Description
In the Linux kernel, the following vulnerability has been resolved: net/mlx5: lag: Check for LAG device before creating debugfs __mlx5_lag_dev_add_mdev() may return 0 (success) even when an error occurs that is handled gracefully. Consequently, the initialization flow proceeds to call mlx5_ldev_add_debugfs() even when there is no valid LAG context. mlx5_ldev_add_debugfs() blindly created the debugfs directory and attributes. This exposed interfaces (like the members file) that rely on a valid ldev pointer, leading to potential NULL pointer dereferences if accessed when ldev is NULL. Add a check to verify that mlx5_lag_dev(dev) returns a valid pointer before attempting to create the debugfs entries.
Product status
7f46a0b7327ae261f9981888708dbca22c283900 (git) before a3db46d5f4df92630a96f7bc77b60e75c2353e06
7f46a0b7327ae261f9981888708dbca22c283900 (git) before 7129632cab3e4d23510b21930aa73b8d97a859f5
7f46a0b7327ae261f9981888708dbca22c283900 (git) before cfa774e6c920c81e700327bf10db8cb50d5db456
7f46a0b7327ae261f9981888708dbca22c283900 (git) before c53cf44588a93000f71817a6bb87a66353c48dee
7f46a0b7327ae261f9981888708dbca22c283900 (git) before 89c65f2fcd8801365b410f40a427cbcd7f4c28e9
7f46a0b7327ae261f9981888708dbca22c283900 (git) before bf16bca6653679d8a514d6c1c5a2c67065033f14
5.19
Any version before 5.19
6.1.168 (semver)
6.6.134 (semver)
6.12.81 (semver)
6.18.22 (semver)
6.19.12 (semver)
7.0 (original_commit_for_fix)
References
git.kernel.org/...c/a3db46d5f4df92630a96f7bc77b60e75c2353e06
git.kernel.org/...c/7129632cab3e4d23510b21930aa73b8d97a859f5
git.kernel.org/...c/cfa774e6c920c81e700327bf10db8cb50d5db456
git.kernel.org/...c/c53cf44588a93000f71817a6bb87a66353c48dee
git.kernel.org/...c/89c65f2fcd8801365b410f40a427cbcd7f4c28e9
git.kernel.org/...c/bf16bca6653679d8a514d6c1c5a2c67065033f14