kexec:i386/kexec-[bzImage|elf-x86]:x86_64/kexec-bzImage64: Use "\0" as command line instead of empty command line
This patch prevents the problems to happen below:
In setup_linux_bootloader_parameters_high
120 cmdline_ptr = ((char *)real_mode) + cmdline_offset;
121 memcpy(cmdline_ptr, cmdline, cmdline_len);
122 cmdline_ptr[cmdline_len - 1] = '\0';
if cmdline_len == 0, Line 122 will corrupt kernel16 buf just before the commandline.
And in do_bzImage_load, for example,
369 cmdline_end = setup_base + kern16_size_needed + command_line_len - 1;
370 elf_rel_set_symbol(&info->rhdr, "cmdline_end", &cmdline_end,
371 sizeof(unsigned long));
Line 369 will go wrong, too.
Signed-off-by: Wang YanQing <udknight@gmail.com>
Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
3 files changed
