return failure onnot finding the class.In this patch, we leverage qdisc_leaf to return ERR_PTRs whenever theparentid doesn t correspond to a class, so that we can detect itearlier on and abort before qdisc_create is called.[1] https://lore.kernel.org/netdev/d912cbd7-193b-4269-9857-525bee8bbb6a@gmail.com/
In the Linux kernel, the following vulnerability has beenresolved:net/sched:Abort __tc_modify_qdisc if parent class does not existLion s patch [1] revealed an ancient bug in the qdiscAPI.Whenever a usercreates/modifies a qdisc specifying as a parent anotherqdisc, the qdisc APIwill, during grafting, detect that theuser isnot trying to attach to a class and reject. However grafting isperformed after qdisc_create (and thus the qdiscs init callback) isexecuted. In qdiscs that eventually call qdisc_tree_reduce_backlogduring init or change (such as fq, hhf, choke, etc), an issuearises. For example, executing the following commands:sudo tc qdisc add dev lo roothandle a: htbdefault 2sudotc qdisc add dev lo parent a: handle beeffqQdiscs suchas fq, hhf, choke, etc unconditionally invokeqdisc_tree_reduce_backlog() in their control path init() or change() whichthen causes a failure to find the child class; however, that does not stopthe unconditional invocation of the assumed child qdisc s qlen_notify witha null class. All these qdiscs make the assumption that class is non-null.The solution is ensure that qdisc_leaf() which looks up the parentclass, and is invoked prior to qdisc_create(), should return failure onnot finding the class.In this patch, we leverage qdisc_leaf to return ERR_PTRs whenever theparentid doesn t correspond to a class, so that we can detect itearlier on and abort before qdisc_create is called.[1] https://lore.kernel.org/netdev/d912cbd7-193b-4269-9857-525bee8bbb6a@gmail.com/
A vulnerability, which was classified as problematic, hasbeen found in LinuxKernel up to 6.16-rc5 (Operating System).Impacted is confidentiality, integrity, and availability.Upgradingto version 5.4.296,5.10.240, 5.15.189, 6.1.146, 6.6.99, 6.12.39, 6.15.7 or 6.16-rc6 eliminatesthis vulnerability. Applying the patch923a276c74e25073ae391e930792ac86a9f77f1e/90436e72c9622c2f70389070088325a3232d339f/25452638f133ac19d75af3f928327d8016952c8e/23c165dde88eac405eebb59051ea1fe139a45803/4c691d1b6b6dbd73f30ed9ee7da05f037b0c49af/8ecd651ef24ab50123692a4e3e25db93cb11602a/e28a383d6485c3bb51dc5953552f76c4dea33eea/ffdde7bf5a439aaa1955ebd581f5c64ab1533963 is able to eliminatethis problem.The bugfix isready for download at git.kernel.org. Thebest possiblemitigation is suggested to be upgrading to the latest version.
A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 6.16-rc5 (Operating System).Impacted is confidentiality, integrity, and availability.Upgrading to version 5.4.296, 5.10.240, 5.15.189, 6.1.146, 6.6.99, 6.12.39, 6.15.7 or 6.16-rc6 eliminates this vulnerability. Applying the patch 923a276c74e25073ae391e930792ac86a9f77f1e/90436e72c9622c2f70389070088325a3232d339f/25452638f133ac19d75af3f928327d8016952c8e/23c165dde88eac405eebb59051ea1fe139a45803/4c691d1b6b6dbd73f30ed9ee7da05f037b0c49af/8ecd651ef24ab50123692a4e3e25db93cb11602a/e28a383d6485c3bb51dc5953552f76c4dea33eea/ffdde7bf5a439aaa1955ebd581f5c64ab1533963 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.
A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 6.16-rc5 (Operating System).Impacted is confidentiality, integrity, and availability.Upgrading to version 5.4.296, 5.10.240, 5.15.189, 6.1.146, 6.6.99, 6.12.39, 6.15.7 or 6.16-rc6 eliminates this vulnerability. Applying the patch 923a276c74e25073ae391e930792ac86a9f77f1e/90436e72c9622c2f70389070088325a3232d339f/25452638f133ac19d75af3f928327d8016952c8e/23c165dde88eac405eebb59051ea1fe139a45803/4c691d1b6b6dbd73f30ed9ee7da05f037b0c49af/8ecd651ef24ab50123692a4e3e25db93cb11602a/e28a383d6485c3bb51dc5953552f76c4dea33eea/ffdde7bf5a439aaa1955ebd581f5c64ab1533963 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.
