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AP: Avoid NULL use with snprintf string

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identity_buf may be NULL here. Handle this case explicitly by printing
"N/A" instead relying on snprintf converting this to "(null)" or some
other value based on unexpected NULL pointer.

Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
This commit is contained in:
Andrei Otcheretianski 2019-04-03 18:17:16 +03:00 committed by Jouni Malinen
parent f6b5b6bb4f
commit 6bb9d9a8db
1 changed files with 2 additions and 1 deletions
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3
src/ap/ieee802_1x.c
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@ -2733,7 +2733,8 @@ int ieee802_1x_get_mib_sta(struct hostapd_data *hapd, struct sta_info *sta,
wpa_auth_sta_key_mgmt(sta->wpa_sm))) ? wpa_auth_sta_key_mgmt(sta->wpa_sm))) ?
1 : 2, 1 : 2,
(unsigned int) diff.sec, (unsigned int) diff.sec,
sm->identity ? (char *) sm->identity : identity_buf); sm->identity ? (char *) sm->identity :
(identity_buf ? identity_buf : "N/A"));
os_free(identity_buf); os_free(identity_buf);
if (os_snprintf_error(buflen - len, ret)) if (os_snprintf_error(buflen - len, ret))
return len; return len;