From: Masami Hiramatsu <mhiramat@xxxxxxxxxx> Since the parse_args() stops parsing at '--', bootconfig_params() will never get the '--' as param and initargs_found never be true. In the result, if we pass some init arguments via the bootconfig, those are always appended to the kernel command line with '--' even if the kernel command line already has '--'. To fix this correctly, check the return value of parse_args() and set initargs_found true if the return value is not an error but a valid address. Link: https://lkml.kernel.org/r/159650953285.270383.14822353843556363851.stgit@devnote2 Fixes: f61872bb58a1 ("bootconfig: Use parse_args() to find bootconfig and '--'") Cc: stable@xxxxxxxxxxxxxxx Reported-by: Arvind Sankar <nivedita@xxxxxxxxxxxx> Suggested-by: Arvind Sankar <nivedita@xxxxxxxxxxxx> Signed-off-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx> Signed-off-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx> --- init/main.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/init/main.c b/init/main.c index 0ead83e86b5a..883ded3638e5 100644 --- a/init/main.c +++ b/init/main.c @@ -387,8 +387,6 @@ static int __init bootconfig_params(char *param, char *val, { if (strcmp(param, "bootconfig") == 0) { bootconfig_found = true; - } else if (strcmp(param, "--") == 0) { - initargs_found = true; } return 0; } @@ -399,19 +397,23 @@ static void __init setup_boot_config(const char *cmdline) const char *msg; int pos; u32 size, csum; - char *data, *copy; + char *data, *copy, *err; int ret; /* Cut out the bootconfig data even if we have no bootconfig option */ data = get_boot_config_from_initrd(&size, &csum); strlcpy(tmp_cmdline, boot_command_line, COMMAND_LINE_SIZE); - parse_args("bootconfig", tmp_cmdline, NULL, 0, 0, 0, NULL, - bootconfig_params); + err = parse_args("bootconfig", tmp_cmdline, NULL, 0, 0, 0, NULL, + bootconfig_params); - if (!bootconfig_found) + if (IS_ERR(err) || !bootconfig_found) return; + /* parse_args() stops at '--' and returns an address */ + if (err) + initargs_found = true; + if (!data) { pr_err("'bootconfig' found on command line, but no bootconfig found\n"); return; -- 2.26.2
