------------[ cut here ]------------
WARNING: CPU: 1 PID: 2732 at kernel/kcov.c:684 kcov_remote_start.cold+0xc/0x26 kernel/kcov.c:684
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 2732 Comm: syz-executor.1 Not tainted 5.3.0-rc7+ #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __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:1028
RIP: 0010:kcov_remote_start.cold+0xc/0x26 kernel/kcov.c:684
Code: b0 f8 ff ff 48 c7 c7 d8 dd a4 86 e8 54 93 ea ff 0f 0b 5b 4c 89 e7 5d 41 5c e9 9d e7 2f 04 48 c7 c7 d8 dd a4 86 e8 3a 93 ea ff <0f> 0b e9 93 fd ff ff 48 c7 c7 d8 dd a4 86 e8 27 93 ea ff 0f 0b e9
RSP: 0018:ffff8881db309ae8 EFLAGS: 00010082
RAX: 0000000000000024 RBX: ffff8881d5600880 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff81288ddd RDI: ffffed103b66134f
RBP: ffff8881d5600880 R08: 0000000000000024 R09: ffffed103b665d58
R10: ffffed103b665d57 R11: ffff8881db32eabf R12: ffff8881c9eaec08
R13: ffff8881d76c4238 R14: dffffc0000000000 R15: ffff8881cd419e00
 dummy_timer+0x125f/0x301a drivers/usb/gadget/udc/dummy_hcd.c:1965
 call_timer_fn+0x179/0x650 kernel/time/timer.c:1322
 expire_timers kernel/time/timer.c:1366 [inline]
 __run_timers kernel/time/timer.c:1685 [inline]
 __run_timers kernel/time/timer.c:1653 [inline]
 run_timer_softirq+0x5cc/0x14b0 kernel/time/timer.c:1698
 __do_softirq+0x221/0x912 kernel/softirq.c:292
 invoke_softirq kernel/softirq.c:373 [inline]
 irq_exit+0x178/0x1a0 kernel/softirq.c:413
 exiting_irq arch/x86/include/asm/apic.h:537 [inline]
 smp_apic_timer_interrupt+0x12f/0x500 arch/x86/kernel/apic/apic.c:1133
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:830
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:85 [inline]
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x40/0x50 kernel/locking/spinlock.c:191
Code: e8 95 a1 b7 fb 48 89 ef e8 3d 82 b8 fb f6 c7 02 75 11 53 9d e8 f1 34 d5 fb 65 ff 0d 82 1d 94 7a 5b 5d c3 e8 02 33 d5 fb 53 9d <eb> ed 0f 1f 40 00 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 fd 65 ff
RSP: 0018:ffff8881c8b87228 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000007 RBX: 0000000000000246 RCX: 0000000000000007
RDX: 0000000000000000 RSI: ffff8881c88bd0c0 RDI: ffff8881c88bd044
RBP: ffff8881d8719c18 R08: ffff8881c88bc800 R09: fffffbfff11ad79d
R10: fffffbfff11ad79c R11: ffffffff88d6bce7 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: ffffea0006c36580
 spin_unlock_irqrestore include/linux/spinlock.h:393 [inline]
 __test_set_page_writeback+0x63e/0xb50 mm/page-writeback.c:2797
 set_page_writeback include/linux/page-flags.h:542 [inline]
 ext4_bio_write_page+0x1a9/0x1077 fs/ext4/page-io.c:424
 mpage_submit_page+0x14b/0x250 fs/ext4/inode.c:2253
 mpage_map_and_submit_buffers+0x49f/0x7c0 fs/ext4/inode.c:2450
 mpage_map_and_submit_extent fs/ext4/inode.c:2584 [inline]
 ext4_writepages+0x1a67/0x2dd0 fs/ext4/inode.c:2897
 do_writepages+0xfa/0x2a0 mm/page-writeback.c:2342
 __filemap_fdatawrite_range+0x1b6/0x2a0 mm/filemap.c:415
 filemap_write_and_wait_range mm/filemap.c:672 [inline]
 filemap_write_and_wait_range+0x65/0x100 mm/filemap.c:666
 ext4_direct_IO_read fs/ext4/inode.c:3877 [inline]
 ext4_direct_IO+0x47e/0x1920 fs/ext4/inode.c:3913
 generic_file_read_iter+0x302/0x29c0 mm/filemap.c:2323
 ext4_file_read_iter+0x145/0x1b0 fs/ext4/file.c:77
 call_read_iter include/linux/fs.h:1864 [inline]
 new_sync_read+0x418/0x6d0 fs/read_write.c:414
 __vfs_read+0xc9/0x100 fs/read_write.c:427
 vfs_read+0x1ea/0x430 fs/read_write.c:461
 ksys_read+0x127/0x250 fs/read_write.c:587
 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459879
Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f8e7a962c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459879
RDX: 00000000ffffffad RSI: 0000000020003200 RDI: 0000000000000004
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f8e7a9636d4
R13: 00000000004c6ced R14: 00000000004dc058 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..