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| author | Alan Cox <alan@linux.intel.com> | 2012-09-19 15:35:46 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-09-21 09:51:09 -0700 |
| commit | 43eca0aef73cc6f0d37ad139f1cbb810e62e409d (patch) | |
| tree | cbfe2836fa83eacbb4f08f31cb982fa20c8a8d80 /drivers/tty/pty.c | |
| parent | 84c3b84860440a9e3a3666c14112f41311b8f623 (diff) | |
| download | linux-43eca0aef73cc6f0d37ad139f1cbb810e62e409d.tar.gz linux-43eca0aef73cc6f0d37ad139f1cbb810e62e409d.tar.bz2 linux-43eca0aef73cc6f0d37ad139f1cbb810e62e409d.zip | |
serial_core: Fix race in uart_handle_dcd_change
If a serial driver is called post hangup with a second DCD event then we
will attempt to get the ldisc of NULL. Check we have a tty before trying to
do anything with it.
This is still only safe within the uart layer if the caller holds the
relevant uart locks. We could do with a version where the tty is passed for
more general use.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/pty.c')
0 files changed, 0 insertions, 0 deletions