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-rw-r--r--man/sd_journal_print.xml2
-rw-r--r--man/udev.xml2
-rw-r--r--src/journal/journal-verify.c217
3 files changed, 169 insertions, 52 deletions
diff --git a/man/sd_journal_print.xml b/man/sd_journal_print.xml
index 7742268f5d..cdaea8c2ef 100644
--- a/man/sd_journal_print.xml
+++ b/man/sd_journal_print.xml
@@ -138,7 +138,7 @@
of any size and format. It is highly recommended to
submit text strings formatted in the UTF-8 character
encoding only, and submit binary fields only when
- formatting in UTf-8 strings is not sensible. A number
+ formatting in UTF-8 strings is not sensible. A number
of well known fields are defined, see
<citerefentry><refentrytitle>systemd.journal-fields</refentrytitle><manvolnum>7</manvolnum></citerefentry>
for details, but additional application defined fields
diff --git a/man/udev.xml b/man/udev.xml
index e253a0677a..964aeda802 100644
--- a/man/udev.xml
+++ b/man/udev.xml
@@ -317,7 +317,7 @@
<para>The name of a symlink targeting the node. Every matching rule adds
this value to the list of symlinks to be created.</para>
<para>The set of characters to name a symlink is limited. Allowed
- characters are [0-9A-Za-z#+-.:=@_/], valid utf8 character sequences,
+ characters are [0-9A-Za-z#+-.:=@_/], valid UTF-8 character sequences,
and "\x00" hex encoding. All other characters are replaced by
a '_' character.</para>
<para>Multiple symlinks may be specified by separating the names by the
diff --git a/src/journal/journal-verify.c b/src/journal/journal-verify.c
index 01c89bc8a4..781b1ee1de 100644
--- a/src/journal/journal-verify.c
+++ b/src/journal/journal-verify.c
@@ -34,10 +34,15 @@
#include "compress.h"
#include "fsprg.h"
-static int journal_file_object_verify(JournalFile *f, Object *o) {
+/* Use six characters to cover the offsets common in smallish journal
+ * files without adding to many zeros. */
+#define OFSfmt "%06"PRIx64
+
+static int journal_file_object_verify(JournalFile *f, uint64_t offset, Object *o) {
uint64_t i;
assert(f);
+ assert(offset);
assert(o);
/* This does various superficial tests about the length an
@@ -53,12 +58,21 @@ static int journal_file_object_verify(JournalFile *f, Object *o) {
case OBJECT_DATA: {
uint64_t h1, h2;
- if (le64toh(o->data.entry_offset) <= 0 ||
- le64toh(o->data.n_entries) <= 0)
+ if (le64toh(o->data.entry_offset) == 0)
+ log_warning(OFSfmt": unused data (entry_offset==0)", offset);
+
+ if ((le64toh(o->data.entry_offset) == 0) ^ (le64toh(o->data.n_entries) == 0)) {
+ log_error(OFSfmt": bad n_entries: %"PRIu64, offset, o->data.n_entries);
return -EBADMSG;
+ }
- if (le64toh(o->object.size) - offsetof(DataObject, payload) <= 0)
+ if (le64toh(o->object.size) - offsetof(DataObject, payload) <= 0) {
+ log_error(OFSfmt": bad object size (<= %"PRIu64"): %"PRIu64,
+ offset,
+ offsetof(DataObject, payload),
+ le64toh(o->object.size));
return -EBADMSG;
+ }
h1 = le64toh(o->data.hash);
@@ -69,104 +83,197 @@ static int journal_file_object_verify(JournalFile *f, Object *o) {
if (!uncompress_blob(o->data.payload,
