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misc/libssh2_copy_string: avoid malloc zero bytes

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Avoids the inconsistent malloc return code for malloc(0)

Closes #686
This commit is contained in:
Daniel Stenberg
2022-03-21 09:31:39 +01:00
parent 049003c3d6
commit e7e1312b0c
1 changed files with 10 additions and 4 deletions
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14
src/misc.c
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@@ -817,12 +817,18 @@ int _libssh2_copy_string(LIBSSH2_SESSION *session, struct string_buf *buf,
return -1;
}
*outbuf = LIBSSH2_ALLOC(session, str_len);
if(*outbuf) {
memcpy(*outbuf, str, str_len);
if(str_len) {
*outbuf = LIBSSH2_ALLOC(session, str_len);
if(*outbuf) {
memcpy(*outbuf, str, str_len);
}
else {
return -1;
}
}
else {
return -1;
*outlen = 0;
*outbuf = NULL;
}
if(outlen)