netdev - Inconsistent use of size argument in kzalloc and memcpy in 'drivers/net/ethernet/toshiba/ps3_gelic

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <570B75A4.5070904@wanadoo.fr>
Date:	Mon, 11 Apr 2016 12:00:04 +0200
From:	Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:	geoff@...radead.org, netdev@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org, kernel-janitors@...r.kernel.org
Subject: Inconsistent use of size argument in kzalloc and memcpy in
 'drivers/net/ethernet/toshiba/ps3_gelic_wireless.c'

Hi,

while looking at potential clean-up, I ended on the following code which 
looks spurious to me.

We allocate 'be16_to_cpu(scan_info->size)' bytes, but then copy 
'scan_info->size'.
This is not consistent.


I don't know which one is the correct one.


CJ

--- drivers/net/ethernet/toshiba/ps3_gelic_wireless.c
+++ /tmp/cocci-output-24201-0dddbd-ps3_gelic_wireless.c
@@ -1616,13 +1616,10 @@ static void gelic_wl_scan_complete_event
          target->valid = 1;
          target->eurus_index = i;
          kfree(target->hwinfo);
-        target->hwinfo = kzalloc(be16_to_cpu(scan_info->size),
-                     GFP_KERNEL);
          if (!target->hwinfo)
              continue;

          /* copy hw scan info */
-        memcpy(target->hwinfo, scan_info, scan_info->size);
          target->essid_len = strnlen(scan_info->essid,
                          sizeof(scan_info->essid));
          target->rate_len = 0;