Messages in this thread | | | Date | Wed, 10 Jul 2019 07:00:06 -0700 | Subject | Re: KMSAN: uninit-value in friio_power_ctrl | From | syzbot <> |
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syzbot has found a reproducer for the following crash on:
HEAD commit: 4009f3cf kmsan: slub: fix a compilation warning by moving .. git tree: kmsan console output: https://syzkaller.appspot.com/x/log.txt?x=17f85018600000 kernel config: https://syzkaller.appspot.com/x/.config?x=40511ad0c5945201 dashboard link: https://syzkaller.appspot.com/bug?extid=9e6bf7282557bd1fc80d compiler: clang version 9.0.0 (/home/glider/llvm/clang 80fee25776c2fb61e74c1ecb1a523375c2500b69) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=114535c4600000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16236437a00000
IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+9e6bf7282557bd1fc80d@syzkaller.appspotmail.com
usb 1-1: New USB device found, idVendor=7a69, idProduct=0001, bcdDevice=19.36 usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 1-1: config 0 descriptor?? usb 1-1: dvb_usb_v2: found a '774 Friio White ISDB-T USB2.0' in warm state ================================================================== BUG: KMSAN: uninit-value in friio_reset drivers/media/usb/dvb-usb-v2/gl861.c:433 [inline] BUG: KMSAN: uninit-value in friio_power_ctrl+0xb3e/0x1a70 drivers/media/usb/dvb-usb-v2/gl861.c:482 CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.2.0-rc4+ #12 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+0x162/0x2d0 mm/kmsan/kmsan_report.c:109 __msan_warning+0x75/0xe0 mm/kmsan/kmsan_instr.c:294 friio_reset drivers/media/usb/dvb-usb-v2/gl861.c:433 [inline] friio_power_ctrl+0xb3e/0x1a70 drivers/media/usb/dvb-usb-v2/gl861.c:482 dvb_usbv2_device_power_ctrl drivers/media/usb/dvb-usb-v2/dvb_usb_core.c:540 [inline] dvb_usbv2_init drivers/media/usb/dvb-usb-v2/dvb_usb_core.c:853 [inline] dvb_usbv2_probe+0xd3d/0x5dd0 drivers/media/usb/dvb-usb-v2/dvb_usb_core.c:980 usb_probe_interface+0xd19/0x1310 drivers/usb/core/driver.c:361 really_probe+0x1344/0x1d90 drivers/base/dd.c:513 driver_probe_device+0x1ba/0x510 drivers/base/dd.c:670 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:777 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454 __device_attach+0x489/0x750 drivers/base/dd.c:843 device_initial_probe+0x4a/0x60 drivers/base/dd.c:890 bus_probe_device+0x131/0x390 drivers/base/bus.c:514 device_add+0x25b5/0x2df0 drivers/base/core.c:2111 usb_set_configuration+0x309f/0x3710 drivers/usb/core/message.c:2027 ? __ms
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