UDF-fs: error (device loop0): udf_read_tagged: tag version 0x0000 != 0x0002 || 0x0003, block 0
UDF-fs: error (device loop0): udf_read_tagged: read failed, block=512, location=512
UDF-fs: warning (device loop0): udf_fill_super: No partition found (1)
==================================================================
BUG: KASAN: slab-use-after-free in __list_lru_walk_one+0xfb/0x420 mm/list_lru.c:289
Read of size 8 at addr ffff88805506f078 by task syz.0.108/6383
CPU: 1 UID: 0 PID: 6383 Comm: syz.0.108 Not tainted 6.15.0-next-20250527-syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
<TASK>
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xd2/0x2b0 mm/kasan/report.c:521
kasan_report+0x118/0x150 mm/kasan/report.c:634
__list_lru_walk_one+0xfb/0x420 mm/list_lru.c:289
list_lru_walk_one+0x3c/0x50 mm/list_lru.c:337
list_lru_shrink_walk include/linux/list_lru.h:262 [inline]
gfs2_qd_shrink_scan+0x155/0x330 fs/gfs2/quota.c:182
do_shrink_slab+0x6ef/0x1110 mm/shrinker.c:437
shrink_slab+0xd74/0x10d0 mm/shrinker.c:664
drop_slab_node mm/vmscan.c:442 [inline]
drop_slab+0x14e/0x290 mm/vmscan.c:460
drop_caches_sysctl_handler+0xc7/0x170 fs/drop_caches.c:68
proc_sys_call_handler+0x50c/0x7c0 fs/proc/proc_sysctl.c:601
do_iter_readv_writev+0x515/0x6e0 fs/read_write.c:-1
vfs_writev+0x31a/0x960 fs/read_write.c:1057
do_writev+0x14d/0x2d0 fs/read_write.c:1103
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fab5258e969
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fab5343a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007fab527b5fa0 RCX: 00007fab5258e969
RDX: 0000000000000001 RSI: 00002000000000c0 RDI: 000000000000000a
RBP: 00007fab52610ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fab527b5fa0 R15: 00007ffd0f2fc9b8
</TASK>
Allocated by task 6347:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4148 [inline]
slab_alloc_node mm/slub.c:4197 [inline]
kmem_cache_alloc_noprof+0x1c1/0x3c0 mm/slub.c:4204
qd_alloc+0x50/0x250 fs/gfs2/quota.c:234
gfs2_quota_init+0x777/0x1230 fs/gfs2/quota.c:1448
gfs2_make_fs_rw+0x181/0x2b0 fs/gfs2/super.c:149
gfs2_fill_super+0x19e5/0x2010 fs/gfs2/ops_fstype.c:1275
get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1679
gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1333
vfs_get_tree+0x8f/0x2b0 fs/super.c:1802
do_new_mount+0x24a/0xa40 fs/namespace.c:3856
do_mount fs/namespace.c:4193 [inline]
__do_sys_mount fs/namespace.c:4404 [inline]
__se_sys_mount+0x317/0x410 fs/namespace.c:4381
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 23:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x62/0x70 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2381 [inline]
slab_free mm/slub.c:4643 [inline]
kmem_cache_free+0x18f/0x400 mm/slub.c:4745
gfs2_qd_dealloc+0x70/0xe0 fs/gfs2/quota.c:111
rcu_do_batch kernel/rcu/tree.c:2576 [inline]
rcu_core+0xca5/0x1710 kernel/rcu/tree.c:2832
handle_softirqs+0x283/0x870 kernel/softirq.c:579
run_ksoftirqd+0x9b/0x100 kernel/softirq.c:968
smpboot_thread_fn+0x542/0xa60 kernel/smpboot.c:164
kthread+0x711/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Last potentially related work creation:
kasan_save_stack+0x3e/0x60 mm/kasan/common.c:47
kasan_record_aux_stack+0xbd/0xd0 mm/kasan/generic.c:548
__call_rcu_common kernel/rcu/tree.c:3090 [inline]
call_rcu+0x142/0x990 kernel/rcu/tree.c:3210
gfs2_quota_sync+0x3c4/0x460 fs/gfs2/quota.c:1361
gfs2_sync_fs+0x4c/0xb0 fs/gfs2/super.c:660
