==================================================================
BUG: KASAN: slab-out-of-bounds in mcp2221_raw_event+0xf98/0x1030 drivers/hid/hid-mcp2221.c:852
Read of size 1 at addr ffff88812ce57fff by task kworker/1:2/22632
CPU: 1 UID: 0 PID: 22632 Comm: kworker/1:2 Not tainted 6.13.0-rc1-syzkaller-gd8d936c51388 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events dvb_usb_read_remote_control
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:378 [inline]
print_report+0xc3/0x620 mm/kasan/report.c:489
kasan_report+0xd9/0x110 mm/kasan/report.c:602
mcp2221_raw_event+0xf98/0x1030 drivers/hid/hid-mcp2221.c:852
__hid_input_report.constprop.0+0x312/0x440 drivers/hid/hid-core.c:2111
hid_irq_in+0x35e/0x870 drivers/hid/usbhid/hid-core.c:285
__usb_hcd_giveback_urb+0x389/0x6e0 drivers/usb/core/hcd.c:1650
usb_hcd_giveback_urb+0x396/0x450 drivers/usb/core/hcd.c:1734
dummy_timer+0x17f0/0x3930 drivers/usb/gadget/udc/dummy_hcd.c:1993
__run_hrtimer kernel/time/hrtimer.c:1739 [inline]
__hrtimer_run_queues+0x20a/0xae0 kernel/time/hrtimer.c:1803
hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1820
handle_softirqs+0x206/0x8d0 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu+0xfa/0x160 kernel/softirq.c:655
irq_exit_rcu+0x9/0x30 kernel/softirq.c:671
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1049
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:console_flush_all+0x9a4/0xc60 kernel/printk/printk.c:3211
Code: 00 e8 90 de 27 00 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 1e 39 20 00 48 85 db 0f 85 55 01 00 00 e8 a0 36 20 00 fb 4c 89 e0 <48> c1 e8 03 42 80 3c 38 00 0f 84 11 ff ff ff 4c 89 e7 e8 25 41 7a
RSP: 0018:ffffc9000a7b7908 EFLAGS: 00000293
RAX: ffffffff893a7798 RBX: 0000000000000000 RCX: ffffffff813b1bb2
RDX: ffff88810ab6d7c0 RSI: ffffffff813b1bc0 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000005 R12: ffffffff893a7798
R13: ffffffff893a7740 R14: ffffc9000a7b7998 R15: dffffc0000000000
__console_flush_and_unlock kernel/printk/printk.c:3269 [inline]
console_unlock+0xd9/0x210 kernel/printk/printk.c:3309
vprintk_emit+0x424/0x6f0 kernel/printk/printk.c:2432
vprintk+0x7f/0xa0 kernel/printk/printk_safe.c:86
_printk+0xc8/0x100 kernel/printk/printk.c:2457
m920x_read drivers/media/usb/dvb-usb/m920x.c:40 [inline]
m920x_rc_core_query+0x2d7/0x500 drivers/media/usb/dvb-usb/m920x.c:229
dvb_usb_read_remote_control+0xda/0x1c0 drivers/media/usb/dvb-usb/dvb-usb-remote.c:261
process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
process_scheduled_works kernel/workqueue.c:3310 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Allocated by task 26:
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x6e/0x70 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4104 [inline]
slab_alloc_node mm/slub.c:4153 [inline]
kmem_cache_alloc_noprof+0x154/0x3b0 mm/slub.c:4160
getname_kernel+0x52/0x370 fs/namei.c:250
kern_path_locked+0x19/0x50 fs/namei.c:2751
handle_remove+0xbb/0x790 drivers/base/devtmpfs.c:316
handle drivers/base/devtmpfs.c:386 [inline]
devtmpfs_work_loop+0x2fb/0x7d0 drivers/base/devtmpfs.c:399
devtmpfsd+0x4c/0x50 drivers/base/devtmpfs.c:441
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Freed by task 26:
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:582
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:2338 [inline]
slab_free mm/slub.c:4598 [inline]
kmem_cache_free+0x133/0x470 mm/slub.c:4700
putname+0x13c/0x180 fs/namei.c:296
kern_path_locked+0x37/0x50 fs/namei.c:2754
handle_remove+0xbb/0x790 drivers/base/devtmpfs.c:316
handle drivers/base/devtmpfs.c:386 [inline]
devtmpfs_work_loop+0x2fb/0x7d0 drivers/base/devtmpfs.c:399
devtmpfsd+0x4c/0x50 drivers/base/devtmpfs.c:441
