Hello,
syzbot found the following crash on:
HEAD commit: 014077b5 DO-NOT-SUBMIT: usb-fuzzer: main usb gadget fuzzer..
git tree: https://github.com/google/kmsan.git master
console output: https://syzkaller.appspot.com/x/log.txt?x=123e42a5600000
kernel config: https://syzkaller.appspot.com/x/.config?x=f03c659d0830ab8d
dashboard link: https://syzkaller.appspot.com/bug?extid=7c2bb71996f95a82524c
compiler: clang version 9.0.0 (/home/glider/llvm/clang
80fee25776c2fb61e74c1ecb1a523375c2500b69)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11b0411a600000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12d1ee01600000
IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+7c2bb71996f95a82524c@xxxxxxxxxxxxxxxxxxxxxxxxx
microsoft 0003:045E:07DA.0002: unknown main item tag 0x0
microsoft 0003:045E:07DA.0002: unknown main item tag 0x0
==================================================================
BUG: KMSAN: kernel-usb-infoleak in usb_submit_urb+0x7ef/0x1f50
drivers/usb/core/urb.c:405
CPU: 1 PID: 17 Comm: kworker/1:0 Not tainted 5.3.0-rc7+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS
Google 01/01/2011
Workqueue: usb_hub_wq hub_event
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x191/0x1f0 lib/dump_stack.c:113
kmsan_report+0x162/0x2d0 mm/kmsan/kmsan_report.c:109
kmsan_internal_check_memory+0x7be/0x8d0 mm/kmsan/kmsan.c:553
kmsan_handle_urb+0x28/0x40 mm/kmsan/kmsan_hooks.c:621
usb_submit_urb+0x7ef/0x1f50 drivers/usb/core/urb.c:405
hid_submit_ctrl+0xb5f/0x1160 drivers/hid/usbhid/hid-core.c:416
usbhid_restart_ctrl_queue+0x355/0x510 drivers/hid/usbhid/hid-core.c:258
__usbhid_submit_report drivers/hid/usbhid/hid-core.c:601 [inline]
usbhid_submit_report+0x924/0x1200 drivers/hid/usbhid/hid-core.c:638
usbhid_request+0xc6/0xe0 drivers/hid/usbhid/hid-core.c:1253
hid_hw_request include/linux/hid.h:1053 [inline]
__hidinput_change_resolution_multipliers+0x132/0x6a0
drivers/hid/hid-input.c:1566
hidinput_change_resolution_multipliers drivers/hid/hid-input.c:1604
[inline]
hidinput_connect+0x2b9a/0x4220 drivers/hid/hid-input.c:1914
hid_connect+0x582/0x15c0 drivers/hid/hid-core.c:1877
hid_hw_start+0x141/0x230 drivers/hid/hid-core.c:1981
ms_probe+0x39b/0x8f0 drivers/hid/hid-microsoft.c:388
hid_device_probe+0x490/0x820 drivers/hid/hid-core.c:2209
really_probe+0xd08/0x1dc0 drivers/base/dd.c:548
driver_probe_device+0x1ba/0x510 drivers/base/dd.c:709
__device_attach_driver+0x5b8/0x790 drivers/base/dd.c:816
bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454
__device_attach+0x489/0x750 drivers/base/dd.c:882
device_initial_probe+0x4a/0x60 drivers/base/dd.c:929
bus_probe_device+0x131/0x390 drivers/base/bus.c:514
device_add+0x25b5/0x2df0 drivers/base/core.c:2165
hid_add_device+0x132b/0x1470 drivers/hid/hid-core.c:2365
usbhid_probe+0x152b/0x1880 drivers/hid/usbhid/hid-core.c:1386
usb_probe_interface+0xd19/0x1310 drivers/usb/core/driver.c:361
really_probe+0x1373/0x1dc0 drivers/base/dd.c:552
driver_probe_device+0x1ba/0x510 drivers/base/dd.c:709
__device_attach_driver+0x5b8/0x790 drivers/base/dd.c:816
bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454
__device_attach+0x489/0x750 drivers/base/dd.c:882
device_initial_probe+0x4a/0x60 drivers/base/dd.c:929
bus_probe_device+0x131/0x390 drivers/base/bus.c:514
device_add+0x25b5/0x2df0 drivers/base/core.c:2165
usb_set_configuration+0x309f/0x3710 drivers/usb/core/message.c:2027
generic_probe+0xe7/0x280 drivers/usb/core/generic.c:210
usb_probe_device+0x146/0x200 drivers/usb/core/driver.c:266
really_probe+0x1373/0x1dc0 drivers/base/dd.c:552
driver_probe_device+0x1ba/0x510 drivers/base/dd.c:709
__device_attach_driver+0x5b8/0x790 drivers/base/dd.c:816
bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454
__device_attach+0x489/0x750 drivers/base/dd.c:882
device_initial_probe+0x4a/0x60 drivers/base/dd.c:929
