* [syzbot] [usb?] KASAN: slab-out-of-bounds Read in mon_bin_event
@ 2025-07-02 17:42 syzbot
2025-07-03 4:34 ` Hillf Danton
0 siblings, 1 reply; 5+ messages in thread
From: syzbot @ 2025-07-02 17:42 UTC (permalink / raw)
To: gregkh, linux-kernel, linux-usb, syzkaller-bugs
Hello,
syzbot found the following issue on:
HEAD commit: 1343433ed389 Add linux-next specific files for 20250630
git tree: linux-next
console+strace: https://syzkaller.appspot.com/x/log.txt?x=1370d770580000
kernel config: https://syzkaller.appspot.com/x/.config?x=66357ac5b0466f16
dashboard link: https://syzkaller.appspot.com/bug?extid=86b6d7c8bcc66747c505
compiler: Debian clang version 20.1.6 (++20250514063057+1e4d39e07757-1~exp1~20250514183223.118), Debian LLD 20.1.6
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=129b2ebc580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1770d770580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/b005e1db0f8c/disk-1343433e.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/cb3aa8bfd514/vmlinux-1343433e.xz
kernel image: https://storage.googleapis.com/syzbot-assets/e01227599a09/bzImage-1343433e.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+86b6d7c8bcc66747c505@syzkaller.appspotmail.com
usb 1-1: config 0 descriptor??
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 drivers/usb/mon/mon_bin.c:252 [inline]
BUG: KASAN: slab-out-of-bounds in mon_bin_get_data drivers/usb/mon/mon_bin.c:420 [inline]
BUG: KASAN: slab-out-of-bounds in mon_bin_event+0x1211/0x2250 drivers/usb/mon/mon_bin.c:606
Read of size 832 at addr ffff88802888f1e1 by task kworker/0:2/979
CPU: 0 UID: 0 PID: 979 Comm: kworker/0:2 Not tainted 6.16.0-rc4-next-20250630-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_lvl+0x189/0x250 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xd2/0x2b0 mm/kasan/report.c:521
kasan_report+0x118/0x150 mm/kasan/report.c:634
check_region_inline mm/kasan/generic.c:-1 [inline]
kasan_check_range+0x2b0/0x2c0 mm/kasan/generic.c:189
__asan_memcpy+0x29/0x70 mm/kasan/shadow.c:105
mon_copy_to_buff drivers/usb/mon/mon_bin.c:252 [inline]
mon_bin_get_data drivers/usb/mon/mon_bin.c:420 [inline]
mon_bin_event+0x1211/0x2250 drivers/usb/mon/mon_bin.c:606
mon_bus_submit drivers/usb/mon/mon_main.c:89 [inline]
mon_submit+0x196/0x210 drivers/usb/mon/mon_main.c:100
usbmon_urb_submit include/linux/usb/hcd.h:724 [inline]
usb_hcd_submit_urb+0x11d/0x1aa0 drivers/usb/core/hcd.c:1518
usb_start_wait_urb+0x114/0x4c0 drivers/usb/core/message.c:59
usb_internal_control_msg drivers/usb/core/message.c:103 [inline]
usb_control_msg+0x232/0x3e0 drivers/usb/core/message.c:154
usbhid_raw_request+0x3cd/0x4e0 drivers/hid/usbhid/hid-core.c:-1
__hid_request+0x1c1/0x370 drivers/hid/hid-core.c:1989
hidinput_change_resolution_multipliers drivers/hid/hid-input.c:1950 [inline]
hidinput_connect+0x218a/0x3030 drivers/hid/hid-input.c:2327
hid_connect+0x499/0x19a0 drivers/hid/hid-core.c:2239
hid_hw_start+0xa8/0x120 drivers/hid/hid-core.c:2357
ms_probe+0x180/0x430 drivers/hid/hid-microsoft.c:391
__hid_device_probe drivers/hid/hid-core.c:2727 [inline]
hid_device_probe+0x39d/0x710 drivers/hid/hid-core.c:2764
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x26d/0x9a0 drivers/base/dd.c:657
__driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:799
driver_probe_device+0x4f/0x430 drivers/base/dd.c:829
