In the Linux kernel, the following vulnerability has been resolved:
Squashfs: check metadata block offset is within range
Syzkaller reports a "general protection fault in squashfs_copy_data"
This is ultimately caused by a corrupted index look-up table, which
produces a negative metadata block offset. This is subsequently passed to squashfs_copy_data (via
squashfs_read_metadata) where the negative offset causes an out of bounds
access. The fix is to check that the offset is within range in
squashfs_read_metadata.
This will trap this and other cases.
References 6
https://git.kernel.org/stable/c/01ee0bcc29864b78249308e8b35042b09bbf5fe3
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/0c8ab092aec3ac4294940054772d30b511b16713
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/3b9499e7d677dd4366239a292238489a804936b2
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/6b847d65f5b0065e02080c61fad93d57d6686383
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/9e9fa5ad37c9cbad73c165c7ff1e76e650825e7c
416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/fdb24a820a5832ec4532273282cbd4f22c291a0d
416baaa9-dc9f-4396-8d5f-8c081fb06d67