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WARNING in __writeback_inodes_sb_nr

Status: upstream: reported C repro on 2020/09/20 14:27
Reported-by: syzbot+5c2dc141988585eb49ce@syzkaller.appspotmail.com
First crash: 650d, last: 27d

Fix bisection: failed (bisect log)
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in __writeback_inodes_sb_nr syz done error 2 572d 626d 0/22 upstream: reported syz repro on 2020/10/14 12:01

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 8122 at fs/fs-writeback.c:2370 __writeback_inodes_sb_nr.cold+0x11/0x18 fs/fs-writeback.c:2370
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 8122 Comm: btrfs-transacti Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 panic+0x26a/0x50e kernel/panic.c:186
 __warn.cold+0x20/0x5a kernel/panic.c:541
 report_bug+0x262/0x2b0 lib/bug.c:183
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038
RIP: 0010:__writeback_inodes_sb_nr.cold+0x11/0x18 fs/fs-writeback.c:2370
Code: e1 e8 36 ba 6d f9 48 c7 c7 c0 f9 74 88 e8 95 eb fe ff 0f 0b e9 75 12 b9 f9 e8 1e ba 6d f9 48 c7 c7 c0 f9 74 88 e8 7d eb fe ff <0f> 0b e9 c9 34 b9 f9 e8 06 ba 6d f9 48 c7 c7 c0 f9 74 88 e8 65 eb
RSP: 0018:ffff8880953e7c48 EFLAGS: 00010286
RAX: 0000000000000024 RBX: 1ffff11012a7cf8b RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed1012a7cf7b
RBP: ffff888094e42140 R08: 0000000000000024 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000006400
R13: ffff888094cdce40 R14: ffff888094e42270 R15: ffff8880953e7c88
 btrfs_start_delalloc_flush fs/btrfs/transaction.c:1927 [inline]
 btrfs_commit_transaction+0x1bb1/0x2480 fs/btrfs/transaction.c:2078
 transaction_kthread+0x385/0x490 fs/btrfs/disk-io.c:1794
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (35):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-linux-4-19 2022/06/05 11:16 linux-4.19.y 3f8a27f9e27b c8857892 .config log report syz C WARNING in __writeback_inodes_sb_nr
ci2-linux-4-19 2021/05/15 05:43 linux-4.19.y 3c8c23092588 8bdd5343 .config log report syz C WARNING in __writeback_inodes_sb_nr
ci2-linux-4-19 2021/04/05 11:26 linux-4.19.y 2034d6f0838e 6a81331a .config log report syz C WARNING in __writeback_inodes_sb_nr
ci2-linux-4-19 2020/10/02 11:10 linux-4.19.y b09c34517e1a 9602ddf4 .config log report syz C
ci2-linux-4-19 2020/09/20 17:13 linux-4.19.y 015e94d0e37b 9564d2e9 .config log report syz C
ci2-linux-4-19 2022/06/05 05:12 linux-4.19.y 3f8a27f9e27b c8857892 .config log report info WARNING in __writeback_inodes_sb_nr
ci2-linux-4-19 2022/02/15 19:13 linux-4.19.y 3f8a27f9e27b 8b9ca619 .config log report info WARNING in __writeback_inodes_sb_nr
ci2-linux-4-19 2021/06/25 05:33 linux-4.19.y eb575cd5d7f6 0edbbe31 .config log report info WARNING in __writeback_inodes_sb_nr
ci2-linux-4-19 2021/06/15 18:16 linux-4.19.y 9a2dc0e6c531 8022d7e3 .config log report info WARNING in __writeback_inodes_sb_nr
ci2-linux-4-19 2021/05/16 14:09 linux-4.19.y 3c8c23092588 f54a5c09 .config log report info WARNING in __writeback_inodes_sb_nr
ci2-linux-4-19 2021/05/12 00:16 linux-4.19.y 3c8c23092588 b3c3bb8e .config log report info WARNING in __writeback_inodes_sb_nr
ci2-linux-4-19 2021/04/20 16:15 linux-4.19.y 2965db2e004c c0ced557 .config log report info WARNING in __writeback_inodes_sb_nr
ci2-linux-4-19 2021/04/05 04:05 linux-4.19.y 2034d6f0838e 6a81331a .config log report info WARNING in __writeback_inodes_sb_nr
ci2-linux-4-19 2021/04/02 14:15 linux-4.19.y 2034d6f0838e 6a81331a .config log report info WARNING in __writeback_inodes_sb_nr
ci2-linux-4-19 2021/03/25 21:24 linux-4.19.y 78fec1611cbf 6a383ecf .config log report info WARNING in __writeback_inodes_sb_nr
ci2-linux-4-19 2021/02/12 00:21 linux-4.19.y 811218eceeaa a5f86b15 .config log report info WARNING in __writeback_inodes_sb_nr
ci2-linux-4-19 2021/02/04 23:08 linux-4.19.y 811218eceeaa 42b90a7c .config log report info WARNING in __writeback_inodes_sb_nr
ci2-linux-4-19 2021/02/04 19:38 linux-4.19.y 811218eceeaa 42b90a7c .config log report info WARNING in __writeback_inodes_sb_nr
ci2-linux-4-19 2021/02/04 09:47 linux-4.19.y 811218eceeaa 624dad51 .config log report info WARNING in __writeback_inodes_sb_nr
ci2-linux-4-19 2021/02/04 08:34 linux-4.19.y 811218eceeaa 624dad51 .config log report info WARNING in __writeback_inodes_sb_nr
ci2-linux-4-19 2021/02/04 00:36 linux-4.19.y 811218eceeaa 624dad51 .config log report info WARNING in __writeback_inodes_sb_nr
ci2-linux-4-19 2021/01/15 22:50 linux-4.19.y 675cc038067f 65a7a854 .config log report info
ci2-linux-4-19 2021/01/09 01:27 linux-4.19.y 4143d798313f c104d4a3 .config log report info
ci2-linux-4-19 2021/01/07 09:18 linux-4.19.y 4143d798313f c104d4a3 .config log report info
ci2-linux-4-19 2020/12/25 00:16 linux-4.19.y 13d2ce42de8c c2c1d1dd .config log report info
ci2-linux-4-19 2020/12/24 23:25 linux-4.19.y 13d2ce42de8c c2c1d1dd .config log report info
ci2-linux-4-19 2020/12/21 17:31 linux-4.19.y 13d2ce42de8c 04201c06 .config log report info
ci2-linux-4-19 2020/12/21 03:08 linux-4.19.y 13d2ce42de8c 04201c06 .config log report info
ci2-linux-4-19 2020/11/30 00:26 linux-4.19.y 0c88e405c97e a0092f9d .config log report info
ci2-linux-4-19 2020/10/30 12:48 linux-4.19.y f5d8eef067ac a6e3ac3b .config log report info
ci2-linux-4-19 2020/10/01 05:34 linux-4.19.y 10ad6cfd5736 a9767fb2 .config log report info
ci2-linux-4-19 2020/09/30 11:11 linux-4.19.y 10ad6cfd5736 8516f6d3 .config log report info
ci2-linux-4-19 2020/09/30 09:50 linux-4.19.y 10ad6cfd5736 8516f6d3 .config log report info
ci2-linux-4-19 2020/09/20 20:02 linux-4.19.y 015e94d0e37b 9564d2e9 .config log report info
ci2-linux-4-19 2020/09/20 14:26 linux-4.19.y 015e94d0e37b 9564d2e9 .config log report info