From mboxrd@z Thu Jan 1 00:00:00 1970 From: syzbot Subject: WARNING in usbtouch_reset_resume Date: Mon, 05 Aug 2019 04:58:06 -0700 Message-ID: <000000000000c8bea1058f5d6bf6@google.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Return-path: Sender: linux-kernel-owner@vger.kernel.org To: allison@lohutok.net, andreyknvl@google.com, dmitry.torokhov@gmail.com, gregkh@linuxfoundation.org, kstewart@linuxfoundation.org, linux-input@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, mpe@ellerman.id.au, rfontana@redhat.com, rydberg@bitmath.org, syzkaller-bugs@googlegroups.com, tglx@linutronix.de List-Id: linux-input@vger.kernel.org Hello, syzbot found the following crash on: HEAD commit: e96407b4 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=1104baf8600000 kernel config: https://syzkaller.appspot.com/x/.config?x=cfa2c18fb6a8068e dashboard link: https://syzkaller.appspot.com/bug?extid=91f7bbcce580376d784e compiler: gcc (GCC) 9.0.0 20181231 (experimental) syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14199a62600000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17d94aaa600000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+91f7bbcce580376d784e@syzkaller.appspotmail.com input: USB Touchscreen 0eef:0002 as /devices/platform/dummy_hcd.0/usb1/1-1/1-1:0.180/input/input5 usb 1-1: reset high-speed USB device number 2 using dummy_hcd usb 1-1: Using ep0 maxpacket: 32 ------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(lock->magic != lock) WARNING: CPU: 0 PID: 12 at kernel/locking/mutex.c:912 __mutex_lock_common kernel/locking/mutex.c:912 [inline] WARNING: CPU: 0 PID: 12 at kernel/locking/mutex.c:912 __mutex_lock+0xd31/0x1360 kernel/locking/mutex.c:1077 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.3.0-rc2+ #25 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+0xca/0x13e lib/dump_stack.c:113 panic+0x2a3/0x6da kernel/panic.c:219 __warn.cold+0x20/0x4a kernel/panic.c:576 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+0x12b/0x1e0 arch/x86/kernel/traps.c:272 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:291 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1026 RIP: 0010:__mutex_lock_common kernel/locking/mutex.c:912 [inline] RIP: 0010:__mutex_lock+0xd31/0x1360 kernel/locking/mutex.c:1077 Code: d2 0f 85 f6 05 00 00 44 8b 05 7b de 1c 02 45 85 c0 0f 85 0a f4 ff ff 48 c7 c6 c0 92 c6 85 48 c7 c7 60 90 c6 85 e8 f4 c4 a6 fb <0f> 0b e9 f0 f3 ff ff 65 48 8b 1c 25 00 ef 01 00 be 08 00 00 00 48 RSP: 0018:ffff8881da20f6b0 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8128a0fd RDI: ffffed103b441ec8 RBP: ffff8881da20f820 R08: ffff8881da1f9800 R09: fffffbfff0d9ee35 R10: fffffbfff0d9ee34 R11: ffffffff86cf71a3 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff8881d2e291c8 R15: ffff8881d2fba228 usbtouch_reset_resume+0xb1/0x170 drivers/input/touchscreen/usbtouchscreen.c:1611 usb_resume_interface drivers/usb/core/driver.c:1242 [inline] usb_resume_interface.isra.0+0x184/0x390 drivers/usb/core/driver.c:1210 usb_resume_both+0x26a/0x7b0 drivers/usb/core/driver.c:1412 __rpm_callback+0x27e/0x3c0 drivers/base/power/runtime.c:355 rpm_callback+0x18f/0x230 drivers/base/power/runtime.c:485 rpm_resume+0x10f7/0x1870 drivers/base/power/runtime.c:849 __pm_runtime_resume+0x103/0x180 drivers/base/power/runtime.c:1076 pm_runtime_get_sync include/linux/pm_runtime.h:226 [inline] usb_autoresume_device+0x1e/0x60 drivers/usb/core/driver.c:1599 usb_remote_wakeup+0x7b/0xb0 drivers/usb/core/hub.c:3603 hub_port_connect_change drivers/usb/core/hub.c:5199 [inline] port_event drivers/usb/core/hub.c:5359 [inline] hub_event+0x246c/0x3640 drivers/usb/core/hub.c:5441 process_one_work+0x92b/0x1530 kernel/workqueue.c:2269 worker_thread+0x96/0xe20 kernel/workqueue.c:2415 kthread+0x318/0x420 kernel/kthread.c:255 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352 Kernel Offset: disabled Rebooting in 86400 seconds.. --- 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@googlegroups.com. 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