From: Eric Sandeen <sandeen@sandeen.net>
To: Eric Sandeen <sandeen@redhat.com>, xfs-oss <xfs@oss.sgi.com>
Cc: Adrien Nader <adrien@notk.org>
Subject: [PATCH V2] xfs: fix NULL pointer dereference in xfs_filestream_lookup_ag()
Date: Wed, 04 Mar 2015 15:08:21 -0600 [thread overview]
Message-ID: <54F77445.3010809@sandeen.net> (raw)
In-Reply-To: <54F61641.1010708@redhat.com>
If xfs_filestream_get_parent() fails, we have a null pip,
goto out, and attempt to IRELE(NULL). This causes a null
pointer dereference and BUG().
Fix this by directly returning NULLAGNUMBER in this case.
Reported-by: Adrien Nader <adrien@notk.org>
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
---
V2: skip the goto, because Dave doesn't like it. ;)
diff --git a/fs/xfs/xfs_filestream.c b/fs/xfs/xfs_filestream.c
index a2e86e8..8f9f854 100644
--- a/fs/xfs/xfs_filestream.c
+++ b/fs/xfs/xfs_filestream.c
@@ -322,7 +322,7 @@ xfs_filestream_lookup_ag(
pip = xfs_filestream_get_parent(ip);
if (!pip)
- goto out;
+ return NULLAGNUMBER;
mru = xfs_mru_cache_lookup(mp->m_filestream, pip->i_ino);
if (mru) {
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prev parent reply other threads:[~2015-03-04 21:08 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-03 20:14 [PATCH] xfs: don't release NULL pip in xfs_filestream_lookup_ag() Eric Sandeen
2015-03-03 21:30 ` Dave Chinner
2015-03-04 21:08 ` Eric Sandeen [this message]
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