kernel warning at kern/src/event.c:374, from core 2: [kernel] Null ev_q - kernel code should check before sending! Stack Backtrace on Core 2: #01 [<0xffffffffc200a38c>] in backtrace at src/kdebug.c:229 #02 [<0xffffffffc2009bb4>] in _warn at src/init.c:322 #03 [<0xffffffffc2007732>] in send_event at src/event.c:374 #04 [<0xffffffffc2056a45>] in sys_send_event at src/syscall.c:1439 #05 [<0xffffffffc205a019>] in syscall at src/syscall.c:2465 #06 [<0xffffffffc205a1f8>] in run_local_syscall at src/syscall.c:2500 #07 [<0xffffffffc205a739>] in prep_syscalls at src/syscall.c:2520 #08 [<0xffffffffc20abee2>] in sysenter_callwrapper at arch/x86/trap.c:854 HW TRAP frame (partial) at 0xffffffffc89963a0 on core 3 rax 0x0000000080000001 rbx 0x0000100000006a70 rcx 0x0000300000001020 rdx 0x0000000000000000 rbp 0x0000300000006f40 rsi 0x0000000000000008 rdi 0x0000000020000180 r8 0x0000000000000000 r9 0x0000000000000000 r10 0x0000000000000000 r11 0x0000000000000200 r12 0x0000300000006f00 r13 0x0000000000000008 r14 0x0000000000000000 r15 0x0000000000000000 trap 0x0000000e Page Fault gsbs 0x0000000000000000 fsbs 0x0000000000000000 err 0x--------00000004 rip 0x0000000080000001 cs 0x------------0023 flag 0x0000000000010202 rsp 0x0000300000006ef8 ss 0x------------001b err 0x4 (for PFs: User 4, Wr 2, Rd 1), aux 0x0000000080000001 Addr 0x0000000080000001 has no VMR VM Regions for proc 86 NR: Range: Prot, Flags, File, Off 00: (0x0000000000400000 - 0x00000000004b5000): 0x00000005, 0x00000001, 0xffff800006c15a20, 0x0000000000000000 01: (0x00000000004b5000 - 0x00000000004b6000): 0x00000005, 0x00000002, 0xffff800006c15a20, 0x00000000000b5000 02: (0x00000000006b6000 - 0x00000000006b9000): 0x00000003, 0x00000002, 0xffff800006c15a20, 0x00000000000b6000 03: (0x00000000006b9000 - 0x00000000008e5000): 0x00000003, 0x00000002, 0x0000000000000000, 0x0000000000000000 04: (0x0000000020000000 - 0x0000000020ff2000): 0x00000007, 0x00000022, 0x0000000000000000, 0x0000000000000000 05: (0x0000000020ff2000 - 0x0000000020ff9000): 0x01000000, 0x00000022, 0x0000000000000000, 0x0000000000000000 06: (0x0000000020ff9000 - 0x0000000020ffa000): 0x02000000, 0x00000001, 0x0000000000000000, 0x00000ffffffff000 07: (0x0000000020ffa000 - 0x0000000020ffd000): 0x01000000, 0x00000022, 0x0000000000000000, 0x0000000000000000 08: (0x0000000020ffd000 - 0x0000000020ffe000): 0x03000004, 0x00000022, 0x0000000000000000, 0x0000000000000000 09: (0x0000000020ffe000 - 0x0000000021000000): 0x01000000, 0x00000022, 0x0000000000000000, 0x0000000000000000 10: (0x0000100000000000 - 0x0000100000024000): 0x00000007, 0x00000022, 0x0000000000000000, 0x0000000000000000 11: (0x0000300000000000 - 0x0000300000001000): 0x00000003, 0x00000002, 0xffff800006c15a20, 0x0000000000000000 12: (0x0000300000001000 - 0x0000300000005000): 0x00000003, 0x00000022, 0x0000000000000000, 0x0000000000000000 13: (0x0000300000005000 - 0x0000300000007000): 0x00000007, 0x00000022, 0x0000000000000000, 0x0000000000000000 14: (0x0000300000007000 - 0x0000300000019000): 0x00000003, 0x00000022, 0x0000000000000000, 0x0000000000000000 15: (0x0000300000019000 - 0x000030000005d000): 0x00000007, 0x00000022, 0x0000000000000000, 0x0000000000000000 16: (0x00007f7fff8ff000 - 0x00007f7fff9ff000): 0x00000003, 0x00000022, 0x0000000000000000, 0x0000000000000000 Backtrace of user context on Core 3: Offsets only matter for shared libraries #01 Addr 0x0000000080000001 has no VMR #02 Addr 0x000000000040cca6 is in syz-executor at offset 0x000000000000cca6 #03 Addr 0x000000000040cdf2 is in syz-executor at offset 0x000000000000cdf2 #04 Addr 0x0000000000408428 is in syz-executor at offset 0x0000000000008428 #05 Addr 0x0000000000403e89 is in syz-executor at offset 0x0000000000003e89 #06 Addr 0x00000000004147fc is in syz-executor at offset 0x00000000000147fc #07 Addr 0x0000000000414801 is in syz-executor at offset 0x0000000000014801