kernel BUG at fs/reiserfs/prints.c:LINE!

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit:    ba4f184e Linux 5.9-rc6
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=158e1fb5900000
kernel config:  https://syzkaller.appspot.com/x/.config?x=5f4c828c9e3cef97
dashboard link: https://syzkaller.appspot.com/bug?extid=1541a3226994c0781b29
compiler:       gcc (GCC) 10.1.0-syz 20200507

Unfortunately, I don't have any reproducer for this issue yet.

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+1541a3226994c0781b29@xxxxxxxxxxxxxxxxxxxxxxxxx

REISERFS panic (device loop5): journal-2332 do_journal_end: Trying to log block 8211, which is a log block
------------[ cut here ]------------
kernel BUG at fs/reiserfs/prints.c:390!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 6886 Comm: syz-executor.5 Not tainted 5.9.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__reiserfs_panic.cold+0x37/0x8a fs/reiserfs/prints.c:390
Code: 9c 88 74 6d e8 4f 9a 7a ff 4c 89 e9 4c 89 f2 4c 89 e6 49 c7 c0 20 32 4f 8d 48 c7 c7 e0 b4 9c 88 e8 32 a3 63 ff e8 2e 9a 7a ff <0f> 0b e8 27 9a 7a ff 4d 85 e4 49 c7 c6 20 b3 9c 88 75 0a 49 c7 c6
RSP: 0018:ffffc900057c7b00 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88804d17e000 RCX: 0000000000000000
RDX: ffff888057f3e140 RSI: ffffffff81fba412 RDI: fffff52000af8f52
RBP: ffffc900057c7bd0 R08: 000000000000006a R09: ffff8880ae5318e7
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff889d1b20
R13: ffffffff889d2320 R14: ffffffff889cb320 R15: 0000000000002015
FS:  00000000023b5940(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbc9e331db8 CR3: 00000000966ca000 CR4: 00000000001526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_journal_end+0x3d85/0x4950 fs/reiserfs/journal.c:4135
 reiserfs_sync_fs+0xf8/0x120 fs/reiserfs/super.c:78
 __sync_filesystem fs/sync.c:39 [inline]
 sync_filesystem fs/sync.c:64 [inline]
 sync_filesystem+0x105/0x260 fs/sync.c:48
 generic_shutdown_super+0x70/0x370 fs/super.c:448
 kill_block_super+0x97/0xf0 fs/super.c:1444
 deactivate_locked_super+0x94/0x160 fs/super.c:335
 deactivate_super+0xad/0xd0 fs/super.c:366
 cleanup_mnt+0x3a3/0x530 fs/namespace.c:1118
 task_work_run+0xdd/0x190 kernel/task_work.c:141
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:165 [inline]
 exit_to_user_mode_prepare+0x1e1/0x200 kernel/entry/common.c:192
 syscall_exit_to_user_mode+0x7e/0x2e0 kernel/entry/common.c:267
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x460027
Code: 64 89 04 25 d0 02 00 00 58 5f ff d0 48 89 c7 e8 2f be ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 fd 89 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffccf055678 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000460027
RDX: 0000000000403188 RSI: 0000000000000002 RDI: 00007ffccf055720
RBP: 0000000000000949 R08: 0000000000000000 R09: 000000000000000b
R10: 0000000000000005 R11: 0000000000000246 R12: 00007ffccf0567b0
R13: 00000000023b6a60 R14: 0000000000000000 R15: 00007ffccf0567b0
Modules linked in:
---[ end trace 3c2c809ae25fc32e ]---
RIP: 0010:__reiserfs_panic.cold+0x37/0x8a fs/reiserfs/prints.c:390
Code: 9c 88 74 6d e8 4f 9a 7a ff 4c 89 e9 4c 89 f2 4c 89 e6 49 c7 c0 20 32 4f 8d 48 c7 c7 e0 b4 9c 88 e8 32 a3 63 ff e8 2e 9a 7a ff <0f> 0b e8 27 9a 7a ff 4d 85 e4 49 c7 c6 20 b3 9c 88 75 0a 49 c7 c6
RSP: 0018:ffffc900057c7b00 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88804d17e000 RCX: 0000000000000000
RDX: ffff888057f3e140 RSI: ffffffff81fba412 RDI: fffff52000af8f52
RBP: ffffc900057c7bd0 R08: 000000000000006a R09: ffff8880ae5318e7
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff889d1b20
R13: ffffffff889d2320 R14: ffffffff889cb320 R15: 0000000000002015
FS:  00000000023b5940(0000) GS:ffff8880ae500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000748698 CR3: 00000000966ca000 CR4: 00000000001526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


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