CVE-2022-49790

In the Linux kernel, the following vulnerability has been resolved:

Input: iforce - invert valid length check when fetching device IDs

syzbot is reporting uninitialized value at iforce_init_device() [1], for commit 6ac0aec6b0a6 (Input: iforce - allow callers supply data buffer when fetching device IDs) is checking that valid length is shorter than bytes to read. Since iforce_get_id_packet() stores valid length when returning 0, the caller needs to check that valid length is longer than or equals to bytes to read.

Affected Software

References

• https://git.kernel.org/stable/c/24cc679abbf31477d0cc6106ec83c2fbae6b3cdf
• https://git.kernel.org/stable/c/5d53797ce7ce8fb1d95a5bebc5efa9418c4217a3
• https://git.kernel.org/stable/c/6365569d62a75ddf53fb0c2936c16587a365984c
• https://git.kernel.org/stable/c/b8ebf250997c5fb253582f42bfe98673801ebebd
• https://git.kernel.org/stable/c/fdd57c20d4408cac3c3c535c120d244e083406c9