__device_attach_driver+0x2ce/0x530 drivers/base/dd.c:957
bus_for_each_drv+0x24e/0x2e0 drivers/base/bus.c:462
__device_attach+0x2b8/0x400 drivers/base/dd.c:1029
bus_probe_device+0x185/0x260 drivers/base/bus.c:537
device_add+0x7b6/0xb50 drivers/base/core.c:3691
hid_add_device+0x398/0x540 drivers/hid/hid-core.c:2910
usbhid_probe+0xe13/0x12a0 drivers/hid/usbhid/hid-core.c:1435
usb_probe_interface+0x634/0xbf0 drivers/usb/core/driver.c:396
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x26d/0x9a0 drivers/base/dd.c:657
__driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:799
driver_probe_device+0x4f/0x430 drivers/base/dd.c:829
__device_attach_driver+0x2ce/0x530 drivers/base/dd.c:957
bus_for_each_drv+0x24e/0x2e0 drivers/base/bus.c:462
__device_attach+0x2b8/0x400 drivers/base/dd.c:1029
bus_probe_device+0x185/0x260 drivers/base/bus.c:537
device_add+0x7b6/0xb50 drivers/base/core.c:3691
usb_set_configuration+0x1a87/0x20e0 drivers/usb/core/message.c:2210
usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250
usb_probe_device+0x1c4/0x390 drivers/usb/core/driver.c:291
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x26d/0x9a0 drivers/base/dd.c:657
__driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:799
driver_probe_device+0x4f/0x430 drivers/base/dd.c:829
__device_attach_driver+0x2ce/0x530 drivers/base/dd.c:957
bus_for_each_drv+0x24e/0x2e0 drivers/base/bus.c:462
__device_attach+0x2b8/0x400 drivers/base/dd.c:1029
bus_probe_device+0x185/0x260 drivers/base/bus.c:537
device_add+0x7b6/0xb50 drivers/base/core.c:3691
usb_new_device+0xa39/0x16f0 drivers/usb/core/hub.c:2699
hub_port_connect drivers/usb/core/hub.c:5571 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5711 [inline]
port_event drivers/usb/core/hub.c:5871 [inline]
hub_event+0x2941/0x4a00 drivers/usb/core/hub.c:5953
process_one_work kernel/workqueue.c:3239 [inline]
process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3322
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3403
kthread+0x70e/0x8a0 kernel/kthread.c:463
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
Allocated by task 979:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4365 [inline]
__kmalloc_noprof+0x27a/0x4f0 mm/slub.c:4377
kmalloc_noprof include/linux/slab.h:909 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
hid_alloc_report_buf drivers/hid/hid-core.c:1890 [inline]
__hid_request+0x94/0x370 drivers/hid/hid-core.c:1980
hidinput_change_resolution_multipliers drivers/hid/hid-input.c:1950 [inline]
hidinput_connect+0x218a/0x3030 drivers/hid/hid-input.c:2327
hid_connect+0x499/0x19a0 drivers/hid/hid-core.c:2239
hid_hw_start+0xa8/0x120 drivers/hid/hid-core.c:2357
ms_probe+0x180/0x430 drivers/hid/hid-microsoft.c:391
__hid_device_probe drivers/hid/hid-core.c:2727 [inline]
hid_device_probe+0x39d/0x710 drivers/hid/hid-core.c:2764
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x26d/0x9a0 drivers/base/dd.c:657
__driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:799
driver_probe_device+0x4f/0x430 drivers/base/dd.c:829
__device_attach_driver+0x2ce/0x530 drivers/base/dd.c:957
bus_for_each_drv+0x24e/0x2e0 drivers/base/bus.c:462
__device_attach+0x2b8/0x400 drivers/base/dd.c:1029
bus_probe_device+0x185/0x260 drivers/base/bus.c:537
device_add+0x7b6/0xb50 drivers/base/core.c:3691
hid_add_device+0x398/0x540 drivers/hid/hid-core.c:2910