A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 6.16-rc5 (Operating System).Impacted is confidentiality, integrity, and availability.Upgrading to version 5.4.296, 5.10.240, 5.15.189, 6.1.146, 6.6.99, 6.12.39, 6.15.7 or 6.16-rc6 eliminates this vulnerability. Applying the patch 923a276c74e25073ae391e930792ac86a9f77f1e/90436e72c9622c2f70389070088325a3232d339f/25452638f133ac19d75af3f928327d8016952c8e/23c165dde88eac405eebb59051ea1fe139a45803/4c691d1b6b6dbd73f30ed9ee7da05f037b0c49af/8ecd651ef24ab50123692a4e3e25db93cb11602a/e28a383d6485c3bb51dc5953552f76c4dea33eea/ffdde7bf5a439aaa1955ebd581f5c64ab1533963 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.
A vulnerability, which was classified as problematic, has been found in Linux Kernel up to 6.16-rc5 (Operating System).Impacted is confidentiality, integrity, and availability.Upgrading to version 5.4.296, 5.10.240, 5.15.189, 6.1.146, 6.6.99, 6.12.39, 6.15.7 or 6.16-rc6 eliminates this vulnerability. Applying the patch 923a276c74e25073ae391e930792ac86a9f77f1e/90436e72c9622c2f70389070088325a3232d339f/25452638f133ac19d75af3f928327d8016952c8e/23c165dde88eac405eebb59051ea1fe139a45803/4c691d1b6b6dbd73f30ed9ee7da05f037b0c49af/8ecd651ef24ab50123692a4e3e25db93cb11602a/e28a383d6485c3bb51dc5953552f76c4dea33eea/ffdde7bf5a439aaa1955ebd581f5c64ab1533963 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.
A vulnerability, which was classified as problematic, hasbeen found in LinuxKernel up to 6.16-rc5 (Operating System).Impacted is confidentiality, integrity, and availability.Upgradingto version 5.4.296,5.10.240, 5.15.189, 6.1.146, 6.6.99, 6.12.39, 6.15.7 or 6.16-rc6 eliminatesthis vulnerability. Applying the patch923a276c74e25073ae391e930792ac86a9f77f1e/90436e72c9622c2f70389070088325a3232d339f/25452638f133ac19d75af3f928327d8016952c8e/23c165dde88eac405eebb59051ea1fe139a45803/4c691d1b6b6dbd73f30ed9ee7da05f037b0c49af/8ecd651ef24ab50123692a4e3e25db93cb11602a/e28a383d6485c3bb51dc5953552f76c4dea33eea/ffdde7bf5a439aaa1955ebd581f5c64ab1533963 is able to eliminatethis problem.The bugfix isready for download at git.kernel.org. Thebest possiblemitigation is suggested to be upgrading to the latest version.
