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(parent: 2844866) | patch
libbpf: Fix potential multiplication overflow in mmap() size calculation
authorAndrii Nakryiko <andriin@fb.com>
Fri, 17 Jan 2020 06:08:00 +0000 (22:08 -0800)
committerAlexei Starovoitov <ast@kernel.org>
Fri, 17 Jan 2020 16:33:18 +0000 (08:33 -0800)
commita4b4a1d5e36506571f631352aaac68488563a349
treeed0c7062d3151b9b6cfcb9707830726159069f84tree | snapshot
parent2844866e9ad21618d4f8d132953d38672fe74a3ccommit | diff
libbpf: Fix potential multiplication overflow in mmap() size calculation

Prevent potential overflow performed in 32-bit integers, before assigning
result to size_t. Reported by LGTM static analysis.

Fixes: ac9baa3fdfc8 ("libbpf: Refactor global data map initialization")
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200117060801.1311525-4-andriin@fb.com
tools/lib/bpf/libbpf.c diff | blob | history
Linux Kernel Source Tree.