Messages in this thread | | | Date | Mon, 14 Oct 2019 22:10:06 -0700 | Subject | KMSAN: uninit-value in ax88172a_bind | From | syzbot <> |
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Hello,
syzbot found the following crash on:
HEAD commit: fa169025 kmsan: get rid of unused static functions in kmsa.. git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=1432a653600000 kernel config: https://syzkaller.appspot.com/x/.config?x=49548798e87d32d7 dashboard link: https://syzkaller.appspot.com/bug?extid=a8d4acdad35e6bbca308 compiler: clang version 9.0.0 (/home/glider/llvm/clang 80fee25776c2fb61e74c1ecb1a523375c2500b69) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14743a6f600000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=125bdbc7600000
IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+a8d4acdad35e6bbca308@syzkaller.appspotmail.com
usb 1-1: config 0 has no interface number 0 usb 1-1: New USB device found, idVendor=0b95, idProduct=172a, bcdDevice=9b.e9 usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 1-1: config 0 descriptor?? ===================================================== BUG: KMSAN: uninit-value in ax88172a_bind+0x76d/0xf80 drivers/net/usb/ax88172a.c:217 CPU: 1 PID: 3632 Comm: kworker/1:2 Not tainted 5.4.0-rc2+ #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+0x14e/0x2c0 mm/kmsan/kmsan_report.c:110 __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:245 ax88172a_bind+0x76d/0xf80 drivers/net/usb/ax88172a.c:217 usbnet_probe+0x10d3/0x39d0 drivers/net/usb/usbnet.c:1730 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: ----buf@ax88172a_bind Variable was created at: ax88172a_bind+0x66/0xf80 drivers/net/usb/ax88172a.c:186 ax88172a_bind+0x66/0xf80 drivers/net/usb/ax88172a.c:186 =====================================================
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