On Thu, Aug 22, 2019 at 3:07 PM Andrey Konovalov <andreyknvl@xxxxxxxxxx> wrote: > > On Wed, Aug 7, 2019 at 4:03 PM Andrey Konovalov <andreyknvl@xxxxxxxxxx> wrote: > > > > On Fri, Apr 12, 2019 at 1:32 PM Andrey Konovalov <andreyknvl@xxxxxxxxxx> wrote: > > > > > > On Fri, Apr 12, 2019 at 1:29 AM syzbot > > > <syzbot+40918e4d826fb2ff9b96@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > > > > > > > syzbot has found a reproducer for the following crash on: > > > > > > > > HEAD commit: 9a33b369 usb-fuzzer: main usb gadget fuzzer driver > > > > git tree: https://github.com/google/kasan/tree/usb-fuzzer > > > > console output: https://syzkaller.appspot.com/x/log.txt?x=10d552b7200000 > > > > kernel config: https://syzkaller.appspot.com/x/.config?x=23e37f59d94ddd15 > > > > dashboard link: https://syzkaller.appspot.com/bug?extid=40918e4d826fb2ff9b96 > > > > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > > > > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17a4c1af200000 > > > > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=121b274b200000 > > > > > > > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > > > > Reported-by: syzbot+40918e4d826fb2ff9b96@xxxxxxxxxxxxxxxxxxxxxxxxx > > > > > > > > usb 1-1: r8712u: MAC Address from efuse = 00:e0:4c:87:00:00 > > > > usb 1-1: r8712u: Loading firmware from "rtlwifi/rtl8712u.bin" > > > > usb 1-1: USB disconnect, device number 2 > > > > usb 1-1: Direct firmware load for rtlwifi/rtl8712u.bin failed with error -2 > > > > usb 1-1: r8712u: Firmware request failed > > > > WARNING: CPU: 0 PID: 575 at net/core/dev.c:8152 > > > > rollback_registered_many+0x1f3/0xe70 net/core/dev.c:8152 > > > > Kernel panic - not syncing: panic_on_warn set ... > > > > CPU: 0 PID: 575 Comm: kworker/0:4 Not tainted 5.1.0-rc4-319354-g9a33b36 #3 > > > > 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+0xe8/0x16e lib/dump_stack.c:113 > > > > panic+0x29d/0x5f2 kernel/panic.c:214 > > > > __warn.cold+0x20/0x48 kernel/panic.c:571 > > > > report_bug+0x262/0x2a0 lib/bug.c:186 > > > > fixup_bug arch/x86/kernel/traps.c:179 [inline] > > > > fixup_bug arch/x86/kernel/traps.c:174 [inline] > > > > do_error_trap+0x130/0x1f0 arch/x86/kernel/traps.c:272 > > > > do_invalid_op+0x37/0x40 arch/x86/kernel/traps.c:291 > > > > invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973 > > > > RIP: 0010:rollback_registered_many+0x1f3/0xe70 net/core/dev.c:8152 > > > > Code: 05 00 00 31 ff 44 89 fe e8 5a 15 f3 f4 45 84 ff 0f 85 49 ff ff ff e8 > > > > 1c 14 f3 f4 0f 1f 44 00 00 e8 12 14 f3 f4 e8 0d 14 f3 f4 <0f> 0b 4c 89 e7 > > > > e8 33 72 f2 f6 31 ff 41 89 c4 89 c6 e8 27 15 f3 f4 > > > > RSP: 0018:ffff88809d087698 EFLAGS: 00010293 > > > > RAX: ffff88809d058000 RBX: ffff888096240000 RCX: ffffffff8c7eb146 > > > > RDX: 0000000000000000 RSI: ffffffff8c7eb163 RDI: 0000000000000001 > > > > RBP: ffff88809d0877c8 R08: ffff88809d058000 R09: fffffbfff2708111 > > > > R10: fffffbfff2708110 R11: ffffffff93840887 R12: ffff888096240070 > > > > R13: dffffc0000000000 R14: ffff88809d087758 R15: 0000000000000000 > > > > rollback_registered+0xf7/0x1c0 net/core/dev.c:8228 > > > > unregister_netdevice_queue net/core/dev.c:9275 [inline] > > > > unregister_netdevice_queue+0x1dc/0x2b0 net/core/dev.c:9268 > > > > unregister_netdevice include/linux/netdevice.h:2655 [inline] > > > > unregister_netdev+0x1d/0x30 net/core/dev.c:9316 > > > > r871xu_dev_remove+0xe7/0x223 drivers/staging/rtl8712/usb_intf.c:604 > > > > usb_unbind_interface+0x1c9/0x980 drivers/usb/core/driver.c:423 > > > > __device_release_driver drivers/base/dd.c:1082 [inline] > > > > device_release_driver_internal+0x436/0x4f0 drivers/base/dd.c:1113 > > > > bus_remove_device+0x302/0x5c0 drivers/base/bus.c:556 > > > > device_del+0x467/0xb90 drivers/base/core.c:2269 > > > > usb_disable_device+0x242/0x790 drivers/usb/core/message.c:1235 > > > > usb_disconnect+0x298/0x870 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+0xcd2/0x3b00 drivers/usb/core/hub.c:5432 > > > > process_one_work+0x90f/0x1580 kernel/workqueue.c:2269 > > > > process_scheduled_works kernel/workqueue.c:2331 [inline] > > > > worker_thread+0x7b0/0xe20 kernel/workqueue.c:2417 > > > > kthread+0x313/0x420 kernel/kthread.c:253 > > > > ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 > > > > Kernel Offset: disabled > > > > Rebooting in 86400 seconds.. > > > > > > > > > > +linux-usb mailing list > > > > This USB bug is the most frequently triggered one right now with over > > 27k kernel crashes. > > OK, this report is confusing. It was initially reported on the > upstream instance a long time ago, but since then has stopped > happening, as it was probably fixed. Then when we launched the USB > fuzzing instance, it has started producing similarly named reports > (with a different root cause though), and they were bucketed into this > bug by syzkaller. I've improved parsing titles of such reports in > syzkaller, so I'm invalidating this one, and syzbot should send a > properly attributed USB report soon. > > #syz invalid This has been reported as: WARNING in r871xu_dev_remove https://syzkaller.appspot.com/bug?extid=80899a8a8efe8968cde7
