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Message-ID: <2024110559-CVE-2024-50136-183b@gregkh> Date: Tue, 5 Nov 2024 18:11:25 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Subject: CVE-2024-50136: net/mlx5: Unregister notifier on eswitch init failure Description =========== In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Unregister notifier on eswitch init failure It otherwise remains registered and a subsequent attempt at eswitch enabling might trigger warnings of the sort: [ 682.589148] ------------[ cut here ]------------ [ 682.590204] notifier callback eswitch_vport_event [mlx5_core] already registered [ 682.590256] WARNING: CPU: 13 PID: 2660 at kernel/notifier.c:31 notifier_chain_register+0x3e/0x90 [...snipped] [ 682.610052] Call Trace: [ 682.610369] <TASK> [ 682.610663] ? __warn+0x7c/0x110 [ 682.611050] ? notifier_chain_register+0x3e/0x90 [ 682.611556] ? report_bug+0x148/0x170 [ 682.611977] ? handle_bug+0x36/0x70 [ 682.612384] ? exc_invalid_op+0x13/0x60 [ 682.612817] ? asm_exc_invalid_op+0x16/0x20 [ 682.613284] ? notifier_chain_register+0x3e/0x90 [ 682.613789] atomic_notifier_chain_register+0x25/0x40 [ 682.614322] mlx5_eswitch_enable_locked+0x1d4/0x3b0 [mlx5_core] [ 682.614965] mlx5_eswitch_enable+0xc9/0x100 [mlx5_core] [ 682.615551] mlx5_device_enable_sriov+0x25/0x340 [mlx5_core] [ 682.616170] mlx5_core_sriov_configure+0x50/0x170 [mlx5_core] [ 682.616789] sriov_numvfs_store+0xb0/0x1b0 [ 682.617248] kernfs_fop_write_iter+0x117/0x1a0 [ 682.617734] vfs_write+0x231/0x3f0 [ 682.618138] ksys_write+0x63/0xe0 [ 682.618536] do_syscall_64+0x4c/0x100 [ 682.618958] entry_SYSCALL_64_after_hwframe+0x4b/0x53 The Linux kernel CVE team has assigned CVE-2024-50136 to this issue. Affected and fixed versions =========================== Issue introduced in 6.1.60 with commit 0aa1e83a20f1 and fixed in 6.1.115 with commit e58fb7ddbab6 Issue introduced in 6.6 with commit 7624e58a8b3a and fixed in 6.6.59 with commit 9f2ccb6f3888 Issue introduced in 6.6 with commit 7624e58a8b3a and fixed in 6.11.6 with commit 599147722c57 Issue introduced in 6.6 with commit 7624e58a8b3a and fixed in 6.12-rc4 with commit 1da9cfd6c41c Issue introduced in 6.5.9 with commit dc426bd9d813 Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2024-50136 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: drivers/net/ethernet/mellanox/mlx5/core/eswitch.c Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/e58fb7ddbab6635191c26dea1af26b91cce00866 https://git.kernel.org/stable/c/9f2ccb6f3888bec45c00121ee43e4e72423b12c1 https://git.kernel.org/stable/c/599147722c5778c96292e2fbff4103abbdb45b1f https://git.kernel.org/stable/c/1da9cfd6c41c2e6bbe624d0568644e1521c33e12
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