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kernel BUG in __bch2_bkey_unpack_key

Status: upstream: reported C repro on 2025/05/27 15:15
Subsystems: bcachefs
[Documentation on labels]
Reported-by: syzbot+d78b3c996e2381acd902@syzkaller.appspotmail.com
First crash: 41d, last: 20d
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [bcachefs?] kernel BUG in __bch2_bkey_unpack_key 0 (1) 2025/05/27 15:15
▶ ▼ Last patch testing requests (1)
Created Duration User Patch Repo Result
2025/07/01 19:06 20m retest repro upstream OK log

Sample crash report:
------------[ cut here ]------------
kernel BUG at fs/bcachefs/bkey.c:272!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 6422 Comm: read_btree_node Not tainted 6.16.0-rc1-syzkaller-00004-gaef17cb3d3c4 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__bch2_bkey_unpack_key+0xdeb/0xe10 fs/bcachefs/bkey.c:272
Code: 51 d7 00 e9 f3 f9 ff ff e8 72 07 a8 fd 48 c7 c7 f0 de 75 8e 48 89 ee 4c 89 f2 e8 a0 51 d7 00 e9 2e fb ff ff e8 56 07 a8 fd 90 <0f> 0b e8 4e 07 a8 fd 90 0f 0b e8 46 07 a8 fd 90 0f 0b e8 3e 07 a8
RSP: 0018:ffffc9000e7169d8 EFLAGS: 00010293
RAX: ffffffff8418469a RBX: 0000000000000003 RCX: ffff888025599e00
RDX: 0000000000000000 RSI: 0000000000000046 RDI: 0000000000000006
RBP: 0000000000000046 R08: ffffc9000e716c6f R09: 0000000000000000
R10: ffffc9000e716c50 R11: fffff52001ce2d8e R12: ffffc9000e716c50
R13: ffff888057681028 R14: ffff8880547d90c1 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888125c86000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555adf75c8 CR3: 000000007e3c2000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __bch2_bkey_compat+0x4db/0xbd0 fs/bcachefs/bkey_methods.c:480
 bch2_bkey_compat fs/bcachefs/bkey_methods.h:134 [inline]
 validate_bset_keys+0x5b7/0x1480 fs/bcachefs/btree_io.c:983
 bch2_btree_node_read_done+0x1d3c/0x5150 fs/bcachefs/btree_io.c:1211
 btree_node_read_work+0x426/0xe30 fs/bcachefs/btree_io.c:1399
 bch2_btree_node_read+0x887/0x2a00 fs/bcachefs/btree_io.c:-1
 bch2_btree_node_fill+0xd12/0x14f0 fs/bcachefs/btree_cache.c:994
 bch2_btree_node_get_noiter+0xa2c/0x1000 fs/bcachefs/btree_cache.c:1261
 found_btree_node_is_readable fs/bcachefs/btree_node_scan.c:85 [inline]
 try_read_btree_node fs/bcachefs/btree_node_scan.c:220 [inline]
 read_btree_nodes_worker+0x1319/0x1e20 fs/bcachefs/btree_node_scan.c:269
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__bch2_bkey_unpack_key+0xdeb/0xe10 fs/bcachefs/bkey.c:272
Code: 51 d7 00 e9 f3 f9 ff ff e8 72 07 a8 fd 48 c7 c7 f0 de 75 8e 48 89 ee 4c 89 f2 e8 a0 51 d7 00 e9 2e fb ff ff e8 56 07 a8 fd 90 <0f> 0b e8 4e 07 a8 fd 90 0f 0b e8 46 07 a8 fd 90 0f 0b e8 3e 07 a8
RSP: 0018:ffffc9000e7169d8 EFLAGS: 00010293
RAX: ffffffff8418469a RBX: 0000000000000003 RCX: ffff888025599e00
RDX: 0000000000000000 RSI: 0000000000000046 RDI: 0000000000000006
RBP: 0000000000000046 R08: ffffc9000e716c6f R09: 0000000000000000
R10: ffffc9000e716c50 R11: fffff52001ce2d8e R12: ffffc9000e716c50
R13: ffff888057681028 R14: ffff8880547d90c1 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff888125c86000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe50246f98 CR3: 0000000077018000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (43):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/06/11 05:43 upstream aef17cb3d3c4 5d7e17ca .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in __bch2_bkey_unpack_key
2025/06/09 19:00 upstream 19272b37aa4f 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in __bch2_bkey_unpack_key
2025/06/02 10:11 upstream cd2e103d57e5 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in __bch2_bkey_unpack_key
2025/06/02 00:13 upstream 7d4e49a77d99 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in __bch2_bkey_unpack_key
2025/06/01 17:39 upstream 7d4e49a77d99 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs kernel BUG in __bch2_bkey_unpack_key
2025/06/15 07:31 upstream 8c6bc74c7f89 5f4b362d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/06/13 11:09 upstream 27605c8c0f69 98683f8f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/06/13 07:16 upstream 27605c8c0f69 98683f8f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/06/12 06:35 upstream 488ef3560196 98683f8f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/06/12 04:42 upstream 488ef3560196 98683f8f .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/06/11 06:08 upstream aef17cb3d3c4 5d7e17ca .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/06/10 23:44 upstream f09079bd04a9 5d7e17ca .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/06/10 21:55 upstream f09079bd04a9 5d7e17ca .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/06/10 10:54 upstream f09079bd04a9 4826c28e .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/06/10 02:30 upstream 19272b37aa4f 4826c28e .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/06/08 05:58 upstream 8630c59e9936 4826c28e .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/06/08 05:15 upstream 8630c59e9936 4826c28e .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/06/04 12:32 upstream 5abc7438f1e9 e565f08d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/06/03 14:12 upstream 546b1c9e93c2 a30356b7 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/06/03 09:58 upstream 7f9039c524a3 a30356b7 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/06/03 09:51 upstream 7f9039c524a3 a30356b7 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/06/03 07:03 upstream 7f9039c524a3 a30356b7 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/06/03 04:04 upstream 7f9039c524a3 a30356b7 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/06/02 14:08 upstream cd2e103d57e5 aaaaf5ea .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/06/02 11:49 upstream cd2e103d57e5 aaaaf5ea .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/06/01 19:44 upstream 7d4e49a77d99 3d2f584d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/06/01 09:36 upstream 4cb6c8af8591 3d2f584d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/06/01 04:23 upstream 4cb6c8af8591 3d2f584d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/05/31 22:12 upstream 0f70f5b08a47 3d2f584d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/05/31 00:43 upstream 8477ab143069 3d2f584d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/05/30 15:28 upstream f66bc387efbe 3d2f584d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/05/30 07:15 upstream e0797d3b91de 3d2f584d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/05/30 00:24 upstream e0797d3b91de 3d2f584d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/05/29 22:26 upstream e0797d3b91de 3d2f584d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/05/29 11:34 upstream 90b83efa6701 3d2f584d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/05/29 04:45 upstream feacb1774bd5 3d2f584d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/05/28 21:23 upstream feacb1774bd5 3d2f584d .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/05/28 00:22 upstream 914873bc7df9 874a1386 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/05/27 07:39 upstream ddddf9d64f73 874a1386 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/05/27 07:17 upstream ddddf9d64f73 874a1386 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in __bch2_bkey_unpack_key
2025/06/17 18:55 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 39dfc971e42d 417d98fa .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in __bch2_bkey_unpack_key
2025/06/15 19:56 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 39dfc971e42d 5f4b362d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 kernel BUG in __bch2_bkey_unpack_key
* Struck through repros no longer work on HEAD.