loop0: detected capacity change from 0 to 32768
gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz"
gfs2: fsid=syz:syz: Now mounting FS (format 1801)...
gfs2: fsid=syz:syz.0: journal 0 mapped with 9 extents in 0ms
gfs2: fsid=syz:syz.0: first mount done, others may mount
gfs2: fsid=syz:syz.0: found 1 quota changes
syz.0.0: attempt to access beyond end of device
loop0: rw=8402945, sector=68719479080, nr_sectors = 8 limit=32768
Buffer I/O error on dev loop0, logical block 8589934885, lost async page write
syz.0.0: attempt to access beyond end of device
loop0: rw=8400896, sector=68719479080, nr_sectors = 8 limit=32768
gfs2: fsid=syz:syz.0: fatal: I/O error - block = 8589934885, function = gfs2_ail1_empty_one, file = fs/gfs2/log.c, line = 326
CPU: 0 UID: 0 PID: 5321 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 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 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+0xa6e/0x2520 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+0x437/0x4d0 fs/namespace.c:1318
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:44 [inline]
 exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
 do_syscall_64+0x2b7/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1ad719aeb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1ad8104028 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f1ad7415fa0 RCX: 00007f1ad719aeb9
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000000000000000
RBP: 00007f1ad7208c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1ad7416038 R14: 00007f1ad7415fa0 R15: 00007ffc7e4d2768
 </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: 5321 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 04/01/2014
RIP: 0010:gfs2_jindex_free+0x44e/0x450 fs/gfs2/super.c:76
Code: cc cc cc cc cc 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c e2 fd ff ff e8 82 f5 15 fe e9 d8 fd ff ff e8 68 ab 80 07 e8 33 17 ac 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:ffffc90001a0fbc0 EFLAGS: 00010287
RAX: ffffffff8418728d RBX: dead000000000122 RCX: 0000000000100000
RDX: ffffc9000f30a000 RSI: 00000000000306c5 RDI: 00000000000306c6
RBP: ffffc90001a0fc80 R08: ffff888034a90e37 R09: 1ffff110069521c6
R10: dffffc0000000000 R11: ffffed10069521c7 R12: ffff888034a90908
R13: dffffc0000000000 R14: ffff888037be3f00 R15: ffff888037be3f78
FS:  00007f1ad81046c0(0000) GS:ffff88808cce8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561de5863168 CR3: 00000000115a2000 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+0x437/0x4d0 fs/namespace.c:1318
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:44 [inline]
 exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
 do_syscall_64+0x2b7/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1ad719aeb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1ad8104028 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f1ad7415fa0 RCX: 00007f1ad719aeb9
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000000000000000
RBP: 00007f1ad7208c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1ad7416038 R14: 00007f1ad7415fa0 R15: 00007ffc7e4d2768
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:gfs2_jindex_free+0x44e/0x450 fs/gfs2/super.c:76
Code: cc cc cc cc cc 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c e2 fd ff ff e8 82 f5 15 fe e9 d8 fd ff ff e8 68 ab 80 07 e8 33 17 ac 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:ffffc90001a0fbc0 EFLAGS: 00010287
RAX: ffffffff8418728d RBX: dead000000000122 RCX: 0000000000100000
RDX: ffffc9000f30a000 RSI: 00000000000306c5 RDI: 00000000000306c6
RBP: ffffc90001a0fc80 R08: ffff888034a90e37 R09: 1ffff110069521c6
R10: dffffc0000000000 R11: ffffed10069521c7 R12: ffff888034a90908
R13: dffffc0000000000 R14: ffff888037be3f00 R15: ffff888037be3f78
FS:  00007f1ad81046c0(0000) GS:ffff88808cce8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561de5863168 CR3: 00000000115a2000 CR4: 0000000000352ef0