Commit 5080ba8b authored Jan 06, 2025 by Chen Shu Committed by Mahesh Mahadevan Feb 04, 2025

fs: ext2: Fix nbytes_to_read calculation in ext2_inode_read()

Fix incorrect nbytes_to_read calculation in ext2_inode_read() function.
Previously nbytes_to_read was decremented by read value which caused
incorrect calculation of bytes to read in subsequent iterations.
Now nbytes_to_read is decremented by to_read value which represents
the actual number of bytes read in current iteration.

This fixes potential data corruption issues when reading files from
ext2 filesystem.

Signed-off-by: Chen Shu <751541594@qq.com>
(cherry picked from commit 5a5f05ba)

parent 13e7d650

subsys/fs/ext2/ext2_impl.c

+1 −1

Changes for subsys/fs/ext2/ext2_impl.c: 1 added line, 1 removed line.
Original line number	Diff line number	Diff line
		@@ -630,7 +630,7 @@ ssize_t ext2_inode_read(struct ext2_inode inode, void buf, uint32_t offset, si
		memcpy((uint8_t *)buf + read, inode_current_block_mem(inode) + block_off, to_read);

		read += to_read;
		nbytes_to_read -= read;
		nbytes_to_read -= to_read;
		offset += to_read;
		}

Admin message