CVE-2024-57890

In the Linux kernel, the following vulnerability has been resolved: RDMA/uverbs: Prevent integer overflow issue In the expression "cmd.wqe_size * cmd.wr_count", both variables are u32 values that come from the user so the multiplication can lead to integer wrapping. Then we pass the result to uverbs_request_next_ptr() which also could potentially wrap. The "cmd.sge_count * sizeof(struct ib_uverbs_sge)" multiplication can also overflow on 32bit systems although it's fine on 64bit systems. This patch does two things. First, I've re-arranged the condition in uverbs_request_next_ptr() so that the use controlled variable "len" is on one side of the comparison by itself without any math. Then I've modified all the callers to use size_mul() for the multiplications.

• linux linux kernel (>= 2.6.15 < 5.4.289) • linux linux kernel (>= 5.5 < 5.10.233) • linux linux kernel (>= 5.11 < 5.15.176) • linux linux kernel (>= 5.16 < 6.1.124) • linux linux kernel (>= 6.2 < 6.6.70) • linux linux kernel (>= 6.7 < 6.12.9) • linux linux kernel 6.13