In the Linux kernel, the following vulnerability has beenresolved:net/sched:Abort __tc_modify_qdisc if parent class does not existLion s patch [1] revealed an ancient bug in the qdiscAPI.Whenever a usercreates/modifies a qdisc specifying as a parent anotherqdisc, the qdisc APIwill, during grafting, detect that theuser isnot trying to attach to a class and reject. However grafting isperformed after qdisc_create (and thus the qdiscs init callback) isexecuted. In qdiscs that eventually call qdisc_tree_reduce_backlogduring init or change (such as fq, hhf, choke, etc), an issuearises. For example, executing the following commands:sudo tc qdisc add dev lo roothandle a: htbdefault 2sudotc qdisc add dev lo parent a: handle beeffqQdiscs suchas fq, hhf, choke, etc unconditionally invokeqdisc_tree_reduce_backlog() in their control path init() or change() whichthen causes a failure to find the child class; however, that does not stopthe unconditional invocation of the assumed child qdisc s qlen_notify witha null class. All these qdiscs make the assumption that class is non-null.The solution is ensure that qdisc_leaf() which looks up the parentclass, and is invoked prior to qdisc_create(), should return failure onnot finding the class.In this patch, we leverage qdisc_leaf to return ERR_PTRs whenever theparentid doesn t correspond to a class, so that we can detect itearlier on and abort before qdisc_create is called.[1] https://lore.kernel.org/netdev/
In the Linux kernel, the following vulnerability has beenresolved:net/sched:Abort __tc_modify_qdisc if parent class does not existLion s patch [1] revealed an ancient bug in the qdiscAPI.Whenever a usercreates/modifies a qdisc specifying as a parent anotherqdisc, the qdisc APIwill, during grafting, detect that theuser isnot trying to attach to a class and reject. However grafting isperformed after qdisc_create (and thus the qdiscs init callback) isexecuted. In qdiscs that eventually call qdisc_tree_reduce_backlogduring init or change (such as fq, hhf, choke, etc), an issuearises. For example, executing the following commands:sudo tc qdisc add dev lo roothandle a: htbdefault 2sudotc qdisc add dev lo parent a: handle beeffqQdiscs suchas fq, hhf, choke, etc unconditionally invokeqdisc_tree_reduce_backlog() in their control path init() or change() whichthen causes a failure to find the child class; however, that does not stopthe unconditional invocation of the assumed child qdisc s qlen_notify witha null class. All these qdiscs make the assumption that class is non-null.The solution is ensure that qdisc_leaf() which looks up the parentclass, and is invoked prior to qdisc_create(), should return failure onnot finding the class.In this patch, we leverage qdisc_leaf to return ERR_PTRs whenever theparentid doesn t correspond to a class, so that we can detect itearlier on and abort before qdisc_create is called.[1] https://lore.kernel.org/netdev/
A vulnerability, which was classified as problematic, hasbeen found in LinuxKernel up to 6.16-rc5 (Operating System).Impacted is confidentiality, integrity, and availability.Upgradingto version 5.4.296,5.10.240, 5.15.189, 6.1.146, 6.6.99, 6.12.39, 6.15.7 or 6.16-rc6 eliminatesthis vulnerability. Applying the patch923a276c74e25073ae391e930792ac86a9f77f1e/90436e72c9622c2f70389070088325a3232d339f/25452638f133ac19d75af3f928327d8016952c8e/23c165dde88eac405eebb59051ea1fe139a45803/4c691d1b6b6dbd73f30ed9ee7da05f037b0c49af/8ecd651ef24ab50123692a4e3e25db93cb11602a/e28a383d6485c3bb51dc5953552f76c4dea33eea/ffdde7bf5a439aaa1955ebd581f5c64ab1533963 is able to eliminatethis problem.The bugfix isready for download at git.kernel.org. Thebest possiblemitigation is suggested to be upgrading to the latest version.
A vulnerability, which was classified as problematic, hasbeen found in LinuxKernel up to 6.16-rc5 (Operating System).Impacted is confidentiality, integrity, and availability.Upgradingto version 5.4.296,5.10.240, 5.15.189, 6.1.146, 6.6.99, 6.12.39, 6.15.7 or 6.16-rc6 eliminatesthis vulnerability. Applying the patch923a276c74e25073ae391e930792ac86a9f77f1e/90436e72c9622c2f70389070088325a3232d339f/25452638f133ac19d75af3f928327d8016952c8e/23c165dde88eac405eebb59051ea1fe139a45803/4c691d1b6b6dbd73f30ed9ee7da05f037b0c49af/8ecd651ef24ab50123692a4e3e25db93cb11602a/e28a383d6485c3bb51dc5953552f76c4dea33eea/ffdde7bf5a439aaa1955ebd581f5c64ab1533963 is able to eliminatethis problem.The bugfix isready for download at git.kernel.org. Thebest possiblemitigation is suggested to be upgrading to the latest version.
