* [syzbot] [input?] [usb?] KASAN: slab-out-of-bounds Read in mcp2221_raw_event
@ 2024-12-06 20:05 syzbot
2024-12-25 20:56 ` syzbot
` (2 more replies)
0 siblings, 3 replies; 5+ messages in thread
From: syzbot @ 2024-12-06 20:05 UTC (permalink / raw)
To: bentiss, jikos, linux-input, linux-kernel, linux-usb,
syzkaller-bugs
Hello,
syzbot found the following issue on:
HEAD commit: d8d936c51388 usb: storage: add a macro for the upper limit..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
console output: https://syzkaller.appspot.com/x/log.txt?x=138e1de8580000
kernel config: https://syzkaller.appspot.com/x/.config?x=9666422a569a9b7d
dashboard link: https://syzkaller.appspot.com/bug?extid=52c1a7d3e5b361ccd346
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/b5f0fe63d6bf/disk-d8d936c5.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/16c74d2e64c7/vmlinux-d8d936c5.xz
kernel image: https://storage.googleapis.com/syzbot-assets/00ab13339c70/bzImage-d8d936c5.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+52c1a7d3e5b361ccd346@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-out-of-bounds in mcp2221_raw_event+0xf98/0x1030 drivers/hid/hid-mcp2221.c:852
Read of size 1 at addr ffff888125653fff by task kworker/1:3/5238
CPU: 1 UID: 0 PID: 5238 Comm: kworker/1:3 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 legacy_dvb_usb_read_remote_control
Call Trace:
<IRQ>
__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
</IRQ>
<TASK>
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:ffffc9000211f8b0 EFLAGS: 00000293
RAX: ffffffff893a7798 RBX: 0000000000000000 RCX: ffffffff813b1bb2
RDX: ffff88810dbe1d40 RSI: ffffffff813b1bc0 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000005 R12: ffffffff893a7798
R13: ffffffff893a7740 R14: ffffc9000211f940 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
legacy_dvb_usb_read_remote_control+0x40d/0x500 drivers/media/usb/dvb-usb/dvb-usb-remote.c:124
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
</TASK>
Allocated by task 18002:
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
vma_lock_alloc kernel/fork.c:446 [inline]
vm_area_dup+0x51/0x160 kernel/fork.c:499
dup_mmap kernel/fork.c:697 [inline]
dup_mm kernel/fork.c:1695 [inline]
copy_mm kernel/fork.c:1744 [inline]
copy_process+0x76a1/0x8ba0 kernel/fork.c:2395
kernel_clone+0xfd/0x960 kernel/fork.c:2807
__do_sys_clone+0xba/0x100 kernel/fork.c:2950
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
Freed by task 20259:
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
vma_lock_free kernel/fork.c:458 [inline]
__vm_area_free+0x38/0x50 kernel/fork.c:514
remove_vma+0x154/0x1b0 mm/vma.c:385
exit_mmap+0x4e2/0xb20 mm/mmap.c:1691
__mmput kernel/fork.c:1353 [inline]
mmput+0xdb/0x430 kernel/fork.c:1375
exit_mm kernel/exit.c:570 [inline]
do_exit+0x9bf/0x2ce0 kernel/exit.c:925
do_group_exit+0xd3/0x2a0 kernel/exit.c:1087
get_signal+0x24ed/0x26c0 kernel/signal.c:3017
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x147/0x260 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
The buggy address belongs to the object at ffff888125653e58
which belongs to the cache vma_lock of size 152
The buggy address is located 271 bytes to the right of
allocated 152-byte region [ffff888125653e58, ffff888125653ef0)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x125653
memcg:ffff888112012101
flags: 0x200000000000000(node=0|zone=2)
