From: Pedro Demarchi Gomes <pedrodemargomes@gmail.com>
To: syzbot+4f9c823a6f63d87491ba@syzkaller.appspotmail.com
Cc: jfs-discussion@lists.sourceforge.net,
linux-kernel@vger.kernel.org, shaggy@kernel.org,
syzkaller-bugs@googlegroups.com,
Pedro Demarchi Gomes <pedrodemargomes@gmail.com>
Subject: [PATCH] jfs: Add check for array bounds in dtDelete
Date: Thu, 18 Sep 2025 18:04:14 -0300 [thread overview]
Message-ID: <20250918210414.15022-1-pedrodemargomes@gmail.com> (raw)
In-Reply-To: <67d9cf78.050a0220.3657bb.000f.GAE@google.com>
#syz test
---
fs/jfs/jfs_dtree.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/fs/jfs/jfs_dtree.c b/fs/jfs/jfs_dtree.c
index ab11849cf9cc..b30f57304c09 100644
--- a/fs/jfs/jfs_dtree.c
+++ b/fs/jfs/jfs_dtree.c
@@ -2129,6 +2129,14 @@ int dtDelete(tid_t tid,
next_index = -1;
else {
stbl = DT_GETSTBL(np);
+ if (stbl[0] < 0 || stbl[0] >= DTPAGEMAXSLOT) {
+ jfs_err("JFS: Invalid stbl[0] = %d for inode %ld, block = %lld",
+ stbl[0], (long)ip->i_ino, (long long)le64_to_cpu(p->header.next));
+ DT_PUTPAGE(nmp);
+ DT_PUTPAGE(mp);
+ return -EIO;
+ }
+
ldtentry =
(struct ldtentry *) & np->
slot[stbl[0]];
--
2.39.5
next prev parent reply other threads:[~2025-09-18 21:11 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-18 19:54 [syzbot] [jfs?] UBSAN: array-index-out-of-bounds " syzbot
2025-04-18 3:25 ` [syzbot] " syzbot
2025-09-18 21:04 ` Pedro Demarchi Gomes [this message]
2025-09-18 21:27 ` syzbot
2025-09-19 15:23 ` Forwarded: " syzbot
2025-09-19 22:50 [PATCH] jfs: Add check for array bounds " Pedro Demarchi Gomes
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