Description
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 products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 6db5af172ccc3223c8f730a9a4212f6427feee3eaffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 07adfbb3de7529f58ca708a97ead7fa4fdb71056affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < d662f7fc04fde305a27f304b3cd19b614d366839affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 51af080ca4e553256c59a75a877b9b4fff828311affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 4c7fc129db061c7daab841c4f3c342d894832362affected
Linux Linux
Default version status: affected
2.6.12affected0 to < 2.6.12unaffected6.6.160 to ≤ 6.6.*unaffected6.12.109 to ≤ 6.12.*unaffected6.18.50 to ≤ 6.18.*unaffected7.2.4 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
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 ↗