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| author | Jiri Slaby <jslaby@suse.cz> | 2011-06-05 14:16:17 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-06-07 10:36:47 -0700 |
| commit | 2872628680bad71a6734e7d379168f990a91cc09 (patch) | |
| tree | 651549c2eba524cd8e35c61d6fafc083afdeb3fd /drivers/tty | |
| parent | 92f6fa09bd453ffe3351fa1f1377a1b7cfa911e6 (diff) | |
| download | linux-2872628680bad71a6734e7d379168f990a91cc09.tar.gz linux-2872628680bad71a6734e7d379168f990a91cc09.tar.bz2 linux-2872628680bad71a6734e7d379168f990a91cc09.zip | |
TTY: ntty, add one more sanity check
With the previous patch, we fixed another bug where read_buf was freed
while we still was in n_tty_read. We currently check whether read_buf
is NULL at the start of the function. Add one more check after we wake
up from waiting for input.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/n_tty.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c index 0ad32888091c..c3954fbf6ac4 100644 --- a/drivers/tty/n_tty.c +++ b/drivers/tty/n_tty.c @@ -1815,6 +1815,7 @@ do_it_again: /* FIXME: does n_tty_set_room need locking ? */ n_tty_set_room(tty); timeout = schedule_timeout(timeout); + BUG_ON(!tty->read_buf); continue; } __set_current_state(TASK_RUNNING); |