In the Linux kernel, the following vulnerability has beenresolved:net/sched:Abort __tc_modify_qdisc if parent class does not existLion s patch [1] revealed an ancient bug in the qdiscAPI.Whenever a usercreates/modifies a qdisc specifying as a parent anotherqdisc, the qdisc APIwill, during grafting, detect that theuser isnot trying to attach to a class and reject. However grafting isperformed after qdisc_create (and thus the qdiscs init callback) isexecuted. In qdiscs that eventually call qdisc_tree_reduce_backlogduring init or change (such as fq, hhf, choke, etc), an issuearises. For example, executing the following commands:sudo tc qdisc add dev lo roothandle a: htbdefault 2sudotc qdisc add dev lo parent a: handle beeffqQdiscs suchas fq, hhf, choke, etc unconditionally invokeqdisc_tree_reduce_backlog() in their control path init() or change() whichthen causes a failure to find the child class; however, that does not stopthe unconditional invocation of the assumed child qdisc s qlen_notify witha null class. All these qdiscs make the assumption that class is non-null.The solution is ensure that qdisc_leaf() which looks up the parentclass, and is invoked prior to qdisc_create(), should return failure onnot finding the class.In this patch, we leverage qdisc_leaf to return ERR_PTRs whenever theparentid doesn t correspond to a class, so that we can detect itearlier on and abort before qdisc_create is called.[1] https://lore.kernel.org/netdev/
In the Linux kernel, the following vulnerability has beenresolved:net/sched:Abort __tc_modify_qdisc if parent class does not existLion s patch [1] revealed an ancient bug in the qdiscAPI.Whenever a usercreates/modifies a qdisc specifying as a parent anotherqdisc, the qdisc APIwill, during grafting, detect that theuser isnot trying to attach to a class and reject. However grafting isperformed after qdisc_create (and thus the qdiscs init callback) isexecuted. In qdiscs that eventually call qdisc_tree_reduce_backlogduring init or change (such as fq, hhf, choke, etc), an issuearises. For example, executing the following commands:sudo tc qdisc add dev lo roothandle a: htbdefault 2sudotc qdisc add dev lo parent a: handle beeffqQdiscs suchas fq, hhf, choke, etc unconditionally invokeqdisc_tree_reduce_backlog() in their control path init() or change() whichthen causes a failure to find the child class; however, that does not stopthe unconditional invocation of the assumed child qdisc s qlen_notify witha null class. All these qdiscs make the assumption that class is non-null.The solution is ensure that qdisc_leaf() which looks up the parentclass, and is invoked prior to qdisc_create(), should return failure onnot finding the class.In this patch, we leverage qdisc_leaf to return ERR_PTRs whenever theparentid doesn t correspond to a class, so that we can detect itearlier on and abort before qdisc_create is called.[1] https://lore.kernel.org/netdev/
A vulnerability, which was classified as problematic, hasbeen found in LinuxKernel up to 6.16-rc5 (Operating System).Impacted is confidentiality, integrity, and availability.Upgradingto version 5.4.296,5.10.240, 5.15.189, 6.1.146, 6.6.99, 6.12.39, 6.15.7 or 6.16-rc6 eliminatesthis vulnerability. Applying the patch923a276c74e25073ae391e930792ac86a9f77f1e/90436e72c9622c2f70389070088325a3232d339f/25452638f133ac19d75af3f928327d8016952c8e/23c165dde88eac405eebb59051ea1fe139a45803/4c691d1b6b6dbd73f30ed9ee7da05f037b0c49af/8ecd651ef24ab50123692a4e3e25db93cb11602a/e28a383d6485c3bb51dc5953552f76c4dea33eea/ffdde7bf5a439aaa1955ebd581f5c64ab1533963 is able to eliminatethis problem.The bugfix isready for download at git.kernel.org. Thebest possiblemitigation is suggested to be upgrading to the latest version.
A vulnerability, which was classified as problematic, hasbeen found in LinuxKernel up to 6.16-rc5 (Operating System).Impacted is confidentiality, integrity, and availability.Upgradingto version 5.4.296,5.10.240, 5.15.189, 6.1.146, 6.6.99, 6.12.39, 6.15.7 or 6.16-rc6 eliminatesthis vulnerability. Applying the patch923a276c74e25073ae391e930792ac86a9f77f1e/90436e72c9622c2f70389070088325a3232d339f/25452638f133ac19d75af3f928327d8016952c8e/23c165dde88eac405eebb59051ea1fe139a45803/4c691d1b6b6dbd73f30ed9ee7da05f037b0c49af/8ecd651ef24ab50123692a4e3e25db93cb11602a/e28a383d6485c3bb51dc5953552f76c4dea33eea/ffdde7bf5a439aaa1955ebd581f5c64ab1533963 is able to eliminatethis problem.The bugfix isready for download at git.kernel.org. Thebest possiblemitigation is suggested to be upgrading to the latest version.