le64toh(o->object.size) - offsetof(Object, data.payload),
- &b, &alloc, &b_size, 0))
+ &b, &alloc, &b_size, 0)) {
+ log_error(OFSfmt": uncompression failed", offset);
return -EBADMSG;
+ }
h2 = hash64(b, b_size);
free(b);
#else
+ log_error("Compression is not supported");
return -EPROTONOSUPPORT;
#endif
} else
h2 = hash64(o->data.payload, le64toh(o->object.size) - offsetof(Object, data.payload));
- if (h1 != h2)
+ if (h1 != h2) {
+ log_error(OFSfmt": invalid hash (%08"PRIx64" vs. %08"PRIx64, offset, h1, h2);
return -EBADMSG;
+ }
if (!VALID64(o->data.next_hash_offset) ||
!VALID64(o->data.next_field_offset) ||
!VALID64(o->data.entry_offset) ||
- !VALID64(o->data.entry_array_offset))
+ !VALID64(o->data.entry_array_offset)) {
+ log_error(OFSfmt": invalid offset (next_hash_offset="OFSfmt", next_field_offset="OFSfmt", entry_offset="OFSfmt", entry_array_offset="OFSfmt,
+ offset,
+ o->data.next_hash_offset,
+ o->data.next_field_offset,
+ o->data.entry_offset,
+ o->data.entry_array_offset);
return -EBADMSG;
+ }
break;
}
case OBJECT_FIELD:
- if (le64toh(o->object.size) - offsetof(FieldObject, payload) <= 0)
+ if (le64toh(o->object.size) - offsetof(FieldObject, payload) <= 0) {
+ log_error(OFSfmt": bad field size (<= %"PRIu64"): %"PRIu64,
+ offset,
+ offsetof(FieldObject, payload),
+ le64toh(o->object.size));
return -EBADMSG;
+ }
if (!VALID64(o->field.next_hash_offset) ||
- !VALID64(o->field.head_data_offset))
+ !VALID64(o->field.head_data_offset)) {
+ log_error(OFSfmt": invalid offset (next_hash_offset="OFSfmt", head_data_offset="OFSfmt,
+ offset,
+ o->field.next_hash_offset,
+ o->field.head_data_offset);
return -EBADMSG;
+ }
break;
case OBJECT_ENTRY:
- if ((le64toh(o->object.size) - offsetof(EntryObject, items)) % sizeof(EntryItem) != 0)
+ if ((le64toh(o->object.size) - offsetof(EntryObject, items)) % sizeof(EntryItem) != 0) {
+ log_error(OFSfmt": bad entry size (<= %"PRIu64"): %"PRIu64,
+ offset,
+ offsetof(EntryObject, items),
+ le64toh(o->object.size));
return -EBADMSG;
+ }
- if ((le64toh(o->object.size) - offsetof(EntryObject, items)) / sizeof(EntryItem) <= 0)
+ if ((le64toh(o->object.size) - offsetof(EntryObject, items)) / sizeof(EntryItem) <= 0) {
+ log_error(OFSfmt": invalid number items in entry: %"PRIu64,
+ offset,
+ (le64toh(o->object.size) - offsetof(EntryObject, items)) / sizeof(EntryItem));
return -EBADMSG;
+ }
+
+ if (le64toh(o->entry.seqnum) <= 0) {
+ log_error(OFSfmt": invalid entry seqnum: %"PRIx64,
+ offset,
+ le64toh(o->entry.seqnum));
+ return -EBADMSG;
+ }
- if (le64toh(o->entry.seqnum) <= 0 ||
- !VALID_REALTIME(le64toh(o->entry.realtime)) ||
- !VALID_MONOTONIC(le64toh(o->entry.monotonic)))
+ if (!VALID_REALTIME(le64toh(o->entry.realtime))) {
+ log_error(OFSfmt": invalid entry realtime timestamp: %"PRIu64,
+ offset,
+ le64toh(o->entry.realtime));
return -EBADMSG;
+ }
+
+ if (!VALID_MONOTONIC(le64toh(o->entry.monotonic))) {
+ log_error(OFSfmt": invalid entry monotonic timestamp: %"PRIu64,
+ offset,
+ le64toh(o->entry.monotonic));
+ return -EBADMSG;
+ }
for (i = 0; i < journal_file_entry_n_items(o); i++) {
