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| author | Al Viro <[email protected]> | 2025-02-15 04:37:58 +0000 |
|---|---|---|
| committer | Al Viro <[email protected]> | 2025-06-17 21:58:14 +0000 |
| commit | 0d2da2561bdeb459b6c540c2417a15c1f8732e6a (patch) | |
| tree | ace92e44f378939e3cdcb75911e7de708a129d2e /drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | |
| parent | prep for ceph_encode_encrypted_fname() fixes (diff) | |
| download | kernel-0d2da2561bdeb459b6c540c2417a15c1f8732e6a.tar.gz kernel-0d2da2561bdeb459b6c540c2417a15c1f8732e6a.zip | |
ceph: fix a race with rename() in ceph_mdsc_build_path()
Lift copying the name into callers of ceph_encode_encrypted_dname()
that do not have it already copied; ceph_encode_encrypted_fname()
disappears.
That fixes a UAF in ceph_mdsc_build_path() - while the initial copy
of plaintext into buf is done under ->d_lock, we access the
original name again in ceph_encode_encrypted_fname() and that is
done without any locking. With ceph_encode_encrypted_dname() using
the stable copy the problem goes away.
Tested-by: Viacheslav Dubeyko <[email protected]>
Reviewed-by: Viacheslav Dubeyko <[email protected]>
Signed-off-by: Al Viro <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c')
0 files changed, 0 insertions, 0 deletions