From: syzbot <syzbot+8258d5439c49d4c35f43@syzkaller.appspotmail.com>
To: gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org,
linux-usb@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [usb?] KASAN: slab-out-of-bounds Read in mon_copy_to_buff
Date: Mon, 07 Jul 2025 08:05:27 -0700 [thread overview]
Message-ID: <686be237.a70a0220.29fe6c.0b0c.GAE@google.com> (raw)
In-Reply-To: <686bb229.a00a0220.c7b3.0081.GAE@google.com>
syzbot has found a reproducer for the following issue on:
HEAD commit: d7b8f8e20813 Linux 6.16-rc5
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=17e89582580000
kernel config: https://syzkaller.appspot.com/x/.config?x=f51185bd4f40ad44
dashboard link: https://syzkaller.appspot.com/bug?extid=8258d5439c49d4c35f43
compiler: gcc (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11b3cbd4580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11b19f70580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/f933e0e4a6c5/disk-d7b8f8e2.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/a82be954c91b/vmlinux-d7b8f8e2.xz
kernel image: https://storage.googleapis.com/syzbot-assets/66dbc3de1264/bzImage-d7b8f8e2.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8258d5439c49d4c35f43@syzkaller.appspotmail.com
microsoft 0003:045E:07DA.0001: unknown main item tag 0x0
microsoft 0003:045E:07DA.0001: ignoring exceeding usage max
==================================================================
BUG: KASAN: slab-out-of-bounds in mon_copy_to_buff+0xc2/0x170 drivers/usb/mon/mon_bin.c:252
Read of size 3904 at addr ffff8880216bc6e1 by task kworker/0:2/1204
CPU: 0 UID: 0 PID: 1204 Comm: kworker/0:2 Not tainted 6.16.0-rc5-syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: usb_hub_wq hub_event
Call Trace:
<TASK>
__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
check_region_inline mm/kasan/generic.c:183 [inline]
kasan_check_range+0x100/0x1b0 mm/kasan/generic.c:189
__asan_memcpy+0x23/0x60 mm/kasan/shadow.c:105
mon_copy_to_buff+0xc2/0x170 drivers/usb/mon/mon_bin.c:252
mon_bin_get_data drivers/usb/mon/mon_bin.c:420 [inline]
mon_bin_event+0x1071/0x2050 drivers/usb/mon/mon_bin.c:606
mon_bus_submit+0xcf/0x140 drivers/usb/mon/mon_main.c:89
usbmon_urb_submit include/linux/usb/hcd.h:724 [inline]
usb_hcd_submit_urb+0x12d/0x1c60 drivers/usb/core/hcd.c:1518
usb_submit_urb+0x87c/0x1790 drivers/usb/core/urb.c:581
usb_start_wait_urb+0x104/0x4b0 drivers/usb/core/message.c:59
usb_internal_control_msg drivers/usb/core/message.c:103 [inline]
usb_control_msg+0x326/0x4a0 drivers/usb/core/message.c:154
usbhid_set_raw_report drivers/hid/usbhid/hid-core.c:928 [inline]
usbhid_raw_request+0x58f/0x700 drivers/hid/usbhid/hid-core.c:1299
__hid_request+0x296/0x3c0 drivers/hid/hid-core.c:1989
hidinput_change_resolution_multipliers drivers/hid/hid-input.c:1950 [inline]
hidinput_connect+0x1ada/0x2bd0 drivers/hid/hid-input.c:2327
hid_connect+0x13f3/0x1a60 drivers/hid/hid-core.c:2239
hid_hw_start drivers/hid/hid-core.c:2354 [inline]
hid_hw_start+0xaa/0x140 drivers/hid/hid-core.c:2345
ms_probe+0x195/0x500 drivers/hid/hid-microsoft.c:391
__hid_device_probe drivers/hid/hid-core.c:2724 [inline]
hid_device_probe+0x360/0x720 drivers/hid/hid-core.c:2761
call_driver_probe drivers/base/dd.c:579 [inline]
really_probe+0x23e/0xa90 drivers/base/dd.c:657
__driver_probe_device+0x1de/0x440 drivers/base/dd.c:799
driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:829
__device_attach_driver+0x1df/0x310 drivers/base/dd.c:957
bus_for_each_drv+0x156/0x1e0 drivers/base/bus.c:462
__device_attach+0x1e4/0x4b0 drivers/base/dd.c:1029
bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:537
device_add+0x1148/0x1a70 drivers/base/core.c:3692
hid_add_device+0x373/0xa60 drivers/hid/hid-core.c:2907
usbhid_probe+0xd38/0x13f0 drivers/hid/usbhid/hid-core.c:1435
usb_probe_interface+0x303/0x9c0 drivers/usb/core/driver.c:396
call_driver_probe drivers/base/dd.c:579 [inline]
