syzbot


WARNING in bch2_trans_put

Status: upstream: reported C repro on 2024/05/17 03:31
Subsystems: bcachefs
[Documentation on labels]
Reported-by: syzbot+291aef749c5cbb9ca2fd@syzkaller.appspotmail.com
First crash: 363d, last: 7h40m
Cause bisection: introduced by (bisect log) :
commit bcf77a05fb3d6210026483703bcacb22ed961c99
Author: Kent Overstreet <kent.overstreet@linux.dev>
Date: Fri Nov 8 05:25:18 2024 +0000

  bcachefs: Fix hidden btree errors when reading roots

Crash: WARNING in bch2_trans_put (log)
Repro: C syz .config
  
Discussions (6)
Title Replies (including bot) Last reply
[syzbot] Monthly bcachefs report (Apr 2025) 0 (1) 2025/04/22 12:41
[syzbot] [bcachefs?] WARNING in bch2_trans_put 0 (3) 2024/12/22 02:31
[syzbot] Monthly bcachefs report (Oct 2024) 0 (1) 2024/10/14 19:38
[syzbot] Monthly bcachefs report (Sep 2024) 0 (1) 2024/09/13 10:03
[syzbot] Monthly bcachefs report (Aug 2024) 0 (1) 2024/08/13 08:53
[syzbot] Monthly bcachefs report (Jul 2024) 0 (1) 2024/07/12 12:53

Sample crash report:
bcachefs (loop0): btree_node_read_work: rewriting btree node at btree=extents level=0 SPOS_MAX due to error
------------[ cut here ]------------
btree trans held srcu lock (delaying memory reclaim) for 11 seconds
WARNING: CPU: 1 PID: 5823 at fs/bcachefs/btree_iter.c:3030 check_srcu_held_too_long fs/bcachefs/btree_iter.c:3028 [inline]
WARNING: CPU: 1 PID: 5823 at fs/bcachefs/btree_iter.c:3030 bch2_trans_put+0xd45/0xf00 fs/bcachefs/btree_iter.c:3274
Modules linked in:
CPU: 1 UID: 0 PID: 5823 Comm: syz-executor422 Not tainted 6.13.0-rc3-syzkaller-00193-ge9b8ffafd20a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:check_srcu_held_too_long fs/bcachefs/btree_iter.c:3028 [inline]
RIP: 0010:bch2_trans_put+0xd45/0xf00 fs/bcachefs/btree_iter.c:3274
Code: 1c 24 48 c1 eb 02 48 b9 c3 f5 28 5c 8f c2 f5 28 48 89 d8 48 f7 e1 48 c1 ea 02 48 c7 c7 40 28 51 8c 48 89 d6 e8 5c 4e 42 fd 90 <0f> 0b 90 90 e9 af f8 ff ff e8 1d ab 81 fd 90 0f 0b 90 e9 f2 f8 ff
RSP: 0018:ffffc90003f3f300 EFLAGS: 00010246
RAX: daf39d7b7a91ab00 RBX: 0000000000000113 RCX: ffff88802414bc00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: dffffc0000000000 R08: ffffffff81601962 R09: 1ffff920007e7dfc
R10: dffffc0000000000 R11: fffff520007e7dfd R12: ffff888029d10070
R13: 1ffff110053a200e R14: ffff888029d10042 R15: 1ffff110053a2008
FS:  0000555580eef380(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f95f5c24990 CR3: 0000000076fc2000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bch2_btree_root_read+0x6d6/0x7a0 fs/bcachefs/btree_io.c:1771
 read_btree_roots+0x296/0x840 fs/bcachefs/recovery.c:523
 bch2_fs_recovery+0x2585/0x39d0 fs/bcachefs/recovery.c:853
 bch2_fs_start+0x356/0x5b0 fs/bcachefs/super.c:1037
 bch2_fs_get_tree+0xd68/0x1710 fs/bcachefs/fs.c:2170
 vfs_get_tree+0x90/0x2b0 fs/super.c:1814
 do_new_mount+0x2be/0xb40 fs/namespace.c:3507
 do_mount fs/namespace.c:3847 [inline]
 __do_sys_mount fs/namespace.c:4057 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4034
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f95f5bf2eda
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007ffd6fea95b8 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffd6fea95c0 RCX: 00007f95f5bf2eda
RDX: 00000000200058c0 RSI: 0000000020005900 RDI: 00007ffd6fea95c0
RBP: 0000000000000004 R08: 00007ffd6fea9600 R09: 00000000000058fe
R10: 0000000000000001 R11: 0000000000000282 R12: 00007ffd6fea9600
R13: 0000000000000003 R14: 0000000001000000 R15: 00007f95f5c3a03b
 </TASK>

