loop0: detected capacity change from 0 to 32768
 ... Log Wrap ... Log Wrap ... Log Wrap ...
read_mapping_page failed!
ERROR: (device loop0): txCommit: 
read_mapping_page failed!
ERROR: (device loop0): txCommit: 
==================================================================
BUG: KASAN: slab-out-of-bounds in dtInsertEntry+0x10e1/0x1780 fs/jfs/jfs_dtree.c:3753
Read of size 4 at addr ffff88806f70401c by task syz.0.16/6056

CPU: 1 UID: 0 PID: 6056 Comm: syz.0.16 Not tainted 6.15.0-rc2-syzkaller-g834a4a689699 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x23d/0x360 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:408 [inline]
 print_report+0x16a/0x5b0 mm/kasan/report.c:521
 kasan_report+0x13f/0x180 mm/kasan/report.c:634
 dtInsertEntry+0x10e1/0x1780 fs/jfs/jfs_dtree.c:3753
 dtSplitPage+0x2e3d/0x3f80 fs/jfs/jfs_dtree.c:1596
 dtSplitUp fs/jfs/jfs_dtree.c:1092 [inline]
 dtInsert+0x1664/0x6fa0 fs/jfs/jfs_dtree.c:871
 jfs_create+0x7c0/0xbb0 fs/jfs/namei.c:137
 lookup_open fs/namei.c:3666 [inline]
 open_last_lookups fs/namei.c:3765 [inline]
 path_openat+0x1947/0x35c0 fs/namei.c:4001
 do_filp_open+0x280/0x4e0 fs/namei.c:4031
 do_sys_openat2+0x127/0x1d0 fs/open.c:1429
 do_sys_open fs/open.c:1444 [inline]
 __do_sys_openat fs/open.c:1460 [inline]
 __se_sys_openat fs/open.c:1455 [inline]
 __x64_sys_openat+0x245/0x2a0 fs/open.c:1455
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x7e/0x180 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f0833d8d169
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:00007f0834c0c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f0833fa5fa0 RCX: 00007f0833d8d169
RDX: 0000000000105042 RSI: 0000200000000200 RDI: ffffffffffffff9c
RBP: 00007f0833e0e990 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000150 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f0833fa5fa0 R15: 00007fff2b648788
 </TASK>

Allocated by task 6056:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3b/0x70 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:319 [inline]
 __kasan_slab_alloc+0x62/0x70 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_lru_noprof+0x1dd/0x370 mm/slub.c:4219
 jfs_alloc_inode+0x24/0x60 fs/jfs/super.c:105
 alloc_inode+0x65/0x1a0 fs/inode.c:346
 iget_locked+0xed/0x570 fs/inode.c:1439
 jfs_iget+0x1f/0x3d0 fs/jfs/inode.c:29
 jfs_lookup+0x235/0x440 fs/jfs/namei.c:1469
 __lookup_slow+0x2ad/0x400 fs/namei.c:1807
 lookup_slow+0x53/0x70 fs/namei.c:1824
 walk_component+0x2f4/0x420 fs/namei.c:2128
 lookup_last fs/namei.c:2626 [inline]
 path_lookupat+0x169/0x440 fs/namei.c:2650
 filename_lookup+0x28c/0x660 fs/namei.c:2679
 user_path_at+0x36/0x50 fs/namei.c:3085
 __do_sys_chdir fs/open.c:557 [inline]
 __se_sys_chdir+0xb6/0x260 fs/open.c:551
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x7e/0x180 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x76/0x7e

The buggy address belongs to the object at ffff88806f703750
 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 [ffff88806f703750, ffff88806f704008)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6f700
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801bbb1640 dead000000000122 0000000000000000
raw: 0000000000000000 00000000800d000d 00000000f5000000 0000000000000000
head: 00fff00000000040 ffff88801bbb1640 dead000000000122 0000000000000000
head: 0000000000000000 00000000800d000d 00000000f5000000 0000000000000000
head: 00fff00000000003 ffffea0001bdc001 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 6056, tgid 6055 (syz.0.16), ts 145636118481, free_ts 87933490643
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1e0/0x220 mm/page_alloc.c:1717
 prep_new_page mm/page_alloc.c:1725 [inline]
 get_page_from_freelist+0x34b5/0x3640 mm/page_alloc.c:3652
 __alloc_frozen_pages_noprof+0x20d/0x5a0 mm/page_alloc.c:4934
 alloc_pages_mpol+0x335/0x690 mm/mempolicy.c:2301
 alloc_slab_page mm/slub.c:2459 [inline]
 allocate_slab+0x8f/0x390 mm/slub.c:2623
 new_slab mm/slub.c:2676 [inline]
 ___slab_alloc+0xc55/0x14f0 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_lru_noprof+0x268/0x370 mm/slub.c:4219
 jfs_alloc_inode+0x24/0x60 fs/jfs/super.c:105
 alloc_inode+0x65/0x1a0 fs/inode.c:346
 new_inode+0x1e/0x180 fs/inode.c:1145
 jfs_fill_super+0x56c/0xd90 fs/jfs/super.c:511
 get_tree_bdev_flags+0x48c/0x5c0 fs/super.c:1636
 vfs_get_tree+0x8c/0x280 fs/super.c:1759
 do_new_mount+0x2cb/0xb70 fs/namespace.c:3881
 do_mount fs/namespace.c:4221 [inline]
 __do_sys_mount fs/namespace.c:4432 [inline]
 __se_sys_mount+0x388/0x400 fs/namespace.c:4409
page last free pid 5775 tgid 5775 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1262 [inline]
 free_unref_folios+0xdbe/0x17a0 mm/page_alloc.c:2737
 folios_put_refs+0x706/0x800 mm/swap.c:992
 free_pages_and_swap_cache+0x2e6/0x690 mm/swap_state.c:267
 __tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline]
 tlb_batch_pages_flush mm/mmu_gather.c:149 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:397 [inline]
 tlb_flush_mmu+0x3a5/0x680 mm/mmu_gather.c:404
 tlb_finish_mmu+0xd0/0x1f0 mm/mmu_gather.c:496
 vms_clear_ptes+0x42d/0x530 mm/vma.c:1158
 vms_complete_munmap_vmas+0x210/0x8e0 mm/vma.c:1200
 do_vmi_align_munmap+0x4e3/0x5b0 mm/vma.c:1459
 do_vmi_munmap+0x24a/0x2d0 mm/vma.c:1507
 __vm_munmap+0x36f/0x510 mm/vma.c:2970
 __do_sys_munmap mm/mmap.c:1084 [inline]
 __se_sys_munmap mm/mmap.c:1081 [inline]
 __x64_sys_munmap+0x5c/0x70 mm/mmap.c:1081
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x7e/0x180 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x76/0x7e

Memory state around the buggy address:
 ffff88806f703f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88806f703f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88806f704000: 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                            ^
 ffff88806f704080: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88806f704100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================