page_type: f5(slab)
raw: 0200000000000000 ffff888100ad6c80 ffffea000469ff40 dead000000000008
raw: 0000000000000000 0000000000120012 00000001f5000000 ffff888112012101
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 19443, tgid 19443 (modprobe), ts 1744528990053, free_ts 1582817727208
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
vma_lock_alloc kernel/fork.c:446 [inline]
vm_area_alloc+0x107/0x1f0 kernel/fork.c:477
__mmap_new_vma mm/vma.c:2340 [inline]
__mmap_region+0xf13/0x24f0 mm/vma.c:2456
mmap_region+0x127/0x320 mm/mmap.c:1347
do_mmap+0xc00/0xfc0 mm/mmap.c:496
vm_mmap_pgoff+0x1ba/0x350 mm/util.c:580
ksys_mmap_pgoff+0x7d/0x5c0 mm/mmap.c:542
__do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline]
__se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline]
__x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
page last free pid 2961 tgid 2961 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
vfree+0x17a/0x890 mm/vmalloc.c:3382
kcov_put kernel/kcov.c:439 [inline]
kcov_put+0x2a/0x40 kernel/kcov.c:435
kcov_close+0xd/0x20 kernel/kcov.c:535
__fput+0x3f8/0xb60 fs/file_table.c:450
task_work_run+0x14e/0x250 kernel/task_work.c:239
exit_task_work include/linux/task_work.h:43 [inline]
do_exit+0xadd/0x2ce0 kernel/exit.c:938
do_group_exit+0xd3/0x2a0 kernel/exit.c:1087
get_signal+0x24ed/0x26c0 kernel/signal.c:3017
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x147/0x260 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
Memory state around the buggy address:
ffff888125653e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
ffff888125653f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888125653f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff888125654000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff888125654080: 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
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [syzbot] [input?] [usb?] KASAN: slab-out-of-bounds Read in mcp2221_raw_event
2024-12-06 20:05 [syzbot] [input?] [usb?] KASAN: slab-out-of-bounds Read in mcp2221_raw_event syzbot
@ 2024-12-25 20:56 ` syzbot
2025-02-10 3:03 ` syzbot
2025-07-26 20:41 ` syztest Arnaud Lecomte
2 siblings, 0 replies; 5+ messages in thread
From: syzbot @ 2024-12-25 20:56 UTC (permalink / raw)
To: bentiss, jikos, linux-input, linux-kernel, linux-usb,
syzkaller-bugs
syzbot has found a reproducer for the following issue on:
HEAD commit: d7123c77dc60 usb: gadget: f_tcm: Refactor goto check_condi..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
console output: https://syzkaller.appspot.com/x/log.txt?x=134c0cc4580000
kernel config: https://syzkaller.appspot.com/x/.config?x=c7df994a0b7c30a9
dashboard link: https://syzkaller.appspot.com/bug?extid=52c1a7d3e5b361ccd346
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=174c0cc4580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/ccb59f24626e/disk-d7123c77.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/b51b5c87b9dc/vmlinux-d7123c77.xz
kernel image: https://storage.googleapis.com/syzbot-assets/f66bf96bc8cc/bzImage-d7123c77.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+52c1a7d3e5b361ccd346@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-out-of-bounds in mcp2221_raw_event+0xf98/0x1030 drivers/hid/hid-mcp2221.c:852
Read of size 1 at addr ffff88811e03bfff by task kworker/1:2/2932