usbhid_probe+0xe13/0x12a0 drivers/hid/usbhid/hid-core.c:1435
usb_probe_interface+0x634/0xbf0 drivers/usb/core/driver.c:396
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x26d/0x9a0 drivers/base/dd.c:657
__driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:799
driver_probe_device+0x4f/0x430 drivers/base/dd.c:829
__device_attach_driver+0x2ce/0x530 drivers/base/dd.c:957
bus_for_each_drv+0x24e/0x2e0 drivers/base/bus.c:462
__device_attach+0x2b8/0x400 drivers/base/dd.c:1029
bus_probe_device+0x185/0x260 drivers/base/bus.c:537
device_add+0x7b6/0xb50 drivers/base/core.c:3691
usb_set_configuration+0x1a87/0x20e0 drivers/usb/core/message.c:2210
usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250
usb_probe_device+0x1c4/0x390 drivers/usb/core/driver.c:291
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x26d/0x9a0 drivers/base/dd.c:657
__driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:799
driver_probe_device+0x4f/0x430 drivers/base/dd.c:829
__device_attach_driver+0x2ce/0x530 drivers/base/dd.c:957
bus_for_each_drv+0x24e/0x2e0 drivers/base/bus.c:462
__device_attach+0x2b8/0x400 drivers/base/dd.c:1029
bus_probe_device+0x185/0x260 drivers/base/bus.c:537
device_add+0x7b6/0xb50 drivers/base/core.c:3691
usb_new_device+0xa39/0x16f0 drivers/usb/core/hub.c:2699
hub_port_connect drivers/usb/core/hub.c:5571 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5711 [inline]
port_event drivers/usb/core/hub.c:5871 [inline]
hub_event+0x2941/0x4a00 drivers/usb/core/hub.c:5953
process_one_work kernel/workqueue.c:3239 [inline]
process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3322
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3403
kthread+0x70e/0x8a0 kernel/kthread.c:463
ret_from_fork+0x3fc/0x770 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 ffff88802888f1e0
which belongs to the cache kmalloc-8 of size 8
The buggy address is located 1 bytes inside of
allocated 7-byte region [ffff88802888f1e0, ffff88802888f1e7)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2888f
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801a841500 dead000000000100 dead000000000122
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 0x52c00(GFP_NOIO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 1, tgid 1 (swapper/0), ts 15217600491, free_ts 13475963319
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1848
prep_new_page mm/page_alloc.c:1856 [inline]
get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3855
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5145
alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2419
alloc_slab_page mm/slub.c:2487 [inline]
allocate_slab+0x8a/0x370 mm/slub.c:2655
new_slab mm/slub.c:2709 [inline]
___slab_alloc+0xbeb/0x1410 mm/slub.c:3891
__slab_alloc mm/slub.c:3981 [inline]
__slab_alloc_node mm/slub.c:4056 [inline]
slab_alloc_node mm/slub.c:4217 [inline]
__kmalloc_cache_noprof+0x296/0x3d0 mm/slub.c:4391
kmalloc_noprof include/linux/slab.h:905 [inline]
usb_control_msg+0x73/0x3e0 drivers/usb/core/message.c:144
usb_get_descriptor+0xb1/0x3e0 drivers/usb/core/message.c:794
usb_get_configuration+0x2bc/0x52c0 drivers/usb/core/config.c:946
usb_enumerate_device drivers/usb/core/hub.c:2531 [inline]
usb_new_device+0x146/0x16f0 drivers/usb/core/hub.c:2669
register_root_hub+0x275/0x590 drivers/usb/core/hcd.c:994
