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[refer #395] Check WAL record CRC in waldecoder (#396)

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Konstantin Knizhnik
2021-08-05 16:57:57 +03:00
committed by GitHub
parent e59e0ae2dc
commit 3ca3394170
1 changed files with 9 additions and 0 deletions
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9
pageserver/src/waldecoder.rs
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@@ -4,6 +4,7 @@
//!
use bytes::{Buf, BufMut, Bytes, BytesMut};
use log::*;
use crc32c::*;
use postgres_ffi::pg_constants;
use postgres_ffi::xlog_utils::*;
use postgres_ffi::XLogLongPageHeaderData;
@@ -166,6 +167,14 @@ impl WalStreamDecoder {
// XLOG_SWITCH records are special. If we see one, we need to skip
// to the next WAL segment.
let xlogrec = XLogRecord::from_bytes(&mut buf);
let mut crc = crc32c_append(0, &recordbuf[XLOG_RECORD_CRC_OFFS+4..]);
crc = crc32c_append(crc, &recordbuf[0..XLOG_RECORD_CRC_OFFS]);
if crc != xlogrec.xl_crc {
return Err(WalDecodeError {
msg: "WAL record crc mismatch".into(),
lsn: self.lsn,
});
}
if xlogrec.is_xlog_switch_record() {
trace!("saw xlog switch record at {}", self.lsn);
self.padlen =