CPU: 1 UID: 0 PID: 2932 Comm: kworker/1:2 Not tainted 6.13.0-rc4-syzkaller-00068-gd7123c77dc60 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_power_efficient gc_worker
Call Trace:
<IRQ>
__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+0x17f7/0x3960 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:561
__do_softirq kernel/softirq.c:595 [inline]
invoke_softirq kernel/softirq.c:435 [inline]
__irq_exit_rcu+0xfa/0x160 kernel/softirq.c:662
irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
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
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__seqprop_spinlock_sequence include/linux/seqlock.h:227 [inline]
RIP: 0010:nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:345 [inline]
RIP: 0010:gc_worker+0x2e1/0x1760 net/netfilter/nf_conntrack_core.c:1534
Code: 00 00 48 c7 c7 28 51 56 8a e8 5b a6 2e fb 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 e9 d5 51 fb 48 85 db 58 0f 85 3d 10 00 00 <e8> 6a d3 51 fb eb 07 e8 63 d3 51 fb f3 90 44 8b 35 ca b8 4c 04 44
RSP: 0018:ffffc9000140fbc8 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8609a3fa
RDX: ffff88810732d7c0 RSI: ffffffff8609a409 RDI: 0000000000000007
RBP: ffff888112200000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000003 R12: 0000000000012f2e
R13: dffffc0000000000 R14: 0000000000025e5b R15: 0000000000040000
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
</TASK>
Allocated by task 2832:
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:4298 [inline]
__kmalloc_node_track_caller_noprof+0x20b/0x4c0 mm/slub.c:4317
kmalloc_reserve+0xef/0x2c0 net/core/skbuff.c:609
__alloc_skb+0x164/0x380 net/core/skbuff.c:678
alloc_skb include/linux/skbuff.h:1323 [inline]
alloc_skb_with_frags+0xe4/0x850 net/core/skbuff.c:6612
sock_alloc_send_pskb+0x7f1/0x980 net/core/sock.c:2881
unix_dgram_sendmsg+0x467/0x1920 net/unix/af_unix.c:2027
sock_sendmsg_nosec net/socket.c:711 [inline]
__sock_sendmsg net/socket.c:726 [inline]
__sys_sendto+0x488/0x4f0 net/socket.c:2197
__do_sys_sendto net/socket.c:2204 [inline]
__se_sys_sendto net/socket.c:2200 [inline]
__x64_sys_sendto+0xe0/0x1c0 net/socket.c:2200
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
Freed by task 2825:
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:2353 [inline]
slab_free mm/slub.c:4613 [inline]
kfree+0x130/0x470 mm/slub.c:4761
skb_kfree_head net/core/skbuff.c:1086 [inline]
skb_free_head+0x108/0x1d0 net/core/skbuff.c:1098
skb_release_data+0x760/0x910 net/core/skbuff.c:1125
skb_release_all net/core/skbuff.c:1190 [inline]
__kfree_skb net/core/skbuff.c:1204 [inline]
consume_skb net/core/skbuff.c:1436 [inline]
consume_skb+0xbf/0x100 net/core/skbuff.c:1430
__unix_dgram_recvmsg+0x81c/0xdd0 net/unix/af_unix.c:2521
unix_dgram_recvmsg+0xd0/0x110 net/unix/af_unix.c:2538
sock_recvmsg_nosec net/socket.c:1033 [inline]
sock_recvmsg+0x1f6/0x250 net/socket.c:1055
sock_read_iter+0x2bb/0x3b0 net/socket.c:1125
new_sync_read fs/read_write.c:484 [inline]
vfs_read+0xa4c/0xbe0 fs/read_write.c:565
ksys_read+0x207/0x250 fs/read_write.c:708
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
The buggy address belongs to the object at ffff88811e03bc00
which belongs to the cache kmalloc-cg-512 of size 512
The buggy address is located 511 bytes to the right of
allocated 512-byte region [ffff88811e03bc00, ffff88811e03be00)
The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11e038
