Fix potential memory leak in function get_next_unlinked(). Call
libxfs_irele(ip) before exiting.
Details:
Error: RESOURCE_LEAK (CWE-772):
xfsprogs-6.5.0/db/iunlink.c:51:2: alloc_arg: "libxfs_iget" allocates memory that is stored into "ip".
xfsprogs-6.5.0/db/iunlink.c:68:2: noescape: Resource "&ip->i_imap" is not freed or pointed-to in "libxfs_imap_to_bp".
xfsprogs-6.5.0/db/iunlink.c:76:2: leaked_storage: Variable "ip" going out of scope leaks the storage it points to.
# 74| libxfs_buf_relse(ino_bp);
# 75|
# 76|-> return ret;
# 77| bad:
# 78| dbprintf(_("AG %u agino %u: %s\n"), agno, agino, strerror(error));
Signed-off-by: Bill O'Donnell <bodonnel@xxxxxxxxxx>
---
v2: cover error case.
v3: fix coverage to not release unitialized variable.
v4: add logic to cover error case when ip is not attained.
v5: no need to release a NULL tp in the first error case.
---
db/iunlink.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/db/iunlink.c b/db/iunlink.c
index d87562e3..35dbc3a0 100644
--- a/db/iunlink.c
+++ b/db/iunlink.c
@@ -66,12 +66,15 @@ get_next_unlinked(
}
error = -libxfs_imap_to_bp(mp, NULL, &ip->i_imap, &ino_bp);
- if (error)
+ if (error) {
+ libxfs_irele(ip);
goto bad;
+ }
dip = xfs_buf_offset(ino_bp, ip->i_imap.im_boffset);
ret = be32_to_cpu(dip->di_next_unlinked);
libxfs_buf_relse(ino_bp);
+ libxfs_irele(ip);
return ret;
bad:
--
2.46.0
