gfs2: fsid=syz:syz.0: fatal: I/O error - block = 8589934917, function = gfs2_ail1_empty_one, file = fs/gfs2/log.c, line = 326
CPU: 0 UID: 0 PID: 5337 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 gfs2_withdraw+0xc3/0x1b0 fs/gfs2/util.c:250
 gfs2_ail1_empty_one fs/gfs2/log.c:326 [inline]
 gfs2_ail1_empty+0x2ba/0x7c0 fs/gfs2/log.c:360
 gfs2_flush_revokes+0x5c/0x80 fs/gfs2/log.c:804
 revoke_lo_before_commit+0x2f/0xe60 fs/gfs2/lops.c:853
 lops_before_commit fs/gfs2/lops.h:42 [inline]
 gfs2_log_flush+0xa48/0x24c0 fs/gfs2/log.c:1095
 gfs2_kill_sb+0x5c/0x430 fs/gfs2/ops_fstype.c:1779
 deactivate_locked_super+0xbc/0x130 fs/super.c:474
 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1318
 task_work_run+0x1d4/0x260 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x6c5/0x2310 kernel/exit.c:971
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1112
 __do_sys_exit_group kernel/exit.c:1123 [inline]
 __se_sys_exit_group kernel/exit.c:1121 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1121
 x64_sys_call+0x2210/0x2210 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6e26b8f7c9
Code: Unable to access opcode bytes at 0x7f6e26b8f79f.
RSP: 002b:00007fff60392ce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f6e26b8f7c9
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000003 R08: 0000001560392ddf R09: 00007f6e26db4280
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6e26db4280 R14: 0000000000000003 R15: 00007fff60392da0
 </TASK>
gfs2: fsid=syz:syz.0: about to withdraw this file system
------------[ cut here ]------------
kernel BUG at fs/gfs2/super.c:76!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5337 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:gfs2_jindex_free+0x43e/0x440 fs/gfs2/super.c:76
Code: 58 09 57 07 cc 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c ea fd ff ff e8 72 bb 20 fe e9 e0 fd ff ff e8 58 1e 54 07 e8 23 de b8 fd 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6
RSP: 0018:ffffc9000d34fa40 EFLAGS: 00010293
RAX: ffffffff8408e22d RBX: dead000000000122 RCX: ffff8880003fc980
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 00000000ffffffff
RBP: ffffc9000d34fb00 R08: ffff888042360e37 R09: 1ffff1100846c1c6
R10: dffffc0000000000 R11: ffffed100846c1c7 R12: ffff888042360908
R13: dffffc0000000000 R14: ffff88803337ce00 R15: ffff88803337ce78
FS:  0000000000000000(0000) GS:ffff88808d22f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffce4156360 CR3: 0000000011bab000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 gfs2_put_super+0x7d9/0x860 fs/gfs2/super.c:636
 generic_shutdown_super+0x135/0x2c0 fs/super.c:643
 kill_block_super+0x44/0x90 fs/super.c:1722
 deactivate_locked_super+0xbc/0x130 fs/super.c:474
 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1318
 task_work_run+0x1d4/0x260 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x6c5/0x2310 kernel/exit.c:971
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1112
 __do_sys_exit_group kernel/exit.c:1123 [inline]
 __se_sys_exit_group kernel/exit.c:1121 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1121
 x64_sys_call+0x2210/0x2210 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6e26b8f7c9
Code: Unable to access opcode bytes at 0x7f6e26b8f79f.
RSP: 002b:00007fff60392ce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f6e26b8f7c9
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000003 R08: 0000001560392ddf R09: 00007f6e26db4280
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6e26db4280 R14: 0000000000000003 R15: 00007fff60392da0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:gfs2_jindex_free+0x43e/0x440 fs/gfs2/super.c:76
Code: 58 09 57 07 cc 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c ea fd ff ff e8 72 bb 20 fe e9 e0 fd ff ff e8 58 1e 54 07 e8 23 de b8 fd 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6
RSP: 0018:ffffc9000d34fa40 EFLAGS: 00010293
RAX: ffffffff8408e22d RBX: dead000000000122 RCX: ffff8880003fc980
RDX: 0000000000000000 RSI: 0000000000000008 RDI: 00000000ffffffff
RBP: ffffc9000d34fb00 R08: ffff888042360e37 R09: 1ffff1100846c1c6
R10: dffffc0000000000 R11: ffffed100846c1c7 R12: ffff888042360908
R13: dffffc0000000000 R14: ffff88803337ce00 R15: ffff88803337ce78
FS:  0000000000000000(0000) GS:ffff88808d22f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffce4156360 CR3: 0000000012671000 CR4: 0000000000352ef0