diAlloc+0x1db/0x1680 fs/jfs/jfs_imap.c:1590
 ialloc+0x8f/0x8c0 fs/jfs/jfs_inode.c:56
 jfs_mkdir+0x1c7/0xbb0 fs/jfs/namei.c:225
 vfs_mkdir+0x2f9/0x500 fs/namei.c:4324
 do_mkdirat+0x273/0x3f0 fs/namei.c:4357
 __do_sys_mkdirat fs/namei.c:4374 [inline]
 __se_sys_mkdirat fs/namei.c:4372 [inline]
 __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4372
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7b55d8e169
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:00007f7b56cb0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f7b55fb6080 RCX: 00007f7b55d8e169
RDX: 0000000000000000 RSI: 00002000000001c0 RDI: ffffffffffffff9c
RBP: 00007f7b55e10a68 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7b55fb6080 R15: 00007fffc1793498
 </TASK>
getblk(): invalid block size 4096 requested
logical block size: 32768
CPU: 0 UID: 0 PID: 5327 Comm: syz.0.0 Not tainted 6.15.0-rc2-syzkaller-00048-gc62f4b82d571 #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 lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 __getblk_slow fs/buffer.c:1120 [inline]
 bdev_getblk+0x59c/0x670 fs/buffer.c:1431
 __bread_gfp+0x86/0x400 fs/buffer.c:1485
 sb_bread include/linux/buffer_head.h:345 [inline]
 readSuper+0x1a7/0x260 fs/jfs/jfs_mount.c:466
 updateSuper+0x288/0x780 fs/jfs/jfs_mount.c:423
 jfs_handle_error fs/jfs/super.c:69 [inline]
 jfs_error+0x1c2/0x300 fs/jfs/super.c:98
 release_metapage+0x5e7/0xa90 fs/jfs/jfs_metapage.c:777
 diNewIAG fs/jfs/jfs_imap.c:2584 [inline]
 diAllocExt fs/jfs/jfs_imap.c:1905 [inline]
 diAllocAG+0x19fc/0x2100 fs/jfs/jfs_imap.c:1669
 diAlloc+0x1db/0x1680 fs/jfs/jfs_imap.c:1590
 ialloc+0x8f/0x8c0 fs/jfs/jfs_inode.c:56
 jfs_mkdir+0x1c7/0xbb0 fs/jfs/namei.c:225
 vfs_mkdir+0x2f9/0x500 fs/namei.c:4324
 do_mkdirat+0x273/0x3f0 fs/namei.c:4357
 __do_sys_mkdirat fs/namei.c:4374 [inline]
 __se_sys_mkdirat fs/namei.c:4372 [inline]
 __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4372
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7b55d8e169
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:00007f7b56cb0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f7b55fb6080 RCX: 00007f7b55d8e169
RDX: 0000000000000000 RSI: 00002000000001c0 RDI: ffffffffffffff9c
RBP: 00007f7b55e10a68 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7b55fb6080 R15: 00007fffc1793498
 </TASK>
ERROR: (device loop0): remounting filesystem as read-only
==================================================================
BUG: KASAN: slab-use-after-free in drop_metapage fs/jfs/jfs_metapage.c:229 [inline]
BUG: KASAN: slab-use-after-free in release_metapage+0x746/0xa90 fs/jfs/jfs_metapage.c:784
Read of size 8 at addr ffff8880524ffcc0 by task syz.0.0/5327

CPU: 0 UID: 0 PID: 5327 Comm: syz.0.0 Not tainted 6.15.0-rc2-syzkaller-00048-gc62f4b82d571 #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 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
 drop_metapage fs/jfs/jfs_metapage.c:229 [inline]
 release_metapage+0x746/0xa90 fs/jfs/jfs_metapage.c:784
 diNewIAG fs/jfs/jfs_imap.c:2584 [inline]
 diAllocExt fs/jfs/jfs_imap.c:1905 [inline]
 diAllocAG+0x19fc/0x2100 fs/jfs/jfs_imap.c:1669
 diAlloc+0x1db/0x1680 fs/jfs/jfs_imap.c:1590
 ialloc+0x8f/0x8c0 fs/jfs/jfs_inode.c:56
 jfs_mkdir+0x1c7/0xbb0 fs/jfs/namei.c:225
 vfs_mkdir+0x2f9/0x500 fs/namei.c:4324
 do_mkdirat+0x273/0x3f0 fs/namei.c:4357
 __do_sys_mkdirat fs/namei.c:4374 [inline]
 __se_sys_mkdirat fs/namei.c:4372 [inline]
 __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4372
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7b55d8e169
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:00007f7b56cb0038 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f7b55fb6080 RCX: 00007f7b55d8e169
RDX: 0000000000000000 RSI: 00002000000001c0 RDI: ffffffffffffff9c
RBP: 00007f7b55e10a68 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7b55fb6080 R15: 00007fffc1793498
 </TASK>

Allocated by task 5327:
 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:4151 [inline]
 slab_alloc_node mm/slub.c:4200 [inline]
 kmem_cache_alloc_noprof+0x1e1/0x390 mm/slub.c:4207
 mempool_alloc_noprof+0x199/0x5a0 mm/mempool.c:402
 alloc_metapage fs/jfs/jfs_metapage.c:182 [inline]
