loop0: detected capacity change from 0 to 32768
JFS: metapage_get_blocks failed
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 ffff888031bd6db8 by task syz.0.0/5313

CPU: 0 UID: 0 PID: 5313 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
 write_metapage fs/jfs/jfs_metapage.h:75 [inline]
 flush_metapage fs/jfs/jfs_metapage.h:81 [inline]
 ea_put fs/jfs/xattr.c:623 [inline]
 __jfs_setxattr+0xe61/0x1190 fs/jfs/xattr.c:792
 __jfs_set_acl fs/jfs/acl.c:83 [inline]
 jfs_set_acl+0x2c3/0x460 fs/jfs/acl.c:110
 set_posix_acl fs/posix_acl.c:960 [inline]
 vfs_set_acl+0x8a0/0xb50 fs/posix_acl.c:1139
 do_set_acl+0xf5/0x190 fs/posix_acl.c:1284
 do_setxattr fs/xattr.c:659 [inline]
 file_setxattr+0x233/0x2b0 fs/xattr.c:672
 path_setxattrat+0x3cc/0x450 fs/xattr.c:732
 __do_sys_fsetxattr fs/xattr.c:782 [inline]
 __se_sys_fsetxattr fs/xattr.c:779 [inline]
 __x64_sys_fsetxattr+0xbc/0xe0 fs/xattr.c:779
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f687a19e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f687afabfe8 EFLAGS: 00000246 ORIG_RAX: 00000000000000be
RAX: ffffffffffffffda RBX: 00007f687a425fa0 RCX: 00007f687a19e159
RDX: 0000200000000240 RSI: 0000200000000000 RDI: 0000000000000005
RBP: 00007f687a23503b R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000024 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f687a426038 R14: 00007f687a425fa0 R15: 00007ffdf92a5238
 </TASK>

Allocated by task 5313:
 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:4683 [inline]
 slab_alloc_node mm/slub.c:4996 [inline]
 kmem_cache_alloc_noprof+0x2b9/0x600 mm/slub.c:5010
 mempool_alloc_noprof+0x1bf/0x300 mm/mempool.c:572
 alloc_metapage fs/jfs/jfs_metapage.c:264 [inline]
 __get_metapage+0x4ed/0xdf0 fs/jfs/jfs_metapage.c:761
 ea_get+0xb9d/0x1300 fs/jfs/xattr.c:528
 __jfs_setxattr+0x5d5/0x1190 fs/jfs/xattr.c:727
 __jfs_set_acl fs/jfs/acl.c:83 [inline]
 jfs_set_acl+0x2c3/0x460 fs/jfs/acl.c:110
 set_posix_acl fs/posix_acl.c:960 [inline]
 vfs_set_acl+0x8a0/0xb50 fs/posix_acl.c:1139
 do_set_acl+0xf5/0x190 fs/posix_acl.c:1284
 do_setxattr fs/xattr.c:659 [inline]
 file_setxattr+0x233/0x2b0 fs/xattr.c:672
 path_setxattrat+0x3cc/0x450 fs/xattr.c:732
 __do_sys_fsetxattr fs/xattr.c:782 [inline]
 __se_sys_fsetxattr fs/xattr.c:779 [inline]
 __x64_sys_fsetxattr+0xbc/0xe0 fs/xattr.c:779
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 77:
 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:2748 [inline]
 slab_free mm/slub.c:6499 [inline]
 kmem_cache_free+0x182/0x650 mm/slub.c:6626
 mempool_free+0xec/0x130 mm/mempool.c:717
 free_metapage fs/jfs/jfs_metapage.c:280 [inline]
 metapage_release_folio+0x462/0x590 fs/jfs/jfs_metapage.c:637
 shrink_folio_list+0x233f/0x5250 mm/vmscan.c:1461
 evict_folios+0x3055/0x3fb0 mm/vmscan.c:4910
 try_to_shrink_lruvec+0xe3b/0x1340 mm/vmscan.c:5076
 shrink_one+0x233/0x730 mm/vmscan.c:5117
 shrink_many mm/vmscan.c:5180 [inline]
 lru_gen_shrink_node mm/vmscan.c:5258 [inline]
 shrink_node+0x35d0/0x3e30 mm/vmscan.c:6247
 kswapd_shrink_node mm/vmscan.c:7101 [inline]
 balance_pgdat mm/vmscan.c:7279 [inline]
 kswapd+0x185e/0x32c0 mm/vmscan.c:7555
 kthread+0x38b/0x480 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 ffff888031bd6d90
 which belongs to the cache jfs_mp of size 184
The buggy address is located 40 bytes inside of
 freed 184-byte region [ffff888031bd6d90, ffff888031bd6e48)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x31bd6
flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 04fff00000000000 ffff888031b93140 dead000000000122 0000000000000000
raw: 0000000000000000 0000000200100010 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 8685012586
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1871
 prep_new_page mm/page_alloc.c:1879 [inline]
 get_page_from_freelist+0x2209/0x2280 mm/page_alloc.c:3943
 __alloc_frozen_pages_noprof+0x217/0x5a0 mm/page_alloc.c:5436
 alloc_slab_page mm/slub.c:3347 [inline]
 allocate_slab+0x7d/0x620 mm/slub.c:3462
 new_slab mm/slub.c:3513 [inline]
 refill_objects+0x2d5/0x350 mm/slub.c:7410
 refill_sheaf mm/slub.c:2885 [inline]
 __pcs_replace_empty_main+0x2c8/0x6c0 mm/slub.c:4774
 alloc_from_pcs mm/slub.c:4850 [inline]
 slab_alloc_node mm/slub.c:4984 [inline]
 kmem_cache_alloc_noprof+0x399/0x600 mm/slub.c:5010
 mempool_init_node+0x1f4/0x510 mm/mempool.c:272
 mempool_create_node_noprof+0xb8/0x150 mm/mempool.c:336
 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:1357
 do_initcall_level+0x10a/0x1a0 init/main.c:1419
 do_initcalls+0x59/0xa0 init/main.c:1435
 kernel_init_freeable+0x29d/0x3e0 init/main.c:1670
 kernel_init+0x22/0x1d0 init/main.c:1560
page_owner free stack trace missing

Memory state around the buggy address:
 ffff888031bd6c80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888031bd6d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888031bd6d80: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb
                                        ^
 ffff888031bd6e00: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc
 ffff888031bd6e80: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================