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b43: fix use-after-free rfkill bug 

Fix rfkill code which caused a use-after-free bug.

Signed-off-by: Stefano Brivio <stefano.brivio@polimi.it>
Acked-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Stefano Brivio 2008-01-13 18:30:14 +01:00 committed by John W. Linville
parent 8ff9d21ee2
commit a38db5b621
1 changed files with 6 additions and 5 deletions
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11
drivers/net/wireless/b43/rfkill.c
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@ -138,8 +138,11 @@ void b43_rfkill_init(struct b43_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 = b43_rfkill_poll;
rfk->poll_dev->poll_interval = 1000; /* msecs */
@ -175,8 +178,7 @@ 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;
@ -195,6 +197,5 @@ void b43_rfkill_exit(struct b43_wldev *dev)
rfkill_unregister(rfk->rfkill);
input_free_polled_device(rfk->poll_dev);
rfk->poll_dev = NULL;
rfkill_free(rfk->rfkill);
rfk->rfkill = NULL;
}