read_mapping_page failed!
ERROR: (device loop6): txCommit: 
jfs_create: dtSearch returned -17
==================================================================
BUG: KASAN: slab-out-of-bounds in jfs_readdir+0x1a6a/0x3ac0 fs/jfs/jfs_dtree.c:2919
Read of size 4 at addr ffff88805955adac by task syz.6.101/6794

CPU: 0 UID: 0 PID: 6794 Comm: syz.6.101 Not tainted 6.15.0-rc6-syzkaller-00278-g172a9d94339c #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+0xb4/0x290 mm/kasan/report.c:521
 kasan_report+0x118/0x150 mm/kasan/report.c:634
 jfs_readdir+0x1a6a/0x3ac0 fs/jfs/jfs_dtree.c:2919
 wrap_directory_iterator+0x93/0xe0 fs/readdir.c:65
 iterate_dir+0x5ac/0x770 fs/readdir.c:108
 __do_sys_getdents64 fs/readdir.c:403 [inline]
 __se_sys_getdents64+0xe4/0x260 fs/readdir.c:389
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc4f038e969
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:00007fc4f1133038 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007fc4f05b5fa0 RCX: 00007fc4f038e969
RDX: 0000000000001000 RSI: 0000200000000f80 RDI: 0000000000000004
RBP: 00007fc4f0410ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc4f05b5fa0 R15: 00007ffc11837478
 </TASK>

Allocated by task 6794:
 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:4147 [inline]
 slab_alloc_node mm/slub.c:4196 [inline]
 kmem_cache_alloc_lru_noprof+0x1c6/0x3d0 mm/slub.c:4215
 jfs_alloc_inode+0x28/0x70 fs/jfs/super.c:105
 alloc_inode+0x67/0x1b0 fs/inode.c:346
 iget_locked+0xf0/0x570 fs/inode.c:1439
 jfs_iget+0x24/0x3e0 fs/jfs/inode.c:29
 jfs_lookup+0x1c5/0x380 fs/jfs/namei.c:1469
 __lookup_slow+0x297/0x3d0 fs/namei.c:1817
 lookup_slow+0x53/0x70 fs/namei.c:1834
 walk_component+0x2d2/0x400 fs/namei.c:2138
 lookup_last fs/namei.c:2636 [inline]
 path_lookupat+0x163/0x430 fs/namei.c:2660
 filename_lookup+0x212/0x570 fs/namei.c:2689
 user_path_at+0x3a/0x60 fs/namei.c:3120
 __do_sys_chdir fs/open.c:557 [inline]
 __se_sys_chdir+0x91/0x280 fs/open.c:551
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88805955a4e0
 which belongs to the cache jfs_ip of size 2232
The buggy address is located 20 bytes to the right of
 allocated 2232-byte region [ffff88805955a4e0, ffff88805955ad98)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x59558
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff888032f9ca01
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff888143eb9dc0 dead000000000122 0000000000000000
raw: 0000000000000000 00000000800d000d 00000000f5000000 ffff888032f9ca01
head: 00fff00000000040 ffff888143eb9dc0 dead000000000122 0000000000000000
head: 0000000000000000 00000000800d000d 00000000f5000000 ffff888032f9ca01
head: 00fff00000000003 ffffea0001655601 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Reclaimable, gfp_mask 0xd2050(__GFP_RECLAIMABLE|__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 6794, tgid 6792 (syz.6.101), ts 161862200727, free_ts 159363086772
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1d8/0x230 mm/page_alloc.c:1718
 prep_new_page mm/page_alloc.c:1726 [inline]
 get_page_from_freelist+0x21c7/0x22a0 mm/page_alloc.c:3688
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4970
 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2301
 alloc_slab_page mm/slub.c:2450 [inline]
 allocate_slab+0x8a/0x3b0 mm/slub.c:2618
 new_slab mm/slub.c:2672 [inline]
 ___slab_alloc+0xbfc/0x1480 mm/slub.c:3858
 __slab_alloc mm/slub.c:3948 [inline]
 __slab_alloc_node mm/slub.c:4023 [inline]
 slab_alloc_node mm/slub.c:4184 [inline]
 kmem_cache_alloc_lru_noprof+0x288/0x3d0 mm/slub.c:4215
 jfs_alloc_inode+0x28/0x70 fs/jfs/super.c:105
 alloc_inode+0x67/0x1b0 fs/inode.c:346
 new_inode+0x22/0x170 fs/inode.c:1145
 diReadSpecial+0x52/0x710 fs/jfs/jfs_imap.c:426
 jfs_mount+0x174/0x870 fs/jfs/jfs_mount.c:108
 jfs_fill_super+0x6bc/0xd90 fs/jfs/super.c:523
 get_tree_bdev_flags+0x40b/0x4d0 fs/super.c:1636
 vfs_get_tree+0x92/0x2b0 fs/super.c:1759
 do_new_mount+0x24a/0xa40 fs/namespace.c:3881
page last free pid 6742 tgid 6741 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1262 [inline]
 __free_frozen_pages+0xb05/0xcd0 mm/page_alloc.c:2725
 __folio_put+0x21b/0x2c0 mm/swap.c:112
 folio_put include/linux/mm.h:1580 [inline]
 free_large_kmalloc+0x145/0x200 mm/slub.c:4767
 btree_bounce_free fs/bcachefs/btree_io.c:113 [inline]
 btree_node_sort+0x1149/0x1790 fs/bcachefs/btree_io.c:381
 bch2_btree_post_write_cleanup+0x11f/0xab0 fs/bcachefs/btree_io.c:2515
 bch2_btree_node_prep_for_write+0x341/0x660 fs/bcachefs/btree_trans_commit.c:93
 bch2_trans_lock_write+0x669/0xbb0 fs/bcachefs/btree_trans_commit.c:129
 do_bch2_trans_commit fs/bcachefs/btree_trans_commit.c:840 [inline]
 __bch2_trans_commit+0x2cb3/0x8ae0 fs/bcachefs/btree_trans_commit.c:1050
 bch2_trans_commit fs/bcachefs/btree_update.h:195 [inline]
 bch2_trans_mark_metadata_bucket+0x3c4/0x1200 fs/bcachefs/buckets.c:1052
 bch2_trans_mark_metadata_sectors fs/bcachefs/buckets.c:1069 [inline]
 __bch2_trans_mark_dev_sb fs/bcachefs/buckets.c:1109 [inline]
 bch2_trans_mark_dev_sb+0x3ed/0x7c0 fs/bcachefs/buckets.c:1137
 bch2_trans_mark_dev_sbs_flags+0x6a1/0x700 fs/bcachefs/buckets.c:1147
 bch2_fs_initialize+0xab3/0x13c0 fs/bcachefs/recovery.c:1153
 bch2_fs_start+0x6fb/0xae0 fs/bcachefs/super.c:1097
 bch2_fs_get_tree+0xad7/0x13b0 fs/bcachefs/fs.c:2507
 vfs_get_tree+0x92/0x2b0 fs/super.c:1759
 do_new_mount+0x24a/0xa40 fs/namespace.c:3881

Memory state around the buggy address:
 ffff88805955ac80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88805955ad00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88805955ad80: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc
                                  ^
 ffff88805955ae00: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88805955ae80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================