Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: lockd: fix NULL dereference on lockowner allocation failure nlmclnt_locks_init_private() installs NLM file lock operations even when nlmclnt_find_lockowner() fails to allocate a lockowner. nlmclnt_proc() then returns -ENOMEM, but the VFS still tears down the partially initialized file_lock and calls locks_release_private(). That invokes nlmclnt_locks_release_private(), which dereferences fl->fl_u.nfs_fl.owner and crashes because the owner was never installed. Clear fl_ops before attempting to initialize the NLM private state, and install the NLM lock operations only after a lockowner has been allocated successfully.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 6db5af172ccc3223c8f730a9a4212f6427feee3e; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 07adfbb3de7529f58ca708a97ead7fa4fdb71056; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before d662f7fc04fde305a27f304b3cd19b614d366839; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 51af080ca4e553256c59a75a877b9b4fff828311; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 4c7fc129db061c7daab841c4f3c342d894832362 |
| Linux / Linux | affected 2.6.12; unaffected 0 before 2.6.12; unaffected 6.6.160 through 6.6.*; unaffected 6.12.109 through 6.12.*; unaffected 6.18.50 through 6.18.*; unaffected 7.2.4 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/6db5af172ccc3223c8f730a9a4212f6427feee3e
- https://git.kernel.org/stable/c/07adfbb3de7529f58ca708a97ead7fa4fdb71056
- https://git.kernel.org/stable/c/d662f7fc04fde305a27f304b3cd19b614d366839
- https://git.kernel.org/stable/c/51af080ca4e553256c59a75a877b9b4fff828311
- https://git.kernel.org/stable/c/4c7fc129db061c7daab841c4f3c342d894832362