 __get_metapage+0x5f4/0xdc0 fs/jfs/jfs_metapage.c:652
 diNewIAG fs/jfs/jfs_imap.c:2545 [inline]
 diAllocExt fs/jfs/jfs_imap.c:1905 [inline]
 diAllocAG+0x1922/0x2100 fs/jfs/jfs_imap.c:1669
 diAlloc+0x1db/0x1680 fs/jfs/jfs_imap.c:1590
 ialloc+0x8f/0x8c0 fs/jfs/jfs_inode.c:56
 jfs_mkdir+0x1c7/0xbb0 fs/jfs/namei.c:225
 vfs_mkdir+0x2f9/0x500 fs/namei.c:4324
 do_mkdirat+0x273/0x3f0 fs/namei.c:4357
 __do_sys_mkdirat fs/namei.c:4374 [inline]
 __se_sys_mkdirat fs/namei.c:4372 [inline]
 __x64_sys_mkdirat+0x87/0xa0 fs/namei.c:4372
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 82:
 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:2389 [inline]
 slab_free mm/slub.c:4646 [inline]
 kmem_cache_free+0x197/0x410 mm/slub.c:4748
 free_metapage fs/jfs/jfs_metapage.c:197 [inline]
 metapage_release_folio+0x412/0x540 fs/jfs/jfs_metapage.c:552
 shrink_folio_list+0x2260/0x5e80 mm/vmscan.c:1502
 evict_folios+0x4712/0x58f0 mm/vmscan.c:4698
 try_to_shrink_lruvec+0x72e/0x9d0 mm/vmscan.c:4859
 shrink_one+0x3b9/0x850 mm/vmscan.c:4904
 shrink_many mm/vmscan.c:4967 [inline]
 lru_gen_shrink_node mm/vmscan.c:5045 [inline]
 shrink_node+0x37a1/0x3e10 mm/vmscan.c:6016
 kswapd_shrink_node mm/vmscan.c:6844 [inline]
 balance_pgdat mm/vmscan.c:7027 [inline]
 kswapd+0x210d/0x3b10 mm/vmscan.c:7292
 kthread+0x7b7/0x940 kernel/kthread.c:464
 ret_from_fork+0x4b/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 ffff8880524ffc98
 which belongs to the cache jfs_mp of size 184
The buggy address is located 40 bytes inside of
 freed 184-byte region [ffff8880524ffc98, ffff8880524ffd50)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x524ff
flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 04fff00000000000 ffff8880335b3b40 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080100010 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 0xd2800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5326, tgid 5325 (syz.0.0), ts 76677479139, free_ts 76675075311
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1717
 prep_new_page mm/page_alloc.c:1725 [inline]
 get_page_from_freelist+0x352b/0x36c0 mm/page_alloc.c:3652
 __alloc_frozen_pages_noprof+0x211/0x5b0 mm/page_alloc.c:4934
 alloc_pages_mpol+0x339/0x690 mm/mempolicy.c:2301
 alloc_slab_page mm/slub.c:2459 [inline]
 allocate_slab+0x8f/0x3a0 mm/slub.c:2623
 new_slab mm/slub.c:2676 [inline]
 ___slab_alloc+0xc3b/0x1500 mm/slub.c:3862
 __slab_alloc+0x58/0xa0 mm/slub.c:3952
 __slab_alloc_node mm/slub.c:4027 [inline]
 slab_alloc_node mm/slub.c:4188 [inline]
 kmem_cache_alloc_noprof+0x270/0x390 mm/slub.c:4207
 mempool_alloc_noprof+0x199/0x5a0 mm/mempool.c:402
 alloc_metapage fs/jfs/jfs_metapage.c:182 [inline]
 __get_metapage+0x5f4/0xdc0 fs/jfs/jfs_metapage.c:652
 diReadSpecial+0x25d/0x720 fs/jfs/jfs_imap.c:447
 jfs_mount+0x75/0x830 fs/jfs/jfs_mount.c:87
 jfs_fill_super+0x6b9/0xd90 fs/jfs/super.c:523
 get_tree_bdev_flags+0x490/0x5c0 fs/super.c:1636
 vfs_get_tree+0x90/0x2b0 fs/super.c:1759
 do_new_mount+0x2cf/0xb70 fs/namespace.c:3881
page last free pid 4732 tgid 4732 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1262 [inline]
 __free_frozen_pages+0xde8/0x10a0 mm/page_alloc.c:2680
 discard_slab mm/slub.c:2720 [inline]
 __put_partials+0x160/0x1c0 mm/slub.c:3189
 put_cpu_partial+0x17e/0x250 mm/slub.c:3264
 __slab_free+0x294/0x390 mm/slub.c:4516
 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:4151 [inline]
 slab_alloc_node mm/slub.c:4200 [inline]
 kmem_cache_alloc_noprof+0x1e1/0x390 mm/slub.c:4207
 getname_flags+0xb7/0x530 fs/namei.c:146
 getname include/linux/fs.h:2852 [inline]
 getname_maybe_null include/linux/fs.h:2859 [inline]
 vfs_fstatat+0x43/0x150 fs/stat.c:363
 __do_sys_newfstatat fs/stat.c:532 [inline]
 __se_sys_newfstatat fs/stat.c:526 [inline]
 __x64_sys_newfstatat+0x11f/0x1a0 fs/stat.c:526
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff8880524ffb80: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8880524ffc00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc
>ffff8880524ffc80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb
                                           ^
 ffff8880524ffd00: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc
 ffff8880524ffd80: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================