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WARNING in __bch2_truncate_folio

Status: upstream: reported C repro on 2024/05/22 20:56
Subsystems: bcachefs
[Documentation on labels]
Reported-by: syzbot+3d11e35eeafe176a6c5b@syzkaller.appspotmail.com
First crash: 403d, last: 1h26m
Cause bisection: introduced by (bisect log) :
commit f7643bc9749f270d487c32dc35b578575bf1adb0
Author: Kent Overstreet <kent.overstreet@linux.dev>
Date: Wed Apr 17 05:26:02 2024 +0000

  bcachefs: make btree read errors silent during scan

Crash: WARNING in __bch2_truncate_folio (log)
Repro: C syz .config
  
▶ ▼ Discussions (4)
Title Replies (including bot) Last reply
[syzbot] Monthly bcachefs report (Jun 2025) 2 (3) 2025/06/24 17:31
[syzbot] Monthly bcachefs report (Sep 2024) 0 (1) 2024/09/13 10:03
[syzbot] Monthly bcachefs report (Jul 2024) 0 (1) 2024/07/12 12:53
[syzbot] [bcachefs?] WARNING in __bch2_truncate_folio 0 (1) 2024/05/22 20:56
▶ ▼ Last patch testing requests (6)
Created Duration User Patch Repo Result
2025/06/06 07:29 15m retest repro upstream report log
2025/06/06 07:29 15m retest repro upstream report log
2025/03/19 00:00 15m retest repro upstream report log
2025/03/18 01:17 21m retest repro upstream OK log
2024/08/14 21:37 30m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci OK log
2024/07/26 09:19 23m retest repro upstream OK log
▶ ▼ Fix bisection attempts (1)
Created Duration User Patch Repo Result
2025/06/22 14:09 2h07m bisect fix upstream OK (0) job log log

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 5826 at fs/bcachefs/fs-io.c:359 __bch2_truncate_folio+0x173a/0x19d0 fs/bcachefs/fs-io.c:359
Modules linked in:
CPU: 1 UID: 0 PID: 5826 Comm: syz-executor336 Not tainted 6.15.0-rc7-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__bch2_truncate_folio+0x173a/0x19d0 fs/bcachefs/fs-io.c:359
Code: 5f 5d e9 89 7c 20 07 cc e8 03 26 8e fd 48 c7 c7 90 a9 7b 8d e8 47 27 ea ff 89 05 d1 40 66 15 e9 ab ea ff ff e8 e7 25 8e fd 90 <0f> 0b 90 e9 88 f9 ff ff e8 59 ab 1d 07 e8 d4 25 8e fd be 00 10 00
RSP: 0018:ffffc9000425f4c0 EFLAGS: 00010293
RAX: ffffffff8431caf9 RBX: 0000000000000000 RCX: ffff88807c929e00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000425f690 R08: ffffea00009d99c7 R09: 1ffffd400013b338
R10: dffffc0000000000 R11: fffff9400013b339 R12: 1ffff1100ee6f0fd
R13: dffffc0000000000 R14: ffff8880773787e8 R15: 0000000000000000
FS:  0000555580818380(0000) GS:ffff8881261f6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8b038c70f8 CR3: 000000007acba000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bch2_truncate_folios fs/bcachefs/fs-io.c:398 [inline]
 bchfs_fpunch+0x10f/0x520 fs/bcachefs/fs-io.c:564
 bch2_fallocate_dispatch+0x379/0x4e0 fs/bcachefs/fs-io.c:838
 vfs_fallocate+0x6a0/0x830 fs/open.c:338
 ioctl_preallocate fs/ioctl.c:290 [inline]
 file_ioctl fs/ioctl.c:-1 [inline]
 do_vfs_ioctl+0x1b8f/0x1eb0 fs/ioctl.c:885
 __do_sys_ioctl fs/ioctl.c:904 [inline]
 __se_sys_ioctl+0x82/0x170 fs/ioctl.c:892
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8b0384ab59
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffcc0bbdf38 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0031656c69662f2e RCX: 00007f8b0384ab59
RDX: 00002000000000c0 RSI: 0000000040305829 RDI: 0000000000000004
RBP: 00007f8b038c35f0 R08: 00005555808194c0 R09: 00005555808194c0
R10: 00005555808194c0 R11: 0000000000000246 R12: 00007ffcc0bbdf60
R13: 00007ffcc0bbe188 R14: 431bde82d7b634db R15: 00007f8b0389303b
 </TASK>