if (o->entry.items[i].object_offset == 0 ||
- !VALID64(o->entry.items[i].object_offset))
+ !VALID64(o->entry.items[i].object_offset)) {
+ log_error(OFSfmt": invalid entry item (%"PRIu64"/%"PRIu64" offset: "OFSfmt,
+ offset,
+ i, journal_file_entry_n_items(o),
+ o->entry.items[i].object_offset);
return -EBADMSG;
+ }
}
break;
case OBJECT_DATA_HASH_TABLE:
case OBJECT_FIELD_HASH_TABLE:
- if ((le64toh(o->object.size) - offsetof(HashTableObject, items)) % sizeof(HashItem) != 0)
- return -EBADMSG;
-
- if ((le64toh(o->object.size) - offsetof(HashTableObject, items)) / sizeof(HashItem) <= 0)
+ if ((le64toh(o->object.size) - offsetof(HashTableObject, items)) % sizeof(HashItem) != 0 ||
+ (le64toh(o->object.size) - offsetof(HashTableObject, items)) / sizeof(HashItem) <= 0) {
+ log_error(OFSfmt": invalid %s hash table size: %"PRIu64,
+ offset,
+ o->object.type == OBJECT_DATA_HASH_TABLE ? "data" : "field",
+ le64toh(o->object.size));
return -EBADMSG;
+ }
for (i = 0; i < journal_file_hash_table_n_items(o); i++) {
if (o->hash_table.items[i].head_hash_offset != 0 &&
- !VALID64(le64toh(o->hash_table.items[i].head_hash_offset)))
+ !VALID64(le64toh(o->hash_table.items[i].head_hash_offset))) {
+ log_error(OFSfmt": invalid %s hash table item (%"PRIu64"/%"PRIu64") head_hash_offset: "OFSfmt,
+ offset,
+ o->object.type == OBJECT_DATA_HASH_TABLE ? "data" : "field",
+ i, journal_file_hash_table_n_items(o),
+ le64toh(o->hash_table.items[i].head_hash_offset));
return -EBADMSG;
+ }
if (o->hash_table.items[i].tail_hash_offset != 0 &&
- !VALID64(le64toh(o->hash_table.items[i].tail_hash_offset)))
+ !VALID64(le64toh(o->hash_table.items[i].tail_hash_offset))) {
+ log_error(OFSfmt": invalid %s hash table item (%"PRIu64"/%"PRIu64") tail_hash_offset: "OFSfmt,
+ offset,
+ o->object.type == OBJECT_DATA_HASH_TABLE ? "data" : "field",
+ i, journal_file_hash_table_n_items(o),
+ le64toh(o->hash_table.items[i].tail_hash_offset));
return -EBADMSG;
+ }
if ((o->hash_table.items[i].head_hash_offset != 0) !=
- (o->hash_table.items[i].tail_hash_offset != 0))
+ (o->hash_table.items[i].tail_hash_offset != 0)) {
+ log_error(OFSfmt": invalid %s hash table item (%"PRIu64"/%"PRIu64"): head_hash_offset="OFSfmt" tail_hash_offset="OFSfmt,
+ offset,
+ o->object.type == OBJECT_DATA_HASH_TABLE ? "data" : "field",
+ i, journal_file_hash_table_n_items(o),
+ le64toh(o->hash_table.items[i].head_hash_offset),
+ le64toh(o->hash_table.items[i].tail_hash_offset));
return -EBADMSG;
+ }
}
break;
case OBJECT_ENTRY_ARRAY:
- if ((le64toh(o->object.size) - offsetof(EntryArrayObject, items)) % sizeof(le64_t) != 0)
- return -EBADMSG;
-
- if ((le64toh(o->object.size) - offsetof(EntryArrayObject, items)) / sizeof(le64_t) <= 0)
+ if ((le64toh(o->object.size) - offsetof(EntryArrayObject, items)) % sizeof(le64_t) != 0 ||
+ (le64toh(o->object.size) - offsetof(EntryArrayObject, items)) / sizeof(le64_t) <= 0) {
+ log_error(OFSfmt": invalid object entry array size: %"PRIu64,
+ offset,
+ le64toh(o->object.size));
return -EBADMSG;
+ }
- if (!VALID64(o->entry_array.next_entry_array_offset))
