Mercurial > hg > dhcpcd
changeset 4517:ae3b0ea6c309 draft
sa: Ensure sa_addrtop has a buffer to write to
While here, if sa_family is AF_UNSPEC print a blank string.
| author | Roy Marples <roy@marples.name> |
|---|---|
| date | Sun, 05 May 2019 12:46:32 +0100 |
| parents | a519e4e62efd |
| children | e523b7420583 |
| files | src/sa.c |
| diffstat | 1 files changed, 7 insertions(+), 0 deletions(-) [+] |
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--- a/src/sa.c Sun May 05 12:45:29 2019 +0100 +++ b/src/sa.c Sun May 05 12:46:32 2019 +0100 @@ -364,6 +364,13 @@ const void *addr; assert(buf != NULL); + assert(len > 0); + + if (sa->sa_family == 0) { + *buf = '\0'; + return NULL; + } + #ifdef AF_LINK #ifndef CLLADDR #define CLLADDR(sdl) (const void *)((sdl)->sdl_data + (sdl)->sdl_nlen)