Crashes (327):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/05/20 23:31 upstream a5806cd506af b47f9e02 .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/02/04 05:13 upstream 0de63bb7d919 8f267cef .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs WARNING in __bch2_truncate_folio
2024/05/22 05:08 upstream b6394d6f7159 1014eca7 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs WARNING in __bch2_truncate_folio
2024/07/31 17:44 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci c912bf709078 6fde257d .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-gce-arm64 WARNING in __bch2_truncate_folio
2025/05/22 16:29 upstream d608703fcdd9 0919b50b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/05/20 22:50 upstream a5806cd506af b47f9e02 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/03/24 04:42 upstream 586de92313fc 875573af .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/03/04 01:10 upstream 99fa936e8e4f c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/03/02 00:29 upstream 03d38806a902 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/02/26 11:44 upstream ac9c34d1e45a d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/02/22 05:54 upstream 8a61cb6e150e d34966d1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/02/21 06:45 upstream e9a8cac0bf89 0808a665 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/02/18 06:55 upstream 2408a807bfc3 429ea007 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/02/18 01:26 upstream 2408a807bfc3 429ea007 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/02/04 04:42 upstream 0de63bb7d919 8f267cef .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/01/31 22:28 upstream 69b8923f5003 aa47157c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2024/12/08 18:49 upstream 7503345ac5f5 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in __bch2_truncate_folio
2024/07/10 03:16 upstream 34afb82a3c67 79d68ada .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in __bch2_truncate_folio
2024/06/06 23:50 upstream 2df0193e62cf 121701b6 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in __bch2_truncate_folio
2024/05/29 04:39 upstream e0cce98fe279 34889ee3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in __bch2_truncate_folio
2025/05/05 12:07 upstream 92a09c47464d 6ca47dd8 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/04/25 07:50 upstream e72e9e693307 e3715315 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/04/24 07:21 upstream a79be02bba5c 9882047a .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/04/22 06:00 upstream a33b5a08cbbd 2a20f901 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/04/20 05:50 upstream 119009db2674 2a20f901 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/04/16 03:05 upstream 1a1d569a75f3 a95239b1 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/04/07 06:57 upstream 0af2f6be1b42 1c65791e .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/02/17 14:23 upstream 0ad2507d5d93 4121cf9d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/01/20 10:44 upstream ffd294d346d1 f2cb035c .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/01/20 07:38 upstream 9528d418de4d f2cb035c .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/01/20 04:03 upstream 9528d418de4d f2cb035c .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/01/19 21:42 upstream 9528d418de4d f2cb035c .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/01/19 09:52 upstream fda5e3f28400 f2cb035c .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/01/17 21:25 upstream 9bffa1ad25b8 bb91bdd4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/01/17 05:10 upstream ce69b4019001 f9e07a6e .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/01/16 16:24 upstream 619f0b6fad52 f9e07a6e .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/01/16 13:16 upstream 619f0b6fad52 968edaf4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/01/15 20:26 upstream 619f0b6fad52 968edaf4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/01/15 19:12 upstream 619f0b6fad52 968edaf4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/01/15 14:35 upstream 619f0b6fad52 968edaf4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/01/14 15:06 upstream c45323b7560e 0dce2409 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/01/14 03:29 upstream c45323b7560e b1f1cd88 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/01/12 15:55 upstream b62cef9a5c67 6dbc6a9b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/01/11 06:45 upstream 77a903cd8e5a 6dbc6a9b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/01/09 01:30 upstream 0b7958fa05d5 f3558dbf .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/01/08 21:41 upstream 0b7958fa05d5 f3558dbf .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/01/08 06:18 upstream 09a0fa92e5b4 f3558dbf .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/01/08 04:52 upstream 09a0fa92e5b4 f3558dbf .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/01/07 23:30 upstream fbfd64d25c7a f3558dbf .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/01/07 03:31 upstream fbfd64d25c7a f3558dbf .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/01/05 07:36 upstream ab75170520d4 f3558dbf .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2024/10/23 22:32 upstream c2ee9f594da8 15fa2979 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2024/05/29 01:38 upstream e0cce98fe279 c2e07261 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in __bch2_truncate_folio
2024/05/29 01:41 linux-next 6dc544b66971 34889ee3 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in __bch2_truncate_folio
2025/06/30 00:11 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 9aa9b43d689e fc9d8ee5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __bch2_truncate_folio
2025/04/04 14:17 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci d6b13dbd03b7 d7ae3a11 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __bch2_truncate_folio
2025/03/30 13:47 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci a2392f333575 d3999433 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __bch2_truncate_folio
2025/01/10 16:23 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 577490b6abb9 67d7ec0a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __bch2_truncate_folio
2025/01/08 16:37 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 573067a5a685 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __bch2_truncate_folio
* Struck through repros no longer work on HEAD.