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 3 extents in 0ms
gfs2: fsid=syz:syz.0: first mount done, others may mount
gfs2: fsid=syz:syz.0: found 1 quota changes
comedi comedi3: pcl711: I/O port conflict (0x5,16)
loop0: detected capacity change from 32768 to 64
syz.0.0: attempt to access beyond end of device
loop0: rw=8400896, sector=18192, nr_sectors = 2 limit=64
gfs2: fsid=syz:syz.0: gfs2_evict_inode: -5
syz.0.0: attempt to access beyond end of device
loop0: rw=1, sector=2972, nr_sectors = 150 limit=64
gfs2: fsid=syz:syz.0: Error -5 writing to journal, jid=0
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_end_log_write+0xcd/0x7c0 fs/gfs2/lops.c:212
 gfs2_log_submit_write+0x7e/0xb0 fs/gfs2/lops.c:245
 gfs2_log_flush+0xb30/0x2510 fs/gfs2/log.c:1100
 gfs2_kill_sb+0x5c/0x430 fs/gfs2/ops_fstype.c:1779
 deactivate_locked_super+0xbc/0x130 fs/super.c:476
 cleanup_mnt+0x437/0x4d0 fs/namespace.c:1312
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x69b/0x2320 kernel/exit.c:971
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1112
 get_signal+0x1284/0x1330 kernel/signal.c:3034
 arch_do_signal_or_restart+0xbc/0x830 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
 exit_to_user_mode_loop+0x86/0x480 kernel/entry/common.c:98
 __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 include/linux/entry-common.h:325 [inline]
 do_syscall_64+0x32d/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f59c559c799
Code: Unable to access opcode bytes at 0x7f59c559c76f.
RSP: 002b:00007f59c648a0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f59c5815fa8 RCX: 00007f59c559c799
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f59c5815fac
RBP: 00007f59c5815fa0 R08: 3fffffffffffffff R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f59c5816038 R14: 00007fff79073ba0 R15: 00007fff79073c88
 </TASK>
gfs2: fsid=syz:syz.0: about to withdraw this file system
==================================================================
BUG: KASAN: slab-use-after-free in list_empty include/linux/list.h:381 [inline]
BUG: KASAN: slab-use-after-free in gfs2_discard fs/gfs2/aops.c:589 [inline]
BUG: KASAN: slab-use-after-free in gfs2_invalidate_folio+0x40b/0x750 fs/gfs2/aops.c:627
Read of size 8 at addr ffff88801fd7d868 by task syz.0.0/5321

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
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xba/0x230 mm/kasan/report.c:482
 kasan_report+0x117/0x150 mm/kasan/report.c:595
 list_empty include/linux/list.h:381 [inline]
 gfs2_discard fs/gfs2/aops.c:589 [inline]
 gfs2_invalidate_folio+0x40b/0x750 fs/gfs2/aops.c:627
 folio_invalidate mm/truncate.c:140 [inline]
 truncate_cleanup_folio+0xcb/0x190 mm/truncate.c:160
 truncate_inode_pages_range+0x2ce/0xe30 mm/truncate.c:404
 gfs2_evict_inode+0x324/0x1050 fs/gfs2/super.c:1428
 evict+0x61e/0xb10 fs/inode.c:846
 gfs2_evict_inodes fs/gfs2/ops_fstype.c:1760 [inline]
 gfs2_kill_sb+0x2bb/0x430 fs/gfs2/ops_fstype.c:1786
 deactivate_locked_super+0xbc/0x130 fs/super.c:476
 cleanup_mnt+0x437/0x4d0 fs/namespace.c:1312
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x69b/0x2320 kernel/exit.c:971
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1112
 get_signal+0x1284/0x1330 kernel/signal.c:3034
 arch_do_signal_or_restart+0xbc/0x830 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
 exit_to_user_mode_loop+0x86/0x480 kernel/entry/common.c:98
 __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 include/linux/entry-common.h:325 [inline]
 do_syscall_64+0x32d/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f59c559c799
Code: Unable to access opcode bytes at 0x7f59c559c76f.
