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
loop0: detected capacity change from 32768 to 0
process 'syz.0.0' launched './file2' with NULL argv: empty string added
gfs2: fsid=syz:syz.0: Error -5 writing to journal, jid=0
CPU: 0 UID: 0 PID: 5335 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_end_log_write+0xcd/0x7c0 fs/gfs2/lops.c:212
 gfs2_log_submit_bio+0x99/0xe0 fs/gfs2/lops.c:247
 gfs2_log_flush+0xb0f/0x24c0 fs/gfs2/log.c:1099
 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
 get_signal+0x1285/0x1340 kernel/signal.c:3034
 arch_do_signal_or_restart+0x9a/0x7a0 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop+0x87/0x4f0 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+0x2e3/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5a2198f7c9
Code: Unable to access opcode bytes at 0x7f5a2198f79f.
RSP: 002b:00007f5a2280d0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f5a21be5fa8 RCX: 00007f5a2198f7c9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f5a21be5fa8
RBP: 00007f5a21be5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5a21be6038 R14: 00007fffdd579610 R15: 00007fffdd5796f8
 </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 ffff88800b6302b8 by task syz.0.0/5335

CPU: 0 UID: 0 PID: 5335 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
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xca/0x240 mm/kasan/report.c:482
 kasan_report+0x118/0x150 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+0x2d8/0x430 mm/truncate.c:160
 truncate_inode_pages_range+0x233/0xd90 mm/truncate.c:404
 gfs2_evict_inode+0x87a/0x1000 fs/gfs2/super.c:1426
 evict+0x5f4/0xae0 fs/inode.c:837
 gfs2_evict_inodes fs/gfs2/ops_fstype.c:1760 [inline]
 gfs2_kill_sb+0x2bc/0x430 fs/gfs2/ops_fstype.c:1786
 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
 get_signal+0x1285/0x1340 kernel/signal.c:3034
 arch_do_signal_or_restart+0x9a/0x7a0 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop+0x87/0x4f0 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+0x2e3/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5a2198f7c9
Code: Unable to access opcode bytes at 0x7f5a2198f79f.
RSP: 002b:00007f5a2280d0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f5a21be5fa8 RCX: 00007f5a2198f7c9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f5a21be5fa8
RBP: 00007f5a21be5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5a21be6038 R14: 00007fffdd579610 R15: 00007fffdd5796f8
 </TASK>

Allocated by task 5335:
 kasan_save_stack mm/kasan/common.c:56 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:77
 unpoison_slab_object mm/kasan/common.c:339 [inline]
 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:365
 kasan_slab_alloc include/linux/kasan.h:252 [inline]
 slab_post_alloc_hook mm/slub.c:4948 [inline]
 slab_alloc_node mm/slub.c:5258 [inline]
 kmem_cache_alloc_noprof+0x37d/0x710 mm/slub.c:5265
 gfs2_alloc_bufdata fs/gfs2/trans.c:173 [inline]
 gfs2_trans_add_data+0x200/0x620 fs/gfs2/trans.c:214
 gfs2_trans_add_databufs+0x12f/0x1a0 fs/gfs2/trans.c:251
 gfs2_iomap_put_folio+0x223/0x480 fs/gfs2/bmap.c:995
 iomap_write_iter fs/iomap/buffered-io.c:1137 [inline]
 iomap_file_buffered_write+0x5b2/0x9c0 fs/iomap/buffered-io.c:1188
 gfs2_file_buffered_write+0x4ed/0x880 fs/gfs2/file.c:1061
 gfs2_file_write_iter+0x94e/0x1100 fs/gfs2/file.c:1166
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x5c9/0xb30 fs/read_write.c:686
 ksys_write+0x145/0x250 fs/read_write.c:738
 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

Freed by task 5335:
 kasan_save_stack mm/kasan/common.c:56 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:77
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:252 [inline]
 __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:284
 kasan_slab_free include/linux/kasan.h:234 [inline]
 slab_free_hook mm/slub.c:2540 [inline]
 slab_free mm/slub.c:6663 [inline]
 kmem_cache_free+0x197/0x620 mm/slub.c:6774
 trans_drain fs/gfs2/log.c:1015 [inline]
 gfs2_log_flush+0x17a2/0x24c0 fs/gfs2/log.c:1153
 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
 get_signal+0x1285/0x1340 kernel/signal.c:3034
 arch_do_signal_or_restart+0x9a/0x7a0 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop+0x87/0x4f0 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+0x2e3/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88800b6302a0
 which belongs to the cache gfs2_bufdata of size 80
The buggy address is located 24 bytes inside of
 freed 80-byte region [ffff88800b6302a0, ffff88800b6302f0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb630
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff888000c46a00 dead000000000122 0000000000000000
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 0x52c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5335, tgid 5334 (syz.0.0), ts 87832388117, free_ts 86611450850
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x234/0x290 mm/page_alloc.c:1846
 prep_new_page mm/page_alloc.c:1854 [inline]
 get_page_from_freelist+0x2365/0x2440 mm/page_alloc.c:3915
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5210
 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2486
 alloc_slab_page mm/slub.c:3075 [inline]
 allocate_slab+0x86/0x3b0 mm/slub.c:3248
 new_slab mm/slub.c:3302 [inline]
 ___slab_alloc+0xf2b/0x1960 mm/slub.c:4651
 __slab_alloc+0x65/0x100 mm/slub.c:4774
 __slab_alloc_node mm/slub.c:4850 [inline]
 slab_alloc_node mm/slub.c:5246 [inline]
 kmem_cache_alloc_noprof+0x40f/0x710 mm/slub.c:5265
 gfs2_alloc_bufdata fs/gfs2/trans.c:173 [inline]
 gfs2_trans_add_meta+0x2cf/0x960 fs/gfs2/trans.c:276
 do_gfs2_set_flags fs/gfs2/file.c:265 [inline]
 gfs2_fileattr_set+0x780/0x9b0 fs/gfs2/file.c:311
 vfs_fileattr_set+0x932/0xb90 fs/file_attr.c:298
 ioctl_setflags+0x180/0x1e0 fs/file_attr.c:333
 do_vfs_ioctl+0x8ed/0x1430 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+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 29 tgid 29 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1395 [inline]
 __free_frozen_pages+0xbc8/0xd30 mm/page_alloc.c:2943
 __folio_put+0x21b/0x2c0 mm/swap.c:112
 migrate_folio_move mm/migrate.c:1412 [inline]
 migrate_folios_move mm/migrate.c:1721 [inline]
 migrate_pages_batch+0x22a3/0x35e0 mm/migrate.c:1977
 migrate_pages_sync mm/migrate.c:2007 [inline]
 migrate_pages+0x1b9a/0x28e0 mm/migrate.c:2116
 compact_zone+0x25ba/0x4760 mm/compaction.c:2647
 compact_node+0x1d2/0x280 mm/compaction.c:2916
 kcompactd+0xba8/0x1250 mm/compaction.c:3214
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246

Memory state around the buggy address:
 ffff88800b630180: fb fb fb fb fc fc fc fc fa fb fb fb fb fb fb fb
 ffff88800b630200: fb fb fc fc fc fc fa fb fb fb fb fb fb fb fb fb
>ffff88800b630280: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fc fc
                                        ^
 ffff88800b630300: fc fc fa fb fb fb fb fb fb fb fb fb fc fc fc fc
 ffff88800b630380: fa fb fb fb fb fb fb fb fb fb fc fc fc fc fa fb
==================================================================