Messages in this thread | | | Date | Tue, 30 Jul 2019 02:38:07 -0700 | Subject | KMSAN: kernel-usb-infoleak in pcan_usb_pro_init | From | syzbot <> |
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Hello,
syzbot found the following crash on:
HEAD commit: beaab8a3 fix KASAN build git tree: kmsan console output: https://syzkaller.appspot.com/x/log.txt?x=12ddda44600000 kernel config: https://syzkaller.appspot.com/x/.config?x=4db781fe35a84ef5 dashboard link: https://syzkaller.appspot.com/bug?extid=d6a5a1a3657b596ef132 compiler: clang version 9.0.0 (/home/glider/llvm/clang 80fee25776c2fb61e74c1ecb1a523375c2500b69) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16e3625c600000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=115e7264600000
IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+d6a5a1a3657b596ef132@syzkaller.appspotmail.com
usb 1-1: config 0 has no interface number 0 usb 1-1: New USB device found, idVendor=0c72, idProduct=000d, bcdDevice=da.d3 usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 usb 1-1: config 0 descriptor?? ================================================================== BUG: KMSAN: kernel-usb-infoleak in usb_submit_urb+0x7ef/0x1f50 /drivers/usb/core/urb.c:405 CPU: 1 PID: 3814 Comm: kworker/1:2 Not tainted 5.2.0+ #15 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 kmsan_internal_check_memory+0x974/0xa80 /mm/kmsan/kmsan.c:551 kmsan_handle_urb+0x28/0x40 /mm/kmsan/kmsan_hooks.c:621 usb_submit_urb+0x7ef/0x1f50 /drivers/usb/core/urb.c:405 usb_start_wait_urb+0x143/0x410 /drivers/usb/core/message.c:58 usb_internal_control_msg /drivers/usb/core/message.c:102 [inline] usb_control_msg+0x49f/0x7f0 /drivers/usb/core/message.c:156 pcan_usb_pro_send_req /drivers/net/can/usb/peak_usb/pcan_usb_pro.c:336 [inline] pcan_usb_pro_drv_loaded /drivers/net/can/usb/peak_usb/pcan_usb_pro.c:504 [inline] pcan_usb_pro_init+0x1319/0x1720 /drivers/net/can/usb/peak_usb/pcan_usb_pro.c:894 peak_usb_create_dev /drivers/net/can/usb/peak_usb/pcan_usb_core.c:809 [inline] peak_usb_probe+0x1416/0x1b20 /drivers/net/can/usb/peak_usb/pcan_usb_core.c:907 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 generic_probe+0xe7/0x280 /drivers/usb/core/generic.c:210 usb_probe_device+0x146/0x200 /drivers/usb/core/driver.c:266 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_new_device+0x23e5/0x2fb0 /drivers/usb/core/hub.c:2534 hub_port_connect /drivers/usb/core/hub.c:5089 [inline] hub_port_connect_change /drivers/usb/core/hub.c:5204 [inline] port_event /drivers/usb/core/hub.c:5350 [inline] hub_event+0x5853/0x7320 /drivers/usb/core/hub.c:5432 process_one_work+0x1572/0x1f00 /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 created at: kmsan_save_stack_with_flags /mm/kmsan/kmsan.c:187 [inline] kmsan_internal_poison_shadow+0x53/0xa0 /mm/kmsan/kmsan.c:146 kmsan_slab_alloc+0xaa/0x120 /mm/kmsan/kmsan_hooks.c:175 slab_alloc_node /mm/slub.c:2771 [inline] slab_alloc /mm/slub.c:2780 [inline] kmem_cache_alloc_trace+0x873/0xa50 /mm/slub.c:2797 kmalloc /./include/linux/slab.h:547 [inline] pcan_usb_pro_drv_loaded /drivers/net/can/usb/peak_usb/pcan_usb_pro.c:497 [inline] pcan_usb_pro_init+0xe96/0x1720 /drivers/net/can/usb/peak_usb/pcan_usb_pro.c:894 peak_usb_create_dev /drivers/net/can/usb/peak_usb/pcan_usb_core.c:809 [inline] peak_usb_probe+0x1416/0x1b20 /drivers/net/can/usb/peak_usb/pcan_usb_core.c:907 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 generic_probe+0xe7/0x280 /drivers/usb/core/generic.c:210 usb_probe_device+0x146/0x200 /drivers/usb/core/driver.c:266 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_new_device+0x23e5/0x2fb0 /drivers/usb/core/hub.c:2534 hub_port_connect /drivers/usb/core/hub.c:5089 [inline] hub_port_connect_change /drivers/usb/core/hub.c:5204 [inline] port_event /drivers/usb/core/hub.c:5350 [inline] hub_event+0x5853/0x7320 /drivers/usb/core/hub.c:5432 process_one_work+0x1572/0x1f00 /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
Bytes 2-15 of 16 are uninitialized Memory access of size 16 starts at ffff8881030286e0 ==================================================================
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