In the Linux kernel, the following vulnerability has beenresolved:net/sched:Abort __tc_modify_qdisc if parent class does not existLion s patch [1] revealed an ancient bug in the qdiscAPI.Whenever a usercreates/modifies a qdisc specifying as a parent anotherqdisc, the qdisc APIwill, during grafting, detect that theuser isnot trying to attach to a class and reject. However grafting isperformed after qdisc_create (and thus the qdiscs init callback) isexecuted. In qdiscs that eventually call qdisc_tree_reduce_backlogduring init or change (such as fq, hhf, choke, etc), an issuearises. For example, executing the following commands:sudo tc qdisc add dev lo roothandle a: htbdefault 2sudotc qdisc add dev lo parent a: handle beeffqQdiscs suchas fq, hhf, choke, etc unconditionally invokeqdisc_tree_reduce_backlog() in their control path init() or change() whichthen causes a failure to find the child class; however, that does not stopthe unconditional invocation of the assumed child qdisc s qlen_notify witha null class. All these qdiscs make the assumption that class is non-null.The solution is ensure that qdisc_leaf() which looks up the parentclass, and is invoked prior to qdisc_create(), should return failure onnot finding the class.In this patch, we leverage qdisc_leaf to return ERR_PTRs whenever theparentid doesn t correspond to a class, so that we can detect itearlier on and abort before qdisc_create is called.[1] https://lore.kernel.org/netdev/
In the Linux kernel, the following vulnerability has beenresolved:net/sched:Abort __tc_modify_qdisc if parent class does not existLion s patch [1] revealed an ancient bug in the qdiscAPI.Whenever a usercreates/modifies a qdisc specifying as a parent anotherqdisc, the qdisc APIwill, during grafting, detect that theuser isnot trying to attach to a class and reject. However grafting isperformed after qdisc_create (and thus the qdiscs init callback) isexecuted. In qdiscs that eventually call qdisc_tree_reduce_backlogduring init or change (such as fq, hhf, choke, etc), an issuearises. For example, executing the following commands:sudo tc qdisc add dev lo roothandle a: htbdefault 2sudotc qdisc add dev lo parent a: handle beeffqQdiscs suchas fq, hhf, choke, etc unconditionally invokeqdisc_tree_reduce_backlog() in their control path init() or change() whichthen causes a failure to find the child class; however, that does not stopthe unconditional invocation of the assumed child qdisc s qlen_notify witha null class. All these qdiscs make the assumption that class is non-null.The solution is ensure that qdisc_leaf() which looks up the parentclass, and is invoked prior to qdisc_create(), should return failure onnot finding the class.In this patch, we leverage qdisc_leaf to return ERR_PTRs whenever theparentid doesn t correspond to a class, so that we can detect itearlier on and abort before qdisc_create is called.[1] https://lore.kernel.org/netdev/
A vulnerability, which was classified as problematic, hasbeen found in LinuxKernel up to 6.16-rc5 (Operating System).Impacted is confidentiality, integrity, and availability.Upgradingto version 5.4.296,5.10.240, 5.15.189, 6.1.146, 6.6.99, 6.12.39, 6.15.7 or 6.16-rc6 eliminatesthis vulnerability. Applying the patch923a276c74e25073ae391e930792ac86a9f77f1e/90436e72c9622c2f70389070088325a3232d339f/25452638f133ac19d75af3f928327d8016952c8e/23c165dde88eac405eebb59051ea1fe139a45803/4c691d1b6b6dbd73f30ed9ee7da05f037b0c49af/8ecd651ef24ab50123692a4e3e25db93cb11602a/e28a383d6485c3bb51dc5953552f76c4dea33eea/ffdde7bf5a439aaa1955ebd581f5c64ab1533963 is able to eliminatethis problem.The bugfix isready for download at git.kernel.org. Thebest possiblemitigation is suggested to be upgrading to the latest version.
