diff options
| -rw-r--r-- | fs/pstore/ram.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c index 631ae057ab53..bafbab2dd039 100644 --- a/fs/pstore/ram.c +++ b/fs/pstore/ram.c @@ -437,6 +437,17 @@ static int notrace ramoops_pstore_write(struct pstore_record *record) prz = cxt->dprzs[cxt->dump_write_cnt]; + /* + * Since this is a new crash dump, we need to reset the buffer in + * case it still has an old dump present. Without this, the new dump + * will get appended, which would seriously confuse anything trying + * to check dump file contents. Specifically, ramoops_read_kmsg_hdr() + * expects to find a dump header in the beginning of buffer data, so + * we must to reset the buffer values, in order to ensure that the + * header will be written to the beginning of the buffer. + */ + persistent_ram_zap(prz); + /* Build header and append record contents. */ hlen = ramoops_write_kmsg_hdr(prz, record); size = record->size; |