syzbot

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kernel BUG at fs/bcachefs/btree_journal_iter.c:83!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 0 UID: 0 PID: 8057 Comm: syz-executor165 Not tainted 6.14.0-rc4-syzkaller-00073-g5394eea10651 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:bch2_journal_keys_peek_max+0x164f/0x1660 fs/bcachefs/btree_journal_iter.c:83
Code: 10 48 8d 5c 08 18 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 0f 78 d9 fd 4c 8b 33 e9 d7 fe ff ff e8 22 c5 74 fd 90 <0f> 0b e8 9a 94 b3 07 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90
RSP: 0018:ffffc900035a6620 EFLAGS: 00010293
RAX: ffffffff844cf87e RBX: 0000000000000039 RCX: ffff888025481e00
RDX: 0000000000000000 RSI: 0000000000000039 RDI: ffffffffffffffff
RBP: ffffc900035a67e0 R08: ffffffff844ce375 R09: 0000000000000000
R10: 00000001ffffffff R11: 2000000000000000 R12: dffffc0000000000
R13: ffff88805ef00000 R14: ffffffffffffffff R15: ffffc900035a7018
FS:  00005555819eb480(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000002d984000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bch2_btree_journal_peek fs/bcachefs/btree_iter.c:2137 [inline]
 btree_trans_peek_journal+0x342/0x5a0 fs/bcachefs/btree_iter.c:2166
 __bch2_btree_iter_peek fs/bcachefs/btree_iter.c:2303 [inline]
 bch2_btree_iter_peek_max+0x1502/0x6320 fs/bcachefs/btree_iter.c:2373
 bch2_btree_iter_peek_slot+0xe0a/0x27c0 fs/bcachefs/btree_iter.c:2838
 bch2_btree_iter_peek_prev_min+0x1f3/0x6390 fs/bcachefs/btree_iter.c:2612
 __bch2_resume_logged_op_finsert+0xd5f/0x36b0 fs/bcachefs/io_misc.c:431
 bch2_fcollapse_finsert+0x286/0x3b0 fs/bcachefs/io_misc.c:535
 bchfs_fcollapse_finsert+0x3a8/0x630 fs/bcachefs/fs-io.c:594
 bch2_fallocate_dispatch+0x3c9/0x540
 vfs_fallocate+0x623/0x7a0 fs/open.c:338
 ksys_fallocate fs/open.c:362 [inline]
 __do_sys_fallocate fs/open.c:367 [inline]
 __se_sys_fallocate fs/open.c:365 [inline]
 __x64_sys_fallocate+0xbc/0x110 fs/open.c:365
 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: 0033:0x7f0ef3bf2789
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 1c 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:00007ffd1b0b4ca8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f0ef3bf2789
RDX: 0000000000000000 RSI: 0000000000000020 RDI: 0000000000000004
RBP: 0000000000000000 R08: 00007ffd1b0b4cdc R09: 00007ffd1b0b4cdc
R10: 0000000000008000 R11: 0000000000000246 R12: 00007ffd1b0b4cdc
R13: 0000000000000036 R14: 431bde82d7b634db R15: 00007ffd1b0b4d10
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:bch2_journal_keys_peek_max+0x164f/0x1660 fs/bcachefs/btree_journal_iter.c:83
Code: 10 48 8d 5c 08 18 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 0f 78 d9 fd 4c 8b 33 e9 d7 fe ff ff e8 22 c5 74 fd 90 <0f> 0b e8 9a 94 b3 07 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90
RSP: 0018:ffffc900035a6620 EFLAGS: 00010293
RAX: ffffffff844cf87e RBX: 0000000000000039 RCX: ffff888025481e00
RDX: 0000000000000000 RSI: 0000000000000039 RDI: ffffffffffffffff
RBP: ffffc900035a67e0 R08: ffffffff844ce375 R09: 0000000000000000
R10: 00000001ffffffff R11: 2000000000000000 R12: dffffc0000000000
R13: ffff88805ef00000 R14: ffffffffffffffff R15: ffffc900035a7018
FS:  00005555819eb480(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000002d984000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400