BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 981f0067 P4D 981f0067 PUD a81c2067 PMD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 9847 Comm: syz-executor.3 Not tainted 5.7.0-rc7-next-20200529-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__sanitizer_cov_trace_pc+0x43/0x60 kernel/kcov.c:202 Code: 24 74 0f 80 e6 01 74 35 8b 90 0c 14 00 00 85 d2 74 2b 8b 90 e8 13 00 00 83 fa 02 75 20 48 8b 88 f0 13 00 00 8b 80 ec 13 00 00 <48> 8b 11 48 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 c3 66 0f RSP: 0018:ffffc900019b6fd8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 00000000ffffe5bd RCX: 0000000000000000 RDX: 0000000000000002 RSI: ffffffff87e22534 RDI: ffffffff8c9086a0 RBP: 1ffff92000336dff R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8c588a87 R11: fffffbfff18b1150 R12: ffffc900019b7038 R13: ffffc900019b7218 R14: ffffffff89a09000 R15: ffffc900019b7150 FS: 00007f986e443700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000008e662000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __mod_timer kernel/time/timer.c:1008 [inline] schedule_timeout+0x124/0x850 kernel/time/timer.c:1896 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion_timeout+0x162/0x280 kernel/sched/completion.c:157 usb_start_wait_urb+0x144/0x2b0 drivers/usb/core/message.c:63 usb_internal_control_msg drivers/usb/core/message.c:102 [inline] usb_control_msg+0x31c/0x4a0 drivers/usb/core/message.c:153 get_port_status drivers/usb/core/hub.c:573 [inline] hub_ext_port_status+0x125/0x460 drivers/usb/core/hub.c:590 hub_port_status drivers/usb/core/hub.c:612 [inline] hub_activate+0x4f4/0x16c0 drivers/usb/core/hub.c:1119 hub_resume+0x97/0x3b0 drivers/usb/core/hub.c:3790 usb_resume_interface drivers/usb/core/driver.c:1298 [inline] usb_resume_interface.isra.0+0x2db/0x390 drivers/usb/core/driver.c:1256 usb_resume_both+0x26a/0x860 drivers/usb/core/driver.c:1458 __rpm_callback+0x27e/0x3c0 drivers/base/power/runtime.c:357 rpm_callback+0x18f/0x230 drivers/base/power/runtime.c:487 rpm_resume+0x1162/0x1930 drivers/base/power/runtime.c:849 __pm_runtime_resume+0x103/0x170 drivers/base/power/runtime.c:1080 pm_runtime_get_sync include/linux/pm_runtime.h:236 [inline] usb_autoresume_device+0x1e/0x60 drivers/usb/core/driver.c:1645 usbdev_open+0x1f3/0x930 drivers/usb/core/devio.c:1033 chrdev_open+0x219/0x5c0 fs/char_dev.c:414 do_dentry_open+0x4b6/0x11a0 fs/open.c:822 do_open fs/namei.c:3234 [inline] path_openat+0x1e9e/0x27d0 fs/namei.c:3351 do_filp_open+0x192/0x260 fs/namei.c:3378 do_sys_openat2+0x585/0x7a0 fs/open.c:1173 do_sys_open+0xc3/0x140 fs/open.c:1189 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:359 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x416911 Code: 75 14 b8 02 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 19 00 00 c3 48 83 ec 08 e8 0a fa ff ff 48 89 04 24 b8 02 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fa ff ff 48 89 d0 48 83 c4 08 48 3d 01 RSP: 002b:00007f986e4427a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000416911 RDX: 0000000000000000 RSI: 0000000000028081 RDI: 00007f986e442850 RBP: 000000000078bfa0 R08: 000000000000000f R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 00000000ffffffff R13: 0000000000000c5b R14: 00000000004ceb63 R15: 00007f986e4436d4 Modules linked in: CR2: 0000000000000000 ---[ end trace a8858c38325f25e9 ]--- RIP: 0010:__sanitizer_cov_trace_pc+0x43/0x60 kernel/kcov.c:202 Code: 24 74 0f 80 e6 01 74 35 8b 90 0c 14 00 00 85 d2 74 2b 8b 90 e8 13 00 00 83 fa 02 75 20 48 8b 88 f0 13 00 00 8b 80 ec 13 00 00 <48> 8b 11 48 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 c3 66 0f RSP: 0018:ffffc900019b6fd8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 00000000ffffe5bd RCX: 0000000000000000 RDX: 0000000000000002 RSI: ffffffff87e22534 RDI: ffffffff8c9086a0 RBP: 1ffff92000336dff R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff8c588a87 R11: fffffbfff18b1150 R12: ffffc900019b7038 R13: ffffc900019b7218 R14: ffffffff89a09000 R15: ffffc900019b7150 FS: 00007f986e443700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffe8a49f387 CR3: 000000008e662000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400