RSP: 002b:00007f59c648a0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f59c5815fa8 RCX: 00007f59c559c799
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f59c5815fac
RBP: 00007f59c5815fa0 R08: 3fffffffffffffff R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f59c5816038 R14: 00007fff79073ba0 R15: 00007fff79073c88
 </TASK>

Allocated by task 5321:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 unpoison_slab_object mm/kasan/common.c:340 [inline]
 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:366
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4501 [inline]
 slab_alloc_node mm/slub.c:4830 [inline]
 kmem_cache_alloc_noprof+0x2bc/0x650 mm/slub.c:4837
 gfs2_alloc_bufdata fs/gfs2/trans.c:173 [inline]
 gfs2_trans_add_data+0x1ff/0x620 fs/gfs2/trans.c:214
 gfs2_trans_add_databufs+0x12f/0x1a0 fs/gfs2/trans.c:251
 gfs2_iomap_put_folio+0x222/0x480 fs/gfs2/bmap.c:995
 __iomap_put_folio fs/iomap/buffered-io.c:892 [inline]
 iomap_write_iter fs/iomap/buffered-io.c:1160 [inline]
 iomap_file_buffered_write+0x610/0xb30 fs/iomap/buffered-io.c:1211
 gfs2_file_buffered_write+0x4eb/0x870 fs/gfs2/file.c:1061
 gfs2_file_write_iter+0x976/0x1130 fs/gfs2/file.c:1166
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x61d/0xb90 fs/read_write.c:688
 ksys_write+0x150/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 5321:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:253 [inline]
 __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2687 [inline]
 slab_free mm/slub.c:6124 [inline]
 kmem_cache_free+0x187/0x630 mm/slub.c:6254
 trans_drain fs/gfs2/log.c:1016 [inline]
 gfs2_log_flush+0x17ee/0x2510 fs/gfs2/log.c:1154
 gfs2_kill_sb+0x5c/0x430 fs/gfs2/ops_fstype.c:1779
 deactivate_locked_super+0xbc/0x130 fs/super.c:476
 cleanup_mnt+0x437/0x4d0 fs/namespace.c:1312
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x69b/0x2320 kernel/exit.c:971
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1112
 get_signal+0x1284/0x1330 kernel/signal.c:3034
 arch_do_signal_or_restart+0xbc/0x830 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:64 [inline]
 exit_to_user_mode_loop+0x86/0x480 kernel/entry/common.c:98
 __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 include/linux/entry-common.h:325 [inline]
 do_syscall_64+0x32d/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88801fd7d850
 which belongs to the cache gfs2_bufdata of size 80
The buggy address is located 24 bytes inside of
 freed 80-byte region [ffff88801fd7d850, ffff88801fd7d8a0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1fd7d
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff888031379a00 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000240024 00000000f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0xd2c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5321, tgid 5320 (syz.0.0), ts 87506662205, free_ts 82176189895
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x231/0x280 mm/page_alloc.c:1889
 prep_new_page mm/page_alloc.c:1897 [inline]
 get_page_from_freelist+0x24dc/0x2580 mm/page_alloc.c:3962
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5250
 alloc_slab_page mm/slub.c:3255 [inline]
 allocate_slab+0x77/0x660 mm/slub.c:3444
 new_slab mm/slub.c:3502 [inline]
 refill_objects+0x331/0x3c0 mm/slub.c:7134
 refill_sheaf+0x29/0x50 mm/slub.c:2804
 alloc_full_sheaf mm/slub.c:2825 [inline]
 __pcs_replace_empty_main+0x3ef/0x620 mm/slub.c:4588
 alloc_from_pcs mm/slub.c:4681 [inline]
 slab_alloc_node mm/slub.c:4815 [inline]
 kmem_cache_alloc_noprof+0x37d/0x650 mm/slub.c:4837
 gfs2_alloc_bufdata fs/gfs2/trans.c:173 [inline]
 gfs2_trans_add_meta+0x2ce/0x960 fs/gfs2/trans.c:276
 do_gfs2_set_flags fs/gfs2/file.c:265 [inline]
 gfs2_fileattr_set+0x731/0x9f0 fs/gfs2/file.c:311
 vfs_fileattr_set+0x9f6/0xc90 fs/file_attr.c:301
 ioctl_setflags+0x189/0x1f0 fs/file_attr.c:337
 do_vfs_ioctl+0x9f1/0x1530 fs/ioctl.c:560
 __do_sys_ioctl fs/ioctl.c:595 [inline]
 __se_sys_ioctl+0x82/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 76 tgid 76 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 __free_pages_prepare mm/page_alloc.c:1433 [inline]
 free_unref_folios+0xed5/0x16d0 mm/page_alloc.c:3040
 shrink_folio_list+0x2a0f/0x5290 mm/vmscan.c:1541
 evict_folios+0x4795/0x5880 mm/vmscan.c:4718
 try_to_shrink_lruvec+0xb62/0xfa0 mm/vmscan.c:4881
 shrink_one+0x25c/0x710 mm/vmscan.c:4926
 shrink_many mm/vmscan.c:4989 [inline]
 lru_gen_shrink_node mm/vmscan.c:5067 [inline]
 shrink_node+0x3197/0x3a90 mm/vmscan.c:6047
 kswapd_shrink_node mm/vmscan.c:6894 [inline]
 balance_pgdat mm/vmscan.c:7070 [inline]
 kswapd+0x1742/0x2e10 mm/vmscan.c:7343
 kthread+0x388/0x470 kernel/kthread.c:467
 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Memory state around the buggy address:
 ffff88801fd7d700: fa fb fb fb fb fb fb fb fb fb fc fc fc fc fa fb
 ffff88801fd7d780: fb fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb
>ffff88801fd7d800: fb fb fb fb fb fb fc fc fc fc fa fb fb fb fb fb
                                                          ^
 ffff88801fd7d880: fb fb fb fb fc fc fc fc fa fb fb fb fb fb fb fb
 ffff88801fd7d900: fb fb fc fc fc fc fa fb fb fb fb fb fb fb fb fb
==================================================================