sync_filesystem+0xeb/0x230 fs/sync.c:56
generic_shutdown_super+0x6f/0x2c0 fs/super.c:622
kill_block_super+0x44/0x90 fs/super.c:1753
deactivate_locked_super+0xbc/0x130 fs/super.c:474
cleanup_mnt+0x425/0x4c0 fs/namespace.c:1417
task_work_run+0x1d4/0x260 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:114
exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff88805506f000
which belongs to the cache gfs2_quotad of size 272
The buggy address is located 120 bytes inside of
freed 272-byte region [ffff88805506f000, ffff88805506f110)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5506f
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff8881405a5000 dead000000000122 0000000000000000
raw: 0000000000000000 00000000800c000c 00000000f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Reclaimable, gfp_mask 0x52c50(GFP_NOFS|__GFP_RECLAIMABLE|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 6144, tgid 6143 (syz.4.51), ts 119363112918, free_ts 99782786731
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1704
prep_new_page mm/page_alloc.c:1712 [inline]
get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3669
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4959
alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2419
alloc_slab_page mm/slub.c:2451 [inline]
allocate_slab+0x8a/0x3b0 mm/slub.c:2619
new_slab mm/slub.c:2673 [inline]
___slab_alloc+0xbfc/0x1480 mm/slub.c:3859
__slab_alloc mm/slub.c:3949 [inline]
__slab_alloc_node mm/slub.c:4024 [inline]
slab_alloc_node mm/slub.c:4185 [inline]
kmem_cache_alloc_noprof+0x283/0x3c0 mm/slub.c:4204
qd_alloc+0x50/0x250 fs/gfs2/quota.c:234
gfs2_quota_init+0x777/0x1230 fs/gfs2/quota.c:1448
gfs2_make_fs_rw+0x181/0x2b0 fs/gfs2/super.c:149
gfs2_fill_super+0x19e5/0x2010 fs/gfs2/ops_fstype.c:1275
get_tree_bdev_flags+0x40e/0x4d0 fs/super.c:1679
gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1333
vfs_get_tree+0x8f/0x2b0 fs/super.c:1802
do_new_mount+0x24a/0xa40 fs/namespace.c:3856
do_mount fs/namespace.c:4193 [inline]
__do_sys_mount fs/namespace.c:4404 [inline]
__se_sys_mount+0x317/0x410 fs/namespace.c:4381
page last free pid 5928 tgid 5927 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1248 [inline]
__free_frozen_pages+0xc71/0xe70 mm/page_alloc.c:2706
__folio_put+0x21b/0x2c0 mm/swap.c:112
update_and_free_hugetlb_folio+0x169/0x280 mm/hugetlb.c:1708
free_huge_folio+0xd72/0x1100 mm/hugetlb.c:-1
folios_put_refs+0x410/0x640 mm/swap.c:973
folio_batch_release include/linux/pagevec.h:101 [inline]
remove_inode_hugepages+0xee3/0x1100 fs/hugetlbfs/inode.c:602
hugetlbfs_evict_inode+0xbf/0x230 fs/hugetlbfs/inode.c:617
evict+0x504/0x9c0 fs/inode.c:810
__dentry_kill+0x209/0x660 fs/dcache.c:669
dput+0x19f/0x2b0 fs/dcache.c:911
__fput+0x68e/0xa70 fs/file_table.c:475
task_work_run+0x1d4/0x260 kernel/task_work.c:227
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0x6ad/0x22e0 kernel/exit.c:955
do_group_exit+0x21c/0x2d0 kernel/exit.c:1104
get_signal+0x1286/0x1340 kernel/signal.c:3034
arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337
Memory state around the buggy address:
ffff88805506ef00: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc
ffff88805506ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88805506f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88805506f080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88805506f100: fb fb fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================