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author | Benny Halevy <bhalevy@panasas.com> | 2007-05-15 11:15:27 +0300 |
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committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-07-12 16:34:31 -0700 |
commit | 52f6b5e1f15fa8c06efa69a4b5faa69c04707c92 (patch) | |
tree | 3918f4d76adad79172ce42de5691bfc8c4781d40 /drivers/usb/core/config.c | |
parent | efdff60885e36b5091cdc47742dd5768ff4119be (diff) | |
download | op-kernel-dev-52f6b5e1f15fa8c06efa69a4b5faa69c04707c92.zip op-kernel-dev-52f6b5e1f15fa8c06efa69a4b5faa69c04707c92.tar.gz |
synchronization in usb_serial_put
I think there is a race between usb_serial_put() and
usb_serial_get_by_index() (and get_free_serial()) with regards
to handling the serial port refcount.
usb_serial_get_by_index() gets a reference on the serial port under
table_lock while return_serial releases all the returned ports
from the table under the same lock. However, the table_lock is not
taken around the call to kref_put, theoretically allowing to sneak
in and grab a reference after kref_put has already determined that
the reference count is zero (and before calling destroy_serial)
causing use after free.
Signed-off-by: Benny Halevy <bhalevy@ns1.bhalevy.com>
Cc: Oliver Neukum <oneukum@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb/core/config.c')
0 files changed, 0 insertions, 0 deletions