Sometimes pstore_console_write() will write records with zero size
to persistent ram zone, which is unnecessary. It will only increase
resource consumption. Also adjust ramoops_write_kmsg_hdr() to have
same logic if memory allocation fails.
Signed-off-by: Yue Hu <huyue2@yulong.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
{
struct pstore_record record;
+ if (!c)
+ return;
+
pstore_record_init(&record, psinfo);
record.type = PSTORE_TYPE_CONSOLE;
(time64_t)record->time.tv_sec,
record->time.tv_nsec / 1000,
record->compressed ? 'C' : 'D');
- WARN_ON_ONCE(!hdr);
- len = hdr ? strlen(hdr) : 0;
+ if (WARN_ON_ONCE(!hdr))
+ return 0;
+
+ len = strlen(hdr);
persistent_ram_write(prz, hdr, len);
kfree(hdr);