Description

In the Linux kernel, the following vulnerability has been resolved: md/raid5: validate payload size before accessing journal metadata r5c_recovery_analyze_meta_block() and r5l_recovery_verify_data_checksum_for_mb() iterate over payloads in a journal metadata block using on-disk payload size fields without validating them against the remaining space in the metadata block. A corrupted journal contains payload sizes extending beyond the PAGE_SIZE boundary can cause out-of-bounds reads when accessing payload fields or computing offsets. Add bounds validation for each payload type to ensure the full payload fits within meta_size before processing.

References 8

• git.kernel.org https://git.kernel.org/stable/c/28d3ff7109c66e99dc1b7cddacb5c760849620ef
• git.kernel.org https://git.kernel.org/stable/c/33698bd1b2db9764a29df7751533d33967ff5c98
• git.kernel.org https://git.kernel.org/stable/c/406aa86394ead347c47428fb51b6359bdaa2257d
• git.kernel.org https://git.kernel.org/stable/c/73ce72edd113374801045924d4417199963f73a3
• git.kernel.org https://git.kernel.org/stable/c/b0cc3ae97e893bf54bbce447f4e9fd2e0b88bff9
• git.kernel.org https://git.kernel.org/stable/c/c3a1cf78bd1bbb51b2cc5189b4743056553c1e0e
• git.kernel.org https://git.kernel.org/stable/c/c96c6f01d84b5c67db1bf1cc8591c0b7146826fc
• git.kernel.org https://git.kernel.org/stable/c/ef4851d8324fd978ca1ff9ec76a275438f887743

Remediation