From: Edward Adam Davis <eadavis@qq.com>
To: syzbot+3c010e21296f33a5dc16@syzkaller.appspotmail.com
Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: [syzbot] [jfs?] KASAN: slab-use-after-free Read in dbFreeBits
Date: Sat, 17 Aug 2024 07:16:44 +0800 [thread overview]
Message-ID: <tencent_656E089498E91AEFC2CFEC78566F042E410A@qq.com> (raw)
In-Reply-To: <00000000000012a63d061fccab65@google.com>
sync jfs remount and jfs ioctrl with s_umount
#syz test: upstream master
diff --git a/fs/jfs/jfs_dmap.c b/fs/jfs/jfs_dmap.c
index cb3cda1390ad..a409ae18454a 100644
--- a/fs/jfs/jfs_dmap.c
+++ b/fs/jfs/jfs_dmap.c
@@ -1645,7 +1645,9 @@ s64 dbDiscardAG(struct inode *ip, int agno, s64 minlen)
* call jfs_issue_discard() itself */
if (!(JFS_SBI(sb)->flag & JFS_DISCARD))
jfs_issue_discard(ip, tt->blkno, tt->nblocks);
+ down_read(&sb->s_umount);
dbFree(ip, tt->blkno, tt->nblocks);
+ up_read(&sb->s_umount);
trimmed += tt->nblocks;
}
kfree(totrim);
next prev parent reply other threads:[~2024-08-16 23:16 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-08-16 13:09 syzbot
2024-08-16 23:16 ` Edward Adam Davis [this message]
2024-08-17 2:08 ` syzbot
2024-08-17 0:08 ` syzbot
2024-08-17 3:55 ` [PATCH] jfs: Fix uaf " Edward Adam Davis
2024-08-23 19:10 ` [Jfs-discussion] " Dave Kleikamp
2024-08-24 2:50 ` [PATCH V2] " Edward Adam Davis
2024-08-24 1:37 ` [syzbot] [jfs?] KASAN: slab-use-after-free Read " Edward Adam Davis
2024-08-24 2:26 ` syzbot
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