diff options
| author | Peter Hurley <[email protected]> | 2013-11-19 08:46:27 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <[email protected]> | 2013-11-25 08:56:49 -0800 |
| commit | d4855e1fc03c2bb32dd64badf51cec5a2a26ab2a (patch) | |
| tree | d518a39edafd6f58befb8d9f048ae8294b97b0b0 /lib/test-string_helpers.c | |
| parent | 3dcf344bef2e9b9910817b210783d79c383bc849 (diff) | |
tty: Reset hupped state on open
A common security idiom is to hangup the current tty (via vhangup())
after forking but before execing a root shell. This hangs up any
existing opens which other processes may have and ensures subsequent
opens have the necessary permissions to open the root shell tty/pty.
Reset the TTY_HUPPED state after the driver has successfully
returned the opened tty (perform the reset while the tty is locked
to avoid racing with concurrent hangups).
Reported-by: Heorhi Valakhanovich <[email protected]>
Signed-off-by: Peter Hurley <[email protected]>
Cc: stable <[email protected]> # 3.12
Tested-by: Heorhi Valakhanovich <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Diffstat (limited to 'lib/test-string_helpers.c')
0 files changed, 0 insertions, 0 deletions