BUG: unable to handle kernel NULL pointer dereference in check_preemption

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	BUG: unable to handle kernel NULL pointer dereference in check_preemption_disabled (2) usb				1	1403d	1403d	0/26	closed as invalid on 2020/06/16 10:33
upstream	BUG: unable to handle kernel NULL pointer dereference in check_preemption_disabled (3) ext4				3	1402d	1402d	15/26	fixed on 2020/07/17 17:58

BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 9981a067 P4D 9981a067 PUD 90355067 PMD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 13371 Comm: syz-executor.5 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:ffffc900016c6e78 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000002 RSI: ffffffff87dfade8 RDI: 0000000000000005 RBP: ffffffff88935e40 R08: ffff88808edf8100 R09: 0000000000000001 R10: ffffffff8c588a87 R11: fffffbfff18b1150 R12: ffffffff88935e00 R13: 0000000000000001 R14: 0000000000037e00 R15: ffff8880a19ec000 FS: 00007f6bae12e700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 00000000909ce000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: check_preemption_disabled+0x38/0x220 lib/smp_processor_id.c:54 __schedule+0x7b/0x1f80 kernel/sched/core.c:4081 preempt_schedule_common+0x4a/0xc0 kernel/sched/core.c:4311 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:40 __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] _raw_spin_unlock_irq+0x67/0x80 kernel/locking/spinlock.c:199 spin_unlock_irq include/linux/spinlock.h:403 [inline] rh_call_control drivers/usb/core/hcd.c:739 [inline] rh_urb_enqueue drivers/usb/core/hcd.c:842 [inline] usb_hcd_submit_urb+0x8dc/0x1f50 drivers/usb/core/hcd.c:1543 usb_submit_urb+0x6e5/0x13b0 drivers/usb/core/urb.c:570 usb_start_wait_urb+0x101/0x2b0 drivers/usb/core/message.c:58 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: 0033:0x416861 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:00007f6bae12d7a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 0000000000416861 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00007f6bae12d850 RBP: 000000000078bf00 R08: 000000000000000f R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 00000000ffffffff R13: 0000000000000c1d R14: 00000000004ce6e7 R15: 00007f6bae12e6d4 Modules linked in: CR2: 0000000000000000 ---[ end trace de6b84242a8293b2 ]--- 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:ffffc900016c6e78 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000002 RSI: ffffffff87dfade8 RDI: 0000000000000005 RBP: ffffffff88935e40 R08: ffff88808edf8100 R09: 0000000000000001 R10: ffffffff8c588a87 R11: fffffbfff18b1150 R12: ffffffff88935e00 R13: 0000000000000001 R14: 0000000000037e00 R15: ffff8880a19ec000 FS: 00007f6bae12e700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 00000000909ce000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400