usb_add_hcd+0xba1/0x1050 drivers/usb/core/hcd.c:2976
vhci_hcd_probe+0x1c1/0x380 drivers/usb/usbip/vhci_hcd.c:1377
platform_probe+0x145/0x1d0 drivers/base/platform.c:1404
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x26d/0x9a0 drivers/base/dd.c:657
page last free pid 10 tgid 10 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1392 [inline]
__free_frozen_pages+0xb80/0xd80 mm/page_alloc.c:2892
vfree+0x25a/0x400 mm/vmalloc.c:3434
delayed_vfree_work+0x55/0x80 mm/vmalloc.c:3353
process_one_work kernel/workqueue.c:3239 [inline]
process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3322
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3403
kthread+0x70e/0x8a0 kernel/kthread.c:463
ret_from_fork+0x3fc/0x770 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:
ffff88802888f080: 00 fc fc fc fa fc fc fc 06 fc fc fc 06 fc fc fc
ffff88802888f100: 06 fc fc fc fa fc fc fc 00 fc fc fc 06 fc fc fc
>ffff88802888f180: 06 fc fc fc 07 fc fc fc 06 fc fc fc 07 fc fc fc
^
ffff88802888f200: fa fc fc fc 00 fc fc fc fa fc fc fc 00 fc fc fc
ffff88802888f280: fa fc fc fc fa fc fc fc fa fc fc fc fa fc fc fc
==================================================================
---
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 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.
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] [usb?] KASAN: slab-out-of-bounds Read in mon_bin_event
2025-07-02 17:42 [syzbot] [usb?] KASAN: slab-out-of-bounds Read in mon_bin_event syzbot
@ 2025-07-03 4:34 ` Hillf Danton
2025-07-03 9:47 ` syzbot
0 siblings, 1 reply; 5+ messages in thread
From: Hillf Danton @ 2025-07-03 4:34 UTC (permalink / raw)
To: syzbot; +Cc: linux-kernel, syzkaller-bugs
> Date: Wed, 02 Jul 2025 10:42:25 -0700
> syzbot found the following issue on:
>
> HEAD commit: 1343433ed389 Add linux-next specific files for 20250630
> git tree: linux-next
> console+strace: https://syzkaller.appspot.com/x/log.txt?x=1370d770580000
> kernel config: https://syzkaller.appspot.com/x/.config?x=66357ac5b0466f16
> dashboard link: https://syzkaller.appspot.com/bug?extid=86b6d7c8bcc66747c505
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=129b2ebc580000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1770d770580000
#syz test
--- l/drivers/usb/mon/mon_bin.c
+++ y/drivers/usb/mon/mon_bin.c
@@ -603,6 +603,8 @@ static void mon_bin_event(struct mon_rea
}
if (length != 0) {
+ if (length > urb->transfer_buffer_length)
+ length = urb->transfer_buffer_length;
length = mon_bin_get_data(rp, offset, urb, length,
&ep->flag_data);
if (length > 0) {
--
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [syzbot] [usb?] KASAN: slab-out-of-bounds Read in mon_bin_event
2025-07-03 4:34 ` Hillf Danton
@ 2025-07-03 9:47 ` syzbot
2025-07-20 19:16 ` syztest Arnaud Lecomte
0 siblings, 1 reply; 5+ messages in thread
From: syzbot @ 2025-07-03 9:47 UTC (permalink / raw)
To: hdanton, linux-kernel, syzkaller-bugs
Hello,
syzbot has tested the proposed patch but the reproducer is still triggering an issue:
KASAN: slab-out-of-bounds Read in mon_bin_event
usb 1-1: config 0 interface 0 altsetting 0 has 1 endpoint descriptor, different from the interface descriptor's value: 9
usb 1-1: New USB device found, idVendor=045e, idProduct=07da, bcdDevice= 0.00
usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
usb 1-1: config 0 descriptor??
