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Kernel: Hold InodeVMObject reference while inspecting it in sys$mmap()

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This commit is contained in:
Andreas Kling 2020-12-29 13:32:08 +01:00
parent b8db585a83
commit af28a8ad11
1 changed files with 3 additions and 3 deletions
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6
Kernel/Syscalls/mmap.cpp
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@ -68,10 +68,10 @@ static bool validate_inode_mmap_prot(const Process& process, int prot, const Ino
if ((prot & PROT_WRITE) && !metadata.may_write(process))
return false;
InterruptDisabler disabler;
if (inode.shared_vmobject()) {
if ((prot & PROT_EXEC) && inode.shared_vmobject()->writable_mappings())
if (auto shared_vmobject = inode.shared_vmobject()) {
if ((prot & PROT_EXEC) && shared_vmobject->writable_mappings())
return false;
if ((prot & PROT_WRITE) && inode.shared_vmobject()->executable_mappings())
if ((prot & PROT_WRITE) && shared_vmobject->executable_mappings())
return false;
}
}