loop0: detected capacity change from 0 to 32768
syz.0.0: attempt to access beyond end of device
loop0: rw=1, sector=4680032, nr_sectors = 8 limit=32768
metapage_write_end_io: I/O error
ERROR: (device loop0): release_metapage: metapage_write_one() failed

ERROR: (device loop0): remounting filesystem as read-only
==================================================================
BUG: KASAN: slab-use-after-free in drop_metapage fs/jfs/jfs_metapage.c:312 [inline]
BUG: KASAN: slab-use-after-free in release_metapage+0x717/0xa60 fs/jfs/jfs_metapage.c:893
Read of size 8 at addr ffff888000286218 by task syz.0.0/5330

CPU: 0 UID: 0 PID: 5330 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+0x55/0x1e0 mm/kasan/report.c:378
 print_report+0x58/0x70 mm/kasan/report.c:482
 kasan_report+0x117/0x150 mm/kasan/report.c:595
 drop_metapage fs/jfs/jfs_metapage.c:312 [inline]
 release_metapage+0x717/0xa60 fs/jfs/jfs_metapage.c:893
 diNewIAG fs/jfs/jfs_imap.c:2584 [inline]
 diAllocExt fs/jfs/jfs_imap.c:1905 [inline]
 diAllocAG+0x1757/0x1de0 fs/jfs/jfs_imap.c:1669
 diAlloc+0x1e2/0x16b0 fs/jfs/jfs_imap.c:1590
 ialloc+0x8c/0x8e0 fs/jfs/jfs_inode.c:56
 jfs_mkdir+0x1e4/0xb00 fs/jfs/namei.c:226
 vfs_mkdir+0x406/0x620 fs/namei.c:5272
 filename_mkdirat+0x285/0x510 fs/namei.c:5305
 __do_sys_mkdirat fs/namei.c:5326 [inline]
 __se_sys_mkdirat+0x35/0x150 fs/namei.c:5323
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4bd379bcc7
Code: 00 66 90 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 db f7 ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 b8 02 01 00 00 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:00007f4bd4684e18 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f4bd4684ea0 RCX: 00007f4bd379bcc7
RDX: 00000000000001ff RSI: 0000200000000040 RDI: 00000000ffffff9c
RBP: 0000000000000000 R08: 0000200000000100 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000000040
R13: 00007f4bd4684e60 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

Allocated by task 5330:
 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:4570 [inline]
 slab_alloc_node mm/slub.c:4899 [inline]
 kmem_cache_alloc_noprof+0x2b8/0x650 mm/slub.c:4906
 mempool_alloc_noprof+0x1bf/0x300 mm/mempool.c:566
 alloc_metapage fs/jfs/jfs_metapage.c:264 [inline]
 __get_metapage+0x4ed/0xdf0 fs/jfs/jfs_metapage.c:761
 diNewIAG fs/jfs/jfs_imap.c:2545 [inline]
 diAllocExt fs/jfs/jfs_imap.c:1905 [inline]
 diAllocAG+0x168f/0x1de0 fs/jfs/jfs_imap.c:1669
 diAlloc+0x1e2/0x16b0 fs/jfs/jfs_imap.c:1590
 ialloc+0x8c/0x8e0 fs/jfs/jfs_inode.c:56
 jfs_mkdir+0x1e4/0xb00 fs/jfs/namei.c:226
 vfs_mkdir+0x406/0x620 fs/namei.c:5272
 filename_mkdirat+0x285/0x510 fs/namei.c:5305
 __do_sys_mkdirat fs/namei.c:5326 [inline]
 __se_sys_mkdirat+0x35/0x150 fs/namei.c:5323
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 75:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 kasan_save_free_info+0x40/0x50 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:2689 [inline]
 slab_free mm/slub.c:6251 [inline]
 kmem_cache_free+0x182/0x650 mm/slub.c:6378
 mempool_free+0xec/0x130 mm/mempool.c:711
 free_metapage fs/jfs/jfs_metapage.c:280 [inline]
 metapage_release_folio+0x462/0x590 fs/jfs/jfs_metapage.c:637
 shrink_folio_list+0x2364/0x5320 mm/vmscan.c:1466
 evict_folios+0x4827/0x5970 mm/vmscan.c:4854
 try_to_shrink_lruvec+0xac5/0xf40 mm/vmscan.c:5009
 shrink_one+0x233/0x700 mm/vmscan.c:5069
 shrink_many mm/vmscan.c:5132 [inline]
 lru_gen_shrink_node mm/vmscan.c:5210 [inline]
 shrink_node+0x31d6/0x3a40 mm/vmscan.c:6198
 kswapd_shrink_node mm/vmscan.c:7052 [inline]
 balance_pgdat mm/vmscan.c:7228 [inline]
 kswapd+0x170d/0x2d60 mm/vmscan.c:7501
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245

The buggy address belongs to the object at ffff8880002861f0
 which belongs to the cache jfs_mp of size 184
The buggy address is located 40 bytes inside of
 freed 184-byte region [ffff8880002861f0, ffff8880002862a8)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x286
flags: 0x7ff00000000000(node=0|zone=0|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 007ff00000000000 ffff888031680c80 dead000000000122 0000000000000000
raw: 0000000000000000 0000000800100010 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 0xd2cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, tgid 1 (swapper/0), ts 7664486114, free_ts 0
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x22d/0x280 mm/page_alloc.c:1853
 prep_new_page mm/page_alloc.c:1861 [inline]
 get_page_from_freelist+0x24ae/0x2530 mm/page_alloc.c:3941
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5221
 alloc_slab_page mm/slub.c:3278 [inline]
 allocate_slab+0x77/0x660 mm/slub.c:3467
 new_slab mm/slub.c:3525 [inline]
 refill_objects+0x336/0x3d0 mm/slub.c:7272
 refill_sheaf mm/slub.c:2816 [inline]
 __pcs_replace_empty_main+0x320/0x720 mm/slub.c:4652
 alloc_from_pcs mm/slub.c:4750 [inline]
 slab_alloc_node mm/slub.c:4884 [inline]
 kmem_cache_alloc_noprof+0x373/0x650 mm/slub.c:4906
 mempool_init_node+0x1f4/0x4f0 mm/mempool.c:259
 mempool_create_node_noprof+0xb8/0x150 mm/mempool.c:323
 metapage_init+0xed/0x150 fs/jfs/jfs_metapage.c:293
 init_jfs_fs+0xfd/0x4e0 fs/jfs/super.c:969
 do_one_initcall+0x250/0x870 init/main.c:1392
 do_initcall_level+0x10a/0x1a0 init/main.c:1454
 do_initcalls+0x59/0xa0 init/main.c:1470
 kernel_init_freeable+0x29d/0x3e0 init/main.c:1703
 kernel_init+0x1d/0x1d0 init/main.c:1593
page_owner free stack trace missing

Memory state around the buggy address:
 ffff888000286100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888000286180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fa fb
>ffff888000286200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                            ^
 ffff888000286280: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00
 ffff888000286300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================