A vulnerability, which was classified as problematic, hasbeen found in LinuxKernel up to 6.16-rc5 (Operating System).Impacted is confidentiality, integrity, and availability.Upgradingto version 5.4.296,5.10.240, 5.15.189, 6.1.146, 6.6.99, 6.12.39, 6.15.7 or 6.16-rc6 eliminatesthis vulnerability. Applying the patch923a276c74e25073ae391e930792ac86a9f77f1e/90436e72c9622c2f70389070088325a3232d339f/25452638f133ac19d75af3f928327d8016952c8e/23c165dde88eac405eebb59051ea1fe139a45803/4c691d1b6b6dbd73f30ed9ee7da05f037b0c49af/8ecd651ef24ab50123692a4e3e25db93cb11602a/e28a383d6485c3bb51dc5953552f76c4dea33eea/ffdde7bf5a439aaa1955ebd581f5c64ab1533963 is able to eliminatethis problem.The bugfix isready for download at git.kernel.org. Thebest possiblemitigation is suggested to be upgrading to the latest version.
In the Linux kernel, the following vulnerability has beenresolved:net/sched:Abort __tc_modify_qdisc if parent class does not existLion s patch [1] revealed an ancient bug in the qdiscAPI.Whenever a usercreates/modifies a qdisc specifying as a parent anotherqdisc, the qdisc APIwill, during grafting, detect that theuser isnot trying to attach to a class and reject. However grafting isperformed after qdisc_create (and thus the qdiscs init callback) isexecuted. In qdiscs that eventually call qdisc_tree_reduce_backlogduring init or change (such as fq, hhf, choke, etc), an issuearises. For example, executing the following commands:sudo tc qdisc add dev lo roothandle a: htbdefault 2sudotc qdisc add dev lo parent a: handle beeffqQdiscs suchas fq, hhf, choke, etc unconditionally invokeqdisc_tree_reduce_backlog() in their control path init() or change() whichthen causes a failure to find the child class; however, that does not stopthe unconditional invocation of the assumed child qdisc s qlen_notify witha null class. All these qdiscs make the assumption that class is non-null.The solution is ensure that qdisc_leaf() which looks up the parentclass, and is invoked prior to qdisc_create(), should return failure onnot finding the class.In this patch, we leverage qdisc_leaf to return ERR_PTRs whenever theparentid doesn t correspond to a class, so that we can detect itearlier on and abort before qdisc_create is called.[1] https://lore.kernel.org/netdev/
In the Linux kernel, the following vulnerability has beenresolved:net/sched:Abort __tc_modify_qdisc if parent class does not existLion s patch [1] revealed an ancient bug in the qdiscAPI.Whenever a usercreates/modifies a qdisc specifying as a parent anotherqdisc, the qdisc APIwill, during grafting, detect that theuser isnot trying to attach to a class and reject. However grafting isperformed after qdisc_create (and thus the qdiscs init callback) isexecuted. In qdiscs that eventually call qdisc_tree_reduce_backlogduring init or change (such as fq, hhf, choke, etc), an issuearises. For example, executing the following commands:sudo tc qdisc add dev lo roothandle a: htbdefault 2sudotc qdisc add dev lo parent a: handle beeffqQdiscs suchas fq, hhf, choke, etc unconditionally invokeqdisc_tree_reduce_backlog() in their control path init() or change() whichthen causes a failure to find the child class; however, that does not stopthe unconditional invocation of the assumed child qdisc s qlen_notify witha null class. All these qdiscs make the assumption that class is non-null.The solution is ensure that qdisc_leaf() which looks up the parentclass, and is invoked prior to qdisc_create(), should return failure onnot finding the class.In this patch, we leverage qdisc_leaf to return ERR_PTRs whenever theparentid doesn t correspond to a class, so that we can detect itearlier on and abort before qdisc_create is called.[1] https://lore.kernel.org/netdev/
A vulnerability, which was classified as problematic, hasbeen found in LinuxKernel up to 6.16-rc5 (Operating System).Impacted is confidentiality, integrity, and availability.Upgradingto version 5.4.296,5.10.240, 5.15.189, 6.1.146, 6.6.99, 6.12.39, 6.15.7 or 6.16-rc6 eliminatesthis vulnerability. Applying the patch923a276c74e25073ae391e930792ac86a9f77f1e/90436e72c9622c2f70389070088325a3232d339f/25452638f133ac19d75af3f928327d8016952c8e/23c165dde88eac405eebb59051ea1fe139a45803/4c691d1b6b6dbd73f30ed9ee7da05f037b0c49af/8ecd651ef24ab50123692a4e3e25db93cb11602a/e28a383d6485c3bb51dc5953552f76c4dea33eea/ffdde7bf5a439aaa1955ebd581f5c64ab1533963 is able to eliminatethis problem.The bugfix isready for download at git.kernel.org. Thebest possiblemitigation is suggested to be upgrading to the latest version.