+ if (!VALID64(o->entry_array.next_entry_array_offset)) {
+ log_error(OFSfmt": invalid object entry array next_entry_array_offset: "OFSfmt,
+ offset,
+ o->entry_array.next_entry_array_offset);
return -EBADMSG;
+ }
for (i = 0; i < journal_file_entry_array_n_items(o); i++)
if (o->entry_array.items[i] != 0 &&
- !VALID64(o->entry_array.items[i]))
+ !VALID64(o->entry_array.items[i])) {
+ log_error(OFSfmt": invalid object entry array item (%"PRIu64"/%"PRIu64"): "OFSfmt,
+ offset,
+ i, journal_file_entry_array_n_items(o),
+ o->entry_array.items[i]);
return -EBADMSG;
+ }
break;
case OBJECT_TAG:
- if (le64toh(o->object.size) != sizeof(TagObject))
+ if (le64toh(o->object.size) != sizeof(TagObject)) {
+ log_error(OFSfmt": invalid object tag size: %"PRIu64,
+ offset,
+ le64toh(o->object.size));
return -EBADMSG;
+ }
- if (!VALID_EPOCH(o->tag.epoch))
+ if (!VALID_EPOCH(o->tag.epoch)) {
+ log_error(OFSfmt": invalid object tag epoch: %"PRIu64,
+ offset,
+ o->tag.epoch);
return -EBADMSG;
+ }
break;
}
@@ -375,8 +482,18 @@ static int verify_data(
n = le64toh(o->data.n_entries);
a = le64toh(o->data.entry_array_offset);
- /* We already checked this earlier */
- assert(n > 0);
+ /* Entry array means at least two objects */
+ if (a && n < 2) {
+ log_error("Entry array present (entry_array_offset=%"PRIu64", but n_entries=%"PRIu64,
+ a, n);
+ return -EBADMSG;
+ }
+
+ if (n == 0)
+ return 0;
+
+ /* We already checked that earlier */
+ assert(o->data.entry_offset);
last = q = le64toh(o->data.entry_offset);
r = entry_points_to_data(f, entry_fd, n_entries, q, p);
@@ -747,7 +864,7 @@ int journal_file_verify(
r = journal_file_move_to_object(f, -1, p, &o);
if (r < 0) {
- log_error("Invalid object at %"PRIu64, p);
+ log_error("Invalid object at "OFSfmt, p);
goto fail;
}
@@ -762,14 +879,14 @@ int journal_file_verify(
n_objects ++;
- r = journal_file_object_verify(f, o);
+ r = journal_file_object_verify(f, p, o);
if (r < 0) {
- log_error("Invalid object contents at %"PRIu64, p);
+ log_error("Invalid object contents at "OFSfmt": %s", p, strerror(-r));
goto fail;
}
if ((o->object.flags & OBJECT_COMPRESSED) && !JOURNAL_HEADER_COMPRESSED(f->header)) {
- log_error("Compressed object in file without compression at %"PRIu64, p);
+ log_error("Compressed object in file without compression at "OFSfmt, p);
r = -EBADMSG;
goto fail;
}
@@ -790,7 +907,7 @@ int journal_file_verify(
case OBJECT_ENTRY:
if (JOURNAL_HEADER_SEALED(f->header) && n_tags <= 0) {
- log_error("First entry before first tag at %"PRIu64, p);
+ log_error("First entry before first tag at "OFSfmt, p);
r = -EBADMSG;
goto fail;
}
@@ -800,21 +917,21 @@ int journal_file_verify(
goto fail;
if (le64toh(o->entry.realtime) < last_tag_realtime) {
- log_error("Older entry after newer tag at %"PRIu64, p);
+ log_error("Older entry after newer tag at "OFSfmt, p);
r = -EBADMSG;
goto fail;
}
if (!entry_seqnum_set &&
le64toh(o->entry.seqnum) != le64toh(f->header->head_entry_seqnum)) {
- log_error("Head entry sequence number incorrect at %"PRIu64, p);
+ log_error("Head entry sequence number incorrect at "OFSfmt, p);
