From 222b01b7fef6e7ebea9e76ce08a783571569797b Mon Sep 17 00:00:00 2001
From: Stefano Brivio <stefano.brivio@polimi.it>
Date: Sun, 13 Jan 2008 18:35:52 +0100
Subject: [PATCH] b43legacy: fix use-after-free rfkill bug
Fix rfkill code which caused a use-after-free bug. Thanks to David
Woodhouse for spotting this out.
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Stefano Brivio <stefano.brivio@polimi.it>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---
drivers/net/wireless/b43legacy/rfkill.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/drivers/net/wireless/b43legacy/rfkill.c b/drivers/net/wireless/b43legacy/rfkill.c
index 520910fd5c45..d178dfbb1c9f 100644
--- a/drivers/net/wireless/b43legacy/rfkill.c
+++ b/drivers/net/wireless/b43legacy/rfkill.c
@@ -141,8 +141,11 @@ void b43legacy_rfkill_init(struct b43legacy_wldev *dev)
rfk->rfkill->user_claim_unsupported = 1;
rfk->poll_dev = input_allocate_polled_device();
- if (!rfk->poll_dev)
- goto err_free_rfk;
+ if (!rfk->poll_dev) {
+ rfkill_free(rfk->rfkill);
+ goto err_freed_rfk;
+ }
+
rfk->poll_dev->private = dev;
rfk->poll_dev->poll = b43legacy_rfkill_poll;
rfk->poll_dev->poll_interval = 1000; /* msecs */
@@ -178,8 +181,7 @@ err_unreg_rfk:
err_free_polldev:
input_free_polled_device(rfk->poll_dev);
rfk->poll_dev = NULL;
-err_free_rfk:
- rfkill_free(rfk->rfkill);
+err_freed_rfk:
rfk->rfkill = NULL;
out_error:
rfk->registered = 0;
@@ -198,7 +200,6 @@ void b43legacy_rfkill_exit(struct b43legacy_wldev *dev)
rfkill_unregister(rfk->rfkill);
input_free_polled_device(rfk->poll_dev);
rfk->poll_dev = NULL;
- rfkill_free(rfk->rfkill);
rfk->rfkill = NULL;
}
--
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