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff88810334f001
anon flags: 0x200000000000040(head|node=0|zone=2)
page_type: f5(slab)
raw: 0200000000000040 ffff88810004f140 ffffea000473e200 dead000000000003
raw: 0000000000000000 0000000000100010 00000001f5000000 ffff88810334f001
head: 0200000000000040 ffff88810004f140 ffffea000473e200 dead000000000003
head: 0000000000000000 0000000000100010 00000001f5000000 ffff88810334f001
head: 0200000000000002 ffffea0004780e01 ffffffffffffffff 0000000000000000
head: 0000000000000004 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5837, tgid 5837 (udevd), ts 428785915799, free_ts 427670559123
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1558
prep_new_page mm/page_alloc.c:1566 [inline]
get_page_from_freelist+0xe76/0x2b90 mm/page_alloc.c:3476
__alloc_pages_noprof+0x21c/0x22a0 mm/page_alloc.c:4753
alloc_pages_mpol_noprof+0xeb/0x400 mm/mempolicy.c:2269
alloc_slab_page mm/slub.c:2423 [inline]
allocate_slab mm/slub.c:2589 [inline]
new_slab+0x2c9/0x410 mm/slub.c:2642
___slab_alloc+0xd1d/0x16e0 mm/slub.c:3830
__slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3920
__slab_alloc_node mm/slub.c:3995 [inline]
slab_alloc_node mm/slub.c:4156 [inline]
__do_kmalloc_node mm/slub.c:4297 [inline]
__kmalloc_node_track_caller_noprof+0x157/0x4c0 mm/slub.c:4317
kmalloc_reserve+0xef/0x2c0 net/core/skbuff.c:609
__alloc_skb+0x164/0x380 net/core/skbuff.c:678
alloc_skb include/linux/skbuff.h:1323 [inline]
alloc_skb_with_frags+0xe4/0x850 net/core/skbuff.c:6612
sock_alloc_send_pskb+0x7f1/0x980 net/core/sock.c:2881
unix_dgram_sendmsg+0x467/0x1920 net/unix/af_unix.c:2027
sock_sendmsg_nosec net/socket.c:711 [inline]
__sock_sendmsg net/socket.c:726 [inline]
sock_write_iter+0x4fe/0x5b0 net/socket.c:1147
new_sync_write fs/read_write.c:586 [inline]
vfs_write+0x5ae/0x1150 fs/read_write.c:679
ksys_write+0x207/0x250 fs/read_write.c:731
page last free pid 2843 tgid 2843 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:2659
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:4119 [inline]
slab_alloc_node mm/slub.c:4168 [inline]
kmem_cache_alloc_noprof+0x154/0x3b0 mm/slub.c:4175
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:
ffff88811e03be80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff88811e03bf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88811e03bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
^
ffff88811e03c000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff88811e03c080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
----------------
Code disassembly (best guess):
0: 00 00 add %al,(%rax)
2: 48 c7 c7 28 51 56 8a mov $0xffffffff8a565128,%rdi
9: e8 5b a6 2e fb call 0xfb2ea669
e: 9c pushf
f: 5b pop %rbx
10: 81 e3 00 02 00 00 and $0x200,%ebx
16: 31 ff xor %edi,%edi
18: 48 89 de mov %rbx,%rsi
1b: e8 e9 d5 51 fb call 0xfb51d609
20: 48 85 db test %rbx,%rbx
23: 58 pop %rax
24: 0f 85 3d 10 00 00 jne 0x1067
* 2a: e8 6a d3 51 fb call 0xfb51d399 <-- trapping instruction
2f: eb 07 jmp 0x38
31: e8 63 d3 51 fb call 0xfb51d399
36: f3 90 pause
38: 44 8b 35 ca b8 4c 04 mov 0x44cb8ca(%rip),%r14d # 0x44cb909
3f: 44 rex.R
---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [syzbot] [input?] [usb?] KASAN: slab-out-of-bounds Read in mcp2221_raw_event
2024-12-06 20:05 [syzbot] [input?] [usb?] KASAN: slab-out-of-bounds Read in mcp2221_raw_event syzbot
2024-12-25 20:56 ` syzbot
@ 2025-02-10 3:03 ` syzbot
