The patch titled
pSeries hvsi char driver null pointer deref
has been added to the -mm tree. Its filename is
pseries-hvsi-char-driver-null-pointer-deref.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: pSeries hvsi char driver null pointer deref
From: linas@xxxxxxxxxxxxxx (Linas Vepstas)
Under certain rare circumstances, it appears that there can be
be a NULL-pointer deref when a user fiddles with terminal
emeulation programs while outpu is being sent to the console.
This patch checks for and avoids a NULL-pointer deref.
Signed-off-by: Hollis Blanchard <hollisbl@xxxxxxxxxxxxxx>
Signed-off-by: Linas Vepstas <linas@xxxxxxxxxxxxxx>
Cc: Paul Fulghum <paulkf@xxxxxxxxxxxxx>
Cc: Alan Cox <alan@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
diff -puN drivers/char/hvsi.c~pseries-hvsi-char-driver-null-pointer-deref drivers/char/hvsi.c
--- a/drivers/char/hvsi.c~pseries-hvsi-char-driver-null-pointer-deref
+++ a/drivers/char/hvsi.c
@@ -311,7 +311,8 @@ static void hvsi_recv_control(struct hvs
/* CD went away; no more connection */
pr_debug("hvsi%i: CD dropped\n", hp->index);
hp->mctrl &= TIOCM_CD;
- if (!(hp->tty->flags & CLOCAL))
+ /* If userland hasn't done an open(2) yet, hp->tty is NULL. */
+ if (hp->tty && !(hp->tty->flags & CLOCAL))
*to_hangup = hp->tty;
}
break;
_
Patches currently in -mm which might be from hollisbl@xxxxxxxxxxxxxx are
pseries-hvsi-char-driver-null-pointer-deref.patch
-
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