Commit 222b01b7 authored by Stefano Brivio's avatar Stefano Brivio Committed by David S. Miller
Browse files

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: default avatarStefano Brivio <stefano.brivio@polimi.it>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 66dcb6bd
......@@ -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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