really_probe+0x23e/0xa90 drivers/base/dd.c:657
__driver_probe_device+0x1de/0x440 drivers/base/dd.c:799
driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:829
__device_attach_driver+0x1df/0x310 drivers/base/dd.c:957
bus_for_each_drv+0x156/0x1e0 drivers/base/bus.c:462
__device_attach+0x1e4/0x4b0 drivers/base/dd.c:1029
bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:537
device_add+0x1148/0x1a70 drivers/base/core.c:3692
usb_set_configuration+0x1187/0x1e20 drivers/usb/core/message.c:2210
usb_generic_driver_probe+0xb1/0x110 drivers/usb/core/generic.c:250
usb_probe_device+0xef/0x3e0 drivers/usb/core/driver.c:291
call_driver_probe drivers/base/dd.c:579 [inline]
really_probe+0x23e/0xa90 drivers/base/dd.c:657
__driver_probe_device+0x1de/0x440 drivers/base/dd.c:799
driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:829
__device_attach_driver+0x1df/0x310 drivers/base/dd.c:957
bus_for_each_drv+0x156/0x1e0 drivers/base/bus.c:462
__device_attach+0x1e4/0x4b0 drivers/base/dd.c:1029
bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:537
device_add+0x1148/0x1a70 drivers/base/core.c:3692
usb_new_device+0xd07/0x1a20 drivers/usb/core/hub.c:2694
hub_port_connect drivers/usb/core/hub.c:5566 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5706 [inline]
port_event drivers/usb/core/hub.c:5866 [inline]
hub_event+0x2eb7/0x4fa0 drivers/usb/core/hub.c:5948
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
Allocated by task 1204:
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+0xaa/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4328 [inline]
__kmalloc_noprof+0x223/0x510 mm/slub.c:4340
__hid_request+0x2c/0x3c0 drivers/hid/hid-core.c:1980
hidinput_change_resolution_multipliers drivers/hid/hid-input.c:1950 [inline]
hidinput_connect+0x1ada/0x2bd0 drivers/hid/hid-input.c:2327
hid_connect+0x13f3/0x1a60 drivers/hid/hid-core.c:2239
hid_hw_start drivers/hid/hid-core.c:2354 [inline]
hid_hw_start+0xaa/0x140 drivers/hid/hid-core.c:2345
ms_probe+0x195/0x500 drivers/hid/hid-microsoft.c:391
__hid_device_probe drivers/hid/hid-core.c:2724 [inline]
hid_device_probe+0x360/0x720 drivers/hid/hid-core.c:2761
call_driver_probe drivers/base/dd.c:579 [inline]
really_probe+0x23e/0xa90 drivers/base/dd.c:657
__driver_probe_device+0x1de/0x440 drivers/base/dd.c:799
driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:829
__device_attach_driver+0x1df/0x310 drivers/base/dd.c:957
bus_for_each_drv+0x156/0x1e0 drivers/base/bus.c:462
__device_attach+0x1e4/0x4b0 drivers/base/dd.c:1029
bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:537
device_add+0x1148/0x1a70 drivers/base/core.c:3692
hid_add_device+0x373/0xa60 drivers/hid/hid-core.c:2907
usbhid_probe+0xd38/0x13f0 drivers/hid/usbhid/hid-core.c:1435
usb_probe_interface+0x303/0x9c0 drivers/usb/core/driver.c:396
call_driver_probe drivers/base/dd.c:579 [inline]
really_probe+0x23e/0xa90 drivers/base/dd.c:657
__driver_probe_device+0x1de/0x440 drivers/base/dd.c:799
driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:829
__device_attach_driver+0x1df/0x310 drivers/base/dd.c:957
bus_for_each_drv+0x156/0x1e0 drivers/base/bus.c:462
__device_attach+0x1e4/0x4b0 drivers/base/dd.c:1029
bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:537
device_add+0x1148/0x1a70 drivers/base/core.c:3692
usb_set_configuration+0x1187/0x1e20 drivers/usb/core/message.c:2210
usb_generic_driver_probe+0xb1/0x110 drivers/usb/core/generic.c:250
usb_probe_device+0xef/0x3e0 drivers/usb/core/driver.c:291
call_driver_probe drivers/base/dd.c:579 [inline]
really_probe+0x23e/0xa90 drivers/base/dd.c:657
__driver_probe_device+0x1de/0x440 drivers/base/dd.c:799
driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:829
__device_attach_driver+0x1df/0x310 drivers/base/dd.c:957
bus_for_each_drv+0x156/0x1e0 drivers/base/bus.c:462
__device_attach+0x1e4/0x4b0 drivers/base/dd.c:1029
bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:537
