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wpa_supplicant/hostapd: Fix uninitialized packet pointer on error

Description

wpa_supplicant/hostapd: Fix uninitialized packet pointer on error

The packet pointer (called packet) will remain uninitialized when
pcap_next_ex() returns an error. This occurs when the wlan
interface is shut down using ifconfig destroy. Adding a NULL
assignment to packet duplicates what pcap_next() does.

The reason we use pcap_next_ex() in this instance is because with
pacp_next() when we receive a null pointer if there was an error
or if no packets were read. With pcap_next_ex() we can differentiate
between an error and legitimately no packets were received.

PR: 270649
Reported by: Robert Morris <rtm@lcs.mit.edu>
Fixes: 6e5d01124fd4

(cherry picked from commit 953efa5b200f060564a090ab71b3d7f614a35e3f)

Details

Provenance
cyAuthored on Apr 6 2023, 4:07 AM
Parents
rG589b82662409: devd.conf.5: Fix a typo in the manual page
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