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Subject[PATCH 4.18 137/235] xtensa: ISS: dont allocate memory in platform_setup
Date
4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Max Filippov <jcmvbkbc@gmail.com>

commit ef439d49e0bfb26cd5f03c88b4cb7cc9073ed30c upstream.

Memory allocator is not initialized at that point yet, use static array
instead.

Cc: stable@vger.kernel.org
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
arch/xtensa/platforms/iss/setup.c | 25 +++++++++++++++----------
1 file changed, 15 insertions(+), 10 deletions(-)

--- a/arch/xtensa/platforms/iss/setup.c
+++ b/arch/xtensa/platforms/iss/setup.c
@@ -78,23 +78,28 @@ static struct notifier_block iss_panic_b

void __init platform_setup(char **p_cmdline)
{
+ static void *argv[COMMAND_LINE_SIZE / sizeof(void *)] __initdata;
+ static char cmdline[COMMAND_LINE_SIZE] __initdata;
int argc = simc_argc();
int argv_size = simc_argv_size();

if (argc > 1) {
- void **argv = alloc_bootmem(argv_size);
- char *cmdline = alloc_bootmem(argv_size);
- int i;
+ if (argv_size > sizeof(argv)) {
+ pr_err("%s: command line too long: argv_size = %d\n",
+ __func__, argv_size);
+ } else {
+ int i;

- cmdline[0] = 0;
- simc_argv((void *)argv);
+ cmdline[0] = 0;
+ simc_argv((void *)argv);

- for (i = 1; i < argc; ++i) {
- if (i > 1)
- strcat(cmdline, " ");
- strcat(cmdline, argv[i]);
+ for (i = 1; i < argc; ++i) {
+ if (i > 1)
+ strcat(cmdline, " ");
+ strcat(cmdline, argv[i]);
+ }
+ *p_cmdline = cmdline;
}
- *p_cmdline = cmdline;
}

atomic_notifier_chain_register(&panic_notifier_list, &iss_panic_block);

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