From b01f8a7a7a3c1bc69f2d32f8a30b1f0f94801f75 Mon Sep 17 00:00:00 2001 From: Thierry Reding Date: Tue, 16 Aug 2016 16:45:38 +0200 Subject: [PATCH] net: ipconfig: Fix more use after free While commit 592f11a80296 ("net: ipconfig: fix use after free") avoids the use after free, the resulting code still ends up calling both the ic_setup_if() and ic_setup_routes() after calling ic_close_devs(), and access to the device is still required. Move the call to ic_close_devs() to the very end of the function. Signed-off-by: Thierry Reding Signed-off-by: David S. Miller --- net/ipv4/ipconfig.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/net/ipv4/ipconfig.c b/net/ipv4/ipconfig.c index 66c2fe602810e..ba9cbeafbb2e0 100644 --- a/net/ipv4/ipconfig.c +++ b/net/ipv4/ipconfig.c @@ -1530,12 +1530,14 @@ static int __init ip_auto_config(void) * Close all network devices except the device we've * autoconfigured and set up routes. */ - ic_close_devs(); if (ic_setup_if() < 0 || ic_setup_routes() < 0) - return -1; + err = -1; + else + err = 0; + ic_close_devs(); - return 0; + return err; } late_initcall(ip_auto_config); -- 2.39.5