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@syzkaller.appspotmail.com
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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