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Kernel: Fix EINVAL when mmaping with address and no MAP_FIXED

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The current behavior accidently trys to allocate 0 bytes when a non-null
address is provided and MAP_FIXED is specified. This is clearly a bug.
This commit is contained in:
Peter Elliott 2022-05-16 23:17:47 -06:00 • committed by Andreas Kling
commit f6943c85b0
Notes: sideshowbarker 2024-07-17 10:42:32 +09:00
1 changed files with 1 additions and 1 deletions
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2
Kernel/Syscalls/mmap.cpp
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@ -198,7 +198,7 @@ ErrorOr<FlatPtr> Process::sys$mmap(Userspace<Syscall::SC_mmap_params const*> use
Memory::VirtualRange requested_range { VirtualAddress { addr }, rounded_size };
if (addr && !(map_fixed || map_fixed_noreplace)) {
// If there's an address but MAP_FIXED wasn't specified, the address is just a hint.
requested_range = { {}, 0 };
requested_range = { {}, rounded_size };
}
if (map_anonymous) {