Crashes (416):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/12/21 10:18 upstream e9b8ffafd20a d7f584ee .config strace log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs WARNING in bch2_trans_put
2025/05/09 16:23 upstream 9c69f8884904 77908e5f .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs WARNING in bch2_trans_put
2025/05/11 19:37 upstream 3ce9925823c7 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/05/11 05:06 upstream bec6f00f120e 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in bch2_trans_put
2025/05/10 16:34 upstream 0e1329d4045c 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/05/10 13:09 upstream 3013c33dcbd9 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in bch2_trans_put
2025/05/07 21:18 upstream 707df3375124 350f4ffc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in bch2_trans_put
2025/05/06 17:52 upstream 01f95500a162 ae98e6b9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in bch2_trans_put
2025/05/06 07:09 upstream 01f95500a162 ae98e6b9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in bch2_trans_put
2025/05/04 06:53 upstream 2a239ffbebb5 b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/05/04 04:56 upstream 2a239ffbebb5 b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/05/02 23:56 upstream 2bfcee565c3a b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/05/01 15:45 upstream 4f79eaa2ceac 51b137cd .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/04/30 13:59 upstream b6ea1680d0ac 85a5a23f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/04/30 11:57 upstream b6ea1680d0ac 85a5a23f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/04/29 10:22 upstream ca91b9500108 aeb6ec69 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/04/29 05:31 upstream f15d97df5afa aeb6ec69 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/04/27 17:26 upstream 5bc1018675ec c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/04/26 17:31 upstream f1a3944c860b c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/04/26 14:05 upstream f1a3944c860b c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in bch2_trans_put
2025/04/26 00:48 upstream 02ddfb981de8 c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/04/25 22:30 upstream 02ddfb981de8 c6b4fb39 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/04/24 22:28 upstream e72e9e693307 9882047a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/04/24 05:08 upstream a79be02bba5c 73a168d0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/04/24 03:56 upstream a79be02bba5c 73a168d0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/04/23 21:01 upstream a79be02bba5c 73a168d0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/04/22 19:42 upstream a33b5a08cbbd 53a8b9bd .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/04/20 09:28 upstream 119009db2674 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/04/20 04:03 upstream 8560697b23dc 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in bch2_trans_put
2025/04/19 03:58 upstream 3088d26962e8 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/04/18 06:26 upstream b5c6891b2c5b 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/04/17 01:25 upstream c62f4b82d571 a95239b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/04/16 01:24 upstream 1a1d569a75f3 a95239b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/04/15 22:11 upstream 1a1d569a75f3 23b969b7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/04/15 09:17 upstream 834a4a689699 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/04/15 03:53 upstream 834a4a689699 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/04/12 04:35 upstream e618ee89561b 0bd6db41 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/04/09 16:43 upstream a24588245776 47d015b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/04/09 14:36 upstream a24588245776 47d015b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/04/08 11:33 upstream 0af2f6be1b42 a775275d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/04/06 16:41 upstream f4d2ef48250a 1c65791e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/04/06 09:27 upstream f4d2ef48250a 1c65791e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/04/05 23:39 upstream a8662bcd2ff1 1c65791e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in bch2_trans_put
2025/04/05 07:04 upstream a52a3c18cdf3 c53ea9c9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in bch2_trans_put
2025/04/02 06:20 upstream acc4d5ff0b61 c799dfdd .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in bch2_trans_put
2024/06/24 11:32 upstream f2661062f16b edc5149a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in bch2_trans_put
2024/06/21 18:46 upstream 50736169ecc8 dac2aa43 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in bch2_trans_put
2024/05/13 03:29 upstream ba16c1cf11c9 9026e142 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-smack-root WARNING in bch2_trans_put
2025/04/12 01:40 linux-next 01c6df60d5d4 12ba9c21 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in bch2_trans_put
2025/04/04 10:23 linux-next a4cda136f021 d7ae3a11 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in bch2_trans_put
2025/05/06 01:46 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci e0f4c8dd9d2d ae98e6b9 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in bch2_trans_put
2025/05/03 08:21 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci e0f4c8dd9d2d b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in bch2_trans_put
2025/04/20 17:53 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci c72692105976 2a20f901 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in bch2_trans_put
2025/04/17 14:50 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci c72692105976 2a6ededb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in bch2_trans_put
2025/04/03 22:26 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_trans_put
* Struck through repros no longer work on HEAD.