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-rw-r--r--init/main.c28
1 files changed, 21 insertions, 7 deletions
diff --git a/init/main.c b/init/main.c
index dd7da62d99a5..f174a59d3903 100644
--- a/init/main.c
+++ b/init/main.c
@@ -336,28 +336,39 @@ u32 boot_config_checksum(unsigned char *p, u32 size)
return ret;
}
-static void __init setup_boot_config(void)
+static void __init setup_boot_config(const char *cmdline)
{
u32 size, csum;
char *data, *copy;
+ const char *p;
u32 *hdr;
- if (!initrd_end)
+ p = strstr(cmdline, "bootconfig");
+ if (!p || (p != cmdline && !isspace(*(p-1))) ||
+ (p[10] && !isspace(p[10])))
return;
+ if (!initrd_end)
+ goto not_found;
+
hdr = (u32 *)(initrd_end - 8);
size = hdr[0];
csum = hdr[1];
- if (size >= XBC_DATA_MAX)
+ if (size >= XBC_DATA_MAX) {
+ pr_err("bootconfig size %d greater than max size %d\n",
+ size, XBC_DATA_MAX);
return;
+ }
data = ((void *)hdr) - size;
if ((unsigned long)data < initrd_start)
- return;
+ goto not_found;
- if (boot_config_checksum((unsigned char *)data, size) != csum)
+ if (boot_config_checksum((unsigned char *)data, size) != csum) {
+ pr_err("bootconfig checksum failed\n");
return;
+ }
copy = memblock_alloc(size + 1, SMP_CACHE_BYTES);
if (!copy) {
@@ -377,9 +388,12 @@ static void __init setup_boot_config(void)
/* Also, "init." keys are init arguments */
extra_init_args = xbc_make_cmdline("init");
}
+ return;
+not_found:
+ pr_err("'bootconfig' found on command line, but no bootconfig found\n");
}
#else
-#define setup_boot_config() do { } while (0)
+#define setup_boot_config(cmdline) do { } while (0)
#endif
/* Change NUL term back to "=", to make "param" the whole string. */
@@ -760,7 +774,7 @@ asmlinkage __visible void __init start_kernel(void)
pr_notice("%s", linux_banner);
early_security_init();
setup_arch(&command_line);
- setup_boot_config();
+ setup_boot_config(command_line);
setup_command_line(command_line);
setup_nr_cpu_ids();
setup_per_cpu_areas();