==================================================================
BUG: KASAN: slab-out-of-bounds in mcp2221_raw_event+0xf94/0x1030 drivers/hid/hid-mcp2221.c:854
Read of size 1 at addr ffff888113857fff by task udevd/7531
CPU: 1 UID: 0 PID: 7531 Comm: udevd Not tainted 6.16.0-rc2-syzkaller-00047-geb90d36bfa06 #0 PREEMPT(voluntary)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xcd/0x680 mm/kasan/report.c:521
kasan_report+0xe0/0x110 mm/kasan/report.c:634
mcp2221_raw_event+0xf94/0x1030 drivers/hid/hid-mcp2221.c:854
__hid_input_report.constprop.0+0x311/0x450 drivers/hid/hid-core.c:2117
hid_irq_in+0x35e/0x870 drivers/hid/usbhid/hid-core.c:286
__usb_hcd_giveback_urb+0x38d/0x6e0 drivers/usb/core/hcd.c:1650
usb_hcd_giveback_urb+0x39b/0x450 drivers/usb/core/hcd.c:1734
dummy_timer+0x180e/0x3a20 drivers/usb/gadget/udc/dummy_hcd.c:1995
__run_hrtimer kernel/time/hrtimer.c:1761 [inline]
__hrtimer_run_queues+0x202/0xad0 kernel/time/hrtimer.c:1825
hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1842
handle_softirqs+0x205/0x8d0 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0xfa/0x160 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__sanitizer_cov_trace_pc+0x66/0x70 kernel/kcov.c:235
Code: 82 50 15 00 00 83 f8 02 75 20 48 8b 8a 58 15 00 00 8b 92 54 15 00 00 48 8b 01 48 83 c0 01 48 39 d0 73 07 48 89 01 48 89 34 c1 cc cc cc cc 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90003d6fab8 EFLAGS: 00040293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff82848269
RDX: ffff888112131d00 RSI: ffffffff82848277 RDI: 0000000000000007
RBP: 00007ffc1e227710 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000002000 R11: 0000000000000001 R12: ffffc90003d6fd00
R13: 0000000000000001 R14: 0000000000002000 R15: dffffc0000000000
copy_iovec_from_user+0xd7/0x170 lib/iov_iter.c:1375
__import_iovec_ubuf lib/iov_iter.c:1437 [inline]
__import_iovec+0x44e/0x650 lib/iov_iter.c:1456
import_iovec+0x109/0x140 lib/iov_iter.c:1523
copy_msghdr_from_user+0xf9/0x160 net/socket.c:2503
recvmsg_copy_msghdr net/socket.c:2752 [inline]
___sys_recvmsg+0xdb/0x1a0 net/socket.c:2824
__sys_recvmsg+0x16a/0x220 net/socket.c:2861
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f538a0ab407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffc1e227690 EFLAGS: 00000202 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 00007f5389fbd880 RCX: 00007f538a0ab407
RDX: 0000000000000000 RSI: 00007ffc1e227720 RDI: 000000000000000c
RBP: 00005637215f02c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000563721825bd0
R13: 00007ffc1e2277e0 R14: 00007ffc1e22772c R15: 0000000000000000
Allocated by task 7502:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0x8f/0xa0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4328 [inline]
__kvmalloc_node_noprof+0x273/0x5d0 mm/slub.c:5015
seq_buf_alloc fs/seq_file.c:38 [inline]
seq_read_iter+0x826/0x12c0 fs/seq_file.c:210
kernfs_fop_read_iter+0x40f/0x5a0 fs/kernfs/file.c:279
new_sync_read fs/read_write.c:491 [inline]
vfs_read+0x8bf/0xc60 fs/read_write.c:572
ksys_read+0x12a/0x250 fs/read_write.c:715
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Freed by task 7502:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
poison_slab_object mm/kasan/common.c:247 [inline]
__kasan_slab_free+0x37/0x50 mm/kasan/common.c:264
kasan_slab_free include/linux/kasan.h:233 [inline]
slab_free_hook mm/slub.c:2381 [inline]
slab_free mm/slub.c:4643 [inline]
kfree+0x283/0x470 mm/slub.c:4842
seq_release+0x4b/0x80 fs/seq_file.c:355
kernfs_fop_release+0xf4/0x1e0 fs/kernfs/file.c:766
__fput+0x3ff/0xb70 fs/file_table.c:465
fput_close_sync+0x118/0x260 fs/file_table.c:570
__do_sys_close fs/open.c:1589 [inline]
__se_sys_close fs/open.c:1574 [inline]
__x64_sys_close+0x8b/0x120 fs/open.c:1574
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888113856000
