loop0: detected capacity change from 0 to 32768
UFO tlock:0x00000000e535e179
==================================================================
BUG: KASAN: use-after-free in dtInsertEntry+0x788/0x1000 fs/jfs/jfs_dtree.c:3689
Read of size 1 at addr ffff0000d8d69e00 by task syz.0.17/4509

CPU: 1 PID: 4509 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026
Call trace:
 dump_backtrace+0x1c4/0x1f0 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf4/0x15c lib/dump_stack.c:106
 print_address_description+0x88/0x218 mm/kasan/report.c:316
 print_report+0x50/0x68 mm/kasan/report.c:420
 kasan_report+0xa8/0xfc mm/kasan/report.c:524
 __asan_report_load1_noabort+0x2c/0x38 mm/kasan/report_generic.c:348
 dtInsertEntry+0x788/0x1000 fs/jfs/jfs_dtree.c:3689
 dtInsert+0x744/0x5710 fs/jfs/jfs_dtree.c:894
 jfs_mkdir+0x5ec/0x8fc fs/jfs/namei.c:270
 vfs_mkdir+0x314/0x4d8 fs/namei.c:4114
 do_mkdirat+0x1b8/0x3ec fs/namei.c:4139
 __do_sys_mkdirat fs/namei.c:4154 [inline]
 __se_sys_mkdirat fs/namei.c:4152 [inline]
 __arm64_sys_mkdirat+0x90/0xa8 fs/namei.c:4152
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

Allocated by task 4316:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4c/0x80 mm/kasan/common.c:53
 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:505
 __kasan_slab_alloc+0x70/0x88 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook+0x74/0x430 mm/slab.h:737
 slab_alloc_node mm/slub.c:3359 [inline]
 slab_alloc mm/slub.c:3367 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3374 [inline]
 kmem_cache_alloc+0x234/0x310 mm/slub.c:3383
 mt_alloc_one lib/maple_tree.c:154 [inline]
 mas_alloc_nodes+0x284/0x758 lib/maple_tree.c:1279
 mas_node_count_gfp lib/maple_tree.c:1361 [inline]
 mas_preallocate+0x13c/0x310 lib/maple_tree.c:5809
 __mmap_region mm/mmap.c:2765 [inline]
 mmap_region+0xbf0/0x1860 mm/mmap.c:2916
 do_mmap+0xa64/0x1210 mm/mmap.c:1436
 vm_mmap_pgoff+0x194/0x298 mm/util.c:520
 vm_mmap+0x8c/0xb4 mm/util.c:539
 elf_map+0xf4/0x230 fs/binfmt_elf.c:371
 load_elf_interp+0x3d4/0x94c fs/binfmt_elf.c:664
 load_elf_binary+0x1274/0x1ba4 fs/binfmt_elf.c:1272
 search_binary_handler fs/exec.c:1764 [inline]
 exec_binprm fs/exec.c:1805 [inline]
 bprm_execve+0x944/0x1588 fs/exec.c:1874
 do_execveat_common+0x668/0x7fc fs/exec.c:1979
 do_execve fs/exec.c:2053 [inline]
 __do_sys_execve fs/exec.c:2129 [inline]
 __se_sys_execve fs/exec.c:2124 [inline]
 __arm64_sys_execve+0x98/0xb0 fs/exec.c:2124
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x13c/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x5c/0x134 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

The buggy address belongs to the object at ffff0000d8d69e00
 which belongs to the cache maple_node of size 256
The buggy address is located 0 bytes inside of
 256-byte region [ffff0000d8d69e00, ffff0000d8d69f00)

The buggy address belongs to the physical page:
page:00000000fc1f272a refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff0000d8d68e00 pfn:0x118d68
head:00000000fc1f272a order:1 compound_mapcount:0 compound_pincount:0
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 fffffc0003381d88 fffffc00032d5d08 ffff0000c000d680
raw: ffff0000d8d68e00 000000000010000c 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000d8d69d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000d8d69d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff0000d8d69e00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff0000d8d69e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff0000d8d69f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================