On Wed, May 15, 2019 at 2:37 PM syzbot <syzbot+d7f6a4fd149fcdaf780b@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello, > > syzbot found the following crash on: > > HEAD commit: 43151d6c usb-fuzzer: main usb gadget fuzzer driver > git tree: https://github.com/google/kasan.git usb-fuzzer > console output: https://syzkaller.appspot.com/x/log.txt?x=16a000a0a00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=95aff7278e7ff25e > dashboard link: https://syzkaller.appspot.com/bug?extid=d7f6a4fd149fcdaf780b > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17605e22a00000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1045a49ca00000 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+d7f6a4fd149fcdaf780b@xxxxxxxxxxxxxxxxxxxxxxxxx > > usb 1-1: string descriptor 0 read error: -71 > usb 1-1: claimed gadget: Vendor=0424 ProdID=c001 Bus=01 Device=02 > usb 1-1: device path: /sys/bus/usb/devices/1-1:0.133 > most_core: registered new device mdev0 (usb_device 1-1:0.133) > usb 1-1: USB disconnect, device number 2 > kasan: CONFIG_KASAN_INLINE enabled > kasan: GPF could be caused by NULL-ptr deref or user memory access > general protection fault: 0000 [#1] SMP KASAN PTI > CPU: 1 PID: 17 Comm: kworker/1:0 Not tainted 5.1.0-rc3+ #8 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > Workqueue: usb_hub_wq hub_event > RIP: 0010:device_del+0x76/0xb90 drivers/base/core.c:2224 > Code: f1 f1 f1 f1 c7 40 04 00 07 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 84 > 24 88 00 00 00 31 c0 e8 c1 ce d7 fe 48 89 d8 48 c1 e8 03 <80> 3c 28 00 0f > 85 82 0a 00 00 48 8b 03 4c 8d 63 60 31 f6 4c 8d 7b > RSP: 0018:ffff8881d9e4f7c0 EFLAGS: 00010246 > RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 > RDX: 0000000000000000 RSI: ffffffff8264999f RDI: 0000000000000000 > RBP: dffffc0000000000 R08: ffff8881d9e33000 R09: ffffed1039951b26 > R10: ffffed1039951b25 R11: ffff8881cca8d92f R12: ffff8881cde8f828 > R13: ffff8881cca8d860 R14: ffff8881cde8f730 R15: 0000000000000000 > FS: 0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007f77df136000 CR3: 00000001cf00a000 CR4: 00000000001406e0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > Call Trace: > device_unregister+0x11/0x30 drivers/base/core.c:2301 > hdm_disconnect+0xdf/0x200 drivers/staging/most/usb/usb.c:1208 > usb_unbind_interface+0x1c4/0x8b0 drivers/usb/core/driver.c:423 > __device_release_driver drivers/base/dd.c:1082 [inline] > device_release_driver_internal+0x431/0x4f0 drivers/base/dd.c:1113 > bus_remove_device+0x2ee/0x4c0 drivers/base/bus.c:556 > device_del+0x462/0xb90 drivers/base/core.c:2269 > usb_disable_device+0x211/0x690 drivers/usb/core/message.c:1237 > usb_disconnect+0x284/0x840 drivers/usb/core/hub.c:2197 > hub_port_connect drivers/usb/core/hub.c:4940 [inline] > hub_port_connect_change drivers/usb/core/hub.c:5204 [inline] > port_event drivers/usb/core/hub.c:5350 [inline] > hub_event+0x13f8/0x35a0 drivers/usb/core/hub.c:5432 > process_one_work+0x90a/0x1580 kernel/workqueue.c:2269 > process_scheduled_works kernel/workqueue.c:2331 [inline] > worker_thread+0x7ab/0xe20 kernel/workqueue.c:2417 > kthread+0x30e/0x420 kernel/kthread.c:253 > ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 > Modules linked in: > ---[ end trace d819a3b977ff54ad ]--- > RIP: 0010:device_del+0x76/0xb90 drivers/base/core.c:2224 > Code: f1 f1 f1 f1 c7 40 04 00 07 f3 f3 65 48 8b 04 25 28 00 00 00 48 89 84 > 24 88 00 00 00 31 c0 e8 c1 ce d7 fe 48 89 d8 48 c1 e8 03 <80> 3c 28 00 0f > 85 82 0a 00 00 48 8b 03 4c 8d 63 60 31 f6 4c 8d 7b > RSP: 0018:ffff8881d9e4f7c0 EFLAGS: 00010246 > RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 > RDX: 0000000000000000 RSI: ffffffff8264999f RDI: 0000000000000000 > RBP: dffffc0000000000 R08: ffff8881d9e33000 R09: ffffed1039951b26 > R10: ffffed1039951b25 R11: ffff8881cca8d92f R12: ffff8881cde8f828 > R13: ffff8881cca8d860 R14: ffff8881cde8f730 R15: 0000000000000000 > FS: 0000000000000000(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007f77df136000 CR3: 00000001cf00a000 CR4: 00000000001406e0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 > > > --- > 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@xxxxxxxxxxxxxxxx. > > syzbot will keep track of this bug report. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > syzbot can test patches for this bug, for details see: > https://goo.gl/tpsmEJ#testing-patches Hasn't happened for a while, probably got fixed. #syz invalid
