diff options
| author | KAMBAROV, ZAUR <kambarov@berkeley.edu> | 2005-06-29 07:45:12 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-29 08:20:34 +0400 |
| commit | 69f63c5c34d0b34ee2cbf10c5ff7fcff0404879e (patch) | |
| tree | 1023d240c44cc2a137c9cca4b6c015e584e30356 /drivers/char/tty_ioctl.c | |
| parent | c7f1721ef284c6e8257c7471a02148db76105036 (diff) | |
| download | linux-69f63c5c34d0b34ee2cbf10c5ff7fcff0404879e.tar.xz | |
[PATCH] coverity: tty_ldisc_ref return null check
We add a check of the return value of tty_ldisc_ref(), which
is checked 7 out of 8 times, e.g.:
149 ld = tty_ldisc_ref(tty);
150 if (ld != NULL) {
151 if (ld->set_termios)
152 (ld->set_termios)(tty, &old_termios);
153 tty_ldisc_deref(ld);
154 }
This defect was found automatically by Coverity Prevent, a static analysis
tool.
(akpm: presumably `ld' is never NULL. Oh well)
Signed-off-by: Zaur Kambarov <zkambarov@coverity.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/char/tty_ioctl.c')
| -rw-r--r-- | drivers/char/tty_ioctl.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/char/tty_ioctl.c b/drivers/char/tty_ioctl.c index 58597993954f..f19cf9d7792d 100644 --- a/drivers/char/tty_ioctl.c +++ b/drivers/char/tty_ioctl.c @@ -476,11 +476,11 @@ int n_tty_ioctl(struct tty_struct * tty, struct file * file, ld = tty_ldisc_ref(tty); switch (arg) { case TCIFLUSH: - if (ld->flush_buffer) + if (ld && ld->flush_buffer) ld->flush_buffer(tty); break; case TCIOFLUSH: - if (ld->flush_buffer) + if (ld && ld->flush_buffer) ld->flush_buffer(tty); /* fall through */ case TCOFLUSH: |