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Bug #403

Updated by Sven Eckelmann almost 4 years ago

From https://lists.open-mesh.org/mailman3/hyperkitty/list/b.a.t.m.a.n@lists.open-mesh.org/message/TEJ2F25CHODCK2PI7YQR3OWREY4S6ZBV/ https://lists.open-mesh.org/pipermail/b.a.t.m.a.n/2019-October/018997.html 

 <pre> 
 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 
 ===================================================== 


 --- 
 This bug 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 bug report. See: 
 https://goo.gl/tpsmEJ#status for how to communicate with syzbot. 
 </pre>

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