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BUG: KASAN: slab-out-of-bounds in memcpy_from_page include/linux/highmem.h:423 [inline]
BUG: KASAN: slab-out-of-bounds in hfs_bnode_read+0x16a/0x200 fs/hfs/bnode.c:35
Write of size 94 at addr ffff88801c752c00 by task syz.7.344/8527
CPU: 0 UID: 0 PID: 8527 Comm: syz.7.344 Not tainted 6.15.0-rc1-syzkaller-00065-g3b07108ada81 #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+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
check_region_inline mm/kasan/generic.c:-1 [inline]
kasan_check_range+0x28f/0x2a0 mm/kasan/generic.c:189
__asan_memcpy+0x40/0x70 mm/kasan/shadow.c:106
memcpy_from_page include/linux/highmem.h:423 [inline]
hfs_bnode_read+0x16a/0x200 fs/hfs/bnode.c:35
hfs_bnode_read_key+0x174/0x240 fs/hfs/bnode.c:70
hfs_brec_insert+0x7f7/0xbe0 fs/hfs/brec.c:159
hfs_cat_create+0x3de/0x760 fs/hfs/catalog.c:118
hfs_create+0x66/0xe0 fs/hfs/dir.c:202
lookup_open fs/namei.c:3666 [inline]
open_last_lookups fs/namei.c:3765 [inline]
path_openat+0x194b/0x35d0 fs/namei.c:4001
do_filp_open+0x284/0x4e0 fs/namei.c:4031
do_sys_openat2+0x12b/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+0x249/0x2a0 fs/open.c:1455
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: 0033:0x7f554df8d169
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:00007f554ed39038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f554e1a6160 RCX: 00007f554df8d169
RDX: 000000000000275a RSI: 00002000000001c0 RDI: ffffffffffffff9c
RBP: 00007f554e00e730 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f554e1a6160 R15: 00007ffc0818c2d8
</TASK>
Allocated by task 8527:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0x9d/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4331 [inline]
__kmalloc_noprof+0x28e/0x4d0 mm/slub.c:4343
kmalloc_noprof include/linux/slab.h:909 [inline]
hfs_find_init+0x92/0x1f0 fs/hfs/bfind.c:21
hfs_cat_create+0x181/0x760 fs/hfs/catalog.c:96
hfs_create+0x66/0xe0 fs/hfs/dir.c:202
lookup_open fs/namei.c:3666 [inline]
open_last_lookups fs/namei.c:3765 [inline]
path_openat+0x194b/0x35d0 fs/namei.c:4001
do_filp_open+0x284/0x4e0 fs/namei.c:4031
do_sys_openat2+0x12b/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+0x249/0x2a0 fs/open.c:1455
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
The buggy address belongs to the object at ffff88801c752c00
which belongs to the cache kmalloc-96 of size 96
The buggy address is located 0 bytes inside of
allocated 78-byte region [ffff88801c752c00, ffff88801c752c4e)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1c752
ksm flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801b041280 ffffea0000cc2180 dead000000000003
raw: 0000000000000000 0000000080200020 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 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 13, tgid 13 (kworker/u8:1), ts 8416754730, free_ts 0
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+0x351d/0x36b0 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]
__kmalloc_cache_noprof+0x26a/0x370 mm/slub.c:4357
kmalloc_noprof include/linux/slab.h:905 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
alloc_ei fs/tracefs/event_inode.c:442 [inline]
eventfs_create_dir+0x71/0x6f0 fs/tracefs/event_inode.c:721
event_create_dir+0x71c/0x9b0 kernel/trace/trace_events.c:3033
__trace_early_add_event_dirs+0x6e/0x1e0 kernel/trace/trace_events.c:4188
early_event_add_tracer+0x52/0x80 kernel/trace/trace_events.c:4375
event_trace_init+0xeb/0x170 kernel/trace/trace_events.c:4529
tracer_init_tracefs_work_func+0x11/0x140 kernel/trace/trace.c:10275
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xac3/0x18e0 kernel/workqueue.c:3319
worker_thread+0x870/0xd50 kernel/workqueue.c:3400
page_owner free stack trace missing
Memory state around the buggy address:
ffff88801c752b00: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
ffff88801c752b80: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc
>ffff88801c752c00: 00 00 00 00 00 00 00 00 00 06 fc fc fc fc fc fc
^
ffff88801c752c80: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc
ffff88801c752d00: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc
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