syzbot


KMSAN: uninit-value in batadv_hard_if_event

Status: auto-closed as invalid on 2020/02/26 06:35
Reported-by: syzbot+0183453ce4de8bdf9214@syzkaller.appspotmail.com
First crash: 1149d, last: 1136d
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KMSAN: uninit-value in batadv_hard_if_event (2) C 162 768d 851d 17/24 fixed on 2020/11/16 12:12

Sample crash report:
usb 3-1: config 0 has no interface number 0
usb 3-1: New USB device found, idVendor=0411, idProduct=0012, bcdDevice=56.5f
usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
usb 3-1: 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: 13599 Comm: kworker/0:1 Not tainted 5.4.0-rc5+ #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+0x128/0x220 mm/kmsan/kmsan_report.c:108
 __msan_warning+0x73/0xe0 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:2202
 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:2202
 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:151 [inline]
 kmsan_internal_chain_origin+0xbd/0x180 mm/kmsan/kmsan.c:319
 kmsan_memcpy_memmove_metadata+0x25c/0x2e0 mm/kmsan/kmsan.c:254
 kmsan_memcpy_metadata+0xb/0x10 mm/kmsan/kmsan.c:274
 __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:2202
 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:2202
 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
=====================================================

Crashes (11):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kmsan-gce 2019/10/29 06:34 https://github.com/google/kmsan.git master 96c6c3194b1b 5ea87a66 .config log report
ci-upstream-kmsan-gce 2019/10/29 05:37 https://github.com/google/kmsan.git master 96c6c3194b1b 5ea87a66 .config log report
ci-upstream-kmsan-gce 2019/10/28 17:42 https://github.com/google/kmsan.git master 96c6c3194b1b 439d7b14 .config log report
ci-upstream-kmsan-gce 2019/10/28 13:24 https://github.com/google/kmsan.git master d86c15562d02 25bb509e .config log report
ci-upstream-kmsan-gce 2019/10/28 09:39 https://github.com/google/kmsan.git master d86c15562d02 25bb509e .config log report
ci-upstream-kmsan-gce 2019/10/27 23:44 https://github.com/google/kmsan.git master d86c15562d02 25bb509e .config log report
ci-upstream-kmsan-gce 2019/10/27 23:19 https://github.com/google/kmsan.git master d86c15562d02 25bb509e .config log report
ci-upstream-kmsan-gce 2019/10/24 10:25 https://github.com/google/kmsan.git master d86c15562d02 d01bb02a .config log report
ci-upstream-kmsan-gce 2019/10/20 07:03 https://github.com/google/kmsan.git master 3c8ca70889aa 8c88c9c1 .config log report
ci-upstream-kmsan-gce 2019/10/19 02:25 https://github.com/google/kmsan.git master 3c8ca70889aa 8c88c9c1 .config log report
ci-upstream-kmsan-gce 2019/10/16 19:51 https://github.com/google/kmsan.git master c24534505750 8c88c9c1 .config log report
* Struck through repros no longer work on HEAD.