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| author | Olga Kornievskaia <okorniev@redhat.com> | 2024-10-05 01:04:03 +0300 |
|---|---|---|
| committer | Chuck Lever <chuck.lever@oracle.com> | 2024-10-05 22:44:25 +0300 |
| commit | c88c150a467fcb670a1608e2272beeee3e86df6e (patch) | |
| tree | 056f5666ded0d381bc29d45f53c483e21aee1f47 /tools/perf/scripts/python/export-to-sqlite.py | |
| parent | 53e4e17557049d7688ca9dadeae80864d40cf0b7 (diff) | |
| download | linux-c88c150a467fcb670a1608e2272beeee3e86df6e.tar.xz | |
nfsd: fix possible badness in FREE_STATEID
When multiple FREE_STATEIDs are sent for the same delegation stateid,
it can lead to a possible either use-after-free or counter refcount
underflow errors.
In nfsd4_free_stateid() under the client lock we find a delegation
stateid, however the code drops the lock before calling nfs4_put_stid(),
that allows another FREE_STATE to find the stateid again. The first one
will proceed to then free the stateid which leads to either
use-after-free or decrementing already zeroed counter.
Fixes: 3f29cc82a84c ("nfsd: split sc_status out of sc_type")
Signed-off-by: Olga Kornievskaia <okorniev@redhat.com>
Reviewed-by: Benjamin Coddington <bcodding@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-sqlite.py')
0 files changed, 0 insertions, 0 deletions