Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: locking/lockdep: Fix NULL pointer dereference in __lock_set_class() register_lock_class() can return NULL when the lock class pool is exhausted, graph_lock() fails, or key validation fails. However, __lock_set_class() uses the return value directly in pointer arithmetic without a NULL check: class = register_lock_class(lock, subclass, 0); hlock->class_idx = class - lock_classes; If class is NULL, this computes a wild offset that corrupts hlock->class_idx. The subsequent reacquire_held_locks() call will invoke hlock_class() with this corrupted index, leading to a NULL or out-of-bounds pointer dereference. Add the missing NULL check, consistent with how __lock_acquire() already handles this case at the same call site.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 64aa348edc617dea17bbd01ddee4e47886d5ec8c before f6093ff67ea6e347574819ed23e96e0f82a25ffc; affected 64aa348edc617dea17bbd01ddee4e47886d5ec8c before 59a5c7dd331a3dab48100e1ef8e9bb4f9132a2b2; affected 64aa348edc617dea17bbd01ddee4e47886d5ec8c before f56e54fd24f05e9de528fcb77f6084f80c8066ce; affected 64aa348edc617dea17bbd01ddee4e47886d5ec8c before 5c3bff6cf26e6a54fbf8b893a879c32824d2d50d; affected 64aa348edc617dea17bbd01ddee4e47886d5ec8c before b2113dcd8238bf00ce37a34e67b29cf31d32a545; affected 64aa348edc617dea17bbd01ddee4e47886d5ec8c before e7c69c6695d84220847cca62a45e879e71e79e9d; affected 64aa348edc617dea17bbd01ddee4e47886d5ec8c before 9be10f49dfc2e4b472b3a5f346483b67374774b8; affected 64aa348edc617dea17bbd01ddee4e47886d5ec8c before 7577e00b9ab506202b9f1a33de3cc8cc6413a4db |
| Linux / Linux | affected 2.6.27; unaffected 0 before 2.6.27; unaffected 5.10.270 through 5.10.*; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.52 through 6.18.*; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/f6093ff67ea6e347574819ed23e96e0f82a25ffc
- https://git.kernel.org/stable/c/59a5c7dd331a3dab48100e1ef8e9bb4f9132a2b2
- https://git.kernel.org/stable/c/f56e54fd24f05e9de528fcb77f6084f80c8066ce
- https://git.kernel.org/stable/c/5c3bff6cf26e6a54fbf8b893a879c32824d2d50d
- https://git.kernel.org/stable/c/b2113dcd8238bf00ce37a34e67b29cf31d32a545
- https://git.kernel.org/stable/c/e7c69c6695d84220847cca62a45e879e71e79e9d
- https://git.kernel.org/stable/c/9be10f49dfc2e4b472b3a5f346483b67374774b8
- https://git.kernel.org/stable/c/7577e00b9ab506202b9f1a33de3cc8cc6413a4db