forked from pool/systemd
111 lines
4.5 KiB
Diff
111 lines
4.5 KiB
Diff
Based on 874bc134ac6504c45e94174e37af13ff21a6bfe2 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
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Date: Mon, 14 Jul 2014 16:53:23 -0400
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Subject: [PATCH] Clear up confusion wrt. ENTRY_SIZE_MAX and DATA_SIZE_MAX
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Define DATA_SIZE_MAX to mean the maximum size of a single
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field, and ENTRY_SIZE_MAX to mean the size of the whole
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entry, with some rough calculation of overhead over the payload.
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Check if entries are not too big when processing native journal
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messages.
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---
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src/journal/coredump.c | 6 +++---
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src/journal/journald-native.c | 25 +++++++++++++++++++++----
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2 files changed, 24 insertions(+), 7 deletions(-)
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--- src/journal/coredump.c
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+++ src/journal/coredump.c 2014-07-16 13:02:54.438235659 +0000
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@@ -38,10 +38,10 @@
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#include "cgroup-util.h"
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/* Few programs have less than 3MiB resident */
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-#define COREDUMP_MIN_START (3*1024*1024)
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+#define COREDUMP_MIN_START (3*1024*1024u)
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/* Make sure to not make this larger than the maximum journal entry
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- * size. See ENTRY_SIZE_MAX in journald-native.c. */
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-#define COREDUMP_MAX (767*1024*1024)
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+ * size. See DATA_SIZE_MAX in journald-native.c. */
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+#define COREDUMP_MAX (1024*1024*767u)
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enum {
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ARG_PID = 1,
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--- src/journal/journald-native.c
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+++ src/journal/journald-native.c 2014-07-16 12:50:45.000000000 +0000
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@@ -34,8 +34,8 @@
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/* Make sure not to make this smaller than the maximum coredump
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* size. See COREDUMP_MAX in coredump.c */
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-#define ENTRY_SIZE_MAX (1024*1024*768)
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-#define DATA_SIZE_MAX (1024*1024*768)
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+#define ENTRY_SIZE_MAX (1024*1024*770u)
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+#define DATA_SIZE_MAX (1024*1024*768u)
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static bool valid_user_field(const char *p, size_t l) {
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const char *a;
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@@ -86,7 +86,7 @@ void server_process_native_message(
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struct iovec *iovec = NULL;
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unsigned n = 0, j, tn = (unsigned) -1;
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const char *p;
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- size_t remaining, m = 0;
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+ size_t remaining, m = 0, entry_size = 0;
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int priority = LOG_INFO;
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char *identifier = NULL, *message = NULL;
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pid_t object_pid = 0;
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@@ -110,9 +110,17 @@ void server_process_native_message(
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if (e == p) {
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/* Entry separator */
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+
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+ if (entry_size + n + 1 > ENTRY_SIZE_MAX) { /* data + separators + trailer */
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+ log_debug("Entry is too big with %u properties and %zu bytes, ignoring.",
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+ n, entry_size);
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+ continue;
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+ }
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+
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server_dispatch_message(s, iovec, n, m, ucred, tv, label, label_len, NULL, priority, object_pid);
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n = 0;
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priority = LOG_INFO;
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+ entry_size = 0;
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p++;
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remaining--;
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@@ -150,6 +158,7 @@ void server_process_native_message(
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iovec[n].iov_base = (char*) p;
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iovec[n].iov_len = l;
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n++;
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+ entry_size += iovec[n].iov_len;
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/* We need to determine the priority
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* of this entry for the rate limiting
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@@ -218,7 +227,7 @@ void server_process_native_message(
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l = le64toh(l_le);
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if (l > DATA_SIZE_MAX) {
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- log_debug("Received binary data block too large, ignoring.");
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+ log_debug("Received binary data block of %zu bytes is too large, ignoring.", l);
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break;
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}
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@@ -242,6 +251,7 @@ void server_process_native_message(
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iovec[n].iov_base = k;
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iovec[n].iov_len = (e - p) + 1 + l;
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n++;
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+ entry_size += iovec[n].iov_len;
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} else
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free(k);
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@@ -255,6 +265,13 @@ void server_process_native_message(
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tn = n++;
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IOVEC_SET_STRING(iovec[tn], "_TRANSPORT=journal");
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+ entry_size += strlen("_TRANSPORT=journal");
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+
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+ if (entry_size + n + 1 > ENTRY_SIZE_MAX) { /* data + separators + trailer */
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+ log_debug("Entry is too big with %u properties and %zu bytes, ignoring.",
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+ n, entry_size);
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+ goto finish;
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+ }
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if (message) {
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if (s->forward_to_syslog)
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