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 drivers/usb/mon/mon_bin.c:252 [inline]
BUG: KASAN: slab-out-of-bounds in mon_bin_get_data drivers/usb/mon/mon_bin.c:420 [inline]
BUG: KASAN: slab-out-of-bounds in mon_bin_event+0x12ec/0x23b0 drivers/usb/mon/mon_bin.c:608
Read of size 832 at addr ffff888021ad5e81 by task kworker/1:3/5846
CPU: 1 UID: 0 PID: 5846 Comm: kworker/1:3 Not tainted 6.16.0-rc4-next-20250702-syzkaller-06656-g50c8770a42fa-dirty #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_lvl+0x189/0x250 lib/dump_stack.c:120
print_address_description mm/kasan/report.c:408 [inline]
print_report+0xd2/0x2b0 mm/kasan/report.c:521
kasan_report+0x118/0x150 mm/kasan/report.c:634
check_region_inline mm/kasan/generic.c:-1 [inline]
kasan_check_range+0x2b0/0x2c0 mm/kasan/generic.c:189
__asan_memcpy+0x29/0x70 mm/kasan/shadow.c:105
mon_copy_to_buff drivers/usb/mon/mon_bin.c:252 [inline]
mon_bin_get_data drivers/usb/mon/mon_bin.c:420 [inline]
mon_bin_event+0x12ec/0x23b0 drivers/usb/mon/mon_bin.c:608
mon_bus_submit drivers/usb/mon/mon_main.c:89 [inline]
mon_submit+0x193/0x210 drivers/usb/mon/mon_main.c:100
usbmon_urb_submit include/linux/usb/hcd.h:724 [inline]
usb_hcd_submit_urb+0x11d/0x1aa0 drivers/usb/core/hcd.c:1518
usb_start_wait_urb+0x114/0x4c0 drivers/usb/core/message.c:59
usb_internal_control_msg drivers/usb/core/message.c:103 [inline]
usb_control_msg+0x232/0x3e0 drivers/usb/core/message.c:154
usbhid_raw_request+0x3cd/0x4e0 drivers/hid/usbhid/hid-core.c:-1
__hid_request+0x1c1/0x370 drivers/hid/hid-core.c:1989
hidinput_change_resolution_multipliers drivers/hid/hid-input.c:1950 [inline]
hidinput_connect+0x218a/0x3030 drivers/hid/hid-input.c:2327
hid_connect+0x499/0x19a0 drivers/hid/hid-core.c:2239
hid_hw_start+0xa8/0x120 drivers/hid/hid-core.c:2357
ms_probe+0x180/0x430 drivers/hid/hid-microsoft.c:391
__hid_device_probe drivers/hid/hid-core.c:2727 [inline]
hid_device_probe+0x39d/0x710 drivers/hid/hid-core.c:2764
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x26a/0x9a0 drivers/base/dd.c:657
__driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:799
driver_probe_device+0x4f/0x430 drivers/base/dd.c:829
__device_attach_driver+0x2ce/0x530 drivers/base/dd.c:957
bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:462
__device_attach+0x2b8/0x400 drivers/base/dd.c:1029
bus_probe_device+0x185/0x260 drivers/base/bus.c:537
device_add+0x7b6/0xb50 drivers/base/core.c:3691
hid_add_device+0x398/0x540 drivers/hid/hid-core.c:2910
usbhid_probe+0xe13/0x12a0 drivers/hid/usbhid/hid-core.c:1435
usb_probe_interface+0x637/0xbf0 drivers/usb/core/driver.c:396
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x26a/0x9a0 drivers/base/dd.c:657
__driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:799
driver_probe_device+0x4f/0x430 drivers/base/dd.c:829
__device_attach_driver+0x2ce/0x530 drivers/base/dd.c:957
bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:462
__device_attach+0x2b8/0x400 drivers/base/dd.c:1029
bus_probe_device+0x185/0x260 drivers/base/bus.c:537
device_add+0x7b6/0xb50 drivers/base/core.c:3691
usb_set_configuration+0x1a87/0x20e0 drivers/usb/core/message.c:2210
usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250
usb_probe_device+0x1c1/0x390 drivers/usb/core/driver.c:291
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x26a/0x9a0 drivers/base/dd.c:657
__driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:799
driver_probe_device+0x4f/0x430 drivers/base/dd.c:829
__device_attach_driver+0x2ce/0x530 drivers/base/dd.c:957
bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:462
__device_attach+0x2b8/0x400 drivers/base/dd.c:1029
bus_probe_device+0x185/0x260 drivers/base/bus.c:537
device_add+0x7b6/0xb50 drivers/base/core.c:3691
