diff options
| author | Ethan Tidmore <ethantidmore06@gmail.com> | 2026-02-19 21:38:25 -0600 |
|---|---|---|
| committer | Carlos Maiolino <cem@kernel.org> | 2026-02-25 13:58:48 +0100 |
| commit | cddfa648f1ab99e30e91455be19cd5ade26338c2 (patch) | |
| tree | 6d145832dd9c2ba1f5a3b5e9d7770315894ea1de /fs | |
| parent | 47553dd60b1da88df2354f841a4f71dd4de6478a (diff) | |
xfs: Fix error pointer dereference
The function try_lookup_noperm() can return an error pointer and is not
checked for one.
Add checks for error pointer in xrep_adoption_check_dcache() and
xrep_adoption_zap_dcache().
Detected by Smatch:
fs/xfs/scrub/orphanage.c:449 xrep_adoption_check_dcache() error:
'd_child' dereferencing possible ERR_PTR()
fs/xfs/scrub/orphanage.c:485 xrep_adoption_zap_dcache() error:
'd_child' dereferencing possible ERR_PTR()
Fixes: 73597e3e42b4 ("xfs: ensure dentry consistency when the orphanage adopts a file")
Cc: stable@vger.kernel.org # v6.16
Signed-off-by: Ethan Tidmore <ethantidmore06@gmail.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Nirjhar Roy (IBM) <nirjhar.roy.lists@gmail.com>
Signed-off-by: Carlos Maiolino <cem@kernel.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/xfs/scrub/orphanage.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/fs/xfs/scrub/orphanage.c b/fs/xfs/scrub/orphanage.c index 52a108f6d5f4..33c6db6b4498 100644 --- a/fs/xfs/scrub/orphanage.c +++ b/fs/xfs/scrub/orphanage.c @@ -442,6 +442,11 @@ xrep_adoption_check_dcache( return 0; d_child = try_lookup_noperm(&qname, d_orphanage); + if (IS_ERR(d_child)) { + dput(d_orphanage); + return PTR_ERR(d_child); + } + if (d_child) { trace_xrep_adoption_check_child(sc->mp, d_child); @@ -479,7 +484,7 @@ xrep_adoption_zap_dcache( return; d_child = try_lookup_noperm(&qname, d_orphanage); - while (d_child != NULL) { + while (!IS_ERR_OR_NULL(d_child)) { trace_xrep_adoption_invalidate_child(sc->mp, d_child); ASSERT(d_is_negative(d_child)); |