ci2 starts bisection 2023-03-03 21:01:26.567759785 +0000 UTC m=+175901.506449131 bisecting fixing commit since 69b41ac87e4a664de78a395ff97166f0b2943210 building syzkaller on f0036e181e274023235289be91e334cb7507eaa6 ensuring issue is reproducible on original commit 69b41ac87e4a664de78a395ff97166f0b2943210 testing commit 69b41ac87e4a664de78a395ff97166f0b2943210 gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 71ffc1b4cad4a0fa380db80d7417e6f7caaa1d4d3faefb13616d3398eaecf020 all runs: crashed: divide error in do_journal_end testing current HEAD 0a3f9a6b0265b64c02226fcabb5e9a958307913b testing commit 0a3f9a6b0265b64c02226fcabb5e9a958307913b gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 28bf8292848485c3e515ae4eb9c4e506f156da07a8cf158027dcf3cbd3c8e483 all runs: crashed: divide error in do_journal_end revisions tested: 2, total time: 39m53.822321737s (build: 31m34.666299803s, test: 6m25.214404366s) the crash still happens on HEAD commit msg: Merge tag 'thermal-6.3-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm crash: divide error in do_journal_end divide error: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 5501 Comm: syz-executor.0 Not tainted 6.2.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 RIP: 0010:do_journal_end+0x12dc/0x4290 Code: 30 84 c0 0f 85 6f 2a 00 00 4d 8d 64 1c 01 4c 89 e8 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 76 2a 00 00 41 8b 0f 4c 89 e0 31 d2 <48> f7 f1 48 89 d3 48 03 5c 24 20 48 8b 84 24 c8 00 00 00 42 80 3c RSP: 0018:ffffc9000475f980 EFLAGS: 00010246 RAX: 0000000000000003 RBX: 0000000000000002 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88807301e000 RBP: ffffc9000475fbf0 R08: dffffc0000000000 R09: ffff88807301d000 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000003 R13: ffff88806fcbb017 R14: dffffc0000000000 R15: ffff88806fcbb014 FS: 00005555555ee400(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffca81ceff4 CR3: 00000000733fe000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: reiserfs_sync_fs+0xa3/0x100 sync_filesystem+0xc8/0x190 generic_shutdown_super+0x69/0x2d0 kill_block_super+0x79/0xc0 deactivate_locked_super+0x75/0xd0 cleanup_mnt+0x3af/0x430 task_work_run+0x20a/0x290 exit_to_user_mode_loop+0xd1/0xf0 exit_to_user_mode_prepare+0xb1/0x140 syscall_exit_to_user_mode+0x54/0x2d0 do_syscall_64+0x4d/0xc0 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fde8368d517 Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 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:00007ffca81cf748 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fde8368d517 RDX: 00007ffca81cf817 RSI: 000000000000000a RDI: 00007ffca81cf810 RBP: 00007ffca81cf810 R08: 00000000ffffffff R09: 00007ffca81cf5e0 R10: 00005555555ef903 R11: 0000000000000246 R12: 00007fde836e6b24 R13: 00007ffca81d08d0 R14: 00005555555ef810 R15: 00007ffca81d0910 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:do_journal_end+0x12dc/0x4290 Code: 30 84 c0 0f 85 6f 2a 00 00 4d 8d 64 1c 01 4c 89 e8 48 c1 e8 03 42 0f b6 04 30 84 c0 0f 85 76 2a 00 00 41 8b 0f 4c 89 e0 31 d2 <48> f7 f1 48 89 d3 48 03 5c 24 20 48 8b 84 24 c8 00 00 00 42 80 3c RSP: 0018:ffffc9000475f980 EFLAGS: 00010246 RAX: 0000000000000003 RBX: 0000000000000002 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88807301e000 RBP: ffffc9000475fbf0 R08: dffffc0000000000 R09: ffff88807301d000 R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000003 R13: ffff88806fcbb017 R14: dffffc0000000000 R15: ffff88806fcbb014 FS: 00005555555ee400(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055bfda083680 CR3: 00000000733fe000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 30 84 c0 0f 85 6f 2a xor %al,0x2a6f850f(%rax,%rax,8) 7: 00 00 add %al,(%rax) 9: 4d 8d 64 1c 01 lea 0x1(%r12,%rbx,1),%r12 e: 4c 89 e8 mov %r13,%rax 11: 48 c1 e8 03 shr $0x3,%rax 15: 42 0f b6 04 30 movzbl (%rax,%r14,1),%eax 1a: 84 c0 test %al,%al 1c: 0f 85 76 2a 00 00 jne 0x2a98 22: 41 8b 0f mov (%r15),%ecx 25: 4c 89 e0 mov %r12,%rax 28: 31 d2 xor %edx,%edx * 2a: 48 f7 f1 div %rcx <-- trapping instruction 2d: 48 89 d3 mov %rdx,%rbx 30: 48 03 5c 24 20 add 0x20(%rsp),%rbx 35: 48 8b 84 24 c8 00 00 mov 0xc8(%rsp),%rax 3c: 00 3d: 42 rex.X 3e: 80 .byte 0x80 3f: 3c .byte 0x3c