Not sure what caused it, I got it while testing #6076. I had terminated a browser instance from terminal (which didn't immediately close down for some reason) and opened another browser from the taskbar when it happened.
I don't think it's related to the changes in #6076 since it happened in a syscall from WindowServer to a LocalSocket.
I didn't label this as a bug in case it is related to those changes.
Trace:
�[34;1m[#0 WindowServer(12:12)]�[0m: Unrecoverable page fault, read from address V0xc4193a48
�[34;1m[WindowServer(12:12)]�[0m: CRASH: CPU #0 Page Fault in ring 0
�[34;1m[#0 WindowServer(12:12)]�[0m: Exception code: 0000 (isr: 0000)
�[34;1m[#0 WindowServer(12:12)]�[0m: pc=0008:c014b28a eflags=00010046
�[34;1m[#0 WindowServer(12:12)]�[0m: stack=0010:c3dcaa94
�[34;1m[#0 WindowServer(12:12)]�[0m: ds=0010 es=0010 fs=0030 gs=002b
�[34;1m[#0 WindowServer(12:12)]�[0m: eax=c4194cec ebx=c011a4b4 ecx=00000000 edx=c0a413b8
�[34;1m[#0 WindowServer(12:12)]�[0m: ebp=c3dcaafc esp=c3dcaa94 esi=c0b9d49c edi=c4193a48
�[34;1m[#0 WindowServer(12:12)]�[0m: cr0=80010013 cr2=c4193a48 cr3=01a73000 cr4=00340ee4
�[34;1m[WindowServer(12:12)]�[0m: KERNEL PANIC! :^(
�[34;1m[WindowServer(12:12)]�[0m: Crash in ring 0
�[34;1m[WindowServer(12:12)]�[0m: at ../../Kernel/Arch/i386/CPU.cpp:190 in void Kernel::handle_crash(Kernel::RegisterState&, const char*, int, bool)
�[34;1m[#0 WindowServer(12:12)]�[0m: 0xc035c95b Kernel::__panic(char const*, unsigned int, char const*) +0xcf
�[34;1m[#0 WindowServer(12:12)]�[0m: 0xc055240c Kernel::handle_crash(Kernel::RegisterState&, char const*, int, bool) +0x255
�[34;1m[#0 WindowServer(12:12)]�[0m: 0xc055337d page_fault_handler +0xc20
�[34;1m[#0 WindowServer(12:12)]�[0m: 0xc0549858 page_fault_asm_entry +0x26
�[34;1m[#0 WindowServer(12:12)]�[0m: 0xc01b8f2f Kernel::DoubleBuffer::write(Kernel::UserOrKernelBuffer const&, unsigned long) +0x4cf
�[34;1m[#0 WindowServer(12:12)]�[0m: 0xc02ed61a Kernel::LocalSocket::sendto(Kernel::FileDescription&, Kernel::UserOrKernelBuffer const&, unsigned long, int, AK::Userspace<sockaddr const*>, unsigned int) +0x258
�[34;1m[#0 WindowServer(12:12)]�[0m: 0xc0332270 Kernel::Socket::write(Kernel::FileDescription&, unsigned long long, Kernel::UserOrKernelBuffer const&, unsigned long) +0x20c
�[34;1m[#0 WindowServer(12:12)]�[0m: 0xc021ecb5 Kernel::FileDescription::write(Kernel::UserOrKernelBuffer const&, unsigned long) +0x3ab
�[34;1m[#0 WindowServer(12:12)]�[0m: 0xc047bd58 Kernel::Process::do_write(Kernel::FileDescription&, Kernel::UserOrKernelBuffer const&, unsigned long) +0x8f8
�[34;1m[#0 WindowServer(12:12)]�[0m: 0xc047ce56 Kernel::Process::sys$write(int, AK::Userspace<unsigned char const*>, long) +0x7bc
�[34;1m[#0 WindowServer(12:12)]�[0m: 0xc0398c83 syscall_handler +0x1fde
�[34;1m[#0 WindowServer(12:12)]�[0m: 0xc0396c6d syscall_asm_entry +0x31
The PC c014b28a seems to point to these lines:
serenity/Kernel/FileSystem/File.h
Lines 58 to 59 in 23b659e
Which is nowhere near what the stack trace says.
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