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Kernel: Reading past the end of an Ext2FSInode should return 0

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Fixes #5763.
This commit is contained in:
Andreas Kling
2021-04-04 17:21:07 +02:00
parent 23cc88f83b
commit 5001b71c42
Notes: sideshowbarker 2024-07-18 20:49:23 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/5001b71c423
1 changed files with 3 additions and 0 deletions
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3
Kernel/FileSystem/Ext2FileSystem.cpp
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@@ -857,6 +857,9 @@ ssize_t Ext2FSInode::read_bytes(off_t offset, ssize_t count, UserOrKernelBuffer&
if (m_raw_inode.i_size == 0)
return 0;
if (static_cast<u64>(offset) >= size())
return 0;
// Symbolic links shorter than 60 characters are store inline inside the i_block array.
// This avoids wasting an entire block on short links. (Most links are short.)
if (is_symlink() && size() < max_inline_symlink_length) {