r = -EBADMSG;
goto fail;
}
if (entry_seqnum_set &&
entry_seqnum >= le64toh(o->entry.seqnum)) {
- log_error("Entry sequence number out of synchronization at %"PRIu64, p);
+ log_error("Entry sequence number out of synchronization at "OFSfmt, p);
r = -EBADMSG;
goto fail;
}
@@ -825,7 +942,7 @@ int journal_file_verify(
if (entry_monotonic_set &&
sd_id128_equal(entry_boot_id, o->entry.boot_id) &&
entry_monotonic > le64toh(o->entry.monotonic)) {
- log_error("Entry timestamp out of synchronization at %"PRIu64, p);
+ log_error("Entry timestamp out of synchronization at "OFSfmt, p);
r = -EBADMSG;
goto fail;
}
@@ -849,7 +966,7 @@ int journal_file_verify(
case OBJECT_DATA_HASH_TABLE:
if (n_data_hash_tables > 1) {
- log_error("More than one data hash table at %"PRIu64, p);
+ log_error("More than one data hash table at "OFSfmt, p);
r = -EBADMSG;
goto fail;
}
@@ -866,7 +983,7 @@ int journal_file_verify(
case OBJECT_FIELD_HASH_TABLE:
if (n_field_hash_tables > 1) {
- log_error("More than one field hash table at %"PRIu64, p);
+ log_error("More than one field hash table at "OFSfmt, p);
r = -EBADMSG;
goto fail;
}
@@ -888,7 +1005,7 @@ int journal_file_verify(
if (p == le64toh(f->header->entry_array_offset)) {
if (found_main_entry_array) {
- log_error("More than one main entry array at %"PRIu64, p);
+ log_error("More than one main entry array at "OFSfmt, p);
r = -EBADMSG;
goto fail;
}
@@ -901,19 +1018,19 @@ int journal_file_verify(
case OBJECT_TAG:
if (!JOURNAL_HEADER_SEALED(f->header)) {
- log_error("Tag object in file without sealing at %"PRIu64, p);
+ log_error("Tag object in file without sealing at "OFSfmt, p);
r = -EBADMSG;
goto fail;
}
if (le64toh(o->tag.seqnum) != n_tags + 1) {
- log_error("Tag sequence number out of synchronization at %"PRIu64, p);
+ log_error("Tag sequence number out of synchronization at "OFSfmt, p);
r = -EBADMSG;
goto fail;
}
if (le64toh(o->tag.epoch) < last_epoch) {
- log_error("Epoch sequence out of synchronization at %"PRIu64, p);
+ log_error("Epoch sequence out of synchronization at "OFSfmt, p);
r = -EBADMSG;
goto fail;
}
@@ -926,7 +1043,7 @@ int journal_file_verify(
rt = f->fss_start_usec + o->tag.epoch * f->fss_interval_usec;
if (entry_realtime_set && entry_realtime >= rt + f->fss_interval_usec) {
- log_error("Tag/entry realtime timestamp out of synchronization at %"PRIu64, p);
+ log_error("Tag/entry realtime timestamp out of synchronization at "OFSfmt, p);
r = -EBADMSG;
goto fail;
}
@@ -969,7 +1086,7 @@ int journal_file_verify(
goto fail;
if (memcmp(o->tag.tag, gcry_md_read(f->hmac, 0), TAG_LENGTH) != 0) {
- log_error("Tag failed verification at %"PRIu64, p);
+ log_error("Tag failed verification at "OFSfmt, p);
r = -EBADMSG;
goto fail;
}
@@ -1132,7 +1249,7 @@ fail:
if (show_progress)
flush_progress();
- log_error("File corruption detected at %s:%"PRIu64" (of %llu bytes, %"PRIu64"%%).",
+ log_error("File corruption detected at %s:"OFSfmt" (of %llu bytes, %"PRIu64"%%).",
f->path,
p,
(unsigned long long) f->last_stat.st_size,
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-25 07:01:45 +0000