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BUG: KASAN: slab-use-after-free in list_empty include/linux/list.h:373 [inline]
BUG: KASAN: slab-use-after-free in gfs2_discard fs/gfs2/aops.c:587 [inline]
BUG: KASAN: slab-use-after-free in gfs2_invalidate_folio+0x448/0x740 fs/gfs2/aops.c:625
Read of size 8 at addr ffff888032522168 by task syz-executor/5842

CPU: 0 UID: 0 PID: 5842 Comm: syz-executor Not tainted 6.14.0-syzkaller-01103-g2df0c02dab82 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:408 [inline]
 print_report+0x16e/0x5b0 mm/kasan/report.c:521
 kasan_report+0x143/0x180 mm/kasan/report.c:634
 list_empty include/linux/list.h:373 [inline]
 gfs2_discard fs/gfs2/aops.c:587 [inline]
 gfs2_invalidate_folio+0x448/0x740 fs/gfs2/aops.c:625
 folio_invalidate mm/truncate.c:126 [inline]
 truncate_cleanup_folio+0x205/0x300 mm/truncate.c:146
 truncate_inode_pages_range+0x2e7/0x10e0 mm/truncate.c:326
 gfs2_evict_inode+0x444/0x13c0 fs/gfs2/super.c:1527
 evict+0x4fb/0x9b0 fs/inode.c:810
 gfs2_put_super+0x43a/0x940 fs/gfs2/super.c:629
 generic_shutdown_super+0x13b/0x2d0 fs/super.c:642
 kill_block_super+0x44/0x90 fs/super.c:1710
 deactivate_locked_super+0xc6/0x130 fs/super.c:473
 cleanup_mnt+0x422/0x4c0 fs/namespace.c:1435
 task_work_run+0x253/0x310 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3c9b98e497
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007ffde19686d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f3c9ba0e08c RCX: 00007f3c9b98e497
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffde1968790
RBP: 00007ffde1968790 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffde1969820
R13: 00007f3c9ba0e08c R14: 000000000001c1b7 R15: 00007ffde1969860
 </TASK>

Allocated by task 6357:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:319 [inline]
 __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4138 [inline]
 slab_alloc_node mm/slub.c:4187 [inline]
 kmem_cache_alloc_noprof+0x1e1/0x390 mm/slub.c:4194
 gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline]
 gfs2_trans_add_data+0x1f5/0x5f0 fs/gfs2/trans.c:209
 gfs2_unstuffer_folio fs/gfs2/bmap.c:81 [inline]
 __gfs2_unstuff_inode fs/gfs2/bmap.c:119 [inline]
 gfs2_unstuff_dinode+0xc3d/0x14c0 fs/gfs2/bmap.c:166
 gfs2_adjust_quota+0x2e5/0x970 fs/gfs2/quota.c:847
 do_sync+0x83e/0xc60 fs/gfs2/quota.c:961
 gfs2_quota_sync+0x3c2/0x4b0 fs/gfs2/quota.c:1357
 quotad_check_timeo fs/gfs2/quota.c:1567 [inline]
 gfs2_quotad+0x30f/0x910 fs/gfs2/quota.c:1614
 kthread+0x7ab/0x920 kernel/kthread.c:464
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

Freed by task 6357:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:576
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2376 [inline]
 slab_free mm/slub.c:4633 [inline]
 kmem_cache_free+0x197/0x410 mm/slub.c:4735
 trans_drain fs/gfs2/log.c:1020 [inline]
 gfs2_log_flush+0x19ed/0x2620 fs/gfs2/log.c:1160
 do_sync+0xa1c/0xc60 fs/gfs2/quota.c:981
 gfs2_quota_sync+0x3c2/0x4b0 fs/gfs2/quota.c:1357
 quotad_check_timeo fs/gfs2/quota.c:1567 [inline]
 gfs2_quotad+0x30f/0x910 fs/gfs2/quota.c:1614
 kthread+0x7ab/0x920 kernel/kthread.c:464
 ret_from_fork+0x4d/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

