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gnrc_uhcpc: fix NULL pointer dereference

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This commit is contained in:
Martine S. Lenders 2020-03-03 13:56:56 +01:00
parent b050608771
commit 6c5d9e4f39
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GPG Key ID: CCD317364F63286F
1 changed files with 2 additions and 1 deletions
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sys/net/gnrc/application_layer/uhcpc/gnrc_uhcpc.c
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@ -64,7 +64,8 @@ static ipv6_addr_t _prefix;
static bool _ctx_match(const gnrc_sixlowpan_ctx_t *ctx, static bool _ctx_match(const gnrc_sixlowpan_ctx_t *ctx,
const ipv6_addr_t *prefix, uint8_t prefix_len) const ipv6_addr_t *prefix, uint8_t prefix_len)
{ {
return (ctx->prefix_len == prefix_len) && return (ctx != NULL) &&
(ctx->prefix_len == prefix_len) &&
(ipv6_addr_match_prefix(&ctx->prefix, prefix) >= prefix_len); (ipv6_addr_match_prefix(&ctx->prefix, prefix) >= prefix_len);
} }