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| author | Aaron Thompson <dev@aaront.org> | 2024-10-04 23:04:10 +0000 |
|---|---|---|
| committer | Luiz Augusto von Dentz <luiz.von.dentz@intel.com> | 2024-10-16 16:09:25 -0400 |
| commit | 1db4564f101b47188c1b71696bd342ef09172b22 (patch) | |
| tree | 62777784bfc17659cccda75676977215a237fbc0 /net | |
| parent | d458cd1221e9e56da3b2cc5518ad3225caa91f20 (diff) | |
| download | lwn-1db4564f101b47188c1b71696bd342ef09172b22.tar.gz lwn-1db4564f101b47188c1b71696bd342ef09172b22.zip | |
Bluetooth: Remove debugfs directory on module init failure
If bt_init() fails, the debugfs directory currently is not removed. If
the module is loaded again after that, the debugfs directory is not set
up properly due to the existing directory.
# modprobe bluetooth
# ls -laF /sys/kernel/debug/bluetooth
total 0
drwxr-xr-x 2 root root 0 Sep 27 14:26 ./
drwx------ 31 root root 0 Sep 27 14:25 ../
-r--r--r-- 1 root root 0 Sep 27 14:26 l2cap
-r--r--r-- 1 root root 0 Sep 27 14:26 sco
# modprobe -r bluetooth
# ls -laF /sys/kernel/debug/bluetooth
ls: cannot access '/sys/kernel/debug/bluetooth': No such file or directory
#
# modprobe bluetooth
modprobe: ERROR: could not insert 'bluetooth': Invalid argument
# dmesg | tail -n 6
Bluetooth: Core ver 2.22
NET: Registered PF_BLUETOOTH protocol family
Bluetooth: HCI device and connection manager initialized
Bluetooth: HCI socket layer initialized
Bluetooth: Faking l2cap_init() failure for testing
NET: Unregistered PF_BLUETOOTH protocol family
# ls -laF /sys/kernel/debug/bluetooth
total 0
drwxr-xr-x 2 root root 0 Sep 27 14:31 ./
drwx------ 31 root root 0 Sep 27 14:26 ../
#
# modprobe bluetooth
# dmesg | tail -n 7
Bluetooth: Core ver 2.22
debugfs: Directory 'bluetooth' with parent '/' already present!
NET: Registered PF_BLUETOOTH protocol family
Bluetooth: HCI device and connection manager initialized
Bluetooth: HCI socket layer initialized
Bluetooth: L2CAP socket layer initialized
Bluetooth: SCO socket layer initialized
# ls -laF /sys/kernel/debug/bluetooth
total 0
drwxr-xr-x 2 root root 0 Sep 27 14:31 ./
drwx------ 31 root root 0 Sep 27 14:26 ../
#
Cc: stable@vger.kernel.org
Fixes: ffcecac6a738 ("Bluetooth: Create root debugfs directory during module init")
Signed-off-by: Aaron Thompson <dev@aaront.org>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/bluetooth/af_bluetooth.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/bluetooth/af_bluetooth.c b/net/bluetooth/af_bluetooth.c index 9425d0680844..e39fba5565c5 100644 --- a/net/bluetooth/af_bluetooth.c +++ b/net/bluetooth/af_bluetooth.c @@ -825,6 +825,7 @@ cleanup_sysfs: bt_sysfs_cleanup(); cleanup_led: bt_leds_cleanup(); + debugfs_remove_recursive(bt_debugfs); return err; } |