From 37773c4e7f6156c34d852c154ef7ce818867d521 Mon Sep 17 00:00:00 2001 From: Maarten ter Huurne Date: Thu, 9 Oct 2014 11:48:30 +0200 Subject: [PATCH] fbcon: Fix option parsing control flow in fb_console_setup Since strsep is used to tokenize the options string, after each option match the code should use "continue" to get the next token from strsep. This patch applies this pattern consistently. Previously, for "scrollback:" and "map:" the parse code would return (unconditionally: strsep ensures *options != ','), causing any following option to be ignored, while for "vc:" the parse code would go on to parse further options within the same token, which could lead to invalid input being accepted. Signed-off-by: Maarten ter Huurne Acked-by: Paul Cercueil Signed-off-by: Tomi Valkeinen --- drivers/video/console/fbcon.c | 19 +++++++++---------- 1 file changed, 9 insertions(+), 10 deletions(-) diff --git a/drivers/video/console/fbcon.c b/drivers/video/console/fbcon.c index 57b1d44..eb976ee 100644 --- a/drivers/video/console/fbcon.c +++ b/drivers/video/console/fbcon.c @@ -448,8 +448,10 @@ static int __init fb_console_setup(char *this_opt) return 1; while ((options = strsep(&this_opt, ",")) != NULL) { - if (!strncmp(options, "font:", 5)) + if (!strncmp(options, "font:", 5)) { strlcpy(fontname, options + 5, sizeof(fontname)); + continue; + } if (!strncmp(options, "scrollback:", 11)) { options += 11; @@ -457,13 +459,9 @@ static int __init fb_console_setup(char *this_opt) fbcon_softback_size = simple_strtoul(options, &options, 0); if (*options == 'k' || *options == 'K') { fbcon_softback_size *= 1024; - options++; } - if (*options != ',') - return 1; - options++; - } else - return 1; + } + continue; } if (!strncmp(options, "map:", 4)) { @@ -478,8 +476,7 @@ static int __init fb_console_setup(char *this_opt) fbcon_map_override(); } - - return 1; + continue; } if (!strncmp(options, "vc:", 3)) { @@ -491,7 +488,8 @@ static int __init fb_console_setup(char *this_opt) if (*options++ == '-') last_fb_vc = simple_strtoul(options, &options, 10) - 1; fbcon_is_default = 0; - } + continue; + } if (!strncmp(options, "rotate:", 7)) { options += 7; @@ -499,6 +497,7 @@ static int __init fb_console_setup(char *this_opt) initial_rotation = simple_strtoul(options, &options, 0); if (initial_rotation > 3) initial_rotation = 0; + continue; } } return 1; -- 2.7.4