KMSAN: uninit-value in batadv_hard_if_event

From: syzbot
Date: Fri Oct 18 2019 - 10:12:11 EST

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Hello,

syzbot found the following crash on:

HEAD commit: c2453450 kmsan: kcov: prettify the code unpoisoning area->..
git tree: https://github.com/google/kmsan.git master
console output: https://syzkaller.appspot.com/x/log.txt?x=10b0c06b600000
kernel config: https://syzkaller.appspot.com/x/.config?x=3684f3c73f43899a
dashboard link: https://syzkaller.appspot.com/bug?extid=0183453ce4de8bdf9214
compiler: clang version 9.0.0 (/home/glider/llvm/clang 80fee25776c2fb61e74c1ecb1a523375c2500b69)

Unfortunately, I don't have any reproducer for this crash yet.

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+0183453ce4de8bdf9214@xxxxxxxxxxxxxxxxxxxxxxxxx

usb 1-1: config 0 has no interface number 0
usb 1-1: New USB device found, idVendor=0411, idProduct=0012, bcdDevice=56.5f
usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
usb 1-1: config 0 descriptor??
=====================================================
BUG: KMSAN: uninit-value in batadv_check_known_mac_addr net/batman-adv/hard-interface.c:511 [inline]
BUG: KMSAN: uninit-value in batadv_hardif_add_interface net/batman-adv/hard-interface.c:942 [inline]
BUG: KMSAN: uninit-value in batadv_hard_if_event+0x23c0/0x3260 net/batman-adv/hard-interface.c:1032
CPU: 0 PID: 13223 Comm: kworker/0:3 Not tainted 5.4.0-rc3+ #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+0x14a/0x2f0 mm/kmsan/kmsan_report.c:109
__msan_warning+0x73/0xf0 mm/kmsan/kmsan_instr.c:245
batadv_check_known_mac_addr net/batman-adv/hard-interface.c:511 [inline]
batadv_hardif_add_interface net/batman-adv/hard-interface.c:942 [inline]
batadv_hard_if_event+0x23c0/0x3260 net/batman-adv/hard-interface.c:1032
notifier_call_chain kernel/notifier.c:95 [inline]
__raw_notifier_call_chain kernel/notifier.c:396 [inline]
raw_notifier_call_chain+0x13d/0x240 kernel/notifier.c:403
call_netdevice_notifiers_info net/core/dev.c:1749 [inline]
call_netdevice_notifiers_extack net/core/dev.c:1761 [inline]
call_netdevice_notifiers net/core/dev.c:1775 [inline]
register_netdevice+0x2126/0x26a0 net/core/dev.c:8810
register_netdev+0x93/0xd0 net/core/dev.c:8901
rtl8150_probe+0x11ef/0x14a0 drivers/net/usb/rtl8150.c:916
usb_probe_interface+0xd19/0x1310 drivers/usb/core/driver.c:361
really_probe+0xd91/0x1f90 drivers/base/dd.c:552
driver_probe_device+0x1ba/0x510 drivers/base/dd.c:721
__device_attach_driver+0x5b8/0x790 drivers/base/dd.c:828
bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:430
__device_attach+0x489/0x750 drivers/base/dd.c:894
device_initial_probe+0x4a/0x60 drivers/base/dd.c:941
bus_probe_device+0x131/0x390 drivers/base/bus.c:490
device_add+0x25b5/0x2df0 drivers/base/core.c:2201
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+0xd91/0x1f90 drivers/base/dd.c:552
driver_probe_device+0x1ba/0x510 drivers/base/dd.c:721
__device_attach_driver+0x5b8/0x790 drivers/base/dd.c:828
bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:430
__device_attach+0x489/0x750 drivers/base/dd.c:894
device_initial_probe+0x4a/0x60 drivers/base/dd.c:941
bus_probe_device+0x131/0x390 drivers/base/bus.c:490
device_add+0x25b5/0x2df0 drivers/base/core.c:2201
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
worker_thread+0x111b/0x2460 kernel/workqueue.c:2415
kthread+0x4b5/0x4f0 kernel/kthread.c:256
ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355

Uninit was stored to memory at:
kmsan_save_stack_with_flags mm/kmsan/kmsan.c:150 [inline]
kmsan_internal_chain_origin+0xbd/0x170 mm/kmsan/kmsan.c:317
kmsan_memcpy_memmove_metadata+0x25c/0x2e0 mm/kmsan/kmsan.c:253
kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:273
__msan_memcpy+0x56/0x70 mm/kmsan/kmsan_instr.c:129
set_ethernet_addr drivers/net/usb/rtl8150.c:282 [inline]
rtl8150_probe+0x1143/0x14a0 drivers/net/usb/rtl8150.c:912
usb_probe_interface+0xd19/0x1310 drivers/usb/core/driver.c:361
really_probe+0xd91/0x1f90 drivers/base/dd.c:552
driver_probe_device+0x1ba/0x510 drivers/base/dd.c:721
__device_attach_driver+0x5b8/0x790 drivers/base/dd.c:828
bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:430
__device_attach+0x489/0x750 drivers/base/dd.c:894
device_initial_probe+0x4a/0x60 drivers/base/dd.c:941
bus_probe_device+0x131/0x390 drivers/base/bus.c:490
device_add+0x25b5/0x2df0 drivers/base/core.c:2201
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+0xd91/0x1f90 drivers/base/dd.c:552
driver_probe_device+0x1ba/0x510 drivers/base/dd.c:721
__device_attach_driver+0x5b8/0x790 drivers/base/dd.c:828
bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:430
__device_attach+0x489/0x750 drivers/base/dd.c:894
device_initial_probe+0x4a/0x60 drivers/base/dd.c:941
bus_probe_device+0x131/0x390 drivers/base/bus.c:490
device_add+0x25b5/0x2df0 drivers/base/core.c:2201
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
worker_thread+0x111b/0x2460 kernel/workqueue.c:2415
kthread+0x4b5/0x4f0 kernel/kthread.c:256
ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355

Local variable description: ----node_id.i@rtl8150_probe
Variable was created at:
get_registers drivers/net/usb/rtl8150.c:911 [inline]
set_ethernet_addr drivers/net/usb/rtl8150.c:281 [inline]
rtl8150_probe+0xdc8/0x14a0 drivers/net/usb/rtl8150.c:912
get_registers drivers/net/usb/rtl8150.c:911 [inline]
set_ethernet_addr drivers/net/usb/rtl8150.c:281 [inline]
rtl8150_probe+0xdc8/0x14a0 drivers/net/usb/rtl8150.c:912
=====================================================

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Next message: syzbot: "WARNING in gtco_input_open/usb_submit_urb"
Previous message: Mel Gorman: "Re: [PATCH 2/3] mm, meminit: Recalculate pcpu batch and high limits after init completes"
Next in thread: Sven Eckelmann: "Re: KMSAN: uninit-value in batadv_hard_if_event"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]