------------[ cut here ]------------
WARNING: CPU: 0 PID: 2767 at kernel/kcov.c:684 kcov_remote_start.cold+0xc/0x26 kernel/kcov.c:684
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 2767 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:ffff8881db209ae8 EFLAGS: 00010082
RAX: 0000000000000024 RBX: ffff8881d5635d80 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff81288ddd RDI: ffffed103b64134f
RBP: ffff8881d5635d80 R08: 0000000000000024 R09: fffffbfff0d9ee75
R10: fffffbfff0d9ee74 R11: ffffffff86cf73a3 R12: ffff8881c935db48
R13: ffff8881da16c238 R14: dffffc0000000000 R15: ffff8881cd7ea900
 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:atomic_fetch_add_unless include/linux/atomic-fallback.h:1089 [inline]
RIP: 0010:atomic_add_unless include/linux/atomic-fallback.h:1111 [inline]
RIP: 0010:page_ref_add_unless include/linux/page_ref.h:157 [inline]
RIP: 0010:__page_cache_add_speculative include/linux/pagemap.h:186 [inline]
RIP: 0010:page_cache_get_speculative include/linux/pagemap.h:202 [inline]
RIP: 0010:find_get_entry+0x204/0x8b0 mm/filemap.c:1535
Code: 48 c1 e8 03 42 0f b6 14 30 48 89 e8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 42 06 00 00 41 8b 5d 34 31 ff 89 de 89 5c 24 48 <e8> 47 f8 ef ff 85 db 0f 84 cf 01 00 00 48 8d 44 24 48 48 89 04 24
RSP: 0018:ffff8881c8bdf960 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000007 RBX: 0000000000000002 RCX: ffffffff814de397
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000000000000000
RBP: ffffea0006c184f4 R08: ffff8881d1ecc800 R09: fffff94000d8309f
R10: fffff94000d8309e R11: ffffea0006c184f7 R12: ffffea0006c184c0
R13: ffffea0006c184c0 R14: dffffc0000000000 R15: 0000000000000003
 pagecache_get_page+0x44/0x9f0 mm/filemap.c:1632
 find_get_page include/linux/pagemap.h:260 [inline]
 generic_file_buffered_read mm/filemap.c:2067 [inline]
 generic_file_read_iter+0x659/0x29c0 mm/filemap.c:2344
 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:00007fa89217ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459879
RDX: 00000000ffffffad RSI: 0000000020003200 RDI: 0000000000000005
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa89217f6d4
R13: 00000000004c6ced R14: 00000000004dc058 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..