2025-07-26 20:41 ` syztest Arnaud Lecomte
2 siblings, 0 replies; 5+ messages in thread
From: syzbot @ 2025-02-10 3:03 UTC (permalink / raw)
To: bentiss, jikos, linux-input, linux-kernel, linux-usb,
syzkaller-bugs
syzbot has found a reproducer for the following issue on:
HEAD commit: 9682c35ff6ec usb: typec: thunderbolt: Remove IS_ERR check ..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
console output: https://syzkaller.appspot.com/x/log.txt?x=10b0c2a4580000
kernel config: https://syzkaller.appspot.com/x/.config?x=ed7570f7f6046a71
dashboard link: https://syzkaller.appspot.com/bug?extid=52c1a7d3e5b361ccd346
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13c93b18580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=124a6bdf980000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/3c194e311f90/disk-9682c35f.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/daad45c8e7c8/vmlinux-9682c35f.xz
kernel image: https://storage.googleapis.com/syzbot-assets/8a4e74467d7e/bzImage-9682c35f.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+52c1a7d3e5b361ccd346@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: null-ptr-deref in mcp2221_raw_event+0xc1f/0x1030 drivers/hid/hid-mcp2221.c:818
Write of size 141 at addr 0000000000000000 by task swapper/1/0
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.14.0-rc1-syzkaller-g9682c35ff6ec #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
kasan_report+0xd9/0x110 mm/kasan/report.c:602
check_region_inline mm/kasan/generic.c:183 [inline]
kasan_check_range+0xef/0x1a0 mm/kasan/generic.c:189
__asan_memcpy+0x3c/0x60 mm/kasan/shadow.c:106
mcp2221_raw_event+0xc1f/0x1030 drivers/hid/hid-mcp2221.c:818
__hid_input_report.constprop.0+0x312/0x440 drivers/hid/hid-core.c:2113
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+0x17f7/0x3960 drivers/usb/gadget/udc/dummy_hcd.c:1994
__run_hrtimer kernel/time/hrtimer.c:1738 [inline]
__hrtimer_run_queues+0x20a/0xae0 kernel/time/hrtimer.c:1802
hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1819
handle_softirqs+0x206/0x8d0 kernel/softirq.c:561
__do_softirq kernel/softirq.c:595 [inline]
invoke_softirq kernel/softirq.c:435 [inline]
__irq_exit_rcu+0xfa/0x160 kernel/softirq.c:662
irq_exit_rcu+0x9/0x30 kernel/softirq.c:678
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
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:92 [inline]
RIP: 0010:acpi_safe_halt+0x1a/0x20 drivers/acpi/processor_idle.c:112
Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 65 48 8b 05 78 dd ec 78 48 8b 00 a8 08 75 0c 66 90 0f 00 2d 48 9d 39 00 fb f4 <fa> c3 cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000014fd58 EFLAGS: 00000246
RAX: 0000000000004000 RBX: 0000000000000001 RCX: ffffffff8716c579
RDX: 0000000000000001 RSI: ffff888106a98800 RDI: ffff888106a98864
RBP: ffff888106a98864 R08: 0000000000000001 R09: ffffed103eb26f35
R10: ffff8881f59379ab R11: 0000000000000000 R12: ffff8881013d8000
R13: ffffffff8934ea40 R14: 0000000000000001 R15: 0000000000000000
acpi_idle_enter+0xc5/0x160 drivers/acpi/processor_idle.c:699
cpuidle_enter_state+0xaa/0x4f0 drivers/cpuidle/cpuidle.c:268
cpuidle_enter+0x4e/0xa0 drivers/cpuidle/cpuidle.c:389
cpuidle_idle_call kernel/sched/idle.c:230 [inline]
do_idle+0x310/0x3f0 kernel/sched/idle.c:325
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:423
start_secondary+0x222/0x2b0 arch/x86/kernel/smpboot.c:315