A vulnerability, which was classified as problematic, hasbeen found in LinuxKernel up to 6.16-rc5 (Operating System).Impacted is confidentiality, integrity, and availability.Upgradingto version 5.4.296,5.10.240, 5.15.189, 6.1.146, 6.6.99, 6.12.39, 6.15.7 or 6.16-rc6 eliminatesthis vulnerability. Applying the patch923a276c74e25073ae391e930792ac86a9f77f1e/90436e72c9622c2f70389070088325a3232d339f/25452638f133ac19d75af3f928327d8016952c8e/23c165dde88eac405eebb59051ea1fe139a45803/4c691d1b6b6dbd73f30ed9ee7da05f037b0c49af/8ecd651ef24ab50123692a4e3e25db93cb11602a/e28a383d6485c3bb51dc5953552f76c4dea33eea/ffdde7bf5a439aaa1955ebd581f5c64ab1533963 is able to eliminatethis problem.The bugfix isready for download at git.kernel.org. Thebest possiblemitigation is suggested to be upgrading to the latest version.
In the Linux kernel, the following vulnerability has beenresolved:net/sched:Abort __tc_modify_qdisc if parent class does not existLion s patch [1] revealed an ancient bug in the qdiscAPI.Whenever a usercreates/modifies a qdisc specifying as a parent anotherqdisc, the qdisc APIwill, during grafting, detect that theuser isnot trying to attach to a class and reject. However grafting isperformed after qdisc_create (and thus the qdiscs init callback) isexecuted. In qdiscs that eventually call qdisc_tree_reduce_backlogduring init or change (such as fq, hhf, choke, etc), an issuearises. For example, executing the following commands:sudo tc qdisc add dev lo roothandle a: htbdefault 2sudotc qdisc add dev lo parent a: handle beeffqQdiscs suchas fq, hhf, choke, etc unconditionally invokeqdisc_tree_reduce_backlog() in their control path init() or change() whichthen causes a failure to find the child class; however, that does not stopthe unconditional invocation of the assumed child qdisc s qlen_notify witha null class. All these qdiscs make the assumption that class is non-null.The solution is ensure that qdisc_leaf() which looks up the parentclass, and is invoked prior to qdisc_create(), should return failure onnot finding the class.In this patch, we leverage qdisc_leaf to return ERR_PTRs whenever theparentid doesn t correspond to a class, so that we can detect itearlier on and abort before qdisc_create is called.[1] https://lore.kernel.org/netdev/
In the Linux kernel, the following vulnerability has beenresolved:net/sched:Abort __tc_modify_qdisc if parent class does not existLion s patch [1] revealed an ancient bug in the qdiscAPI.Whenever a usercreates/modifies a qdisc specifying as a parent anotherqdisc, the qdisc APIwill, during grafting, detect that theuser isnot trying to attach to a class and reject. However grafting isperformed after qdisc_create (and thus the qdiscs init callback) isexecuted. In qdiscs that eventually call qdisc_tree_reduce_backlogduring init or change (such as fq, hhf, choke, etc), an issuearises. For example, executing the following commands:sudo tc qdisc add dev lo roothandle a: htbdefault 2sudotc qdisc add dev lo parent a: handle beeffqQdiscs suchas fq, hhf, choke, etc unconditionally invokeqdisc_tree_reduce_backlog() in their control path init() or change() whichthen causes a failure to find the child class; however, that does not stopthe unconditional invocation of the assumed child qdisc s qlen_notify witha null class. All these qdiscs make the assumption that class is non-null.The solution is ensure that qdisc_leaf() which looks up the parentclass, and is invoked prior to qdisc_create(), should return failure onnot finding the class.In this patch, we leverage qdisc_leaf to return ERR_PTRs whenever theparentid doesn t correspond to a class, so that we can detect itearlier on and abort before qdisc_create is called.[1] https://lore.kernel.org/netdev/
