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Kernel: Handle mmap requests on zero-length data file inodes safely

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Liav A
2022-08-06 21:05:48 +03:00
committed by Idan Horowitz
parent c88cc8557f
commit 3ad0e1a1d5
5 changed files with 28 additions and 5 deletions
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6
Kernel/FileSystem/InodeFile.cpp
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@@ -80,11 +80,11 @@ ErrorOr<void> InodeFile::ioctl(OpenFileDescription& description, unsigned reques
}
}
ErrorOr<NonnullLockRefPtr<Memory::VMObject>> InodeFile::vmobject_for_mmap(Process&, Memory::VirtualRange const&, u64&, bool shared)
ErrorOr<NonnullLockRefPtr<Memory::VMObject>> InodeFile::vmobject_for_mmap(Process&, Memory::VirtualRange const& range, u64& offset, bool shared)
{
if (shared)
return TRY(Memory::SharedInodeVMObject::try_create_with_inode(inode()));
return TRY(Memory::PrivateInodeVMObject::try_create_with_inode(inode()));
return TRY(Memory::SharedInodeVMObject::try_create_with_inode_and_range(inode(), offset, range.size()));
return TRY(Memory::PrivateInodeVMObject::try_create_with_inode_and_range(inode(), offset, range.size()));
}
ErrorOr<NonnullOwnPtr<KString>> InodeFile::pseudo_path(OpenFileDescription const&) const