common_startup_64+0x12c/0x138
</TASK>
==================================================================
----------------
Code disassembly (best guess):
0: 90 nop
1: 90 nop
2: 90 nop
3: 90 nop
4: 90 nop
5: 90 nop
6: 90 nop
7: 90 nop
8: 90 nop
9: 90 nop
a: 90 nop
b: 90 nop
c: 90 nop
d: 90 nop
e: 90 nop
f: 90 nop
10: 65 48 8b 05 78 dd ec mov %gs:0x78ecdd78(%rip),%rax # 0x78ecdd90
17: 78
18: 48 8b 00 mov (%rax),%rax
1b: a8 08 test $0x8,%al
1d: 75 0c jne 0x2b
1f: 66 90 xchg %ax,%ax
21: 0f 00 2d 48 9d 39 00 verw 0x399d48(%rip) # 0x399d70
28: fb sti
29: f4 hlt
* 2a: fa cli <-- trapping instruction
2b: c3 ret
2c: cc int3
2d: cc int3
2e: cc int3
2f: cc int3
30: 90 nop
31: 90 nop
32: 90 nop
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
3f: 90 nop
---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
^ permalink raw reply [flat|nested] 5+ messages in thread
* syztest
2024-12-06 20:05 [syzbot] [input?] [usb?] KASAN: slab-out-of-bounds Read in mcp2221_raw_event syzbot
2024-12-25 20:56 ` syzbot
2025-02-10 3:03 ` syzbot
@ 2025-07-26 20:41 ` Arnaud Lecomte
2025-07-26 22:03 ` [syzbot] [usb?] [input?] KASAN: slab-out-of-bounds Read in mcp2221_raw_event syzbot
2 siblings, 1 reply; 5+ messages in thread
From: Arnaud Lecomte @ 2025-07-26 20:41 UTC (permalink / raw)
To: syzbot+52c1a7d3e5b361ccd346
Cc: linux-input, linux-kernel, linux-usb, syzkaller-bugs
#syz test
--- a/drivers/hid/hid-mcp2221.c
+++ b/drivers/hid/hid-mcp2221.c
@@ -814,6 +814,10 @@ static int mcp2221_raw_event(struct hid_device *hdev,
}
if (data[2] == MCP2221_I2C_READ_COMPL ||
data[2] == MCP2221_I2C_READ_PARTIAL) {
+ if (!mcp->rxbuf || mcp->rxbuf_idx < 0 || data[3] > 60) {
+ mcp->status = -EINVAL;
+ break;
+ }
buf = mcp->rxbuf;
memcpy(&buf[mcp->rxbuf_idx], &data[4], data[3]);
mcp->rxbuf_idx = mcp->rxbuf_idx + data[3];
--
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [syzbot] [usb?] [input?] KASAN: slab-out-of-bounds Read in mcp2221_raw_event
2025-07-26 20:41 ` syztest Arnaud Lecomte
@ 2025-07-26 22:03 ` syzbot
0 siblings, 0 replies; 5+ messages in thread
From: syzbot @ 2025-07-26 22:03 UTC (permalink / raw)
To: contact, linux-input, linux-kernel, linux-usb, syzkaller-bugs
Hello,
syzbot has tested the proposed patch and the reproducer did not trigger any issue:
Reported-by: syzbot+52c1a7d3e5b361ccd346@syzkaller.appspotmail.com
Tested-by: syzbot+52c1a7d3e5b361ccd346@syzkaller.appspotmail.com
Tested on:
commit: 51d4b0a4 usb: musb: omap2430: clean up probe error han..
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
console output: https://syzkaller.appspot.com/x/log.txt?x=103028a2580000
kernel config: https://syzkaller.appspot.com/x/.config?x=b3af2d4b01cd6138
dashboard link: https://syzkaller.appspot.com/bug?extid=52c1a7d3e5b361ccd346
compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
patch: https://syzkaller.appspot.com/x/patch.diff?x=16574034580000
Note: testing is done by a robot and is best-effort only.
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2025-07-26 22:03 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2024-12-06 20:05 [syzbot] [input?] [usb?] KASAN: slab-out-of-bounds Read in mcp2221_raw_event syzbot
2024-12-25 20:56 ` syzbot
2025-02-10 3:03 ` syzbot
2025-07-26 20:41 ` syztest Arnaud Lecomte
2025-07-26 22:03 ` [syzbot] [usb?] [input?] KASAN: slab-out-of-bounds Read in mcp2221_raw_event syzbot
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).