From: Ghanshyam Agrawal <ghanshyam1898@gmail.com>
To: shaggy@kernel.org, osmtendev@gmail.com, ghandatmanas@gmail.com,
eadavis@qq.com, ghanshyam1898@gmail.com
Cc: jfs-discussion@lists.sourceforge.net,
linux-kernel@vger.kernel.org,
syzbot+5f7f0caf9979e9d09ff8@syzkaller.appspotmail.com
Subject: [PATCH] jfs: fix array-index-out-of-bounds in dtInsertEntry
Date: Thu, 10 Oct 2024 19:13:51 +0530 [thread overview]
Message-ID: <20241010134351.1884580-1-ghanshyam1898@gmail.com> (raw)
The value of p->header.freelist can be less than zero which
causes an error in dtInsertEntry. Added a check in dtInsert
to address it.
Reported-by: syzbot+5f7f0caf9979e9d09ff8@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=5f7f0caf9979e9d09ff8
Signed-off-by: Ghanshyam Agrawal <ghanshyam1898@gmail.com>
---
fs/jfs/jfs_dtree.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/jfs/jfs_dtree.c b/fs/jfs/jfs_dtree.c
index 5d3127ca68a4..51bb3e14551b 100644
--- a/fs/jfs/jfs_dtree.c
+++ b/fs/jfs/jfs_dtree.c
@@ -834,7 +834,7 @@ int dtInsert(tid_t tid, struct inode *ip,
* the full page.
*/
DT_GETSEARCH(ip, btstack->top, bn, mp, p, index);
- if (p->header.freelist == 0)
+ if (p->header.freelist <= 0)
return -EINVAL;
/*
--
2.34.1
next reply other threads:[~2024-10-10 13:44 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-10 13:43 Ghanshyam Agrawal [this message]
2024-10-29 23:03 ` Dave Kleikamp
2024-10-30 21:39 ` Dave Kleikamp
2024-10-31 1:58 ` Ghanshyam Agrawal
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