Searched hist:f4cf7a38 (Results 1 – 1 of 1) sorted by relevance
/openbmc/linux/drivers/tty/ |
H A D | tty_ldisc.c | f4cf7a38 Mon Mar 11 15:44:29 CDT 2013 Peter Hurley <peter@hurleysoftware.com> tty: Halt both ldiscs concurrently
The pty driver does not obtain an ldisc reference to the linked tty when writing. When the ldiscs are sequentially halted, it is possible for one ldisc to be halted, and before the second ldisc can be halted, a concurrent write schedules buffer work on the first ldisc. This can lead to an access-after-free error when the scheduled buffer work starts on the closed ldisc.
Prevent subsequent use after halt by performing each stage of the halt on both ttys.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> f4cf7a38 Mon Mar 11 15:44:29 CDT 2013 Peter Hurley <peter@hurleysoftware.com> tty: Halt both ldiscs concurrently The pty driver does not obtain an ldisc reference to the linked tty when writing. When the ldiscs are sequentially halted, it is possible for one ldisc to be halted, and before the second ldisc can be halted, a concurrent write schedules buffer work on the first ldisc. This can lead to an access-after-free error when the scheduled buffer work starts on the closed ldisc. Prevent subsequent use after halt by performing each stage of the halt on both ttys. Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|