diff options
| author | Ishan Agrawal <iagrawal9990@gmail.com> | 2026-08-09 06:24:18 +0000 |
|---|---|---|
| committer | Kristof Provost <kp@FreeBSD.org> | 2026-08-10 14:33:32 +0000 |
| commit | 0f2e98c1515d2bfc05701d5e19aac16a985ae5f4 (patch) | |
| tree | 7419cb521b6df297c2480c84ca14a83cbec7f5f0 | |
| parent | 2ef4baaffce0ab71491085e68fefc92eff8e715c (diff) | |
libsysdecode: verify decoder tables are sorted
Add assertions to validate decoder table ordering required by
binary search.
Signed-off-by: Ishan Agrawal <iagrawal9990@gmail.com>
Sponsored-by: Google LLC (GSoC 2026)
Reviewed by: kp
| -rw-r--r-- | lib/libsysdecode/netlink.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/lib/libsysdecode/netlink.c b/lib/libsysdecode/netlink.c index 2785b23cb98b..22ccf1fc2acb 100644 --- a/lib/libsysdecode/netlink.c +++ b/lib/libsysdecode/netlink.c @@ -340,6 +340,28 @@ static const struct nlattr_decoder nla_d_clear_states[] = { }; NL_DECLARE_ATTR_DECODER(killclear_states_decoder, nla_d_clear_states); +static inline void +nl_verify_decoders(const struct nlattr_decoder_set **decoder, size_t count) +{ + for (size_t i = 0; i < count; i++) { + const struct nlattr_decoder_set *p = decoder[i]; + for (size_t j = 1; j < p->count; j++) { + assert(p->decoders[j].type > p->decoders[j-1].type); + } + } +} +#define NL_VERIFY_DECODERS(_p) nl_verify_decoders((_p), nitems(_p)) + +static const struct nlattr_decoder_set *all_decoders[] = { + &getrules_decoder, + &set_limit_decoder, + &addr_wrap_decoder, + &pool_addr_decoder, + &addr_decoder, + &rule_addr_decoder, + &killclear_states_decoder, +}; + static const struct pfnl_cmd_decoder cmd_decoder[] = { { .cmd_num = PFNL_CMD_GETRULES, .ds = &getrules_decoder }, { .cmd_num = PFNL_CMD_KILLSTATES, .ds = &killclear_states_decoder }, @@ -390,6 +412,8 @@ sysdecode_netlink(FILE *fp, const void *buf, size_t len, int protocol) return (false); if (family_table == NULL) { + NL_VERIFY_DECODERS(all_decoders); + family_table = malloc((num_family + 1) * sizeof(struct name_table)); family_table[num_family] = (struct name_table){0, NULL}; |