linux-kernel - [syzbot] [xfs?] WARNING in xfs_bmap_extents_to

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Date:   Tue, 28 Mar 2023 21:08:01 -0700
From:   syzbot <syzbot+0c383e46e9b4827b01b1@...kaller.appspotmail.com>
To:     djwong@...nel.org, linux-fsdevel@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-xfs@...r.kernel.org,
        syzkaller-bugs@...glegroups.com
Subject: [syzbot] [xfs?] WARNING in xfs_bmap_extents_to_btree

Hello,

syzbot found the following issue on:

HEAD commit:    1e760fa3596e Merge tag 'gfs2-v6.3-rc3-fix' of git://git.ke..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=16f83651c80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=acdb62bf488a8fe5
dashboard link: https://syzkaller.appspot.com/bug?extid=0c383e46e9b4827b01b1
compiler:       Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/17229b6e6fe0/disk-1e760fa3.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/69b5d310fba0/vmlinux-1e760fa3.xz
kernel image: https://storage.googleapis.com/syzbot-assets/0c65624aace9/bzImage-1e760fa3.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+0c383e46e9b4827b01b1@...kaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 1 PID: 24101 at fs/xfs/libxfs/xfs_bmap.c:660 xfs_bmap_extents_to_btree+0xe1b/0x1190
Modules linked in:
CPU: 1 PID: 24101 Comm: kworker/1:24 Not tainted 6.3.0-rc3-syzkaller-00031-g1e760fa3596e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Workqueue: xfs-conv/loop0 xfs_end_io
RIP: 0010:xfs_bmap_extents_to_btree+0xe1b/0x1190 fs/xfs/libxfs/xfs_bmap.c:660
Code: 01 00 00 44 0f 44 f0 48 8b 84 24 88 00 00 00 42 0f b6 04 28 84 c0 0f 85 91 02 00 00 45 89 34 24 e9 10 fb ff ff e8 f5 81 75 fe <0f> 0b 41 bf e4 ff ff ff 48 8b 5c 24 18 e9 bd fa ff ff 89 d9 80 e1
RSP: 0018:ffffc9000346efe0 EFLAGS: 00010293
RAX: ffffffff8314eb2b RBX: ffffffffffffffff RCX: ffff8880338657c0
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: ffffffffffffffff
RBP: ffffc9000346f270 R08: ffffffff8314e358 R09: fffffbfff1ca6eae
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff110038bc80f
R13: dffffc0000000000 R14: 0000000000000000 R15: ffff88801c5e4000
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000558b6f323000 CR3: 0000000042288000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 xfs_bmap_add_extent_unwritten_real+0x1eec/0x31f0 fs/xfs/libxfs/xfs_bmap.c:2426
 xfs_bmapi_convert_unwritten+0x505/0x6e0 fs/xfs/libxfs/xfs_bmap.c:4191
 xfs_bmapi_write+0xb55/0x1980 fs/xfs/libxfs/xfs_bmap.c:4418
 xfs_iomap_write_unwritten+0x45f/0xc40 fs/xfs/xfs_iomap.c:615
 xfs_end_ioend+0x232/0x4d0 fs/xfs/xfs_aops.c:131
 xfs_end_io+0x2e5/0x370 fs/xfs/xfs_aops.c:173
 process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2390
 worker_thread+0xa63/0x1210 kernel/workqueue.c:2537
 kthread+0x270/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>


---
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