device_add+0x1148/0x1a70 drivers/base/core.c:3692
usb_new_device+0xd07/0x1a20 drivers/usb/core/hub.c:2694
hub_port_connect drivers/usb/core/hub.c:5566 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5706 [inline]
port_event drivers/usb/core/hub.c:5866 [inline]
hub_event+0x2eb7/0x4fa0 drivers/usb/core/hub.c:5948
process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
process_scheduled_works kernel/workqueue.c:3321 [inline]
worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
The buggy address belongs to the object at ffff8880216bc6e0
which belongs to the cache kmalloc-8 of size 8
The buggy address is located 1 bytes inside of
allocated 7-byte region [ffff8880216bc6e0, ffff8880216bc6e7)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x216bc
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801b841500 ffffea00009fbac0 dead000000000002
raw: 0000000000000000 0000000080800080 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 1, tgid 1 (swapper/0), ts 2412854036, free_ts 2374376433
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+0x1321/0x3890 mm/page_alloc.c:3669
__alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:4959
alloc_pages_mpol+0x1fb/0x550 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+0xd9c/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]
__kmalloc_noprof+0x2f2/0x510 mm/slub.c:4340
kmalloc_noprof include/linux/slab.h:909 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
acpi_ns_internalize_name+0x144/0x220 drivers/acpi/acpica/nsutils.c:331
acpi_ns_get_node_unlocked+0x163/0x310 drivers/acpi/acpica/nsutils.c:666
acpi_ns_get_node+0x4c/0x70 drivers/acpi/acpica/nsutils.c:726
acpi_get_handle+0x105/0x270 drivers/acpi/acpica/nsxfname.c:98
acpi_has_method+0x7a/0xc0 drivers/acpi/utils.c:672
acpi_show_attr drivers/acpi/device_sysfs.c:560 [inline]
acpi_attr_is_visible+0x435/0x540 drivers/acpi/device_sysfs.c:588
create_files fs/sysfs/group.c:65 [inline]
internal_create_group+0x501/0xf30 fs/sysfs/group.c:183
internal_create_groups+0x9d/0x150 fs/sysfs/group.c:223
page last free pid 1 tgid 1 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1248 [inline]
__free_frozen_pages+0x7fe/0x1180 mm/page_alloc.c:2706
__kmem_cache_do_shrink+0x30b/0x380 mm/slub.c:6137
acpi_os_purge_cache+0x15/0x20 drivers/acpi/osl.c:1605
acpi_purge_cached_objects+0x86/0x100 drivers/acpi/acpica/utxface.c:239
acpi_initialize_objects+0x47/0xa0 drivers/acpi/acpica/utxfinit.c:250
acpi_bus_init drivers/acpi/bus.c:1367 [inline]
acpi_init+0x168/0xb60 drivers/acpi/bus.c:1456
do_one_initcall+0x120/0x6e0 init/main.c:1274
do_initcall_level init/main.c:1336 [inline]
do_initcalls init/main.c:1352 [inline]
do_basic_setup init/main.c:1371 [inline]
kernel_init_freeable+0x5c2/0x900 init/main.c:1584
kernel_init+0x1c/0x2b0 init/main.c:1474
ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Memory state around the buggy address:
ffff8880216bc580: fa fc fc fc fa fc fc fc 00 fc fc fc fa fc fc fc
ffff8880216bc600: 00 fc fc fc 00 fc fc fc fa fc fc fc 00 fc fc fc
>ffff8880216bc680: fa fc fc fc fa fc fc fc 00 fc fc fc 07 fc fc fc
^
ffff8880216bc700: 00 fc fc fc fa fc fc fc fa fc fc fc fa fc fc fc
ffff8880216bc780: fa fc fc fc fa fc fc fc fa fc fc fc fa fc fc fc
==================================================================
---
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.
next prev parent reply other threads:[~2025-07-07 15:05 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-07 11:40 [syzbot] [usb?] KASAN: slab-out-of-bounds Read in mon_copy_to_buff syzbot
2025-07-07 15:05 ` syzbot [this message]
2025-07-07 18:09 ` Alan Stern
2025-07-07 18:41 ` syzbot
2025-07-07 19:18 ` Alan Stern
2025-07-07 19:48 ` syzbot
2025-07-09 15:28 ` Alan Stern
2025-07-09 15:56 ` syzbot
2025-07-09 17:52 ` Alan Stern
2025-07-09 18:29 ` syzbot
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