==================================================================
BUG: KASAN: slab-out-of-bounds in hfs_bnode_read+0x1b4/0x2dc fs/hfs/bnode.c:37
Write of size 94 at addr ffff0000e723c300 by task syz.8.127/5268

CPU: 0 PID: 5268 Comm: syz.8.127 Not tainted 5.15.180-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call trace:
 dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 print_address_description+0x7c/0x3f0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0x174/0x1e4 mm/kasan/report.c:451
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x274/0x2b4 mm/kasan/generic.c:189
 memcpy+0xb4/0xe8 mm/kasan/shadow.c:66
 hfs_bnode_read+0x1b4/0x2dc fs/hfs/bnode.c:37
 hfs_bnode_read_key+0x154/0x21c fs/hfs/bnode.c:73
 hfs_brec_insert+0x620/0x97c fs/hfs/brec.c:159
 hfs_cat_create+0x340/0x844 fs/hfs/catalog.c:118
 hfs_create+0x70/0xe4 fs/hfs/dir.c:202
 lookup_open fs/namei.c:3462 [inline]
 open_last_lookups fs/namei.c:3532 [inline]
 path_openat+0xf18/0x26cc fs/namei.c:3739
 do_filp_open+0x1a8/0x3b4 fs/namei.c:3769
 file_open_name fs/open.c:1198 [inline]
 filp_open+0x1f4/0x258 fs/open.c:1218
 do_coredump+0x1d18/0x2890 fs/coredump.c:767
 get_signal+0x3dc/0x1550 kernel/signal.c:2886
 do_signal arch/arm64/kernel/signal.c:890 [inline]
 do_notify_resume+0x320/0x32b8 arch/arm64/kernel/signal.c:943
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
 el0_da+0x118/0x20c arch/arm64/kernel/entry-common.c:495
 el0t_64_sync_handler+0xc0/0xe4 arch/arm64/kernel/entry-common.c:629
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

Allocated by task 5268:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:434 [inline]
 ____kasan_kmalloc+0xbc/0xfc mm/kasan/common.c:513
 __kasan_kmalloc+0x10/0x1c mm/kasan/common.c:522
 kasan_kmalloc include/linux/kasan.h:264 [inline]
 __kmalloc+0x29c/0x4c8 mm/slub.c:4407
 kmalloc include/linux/slab.h:609 [inline]
 hfs_find_init+0x88/0x1c8 fs/hfs/bfind.c:21
 hfs_cat_create+0x168/0x844 fs/hfs/catalog.c:96
 hfs_create+0x70/0xe4 fs/hfs/dir.c:202
 lookup_open fs/namei.c:3462 [inline]
 open_last_lookups fs/namei.c:3532 [inline]
 path_openat+0xf18/0x26cc fs/namei.c:3739
 do_filp_open+0x1a8/0x3b4 fs/namei.c:3769
 file_open_name fs/open.c:1198 [inline]
 filp_open+0x1f4/0x258 fs/open.c:1218
 do_coredump+0x1d18/0x2890 fs/coredump.c:767
 get_signal+0x3dc/0x1550 kernel/signal.c:2886
 do_signal arch/arm64/kernel/signal.c:890 [inline]
 do_notify_resume+0x320/0x32b8 arch/arm64/kernel/signal.c:943
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:133 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:138 [inline]
 el0_da+0x118/0x20c arch/arm64/kernel/entry-common.c:495
 el0t_64_sync_handler+0xc0/0xe4 arch/arm64/kernel/entry-common.c:629
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

The buggy address belongs to the object at ffff0000e723c300
 which belongs to the cache kmalloc-128 of size 128
The buggy address is located 0 bytes inside of
 128-byte region [ffff0000e723c300, ffff0000e723c380)
The buggy address belongs to the page:
page:000000005f163a20 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12723c
flags: 0x5ffc00000000200(slab|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000000200 fffffc000327a340 0000000500000005 ffff0000c0002300
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000e723c200: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff0000e723c280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff0000e723c300: 00 00 00 00 00 00 00 00 00 06 fc fc fc fc fc fc
                                              ^
 ffff0000e723c380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000e723c400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================
Core dump to core aborted: cannot preserve file permissions