mirror of https://gitee.com/openkylin/linux.git
9975a54b3c
bpf_prog_size(prog->len) is not the correct length we want to dump
back to user space. The code in bpf_prog_get_info_by_fd() uses this
to copy prog->insnsi to user space, but bpf_prog_size(prog->len) also
includes the size of struct bpf_prog itself plus program instructions
and is usually used either in context of accounting or for bpf_prog_alloc()
et al, thus we copy out of bounds in bpf_prog_get_info_by_fd()
potentially. Use the correct bpf_prog_insn_size() instead.
Fixes:
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||
|---|---|---|
| .. | ||
| Makefile | ||
| arraymap.c | ||
| bpf_lru_list.c | ||
| bpf_lru_list.h | ||
| cgroup.c | ||
| core.c | ||
| hashtab.c | ||
| helpers.c | ||
| inode.c | ||
| lpm_trie.c | ||
| map_in_map.c | ||
| map_in_map.h | ||
| percpu_freelist.c | ||
| percpu_freelist.h | ||
| stackmap.c | ||
| syscall.c | ||
| verifier.c | ||