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From e7a90c1117e4d37be191a6567b405d7908a30434 Mon Sep 17 00:00:00 2001
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From: Martin Pitt <martin.pitt@ubuntu.com>
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Date: Wed, 22 Apr 2015 23:09:43 +0100
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Subject: [PATCH] util: Fix assertion in split() on missing '
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When parsing a unit with a trailing slash after an escaped line break, like
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ExecStart=/bin/echo 'foo \
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bar'
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the split() function (through config_parse()) asserted and crashed pid 1:
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Assertion 'current[*l + 1] == quotechars[0]' failed at ../src/shared/util.c:583, function split(). Aborting.
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Fix this by returning an error in this case ("trailing garbage").
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Add corresponding test case. Also fix the missing "unit" argument of
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config_parse_exec() in the comment.
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https://launchpad.net/bugs/1447243
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(cherry picked from commit 470dca63cd2b1579f45f72b6b9777494abeff105)
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---
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src/shared/util.c | 3 +--
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src/test/test-unit-file.c | 15 +++++++++++++++
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2 files changed, 16 insertions(+), 2 deletions(-)
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diff --git a/src/shared/util.c b/src/shared/util.c
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index 1e1bf944f2..649344d88f 100644
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--- a/src/shared/util.c
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+++ b/src/shared/util.c
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@@ -571,13 +571,12 @@ const char* split(const char **state, size_t *l, const char *separator, bool quo
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char quotechars[2] = {*current, '\0'};
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*l = strcspn_escaped(current + 1, quotechars);
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- if (current[*l + 1] == '\0' ||
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+ if (current[*l + 1] == '\0' || current[*l + 1] != quotechars[0] ||
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(current[*l + 2] && !strchr(separator, current[*l + 2]))) {
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/* right quote missing or garbage at the end */
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*state = current;
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return NULL;
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}
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- assert(current[*l + 1] == quotechars[0]);
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*state = current++ + *l + 2;
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} else if (quoted) {
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*l = strcspn_escaped(current, separator);
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diff --git a/src/test/test-unit-file.c b/src/test/test-unit-file.c
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index e517f571d6..9f3e3a227e 100644
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--- a/src/test/test-unit-file.c
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+++ b/src/test/test-unit-file.c
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@@ -92,6 +92,7 @@ static void check_execcommand(ExecCommand *c,
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static void test_config_parse_exec(void) {
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/* int config_parse_exec(
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+ const char *unit,
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const char *filename,
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unsigned line,
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const char *section,
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@@ -303,6 +304,20 @@ static void test_config_parse_exec(void) {
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assert_se(r == 0);
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assert_se(c1->command_next == NULL);
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+ log_info("/* missing ending ' */");
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+ r = config_parse_exec(NULL, "fake", 4, "section", 1,
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+ "LValue", 0, "/path 'foo",
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+ &c, NULL);
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+ assert_se(r == 0);
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+ assert_se(c1->command_next == NULL);
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+
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+ log_info("/* missing ending ' with trailing backslash */");
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+ r = config_parse_exec(NULL, "fake", 4, "section", 1,
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+ "LValue", 0, "/path 'foo\\",
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+ &c, NULL);
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+ assert_se(r == 0);
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+ assert_se(c1->command_next == NULL);
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+
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exec_command_free_list(c);
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}
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