Hello, syzbot found the following issue on: HEAD commit: 88b06399 Merge tag 'for-5.13-rc1-part2-tag' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13516d93d00000 kernel config: https://syzkaller.appspot.com/x/.config?x=807beec6b4d66bf1 dashboard link: https://syzkaller.appspot.com/bug?extid=0ba9909df31c6a36974d syz repro: https://syzkaller.appspot.com/x/repro.syz?x=123b4d63d00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16813c65d00000 Bisection is inconclusive: the issue happens on the oldest tested release. bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=11e35795d00000 final oops: https://syzkaller.appspot.com/x/report.txt?x=13e35795d00000 console output: https://syzkaller.appspot.com/x/log.txt?x=15e35795d00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+0ba9909df31c6a36974d@xxxxxxxxxxxxxxxxxxxxxxxxx REISERFS (device loop0): journal params: device loop0, size 8192, journal first block 10, max trans len 1024, max batch 900, max commit age 30, max trans age 30 REISERFS (device loop0): checking transaction log (loop0) REISERFS (device loop0): Using r5 hash to sort names REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage. divide error: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 8393 Comm: syz-executor119 Not tainted 5.13.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:do_journal_end+0x24aa/0x4950 fs/reiserfs/journal.c:4188 Code: c1 45 84 ca 0f 85 67 18 00 00 83 e2 07 40 38 d6 41 0f 9e c1 40 84 f6 0f 95 c2 41 84 d1 0f 85 4e 18 00 00 41 8b 7c 24 14 31 d2 <48> f7 f7 49 8d 7d 18 48 8d 34 0a 48 89 f8 48 c1 e8 03 80 3c 18 00 RSP: 0018:ffffc9000187faa0 EFLAGS: 00010246 RAX: 0000000000000005 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900016c1048 R08: 0000000000001000 R09: 0000000000000001 R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880349b1000 R13: ffff8880285b9000 R14: ffff88801248d4c0 R15: ffff888019b28000 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055cf21e91b70 CR3: 0000000013782000 CR4: 0000000000350ef0 Call Trace: reiserfs_sync_fs+0xf8/0x120 fs/reiserfs/super.c:78 __sync_filesystem fs/sync.c:39 [inline] sync_filesystem fs/sync.c:67 [inline] sync_filesystem+0x1b5/0x260 fs/sync.c:48 generic_shutdown_super+0x70/0x370 fs/super.c:448 kill_block_super+0x97/0xf0 fs/super.c:1395 deactivate_locked_super+0x94/0x160 fs/super.c:335 deactivate_super+0xad/0xd0 fs/super.c:366 cleanup_mnt+0x3a2/0x540 fs/namespace.c:1136 task_work_run+0xdd/0x1a0 kernel/task_work.c:164 exit_task_work include/linux/task_work.h:32 [inline] do_exit+0xbfc/0x2a60 kernel/exit.c:826 do_group_exit+0x125/0x310 kernel/exit.c:923 __do_sys_exit_group kernel/exit.c:934 [inline] __se_sys_exit_group kernel/exit.c:932 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:932 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4438c9 Code: Unable to access opcode bytes at RIP 0x44389f. RSP: 002b:00007ffe1e8a33f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00000000004b52f0 RCX: 00000000004438c9 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001 RBP: 0000000000000001 R08: ffffffffffffffc4 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004b52f0 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 Modules linked in: ---[ end trace 918df66ba4209fe1 ]--- RIP: 0010:do_journal_end+0x24aa/0x4950 fs/reiserfs/journal.c:4188 Code: c1 45 84 ca 0f 85 67 18 00 00 83 e2 07 40 38 d6 41 0f 9e c1 40 84 f6 0f 95 c2 41 84 d1 0f 85 4e 18 00 00 41 8b 7c 24 14 31 d2 <48> f7 f7 49 8d 7d 18 48 8d 34 0a 48 89 f8 48 c1 e8 03 80 3c 18 00 RSP: 0018:ffffc9000187faa0 EFLAGS: 00010246 RAX: 0000000000000005 RBX: dffffc0000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900016c1048 R08: 0000000000001000 R09: 0000000000000001 R10: 0000000000000001 R11: 0000000000000000 R12: ffff8880349b1000 R13: ffff8880285b9000 R14: ffff88801248d4c0 R15: ffff888019b28000 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055cf21e91b70 CR3: 00000000133f2000 CR4: 0000000000350ef0 --- 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 syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
