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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: 546d, last: 46d
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
  
Fix bisection: fixed by (bisect log) :
commit 2744e5c9eb1a1090b5f61c955e934c70bfe6b04c
Author: Kent Overstreet <kent.overstreet@linux.dev>
Date: Wed Dec 27 23:31:46 2023 +0000

  bcachefs: KEY_TYPE_accounting

  
▶ ▼ Discussions (7)
Title Replies (including bot) Last reply
[syzbot] [bcachefs?] WARNING in __bch2_truncate_folio 0 (2) 2025/11/11 09:31
[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
▶ ▼ 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 (2)
Created Duration User Patch Repo Result
2025/11/11 03:20 6h10m bisect fix upstream OK (1) job log
2025/06/22 14:09 2h07m bisect fix upstream OK (0) job log log

Sample crash report:
bcachefs (loop0): journal_replay... done
bcachefs (loop0): resume_logged_ops... done
bcachefs (loop0): going read-write
bcachefs (loop0): done starting filesystem
------------[ cut here ]------------
WARNING: CPU: 0 PID: 6372 at fs/bcachefs/fs-io.c:327 __bch2_truncate_folio+0x1600/0x1904 fs/bcachefs/fs-io.c:327
Modules linked in:
CPU: 0 PID: 6372 Comm: syz-executor349 Not tainted 6.10.0-rc7-syzkaller-gc912bf709078 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : __bch2_truncate_folio+0x1600/0x1904 fs/bcachefs/fs-io.c:327
lr : __bch2_truncate_folio+0x1600/0x1904 fs/bcachefs/fs-io.c:327
sp : ffff8000a12b6f00
x29: ffff8000a12b7160 x28: ffff700014256df4 x27: ffff8000a12b70d0
x26: 1fffe0001ba700eb x25: dfff800000000000 x24: 1fffe0001be550f7
x23: ffff0000df2a8768 x22: 0000000000000000 x21: 0000000000000000
x20: ffff0000df2a87b8 x19: 1ffff00014256e1a x18: ffff8000a12b67a0
x17: 000000000000d29d x16: ffff80008b07c280 x15: 000000000000000d
x14: 1ffff00014256db4 x13: 0000000000000000 x12: 0000000000000000
x11: ffff700014256dc1 x10: 0000000000ff0100 x9 : 0000000000000000
x8 : ffff0000daebdac0 x7 : 0000000000000000 x6 : 000000000000003f
x5 : 0000000000000040 x4 : 0000000000000000 x3 : 0000000000000020
x2 : 0000000000000008 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 __bch2_truncate_folio+0x1600/0x1904 fs/bcachefs/fs-io.c:327
 bch2_truncate_folios fs/bcachefs/fs-io.c:366 [inline]
 bchfs_fpunch fs/bcachefs/fs-io.c:520 [inline]
 bch2_fallocate_dispatch+0x6dc/0x2d50 fs/bcachefs/fs-io.c:785
 vfs_fallocate+0x480/0x5bc fs/open.c:330
 ioctl_preallocate+0x21c/0x2a0 fs/ioctl.c:291
 do_vfs_ioctl+0x1b88/0x2404 fs/ioctl.c:886
 __do_sys_ioctl fs/ioctl.c:905 [inline]
 __se_sys_ioctl fs/ioctl.c:893 [inline]
 __arm64_sys_ioctl+0xe4/0x1c8 fs/ioctl.c:893
 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:131
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:150
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598
irq event stamp: 67824
hardirqs last  enabled at (67823): [<ffff800080a5499c>] kasan_quarantine_put+0x1a0/0x1c8 mm/kasan/quarantine.c:234
hardirqs last disabled at (67824): [<ffff80008b13d724>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:470
softirqs last  enabled at (67200): [<ffff80008003067c>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (67198): [<ffff800080030648>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---

Crashes (399):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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
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
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.