usb_new_device+0xa39/0x16f0 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+0x2941/0x4a00 drivers/usb/core/hub.c:5948
process_one_work kernel/workqueue.c:3239 [inline]
process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3322
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3403
kthread+0x70e/0x8a0 kernel/kthread.c:463
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
</TASK>
Allocated by task 5846:
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
__kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:394
kasan_kmalloc include/linux/kasan.h:260 [inline]
__do_kmalloc_node mm/slub.c:4365 [inline]
__kmalloc_noprof+0x27a/0x4f0 mm/slub.c:4377
kmalloc_noprof include/linux/slab.h:909 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
hid_alloc_report_buf drivers/hid/hid-core.c:1890 [inline]
__hid_request+0x94/0x370 drivers/hid/hid-core.c:1980
hidinput_change_resolution_multipliers drivers/hid/hid-input.c:1950 [inline]
hidinput_connect+0x218a/0x3030 drivers/hid/hid-input.c:2327
hid_connect+0x499/0x19a0 drivers/hid/hid-core.c:2239
hid_hw_start+0xa8/0x120 drivers/hid/hid-core.c:2357
ms_probe+0x180/0x430 drivers/hid/hid-microsoft.c:391
__hid_device_probe drivers/hid/hid-core.c:2727 [inline]
hid_device_probe+0x39d/0x710 drivers/hid/hid-core.c:2764
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x26a/0x9a0 drivers/base/dd.c:657
__driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:799
driver_probe_device+0x4f/0x430 drivers/base/dd.c:829
__device_attach_driver+0x2ce/0x530 drivers/base/dd.c:957
bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:462
__device_attach+0x2b8/0x400 drivers/base/dd.c:1029
bus_probe_device+0x185/0x260 drivers/base/bus.c:537
device_add+0x7b6/0xb50 drivers/base/core.c:3691
hid_add_device+0x398/0x540 drivers/hid/hid-core.c:2910
usbhid_probe+0xe13/0x12a0 drivers/hid/usbhid/hid-core.c:1435
usb_probe_interface+0x637/0xbf0 drivers/usb/core/driver.c:396
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x26a/0x9a0 drivers/base/dd.c:657
__driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:799
driver_probe_device+0x4f/0x430 drivers/base/dd.c:829
__device_attach_driver+0x2ce/0x530 drivers/base/dd.c:957
bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:462
__device_attach+0x2b8/0x400 drivers/base/dd.c:1029
bus_probe_device+0x185/0x260 drivers/base/bus.c:537
device_add+0x7b6/0xb50 drivers/base/core.c:3691
usb_set_configuration+0x1a87/0x20e0 drivers/usb/core/message.c:2210
usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250
usb_probe_device+0x1c1/0x390 drivers/usb/core/driver.c:291
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x26a/0x9a0 drivers/base/dd.c:657
__driver_probe_device+0x18c/0x2f0 drivers/base/dd.c:799
driver_probe_device+0x4f/0x430 drivers/base/dd.c:829
__device_attach_driver+0x2ce/0x530 drivers/base/dd.c:957
bus_for_each_drv+0x251/0x2e0 drivers/base/bus.c:462
__device_attach+0x2b8/0x400 drivers/base/dd.c:1029
bus_probe_device+0x185/0x260 drivers/base/bus.c:537
device_add+0x7b6/0xb50 drivers/base/core.c:3691
usb_new_device+0xa39/0x16f0 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+0x2941/0x4a00 drivers/usb/core/hub.c:5948
process_one_work kernel/workqueue.c:3239 [inline]
process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3322
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3403
kthread+0x70e/0x8a0 kernel/kthread.c:463
ret_from_fork+0x3fc/0x770 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 ffff888021ad5e80
which belongs to the cache kmalloc-8 of size 8
The buggy address is located 1 bytes inside of
allocated 7-byte region [ffff888021ad5e80, ffff888021ad5e87)
The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x21ad5
