From: Willy Tarreau <w...@1wt.eu> commit 3e21f4af170bebf47c187c1ff8bf155583c9f3b1 upstream
The lp_setup() code doesn't apply any bounds checking when passing "lp=none", and only in this case, resulting in an overflow of the parport_nr[] array. All versions in Git history are affected. Reported-By: Roee Hay <roee....@hcl.com> Cc: Ben Hutchings <b...@decadent.org.uk> Cc: sta...@vger.kernel.org Signed-off-by: Willy Tarreau <w...@1wt.eu> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> Signed-off-by: Jianchuan Wang <jianchuan.w...@windriver.com> --- drivers/char/lp.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/char/lp.c b/drivers/char/lp.c index 5b67427..841fd59 100644 --- a/drivers/char/lp.c +++ b/drivers/char/lp.c @@ -859,7 +859,11 @@ static int __init lp_setup (char *str) } else if (!strcmp(str, "auto")) { parport_nr[0] = LP_PARPORT_AUTO; } else if (!strcmp(str, "none")) { - parport_nr[parport_ptr++] = LP_PARPORT_NONE; + if (parport_ptr < LP_NO) + parport_nr[parport_ptr++] = LP_PARPORT_NONE; + else + printk(KERN_INFO "lp: too many ports, %s ignored.\n", + str); } else if (!strcmp(str, "reset")) { reset = 1; } -- 2.8.1 -- _______________________________________________ linux-yocto mailing list linux-yocto@yoctoproject.org https://lists.yoctoproject.org/listinfo/linux-yocto