If the variable buffer is a null pointer, it may cause the kernel to crash. Signed-off-by: Liam Ni <zhiguangni01@xxxxxxxxx> --- arch/x86/boot/cmdline.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/boot/cmdline.c b/arch/x86/boot/cmdline.c index 21d56ae83cdf..d0809f66054c 100644 --- a/arch/x86/boot/cmdline.c +++ b/arch/x86/boot/cmdline.c @@ -39,7 +39,7 @@ int __cmdline_find_option(unsigned long cmdline_ptr, const char *option, char *b st_bufcpy /* Copying this to buffer */ } state = st_wordstart; - if (!cmdline_ptr) + if (!cmdline_ptr || buffer == NULL) return -1; /* No command line */ cptr = cmdline_ptr & 0xf; -- 2.25.1
