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video: fbdev: via: check the return value of kstrdup()

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kstrdup() is a memory allocation function which can return NULL when
some internal memory errors happen. It is better to check the return
value of it to catch the error in time during the setup of viafb.

Signed-off-by: Xiaoke Wang <xkernel.wang@foxmail.com>
Signed-off-by: Helge Deller <deller@gmx.de>
This commit is contained in:
Xiaoke Wang 2022-02-21 18:37:34 +08:00 committed by Helge Deller
parent 0714ea330b
commit 997403e778
1 changed files with 10 additions and 0 deletions
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10
drivers/video/fbdev/via/viafbdev.c
View file

@ -1939,8 +1939,12 @@ static int __init viafb_setup(void)
if (!strncmp(this_opt, "viafb_mode1=", 12)) {
viafb_mode1 = kstrdup(this_opt + 12, GFP_KERNEL);
if (!viafb_mode1)
return -ENOMEM;
} else if (!strncmp(this_opt, "viafb_mode=", 11)) {
viafb_mode = kstrdup(this_opt + 11, GFP_KERNEL);
if (!viafb_mode)
return -ENOMEM;
} else if (!strncmp(this_opt, "viafb_bpp1=", 11)) {
if (kstrtouint(this_opt + 11, 0, &viafb_bpp1) < 0)
return -EINVAL;
@ -1969,6 +1973,8 @@ static int __init viafb_setup(void)
return -EINVAL;
} else if (!strncmp(this_opt, "viafb_active_dev=", 17)) {
viafb_active_dev = kstrdup(this_opt + 17, GFP_KERNEL);
if (!viafb_active_dev)
return -ENOMEM;
} else if (!strncmp(this_opt,
"viafb_display_hardware_layout=", 30)) {
if (kstrtoint(this_opt + 30, 0,
@ -1995,8 +2001,12 @@ static int __init viafb_setup(void)
return -EINVAL;
} else if (!strncmp(this_opt, "viafb_lcd_port=", 15)) {
viafb_lcd_port = kstrdup(this_opt + 15, GFP_KERNEL);
if (!viafb_lcd_port)
return -ENOMEM;
} else if (!strncmp(this_opt, "viafb_dvi_port=", 15)) {
viafb_dvi_port = kstrdup(this_opt + 15, GFP_KERNEL);
if (!viafb_dvi_port)
return -ENOMEM;
}
}
return 0;