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
The buggy address belongs to the object at ffff88812ce56600
which belongs to the cache names_cache of size 4096
The buggy address is located 2559 bytes to the right of
allocated 4096-byte region [ffff88812ce56600, ffff88812ce57600)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12ce50
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
anon flags: 0x200000000000040(head|node=0|zone=2)
page_type: f5(slab)
raw: 0200000000000040 ffff888100ae1140 0000000000000000 dead000000000001
raw: 0000000000000000 0000000000070007 00000001f5000000 0000000000000000
head: 0200000000000040 ffff888100ae1140 0000000000000000 dead000000000001
head: 0000000000000000 0000000000070007 00000001f5000000 0000000000000000
head: 0200000000000003 ffffea0004b39401 ffffffffffffffff 0000000000000000
head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000
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 5202, tgid 5202 (udevd), ts 1697745584305, free_ts 1697594265058
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1556
prep_new_page mm/page_alloc.c:1564 [inline]
get_page_from_freelist+0xe76/0x2b90 mm/page_alloc.c:3474
__alloc_pages_noprof+0x21c/0x22a0 mm/page_alloc.c:4751
alloc_pages_mpol_noprof+0xeb/0x400 mm/mempolicy.c:2265
alloc_slab_page mm/slub.c:2408 [inline]
allocate_slab mm/slub.c:2574 [inline]
new_slab+0x2c9/0x410 mm/slub.c:2627
___slab_alloc+0xd45/0x1750 mm/slub.c:3815
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3905
__slab_alloc_node mm/slub.c:3980 [inline]
slab_alloc_node mm/slub.c:4141 [inline]
kmem_cache_alloc_noprof+0x1fd/0x3b0 mm/slub.c:4160
getname_flags.part.0+0x4c/0x550 fs/namei.c:139
getname_flags include/linux/audit.h:322 [inline]
getname fs/namei.c:223 [inline]
__do_sys_unlink fs/namei.c:4635 [inline]
__se_sys_unlink fs/namei.c:4633 [inline]
__x64_sys_unlink+0xb0/0x110 fs/namei.c:4633
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 5229 tgid 5229 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_unref_page+0x661/0xe40 mm/page_alloc.c:2657
__put_partials+0x14c/0x170 mm/slub.c:3142
qlink_free mm/kasan/quarantine.c:163 [inline]
qlist_free_all+0x4e/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:4104 [inline]
slab_alloc_node mm/slub.c:4153 [inline]
kmem_cache_alloc_noprof+0x154/0x3b0 mm/slub.c:4160
getname_flags.part.0+0x4c/0x550 fs/namei.c:139
getname_flags include/linux/audit.h:322 [inline]
getname+0x8d/0xe0 fs/namei.c:223
do_sys_openat2+0x104/0x1e0 fs/open.c:1396
do_sys_open fs/open.c:1417 [inline]
__do_sys_openat fs/open.c:1433 [inline]
__se_sys_openat fs/open.c:1428 [inline]
__x64_sys_openat+0x175/0x210 fs/open.c:1428
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff88812ce57e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88812ce57f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88812ce57f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff88812ce58000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff88812ce58080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
----------------
Code disassembly (best guess):
0: 00 e8 add %ch,%al
2: 90 nop
3: de 27 fisubs (%rdi)
5: 00 9c 5b 81 e3 00 02 add %bl,0x200e381(%rbx,%rbx,2)
c: 00 00 add %al,(%rax)
e: 31 ff xor %edi,%edi
10: 48 89 de mov %rbx,%rsi
13: e8 1e 39 20 00 call 0x203936
18: 48 85 db test %rbx,%rbx
1b: 0f 85 55 01 00 00 jne 0x176
21: e8 a0 36 20 00 call 0x2036c6
26: fb sti
27: 4c 89 e0 mov %r12,%rax
* 2a: 48 c1 e8 03 shr $0x3,%rax <-- trapping instruction
2e: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1)
33: 0f 84 11 ff ff ff je 0xffffff4a
39: 4c 89 e7 mov %r12,%rdi
3c: e8 .byte 0xe8
3d: 25 .byte 0x25
3e: 41 rex.B
3f: 7a .byte 0x7a