bus_probe_device+0x131/0x390 drivers/base/bus.c:514
device_add+0x25b5/0x2df0 drivers/base/core.c:2165
usb_new_device+0x23e5/0x2fb0 drivers/usb/core/hub.c:2536
hub_port_connect drivers/usb/core/hub.c:5098 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5213 [inline]
port_event drivers/usb/core/hub.c:5359 [inline]
hub_event+0x581d/0x72f0 drivers/usb/core/hub.c:5441
process_one_work+0x1572/0x1ef0 kernel/workqueue.c:2269
process_scheduled_works kernel/workqueue.c:2331 [inline]
worker_thread+0x189c/0x2460 kernel/workqueue.c:2417
kthread+0x4b5/0x4f0 kernel/kthread.c:256
ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355
Uninit was created at:
kmsan_save_stack_with_flags mm/kmsan/kmsan.c:189 [inline]
kmsan_internal_poison_shadow+0x58/0xb0 mm/kmsan/kmsan.c:148
kmsan_slab_alloc+0xaa/0x120 mm/kmsan/kmsan_hooks.c:175
slab_alloc_node mm/slub.c:2790 [inline]
slab_alloc mm/slub.c:2799 [inline]
__kmalloc+0x28e/0x430 mm/slub.c:3830
kmalloc include/linux/slab.h:557 [inline]
hcd_buffer_alloc+0x391/0x510 drivers/usb/core/buffer.c:132
usb_alloc_coherent+0x11a/0x190 drivers/usb/core/usb.c:910
hid_alloc_buffers drivers/hid/usbhid/hid-core.c:851 [inline]
usbhid_start+0xf60/0x3970 drivers/hid/usbhid/hid-core.c:1075
hid_hw_start+0x9a/0x230 drivers/hid/hid-core.c:1976
ms_probe+0x39b/0x8f0 drivers/hid/hid-microsoft.c:388
hid_device_probe+0x490/0x820 drivers/hid/hid-core.c:2209
really_probe+0xd08/0x1dc0 drivers/base/dd.c:548
driver_probe_device+0x1ba/0x510 drivers/base/dd.c:709
__device_attach_driver+0x5b8/0x790 drivers/base/dd.c:816
bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454
__device_attach+0x489/0x750 drivers/base/dd.c:882
device_initial_probe+0x4a/0x60 drivers/base/dd.c:929
bus_probe_device+0x131/0x390 drivers/base/bus.c:514
device_add+0x25b5/0x2df0 drivers/base/core.c:2165
hid_add_device+0x132b/0x1470 drivers/hid/hid-core.c:2365
usbhid_probe+0x152b/0x1880 drivers/hid/usbhid/hid-core.c:1386
usb_probe_interface+0xd19/0x1310 drivers/usb/core/driver.c:361
really_probe+0x1373/0x1dc0 drivers/base/dd.c:552
driver_probe_device+0x1ba/0x510 drivers/base/dd.c:709
__device_attach_driver+0x5b8/0x790 drivers/base/dd.c:816
bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454
__device_attach+0x489/0x750 drivers/base/dd.c:882
device_initial_probe+0x4a/0x60 drivers/base/dd.c:929
bus_probe_device+0x131/0x390 drivers/base/bus.c:514
device_add+0x25b5/0x2df0 drivers/base/core.c:2165
usb_set_configuration+0x309f/0x3710 drivers/usb/core/message.c:2027
generic_probe+0xe7/0x280 drivers/usb/core/generic.c:210
usb_probe_device+0x146/0x200 drivers/usb/core/driver.c:266
really_probe+0x1373/0x1dc0 drivers/base/dd.c:552
driver_probe_device+0x1ba/0x510 drivers/base/dd.c:709
__device_attach_driver+0x5b8/0x790 drivers/base/dd.c:816
bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454
__device_attach+0x489/0x750 drivers/base/dd.c:882
device_initial_probe+0x4a/0x60 drivers/base/dd.c:929
bus_probe_device+0x131/0x390 drivers/base/bus.c:514
device_add+0x25b5/0x2df0 drivers/base/core.c:2165
usb_new_device+0x23e5/0x2fb0 drivers/usb/core/hub.c:2536
hub_port_connect drivers/usb/core/hub.c:5098 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5213 [inline]
port_event drivers/usb/core/hub.c:5359 [inline]
hub_event+0x581d/0x72f0 drivers/usb/core/hub.c:5441
process_one_work+0x1572/0x1ef0 kernel/workqueue.c:2269
process_scheduled_works kernel/workqueue.c:2331 [inline]
worker_thread+0x189c/0x2460 kernel/workqueue.c:2417
kthread+0x4b5/0x4f0 kernel/kthread.c:256
ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355
Bytes 0-4095 of 4096 are uninitialized
Memory access of size 4096 starts at ffff888108f43000
==================================================================
---
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