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| author | Marcel Holtmann <marcel@holtmann.org> | 2007-05-05 00:36:10 +0200 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2007-05-05 00:36:10 +0200 |
| commit | 77f2a45fa1ba33147fd6cc8ae546188504a822cd (patch) | |
| tree | c714c55fde74c5dd82b031b8ac605121a2b3f5b7 /net | |
| parent | 48db9ca4f2ac9f39eb90ccb12ad3ca7b645a552c (diff) | |
| download | linux-3.10-77f2a45fa1ba33147fd6cc8ae546188504a822cd.tar.gz linux-3.10-77f2a45fa1ba33147fd6cc8ae546188504a822cd.tar.bz2 linux-3.10-77f2a45fa1ba33147fd6cc8ae546188504a822cd.zip | |
[Bluetooth] Check that device is in rfcomm_dev_list before deleting
If RFCOMM_RELEASE_ONHUP flag is on and rfcomm_release_dev is called
before connection is closed, rfcomm_dev is deleted twice from the
rfcomm_dev_list and refcount is messed up. This patch adds a check
before deleting device that the device actually is listed.
Signed-off-by: Ville Tervo <ville.tervo@nokia.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/bluetooth/rfcomm/tty.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/net/bluetooth/rfcomm/tty.c b/net/bluetooth/rfcomm/tty.c index 9a7a44fc721..b2b1cceb102 100644 --- a/net/bluetooth/rfcomm/tty.c +++ b/net/bluetooth/rfcomm/tty.c @@ -517,9 +517,10 @@ static void rfcomm_dev_state_change(struct rfcomm_dlc *dlc, int err) if (dlc->state == BT_CLOSED) { if (!dev->tty) { if (test_bit(RFCOMM_RELEASE_ONHUP, &dev->flags)) { - rfcomm_dev_hold(dev); - rfcomm_dev_del(dev); + if (rfcomm_dev_get(dev->id) == NULL) + return; + rfcomm_dev_del(dev); /* We have to drop DLC lock here, otherwise rfcomm_dev_put() will dead lock if it's the last reference. */ @@ -974,8 +975,12 @@ static void rfcomm_tty_hangup(struct tty_struct *tty) rfcomm_tty_flush_buffer(tty); - if (test_bit(RFCOMM_RELEASE_ONHUP, &dev->flags)) + if (test_bit(RFCOMM_RELEASE_ONHUP, &dev->flags)) { + if (rfcomm_dev_get(dev->id) == NULL) + return; rfcomm_dev_del(dev); + rfcomm_dev_put(dev); + } } static int rfcomm_tty_read_proc(char *buf, char **start, off_t offset, int len, int *eof, void *unused) |