A vulnerability, which was classified as problematic, hasbeen found in LinuxKernel up to 6.16-rc5 (Operating System).Impacted is confidentiality, integrity, and availability.Upgradingto version 5.4.296,5.10.240, 5.15.189, 6.1.146, 6.6.99, 6.12.39, 6.15.7 or 6.16-rc6 eliminatesthis vulnerability. Applying the patch923a276c74e25073ae391e930792ac86a9f77f1e/90436e72c9622c2f70389070088325a3232d339f/25452638f133ac19d75af3f928327d8016952c8e/23c165dde88eac405eebb59051ea1fe139a45803/4c691d1b6b6dbd73f30ed9ee7da05f037b0c49af/8ecd651ef24ab50123692a4e3e25db93cb11602a/e28a383d6485c3bb51dc5953552f76c4dea33eea/ffdde7bf5a439aaa1955ebd581f5c64ab1533963 is able to eliminatethis problem.The bugfix isready for download at git.kernel.org. Thebest possiblemitigation is suggested to be upgrading to the latest version.
A vulnerability, which was classified as problematic, hasbeen found in LinuxKernel up to 6.16-rc5 (Operating System).Impacted is confidentiality, integrity, and availability.Upgradingto version 5.4.296,5.10.240, 5.15.189, 6.1.146, 6.6.99, 6.12.39, 6.15.7 or 6.16-rc6 eliminatesthis vulnerability. Applying the patch923a276c74e25073ae391e930792ac86a9f77f1e/90436e72c9622c2f70389070088325a3232d339f/25452638f133ac19d75af3f928327d8016952c8e/23c165dde88eac405eebb59051ea1fe139a45803/4c691d1b6b6dbd73f30ed9ee7da05f037b0c49af/8ecd651ef24ab50123692a4e3e25db93cb11602a/e28a383d6485c3bb51dc5953552f76c4dea33eea/ffdde7bf5a439aaa1955ebd581f5c64ab1533963 is able to eliminatethis problem.The bugfix isready for download at git.kernel.org. Thebest possiblemitigation is suggested to be upgrading to the latest version.
In the Linux kernel, the following vulnerability has beenresolved:net/sched:Abort __tc_modify_qdisc if parent class does not existLion s patch [1] revealed an ancient bug in the qdiscAPI.Whenever a usercreates/modifies a qdisc specifying as a parent anotherqdisc, the qdisc APIwill, during grafting, detect that theuser isnot trying to attach to a class and reject. However grafting isperformed after qdisc_create (and thus the qdiscs init callback) isexecuted. In qdiscs that eventually call qdisc_tree_reduce_backlogduring init or change (such as fq, hhf, choke, etc), an issuearises. For example, executing the following commands:sudo tc qdisc add dev lo roothandle a: htbdefault 2sudotc qdisc add dev lo parent a: handle beeffqQdiscs suchas fq, hhf, choke, etc unconditionally invokeqdisc_tree_reduce_backlog() in their control path init() or change() whichthen causes a failure to find the child class; however, that does not stopthe unconditional invocation of the assumed child qdisc s qlen_notify witha null class. All these qdiscs make the assumption that class is non-null.The solution is ensure that qdisc_leaf() which looks up the parentclass, and is invoked prior to qdisc_create(), should return failure onnot finding the class.In this patch, we leverage qdisc_leaf to return ERR_PTRs whenever theparentid doesn t correspond to a class, so that we can detect itearlier on and abort before qdisc_create is called.[1] https://lore.kernel.org/netdev/
