| From ef4d6abe7c7fab6cbff975b32e76b09feee56074 Mon Sep 17 00:00:00 2001 |
| From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl> |
| Date: Fri, 7 Dec 2018 10:48:10 +0100 |
| Subject: [PATCH] journal-remote: set a limit on the number of fields in a |
| message |
| |
| Existing use of E2BIG is replaced with ENOBUFS (entry too long), and E2BIG is |
| reused for the new error condition (too many fields). |
| |
| This matches the change done for systemd-journald, hence forming the second |
| part of the fix for CVE-2018-16865 |
| (https://bugzilla.redhat.com/show_bug.cgi?id=1653861). |
| |
| [james.hilliard1@gmail.com: backport from upstream commit |
| ef4d6abe7c7fab6cbff975b32e76b09feee56074] |
| Signed-off-by: James Hilliard <james.hilliard1@gmail.com> |
| --- |
| src/journal-remote/journal-remote-main.c | 7 +++++-- |
| src/journal-remote/journal-remote.c | 3 +++ |
| src/shared/journal-importer.c | 5 ++++- |
| 3 files changed, 12 insertions(+), 3 deletions(-) |
| |
| diff --git a/src/journal-remote/journal-remote-main.c b/src/journal-remote/journal-remote-main.c |
| index 8543dba..802c3ea 100644 |
| --- a/src/journal-remote/journal-remote-main.c |
| +++ b/src/journal-remote/journal-remote-main.c |
| @@ -222,9 +222,12 @@ static int process_http_upload( |
| if (r == -EAGAIN) |
| break; |
| if (r < 0) { |
| - if (r == -E2BIG) |
| - log_warning_errno(r, "Entry is too above maximum of %u, aborting connection %p.", |
| + if (r == -ENOBUFS) |
| + log_warning_errno(r, "Entry is above the maximum of %u, aborting connection %p.", |
| DATA_SIZE_MAX, connection); |
| + else if (r == -E2BIG) |
| + log_warning_errno(r, "Entry with more fields than the maximum of %u, aborting connection %p.", |
| + ENTRY_FIELD_COUNT_MAX, connection); |
| else |
| log_warning_errno(r, "Failed to process data, aborting connection %p: %m", |
| connection); |
| diff --git a/src/journal-remote/journal-remote.c b/src/journal-remote/journal-remote.c |
| index 3c0916c..1da32c5 100644 |
| --- a/src/journal-remote/journal-remote.c |
| +++ b/src/journal-remote/journal-remote.c |
| @@ -407,6 +407,9 @@ int journal_remote_handle_raw_source( |
| log_debug("%zu active sources remaining", s->active); |
| return 0; |
| } else if (r == -E2BIG) { |
| + log_notice("Entry with too many fields, skipped"); |
| + return 1; |
| + } else if (r == -ENOBUFS) { |
| log_notice("Entry too big, skipped"); |
| return 1; |
| } else if (r == -EAGAIN) { |
| diff --git a/src/shared/journal-importer.c b/src/shared/journal-importer.c |
| index b0e6192..8638cd3 100644 |
| --- a/src/shared/journal-importer.c |
| +++ b/src/shared/journal-importer.c |
| @@ -23,6 +23,9 @@ enum { |
| }; |
| |
| static int iovw_put(struct iovec_wrapper *iovw, void* data, size_t len) { |
| + if (iovw->count >= ENTRY_FIELD_COUNT_MAX) |
| + return -E2BIG; |
| + |
| if (!GREEDY_REALLOC(iovw->iovec, iovw->size_bytes, iovw->count + 1)) |
| return log_oom(); |
| |
| @@ -97,7 +100,7 @@ static int get_line(JournalImporter *imp, char **line, size_t *size) { |
| |
| imp->scanned = imp->filled; |
| if (imp->scanned >= DATA_SIZE_MAX) |
| - return log_error_errno(SYNTHETIC_ERRNO(E2BIG), |
| + return log_error_errno(SYNTHETIC_ERRNO(ENOBUFS), |
| "Entry is bigger than %u bytes.", |
| DATA_SIZE_MAX); |
| |
| -- |
| 2.7.4 |
| |