From: Edward Adam Davis <eadavis@qq.com>
To: syzbot+f51a2a34984e4d8888fd@syzkaller.appspotmail.com
Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [bfs?] general protection fault in bfs_get_block (3)
Date: Sun, 3 Nov 2024 14:08:10 +0800 [thread overview]
Message-ID: <tencent_357089BF2EF46ECD4C8DE7DF46F312CDC606@qq.com> (raw)
In-Reply-To: <67218131.050a0220.4735a.0265.GAE@google.com>
add a check for new bh
#syz test
diff --git a/fs/bfs/file.c b/fs/bfs/file.c
index fa66a09e496a..5fb6428d692d 100644
--- a/fs/bfs/file.c
+++ b/fs/bfs/file.c
@@ -40,6 +40,11 @@ static int bfs_move_block(unsigned long from, unsigned long to,
if (!bh)
return -EIO;
new = sb_getblk(sb, to);
+ if (!new || !buffer_uptodate(new)) {
+ bforget(bh);
+ return -ENOMEM;
+ }
+
memcpy(new->b_data, bh->b_data, bh->b_size);
mark_buffer_dirty(new);
bforget(bh);
next prev parent reply other threads:[~2024-11-03 6:08 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-30 0:43 syzbot
2024-11-03 1:37 ` Edward Adam Davis
2024-11-03 1:57 ` syzbot
2024-11-03 4:37 ` Edward Adam Davis
2024-11-03 4:53 ` syzbot
2024-11-03 6:08 ` Edward Adam Davis [this message]
2024-11-03 6:28 ` syzbot
2024-11-03 14:08 ` Edward Adam Davis
2024-11-03 14:33 ` syzbot
2024-11-03 14:36 ` [PATCH] bfs: add check for return value of sb_getblk Edward Adam Davis
2024-11-15 17:58 ` [syzbot] [bfs?] general protection fault in bfs_get_block (3) syzbot
2025-11-19 18:40 ` Forwarded: " syzbot
[not found] <CAHjv_atfaaAbS_-KWuqV3j4_x1E45BS9oPzM26GeTPvQbzHyvQ@mail.gmail.com>
2025-11-19 19:14 ` [syzbot] [bfs?] " syzbot
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