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801a841500 dead000000000100 dead000000000122
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 3280583634, free_ts 3148007746
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1848
prep_new_page mm/page_alloc.c:1856 [inline]
get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3855
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5145
alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2419
alloc_slab_page mm/slub.c:2487 [inline]
allocate_slab+0x8a/0x370 mm/slub.c:2655
new_slab mm/slub.c:2709 [inline]
___slab_alloc+0xbeb/0x1410 mm/slub.c:3891
__slab_alloc mm/slub.c:3981 [inline]
__slab_alloc_node mm/slub.c:4056 [inline]
slab_alloc_node mm/slub.c:4217 [inline]
__do_kmalloc_node mm/slub.c:4364 [inline]
__kmalloc_noprof+0x305/0x4f0 mm/slub.c:4377
kmalloc_noprof include/linux/slab.h:909 [inline]
kzalloc_noprof include/linux/slab.h:1039 [inline]
acpi_ns_internalize_name+0x2c2/0x3a0 drivers/acpi/acpica/nsutils.c:331
acpi_ns_get_node_unlocked drivers/acpi/acpica/nsutils.c:666 [inline]
acpi_ns_get_node+0x1a3/0x350 drivers/acpi/acpica/nsutils.c:726
acpi_get_handle+0x181/0x2a0 drivers/acpi/acpica/nsxfname.c:98
acpi_has_method+0x86/0xd0 drivers/acpi/utils.c:672
acpi_show_attr drivers/acpi/device_sysfs.c:548 [inline]
acpi_attr_is_visible+0x19d/0x4f0 drivers/acpi/device_sysfs.c:588
create_files fs/sysfs/group.c:65 [inline]
internal_create_group+0x5d7/0x1110 fs/sysfs/group.c:183
internal_create_groups fs/sysfs/group.c:223 [inline]
sysfs_create_groups+0x59/0x120 fs/sysfs/group.c:249
device_add_groups drivers/base/core.c:2838 [inline]
device_add_attrs+0x1c4/0x5a0 drivers/base/core.c:2913
device_add+0x496/0xb50 drivers/base/core.c:3645
page last free pid 43 tgid 43 stack trace:
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1392 [inline]
__free_frozen_pages+0xb80/0xd80 mm/page_alloc.c:2892
discard_slab mm/slub.c:2753 [inline]
__put_partials+0x156/0x1a0 mm/slub.c:3218
put_partials mm/slub.c:3237 [inline]
flush_cpu_slab+0x2b7/0x450 mm/slub.c:3372
process_one_work kernel/workqueue.c:3239 [inline]
process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3322
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3403
kthread+0x70e/0x8a0 kernel/kthread.c:463
ret_from_fork+0x3fc/0x770 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:
ffff888021ad5d80: fa fc fc fc fa fc fc fc fa fc fc fc fa fc fc fc
ffff888021ad5e00: 00 fc fc fc 02 fc fc fc 00 fc fc fc fa fc fc fc
>ffff888021ad5e80: 07 fc fc fc 00 fc fc fc 00 fc fc fc 05 fc fc fc
^
ffff888021ad5f00: fa fc fc fc 05 fc fc fc fa fc fc fc 05 fc fc fc
ffff888021ad5f80: 00 fc fc fc fa fc fc fc 00 fc fc fc 00 fc fc fc
==================================================================
Tested on:
commit: 50c8770a Add linux-next specific files for 20250702
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=17507770580000
kernel config: https://syzkaller.appspot.com/x/.config?x=76d012e863976d4c
dashboard link: https://syzkaller.appspot.com/bug?extid=86b6d7c8bcc66747c505
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
patch: https://syzkaller.appspot.com/x/patch.diff?x=15210c8c580000
^ permalink raw reply [flat|nested] 5+ messages in thread
* syztest
2025-07-03 9:47 ` syzbot
@ 2025-07-20 19:16 ` Arnaud Lecomte
2025-07-20 19:46 ` [syzbot] [usb?] KASAN: slab-out-of-bounds Read in mon_bin_event syzbot
0 siblings, 1 reply; 5+ messages in thread
From: Arnaud Lecomte @ 2025-07-20 19:16 UTC (permalink / raw)
To: syzbot+86b6d7c8bcc66747c505; +Cc: linux-kernel, syzkaller-bugs
#syz test
--- a/drivers/usb/mon/mon_bin.c
+++ b/drivers/usb/mon/mon_bin.c
@@ -249,7 +249,11 @@ static unsigned int mon_copy_to_buff(const struct mon_reader_bin *this,
* Copy data and advance pointers.