The buggy address belongs to the object at ffff888032522150
 which belongs to the cache gfs2_bufdata of size 80
The buggy address is located 24 bytes inside of
 freed 80-byte region [ffff888032522150, ffff8880325221a0)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x32522
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff888141742280 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080240024 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 6357, tgid 6357 (gfs2_quotad/syz), ts 114977608612, free_ts 114966181688
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1551
 prep_new_page mm/page_alloc.c:1559 [inline]
 get_page_from_freelist+0x3695/0x37e0 mm/page_alloc.c:3477
 __alloc_frozen_pages_noprof+0x2c5/0x7b0 mm/page_alloc.c:4740
 alloc_pages_mpol+0x339/0x690 mm/mempolicy.c:2301
 alloc_slab_page mm/slub.c:2446 [inline]
 allocate_slab+0x8f/0x3a0 mm/slub.c:2610
 new_slab mm/slub.c:2663 [inline]
 ___slab_alloc+0xc3b/0x1500 mm/slub.c:3849
 __slab_alloc+0x58/0xa0 mm/slub.c:3939
 __slab_alloc_node mm/slub.c:4014 [inline]
 slab_alloc_node mm/slub.c:4175 [inline]
 kmem_cache_alloc_noprof+0x270/0x390 mm/slub.c:4194
 gfs2_alloc_bufdata fs/gfs2/trans.c:168 [inline]
 gfs2_trans_add_meta+0x323/0xb40 fs/gfs2/trans.c:251
 gfs2_alloc_extent fs/gfs2/rgrp.c:2237 [inline]
 gfs2_alloc_blocks+0xb2f/0x2920 fs/gfs2/rgrp.c:2447
 __gfs2_unstuff_inode fs/gfs2/bmap.c:107 [inline]
 gfs2_unstuff_dinode+0x2b6/0x14c0 fs/gfs2/bmap.c:166
 gfs2_adjust_quota+0x2e5/0x970 fs/gfs2/quota.c:847
 do_sync+0x83e/0xc60 fs/gfs2/quota.c:961
 gfs2_quota_sync+0x3c2/0x4b0 fs/gfs2/quota.c:1357
 quotad_check_timeo fs/gfs2/quota.c:1567 [inline]
 gfs2_quotad+0x30f/0x910 fs/gfs2/quota.c:1614
 kthread+0x7ab/0x920 kernel/kthread.c:464
page last free pid 6341 tgid 6339 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1127 [inline]
 free_frozen_pages+0xe16/0x10f0 mm/page_alloc.c:2660
 discard_slab mm/slub.c:2707 [inline]
 __put_partials+0x160/0x1c0 mm/slub.c:3176
 put_cpu_partial+0x17e/0x250 mm/slub.c:3251
 __slab_free+0x294/0x390 mm/slub.c:4503
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4138 [inline]
 slab_alloc_node mm/slub.c:4187 [inline]
 kmem_cache_alloc_noprof+0x1e1/0x390 mm/slub.c:4194
 lsm_file_alloc security/security.c:733 [inline]
 security_file_alloc+0x32/0x310 security/security.c:2858
 init_file+0x90/0x300 fs/file_table.c:156
 alloc_empty_file+0x70/0x1d0 fs/file_table.c:238
 path_openat+0x10d/0x35d0 fs/namei.c:3990
 do_filp_open+0x284/0x4e0 fs/namei.c:4031
 do_sys_openat2+0x12b/0x1d0 fs/open.c:1429
 do_sys_open fs/open.c:1444 [inline]
 __do_sys_openat fs/open.c:1460 [inline]
 __se_sys_openat fs/open.c:1455 [inline]
 __x64_sys_openat+0x249/0x2a0 fs/open.c:1455
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94

Memory state around the buggy address:
 ffff888032522000: fa fb fb fb fb fb fb fb fb fb fc fc fc fc fa fb
 ffff888032522080: fb fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb
>ffff888032522100: fb fb fb fb fb fb fc fc fc fc fa fb fb fb fb fb
                                                          ^
 ffff888032522180: fb fb fb fb fc fc fc fc fa fb fb fb fb fb fb fb
 ffff888032522200: fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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