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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: 517d, last: 17d
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 (7)
Title Replies (including bot) Last reply
[syzbot] Monthly bcachefs report (Sep 2025) 0 (1) 2025/09/26 05:14
[syzbot] Monthly bcachefs report (Aug 2025) 0 (1) 2025/08/26 07:13
[syzbot] Monthly bcachefs report (Jul 2025) 0 (1) 2025/07/25 12:39
[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 (9)
Created Duration User Patch Repo Result
2025/10/18 12:29 22m retest repro upstream OK log
2025/10/18 12:29 31m retest repro upstream OK log
2025/10/18 12:29 22m retest repro upstream OK log
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:
bcachefs (loop0): resume_logged_ops... done
bcachefs (loop0): going read-write
bcachefs (loop0): done starting filesystem
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5083 at fs/bcachefs/fs-io.c:327 __bch2_truncate_folio+0x1a33/0x1d80 fs/bcachefs/fs-io.c:327
Modules linked in:
CPU: 0 PID: 5083 Comm: syz-executor322 Not tainted 6.9.0-syzkaller-10729-gb6394d6f7159 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:__bch2_truncate_folio+0x1a33/0x1d80 fs/bcachefs/fs-io.c:327
Code: 41 5f 5d c3 cc cc cc cc e8 3a 00 6f fd 48 c7 c7 fa 04 c0 8d e8 4e 1c ea ff 89 05 18 02 6a 10 e9 ed ea ff ff e8 1e 00 6f fd 90 <0f> 0b 90 e9 0a fa ff ff 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c f0
RSP: 0018:ffffc900033df6c0 EFLAGS: 00010293
RAX: ffffffff84273a52 RBX: 0000000000000000 RCX: ffff888078fb8000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900033df950 R08: ffffffff84273457 R09: 1ffffd400014f498
R10: dffffc0000000000 R11: fffff9400014f499 R12: 1ffff1100ecd900a
R13: ffff88807420075a R14: 0000000000000000 R15: ffff8880766c8050
FS:  000055555b7d5380(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f47f45440f8 CR3: 0000000077134000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bch2_truncate_folios fs/bcachefs/fs-io.c:366 [inline]
 bchfs_fpunch fs/bcachefs/fs-io.c:520 [inline]
 bch2_fallocate_dispatch+0x6fb/0x3810 fs/bcachefs/fs-io.c:785
 vfs_fallocate+0x564/0x6c0 fs/open.c:330
 ksys_fallocate fs/open.c:353 [inline]
 __do_sys_fallocate fs/open.c:361 [inline]
 __se_sys_fallocate fs/open.c:359 [inline]
 __x64_sys_fallocate+0xbd/0x110 fs/open.c:359
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f47f44c7a99
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:00007ffec1ed9828 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f47f44c7a99
RDX: 0000000000000002 RSI: 0000000000000003 RDI: 0000000000000004
RBP: 00007f47f45405f0 R08: 000055555b7d64c0 R09: 000055555b7d64c0
R10: 0000000000010000 R11: 0000000000000246 R12: 00007ffec1ed9850
R13: 00007ffec1ed9a78 R14: 431bde82d7b634db R15: 00007f47f451003b
 </TASK>

Crashes (399):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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
2025/09/08 07:31 upstream 76eeb9b8de98 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/09/08 03:03 upstream 6ab41fca2e80 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in __bch2_truncate_folio
2025/09/07 21:43 upstream 6ab41fca2e80 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in __bch2_truncate_folio
2025/09/02 04:19 upstream b320789d6883 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/08/30 07:56 upstream fb679c832b64 807a3b61 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/08/29 14:32 upstream 07d9df80082b 3e1beec6 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/08/29 13:37 upstream 07d9df80082b 3e1beec6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/08/24 09:04 upstream 8d245acc1e88 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/08/22 01:39 upstream 068a56e56fa8 3e79b825 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/08/21 19:16 upstream 32b7144f806e 0b9605c8 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in __bch2_truncate_folio
2025/08/21 01:49 upstream 41cd3fd15263 0b9605c8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/08/21 01:38 upstream 41cd3fd15263 0b9605c8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/08/20 21:39 upstream b19a97d57c15 0b9605c8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/08/20 17:58 upstream b19a97d57c15 0b9605c8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/08/20 10:57 upstream b19a97d57c15 79512909 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/08/20 09:40 upstream b19a97d57c15 79512909 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/08/20 05:30 upstream b19a97d57c15 79512909 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/08/19 08:22 upstream be48bcf004f9 523f460e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/08/18 17:29 upstream c17b750b3ad9 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/08/18 00:45 upstream 8d561baae505 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/08/17 21:15 upstream 99bade344cfa 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/08/17 08:13 upstream 90d970cade8e 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/08/17 04:53 upstream 90d970cade8e 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/08/17 01:50 upstream 90d970cade8e 1804e95e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in __bch2_truncate_folio
2025/07/28 21:57 upstream 038d61fd6422 c4a95487 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in __bch2_truncate_folio
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
2024/06/06 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
2025/09/29 03:07 upstream 8f9736633f8c 001c9061 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/09/28 05:18 upstream 51a24b7deaae 001c9061 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/09/22 17:22 upstream 07e27ad16399 770ff59f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/09/22 08:38 upstream 07e27ad16399 67c37560 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/09/18 15:21 upstream 8b789f2b7602 e2beed91 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/09/17 14:08 upstream 5aca7966d2a7 e2beed91 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/09/15 21:26 upstream f83ec76bf285 e2beed91 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/09/15 07:41 upstream 79e8447ec662 e2beed91 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/09/09 23:01 upstream 9dd1835ecda5 fdeaa69b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/09/07 20:12 upstream 6ab41fca2e80 d291dd2d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/09/03 22:28 upstream ec299e4dc21e 19216959 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/08/30 15:01 upstream 11e7861d680c 807a3b61 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/08/28 15:40 upstream 07d9df80082b bee60a83 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/08/27 22:43 upstream 39f90c196721 e12e5ba4 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/08/23 07:58 upstream 6debb6904172 bf27483f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/08/22 08:52 upstream 3957a5720157 bf27483f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/08/21 16:38 upstream 32b7144f806e 3e79b825 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/08/19 14:06 upstream be48bcf004f9 523f460e .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/08/08 15:16 upstream bec077162bd0 56444e07 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/08/06 17:51 upstream 479058002c32 4bd24a3e .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/07/29 01:01 upstream 038d61fd6422 6654ea9c .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in __bch2_truncate_folio
2025/07/28 20:03 upstream 038d61fd6422 6654ea9c .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
2025/10/04 11:21 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci bf45a62baffc 49379ee0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __bch2_truncate_folio
2025/10/04 04:28 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci bf45a62baffc 49379ee0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __bch2_truncate_folio
2025/09/22 22:06 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci b5db4add5e77 0ac7291c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __bch2_truncate_folio
2025/09/11 02:46 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci c199ef1fa61a fdeaa69b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __bch2_truncate_folio
2025/09/05 21:27 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci b320789d6883 d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __bch2_truncate_folio
2025/09/04 00:28 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8f5ae30d69d7 96a211bc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __bch2_truncate_folio
2025/08/22 11:40 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 8f5ae30d69d7 bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in __bch2_truncate_folio
2025/08/04 05:38 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 82af5ea7c611 7368264b .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.