which belongs to the cache kmalloc-cg-4k of size 4096
The buggy address is located 4095 bytes to the right of
allocated 4096-byte region [ffff888113856000, ffff888113857000)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x113850
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88811b03a781
flags: 0x200000000000040(head|node=0|zone=2)
page_type: f5(slab)
raw: 0200000000000040 ffff88810004b500 dead000000000100 dead000000000122
raw: 0000000000000000 0000000000040004 00000000f5000000 ffff88811b03a781
head: 0200000000000040 ffff88810004b500 dead000000000100 dead000000000122
head: 0000000000000000 0000000000040004 00000000f5000000 ffff88811b03a781
head: 0200000000000003 ffffea00044e1401 00000000ffffffff 00000000ffffffff
head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 7636, tgid 7636 (udevd), ts 321061668640, free_ts 320991658528
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1704
prep_new_page mm/page_alloc.c:1712 [inline]
get_page_from_freelist+0xf98/0x2ce0 mm/page_alloc.c:3669
__alloc_frozen_pages_noprof+0x259/0x21e0 mm/page_alloc.c:4959
alloc_pages_mpol+0xe4/0x410 mm/mempolicy.c:2419
alloc_slab_page mm/slub.c:2451 [inline]
allocate_slab mm/slub.c:2619 [inline]
new_slab+0x23b/0x330 mm/slub.c:2673
___slab_alloc+0xda5/0x1940 mm/slub.c:3859
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3949
__slab_alloc_node mm/slub.c:4024 [inline]
slab_alloc_node mm/slub.c:4185 [inline]
__do_kmalloc_node mm/slub.c:4327 [inline]
__kvmalloc_node_noprof+0x1c1/0x5d0 mm/slub.c:5015
seq_buf_alloc fs/seq_file.c:38 [inline]
seq_read_iter+0x826/0x12c0 fs/seq_file.c:210
kernfs_fop_read_iter+0x40f/0x5a0 fs/kernfs/file.c:279
new_sync_read fs/read_write.c:491 [inline]
vfs_read+0x8bf/0xc60 fs/read_write.c:572
ksys_read+0x12a/0x250 fs/read_write.c:715
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 7531 tgid 7531 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1248 [inline]
__free_frozen_pages+0x78a/0x1040 mm/page_alloc.c:2706
discard_slab mm/slub.c:2717 [inline]
__put_partials+0x16d/0x1c0 mm/slub.c:3186
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4d/0x120 mm/kasan/quarantine.c:179
kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286
__kasan_slab_alloc+0x4e/0x70 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4148 [inline]
slab_alloc_node mm/slub.c:4197 [inline]
__do_kmalloc_node mm/slub.c:4327 [inline]
__kvmalloc_node_noprof+0x228/0x5d0 mm/slub.c:5015
seq_buf_alloc fs/seq_file.c:38 [inline]
seq_read_iter+0x826/0x12c0 fs/seq_file.c:210
kernfs_fop_read_iter+0x40f/0x5a0 fs/kernfs/file.c:279
new_sync_read fs/read_write.c:491 [inline]
vfs_read+0x8bf/0xc60 fs/read_write.c:572
ksys_read+0x12a/0x250 fs/read_write.c:715
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff888113857e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff888113857f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888113857f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff888113858000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff888113858080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 50 push %rax
1: 15 00 00 83 f8 adc $0xf8830000,%eax
6: 02 75 20 add 0x20(%rbp),%dh
9: 48 8b 8a 58 15 00 00 mov 0x1558(%rdx),%rcx
10: 8b 92 54 15 00 00 mov 0x1554(%rdx),%edx
16: 48 8b 01 mov (%rcx),%rax
19: 48 83 c0 01 add $0x1,%rax
1d: 48 39 d0 cmp %rdx,%rax
20: 73 07 jae 0x29
22: 48 89 01 mov %rax,(%rcx)
25: 48 89 34 c1 mov %rsi,(%rcx,%rax,8)
* 29: c3 ret <-- trapping instruction
2a: cc int3
2b: cc int3
2c: cc int3
2d: cc int3
2e: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
33: 90 nop
34: 90 nop
35: 90 nop
36: 90 nop
37: 90 nop
38: 90 nop
39: 90 nop
3a: 90 nop
3b: 90 nop
3c: 90 nop
3d: 90 nop
3e: 90 nop