*/
buf = this->b_vec[off / CHUNK_SIZE].ptr + off % CHUNK_SIZE;
- memcpy(buf, from, step_len);
+
+ if (copy_from_kernel_nofault(buf, from, step_len)) {
+ pr_warn("Failed to copy URB transfer buffer content into mon bin.");
+ return -EFAULT;
+ }
if ((off += step_len) >= this->b_size) off = 0;
from += step_len;
length -= step_len;
@@ -413,11 +417,13 @@ static unsigned int mon_bin_get_data(const struct mon_reader_bin *rp,
*flag = 0;
if (urb->num_sgs == 0) {
- if (urb->transfer_buffer == NULL) {
+ if (
+ urb->transfer_buffer == NULL ||
+ mon_copy_to_buff(rp, offset, urb->transfer_buffer, length) < 0
+ ) {
*flag = 'Z';
return length;
}
- mon_copy_to_buff(rp, offset, urb->transfer_buffer, length);
length = 0;
} else {
@@ -434,6 +440,10 @@ static unsigned int mon_bin_get_data(const struct mon_reader_bin *rp,
this_len = min_t(unsigned int, sg->length, length);
offset = mon_copy_to_buff(rp, offset, sg_virt(sg),
this_len);
+ if (offset < 0) {
+ *flag = 'Z';
+ return length;
+ }
length -= this_len;
}
if (i == 0)
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [syzbot] [usb?] KASAN: slab-out-of-bounds Read in mon_bin_event
2025-07-20 19:16 ` syztest Arnaud Lecomte
@ 2025-07-20 19:46 ` syzbot
0 siblings, 0 replies; 5+ messages in thread
From: syzbot @ 2025-07-20 19:46 UTC (permalink / raw)
To: contact, linux-kernel, syzkaller-bugs
Hello,
syzbot has tested the proposed patch and the reproducer did not trigger any issue:
Reported-by: syzbot+86b6d7c8bcc66747c505@syzkaller.appspotmail.com
Tested-by: syzbot+86b6d7c8bcc66747c505@syzkaller.appspotmail.com
Tested on:
commit: d086c886 Add linux-next specific files for 20250718
git tree: linux-next
console output: https://syzkaller.appspot.com/x/log.txt?x=118af7d4580000
kernel config: https://syzkaller.appspot.com/x/.config?x=8a6aa2cafcc62853
dashboard link: https://syzkaller.appspot.com/bug?extid=86b6d7c8bcc66747c505
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
patch: https://syzkaller.appspot.com/x/patch.diff?x=15fa638c580000
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:[~2025-07-20 19:46 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2025-07-02 17:42 [syzbot] [usb?] KASAN: slab-out-of-bounds Read in mon_bin_event syzbot
2025-07-03 4:34 ` Hillf Danton
2025-07-03 9:47 ` syzbot
2025-07-20 19:16 ` syztest Arnaud Lecomte
2025-07-20 19:46 ` [syzbot] [usb?] KASAN: slab-out-of-bounds Read in mon_bin_event syzbot
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