Hello, syzbot found the following issue on: HEAD commit: a5806cd506af Linux 6.15-rc7 git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=131bde70580000 kernel config: https://syzkaller.appspot.com/x/.config?x=a1de0d8596cea805 dashboard link: https://syzkaller.appspot.com/bug?extid=a8f903ba15921696861d compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16bb32d4580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=142351f4580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/d72f8f4a220d/disk-a5806cd5.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6567d0e5a4d8/vmlinux-a5806cd5.xz kernel image: https://storage.googleapis.com/syzbot-assets/66e79750c483/bzImage-a5806cd5.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/7fdb68bab5ea/mount_0.gz The issue was bisected to: commit f5095b9f85a1674a92d00e7ab466499a8ba49ce1 Author: Kent Overstreet <kent.overstreet@xxxxxxxxx> Date: Tue Jan 2 00:42:37 2024 +0000 bcachefs: dev_usage updated by new accounting bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=14897e70580000 final oops: https://syzkaller.appspot.com/x/report.txt?x=16897e70580000 console output: https://syzkaller.appspot.com/x/log.txt?x=12897e70580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a8f903ba15921696861d@xxxxxxxxxxxxxxxxxxxxxxxxx Fixes: f5095b9f85a1 ("bcachefs: dev_usage updated by new accounting") ------------[ cut here ]------------ kernel BUG at block/blk-mq.c:1146! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 15 Comm: ksoftirqd/0 Not tainted 6.15.0-rc7-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:blk_mq_end_request+0x6c/0x70 block/blk-mq.c:1146 Code: e8 79 f1 2b fd 48 89 df 89 ee 5b 5d e9 bd f9 ff ff 89 f9 80 e1 07 80 c1 03 38 c1 7c ce e8 ec c5 8b fd eb c7 e8 55 f1 2b fd 90 <0f> 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f RSP: 0018:ffffc90000147bb8 EFLAGS: 00010246 RAX: ffffffff8493ff8b RBX: ffff8880242d1200 RCX: ffff88801c6d3c00 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffff88801c6d3c00 R09: 0000000000000003 R10: 0000000000000009 R11: 0000000000000100 R12: dffffc0000000000 R13: 0000000000000005 R14: ffff8880242d1200 R15: ffffffff8be81688 FS: 0000000000000000(0000) GS:ffff8881260f6000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000007cdd8000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> blk_complete_reqs block/blk-mq.c:1220 [inline] blk_done_softirq+0x10a/0x160 block/blk-mq.c:1225 handle_softirqs+0x283/0x870 kernel/softirq.c:579 run_ksoftirqd+0x9b/0x100 kernel/softirq.c:968 smpboot_thread_fn+0x53f/0xa60 kernel/smpboot.c:164 kthread+0x711/0x8a0 kernel/kthread.c:464 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:blk_mq_end_request+0x6c/0x70 block/blk-mq.c:1146 Code: e8 79 f1 2b fd 48 89 df 89 ee 5b 5d e9 bd f9 ff ff 89 f9 80 e1 07 80 c1 03 38 c1 7c ce e8 ec c5 8b fd eb c7 e8 55 f1 2b fd 90 <0f> 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f RSP: 0018:ffffc90000147bb8 EFLAGS: 00010246 RAX: ffffffff8493ff8b RBX: ffff8880242d1200 RCX: ffff88801c6d3c00 RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffff88801c6d3c00 R09: 0000000000000003 R10: 0000000000000009 R11: 0000000000000100 R12: dffffc0000000000 R13: 0000000000000005 R14: ffff8880242d1200 R15: ffffffff8be81688 FS: 0000000000000000(0000) GS:ffff8881260f6000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000007cdd8000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
