diff options
| author | Stefano Brivio <stefano.brivio@polimi.it> | 2008-01-13 18:35:52 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2008-01-28 15:10:10 -0800 |
| commit | 222b01b7fef6e7ebea9e76ce08a783571569797b (patch) | |
| tree | a95619da0e60695a39e52b0229625ad27cb4e5b2 /drivers | |
| parent | 66dcb6bdc57a799a16e8d2942b9ab38b8546eb3b (diff) | |
| download | linux-222b01b7fef6e7ebea9e76ce08a783571569797b.tar.gz linux-222b01b7fef6e7ebea9e76ce08a783571569797b.tar.bz2 linux-222b01b7fef6e7ebea9e76ce08a783571569797b.zip | |
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/b43legacy/rfkill.c | 11 |
1 files 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; } |