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Kernel: Make SharedInodeVMObject allocation OOM-safe

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This commit is contained in:
Andreas Kling 2021-07-11 17:52:07 +02:00
parent 59049ae4b7
commit af8c74a328
4 changed files with 17 additions and 6 deletions
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13
Kernel/Syscalls/execve.cpp
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@ -162,7 +162,11 @@ struct RequiredLoadRange {
static KResultOr<RequiredLoadRange> get_required_load_range(FileDescription& program_description)
{
auto& inode = *(program_description.inode());
auto vmobject = SharedInodeVMObject::create_with_inode(inode);
auto vmobject = SharedInodeVMObject::try_create_with_inode(inode);
if (!vmobject) {
dbgln("get_required_load_range: Unable to allocate SharedInodeVMObject");
return ENOMEM;
}
size_t executable_size = inode.size();
@ -263,7 +267,12 @@ static KResultOr<LoadResult> load_elf_object(NonnullOwnPtr<Space> new_space, Fil
FlatPtr load_offset, ShouldAllocateTls should_allocate_tls, ShouldAllowSyscalls should_allow_syscalls)
{
auto& inode = *(object_description.inode());
auto vmobject = SharedInodeVMObject::create_with_inode(inode);
auto vmobject = SharedInodeVMObject::try_create_with_inode(inode);
if (!vmobject) {
dbgln("load_elf_object: Unable to allocate SharedInodeVMObject");
return ENOMEM;
}
if (vmobject->writable_mappings()) {
dbgln("Refusing to execute a write-mapped program");
return ETXTBSY;