File 0001-core-make-unit-deserialization-more-defens... of Package systemd

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File 0001-core-make-unit-deserialization-more-defensive.patch of Package systemd (Revision 520dbb589aa65b327124afb794f84479)

Currently displaying revision 520dbb589aa65b327124afb794f84479 , Show latest

From e911de996a72af7659e4019f03b80f11c476f3f3 Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Tue, 21 Apr 2015 20:22:51 +0200
Subject: [PATCH] core: make unit deserialization more defensive

---
 src/core/unit.c        |   59 ++++++++++++++++++++++++++++++++++++++-----------
 src/shared/time-util.c |   15 +++++++-----
 src/shared/time-util.h |    2 -
 3 files changed, 56 insertions(+), 20 deletions(-)

--- src/core/unit.c
+++ src/core/unit.c	2015-06-17 09:51:14.637518042 +0000
@@ -2352,6 +2352,40 @@ void unit_serialize_item(Unit *u, FILE *
         fprintf(f, "%s=%s\n", key, value);
 }
 
+static int unit_set_cgroup_path(Unit *u, const char *path) {
+        _cleanup_free_ char *p = NULL;
+        int r;
+
+        assert(u);
+
+        if (path) {
+                p = strdup(path);
+                if (!p)
+                        return -ENOMEM;
+        } else
+                p = NULL;
+
+        if (streq_ptr(u->cgroup_path, p))
+                return 0;
+
+        if (p) {
+                r = hashmap_put(u->manager->cgroup_unit, p, u);
+                if (r < 0)
+                        return r;
+        }
+
+        if (u->cgroup_path) {
+                log_debug_unit(u->id, "%s: Changing cgroup path from %s to %s.", u->id, u->cgroup_path, strna(p));
+                hashmap_remove(u->manager->cgroup_unit, u->cgroup_path);
+                free(u->cgroup_path);
+        }
+
+        u->cgroup_path = p;
+        p = NULL;
+
+        return 0;
+}
+
 int unit_deserialize(Unit *u, FILE *f, FDSet *fds) {
         ExecRuntime **rt = NULL;
         size_t offset;
@@ -2379,7 +2413,7 @@ int unit_deserialize(Unit *u, FILE *f, F
                 l = strstrip(line);
 
                 /* End marker */
-                if (l[0] == 0)
+                if (isempty(l))
                         return 0;
 
                 k = strcspn(l, "=");
@@ -2395,7 +2429,7 @@ int unit_deserialize(Unit *u, FILE *f, F
                                 /* new-style serialized job */
                                 Job *j = job_new_raw(u);
                                 if (!j)
-                                        return -ENOMEM;
+                                        return log_oom();
 
                                 r = job_deserialize(j, f, fds);
                                 if (r < 0) {
@@ -2464,16 +2498,11 @@ int unit_deserialize(Unit *u, FILE *f, F
 
                         continue;
                 } else if (streq(l, "cgroup")) {
-                        char *s;
-
-                        s = strdup(v);
-                        if (!s)
-                                return -ENOMEM;
 
-                        free(u->cgroup_path);
-                        u->cgroup_path = s;
+                        r = unit_set_cgroup_path(u, v);
+                        if (r < 0)
+                                log_debug("Failed to set cgroup path %s: %s", v, strerror(-r));
 
-                        assert(hashmap_put(u->manager->cgroup_unit, s, u) == 1);
                         continue;
                 } else if (streq(l, "cgroup-realized")) {
                         int b;
@@ -2490,15 +2519,19 @@ int unit_deserialize(Unit *u, FILE *f, F
                 if (unit_can_serialize(u)) {
                         if (rt) {
                                 r = exec_runtime_deserialize_item(rt, u, l, v, fds);
-                                if (r < 0)
-                                        return r;
+                                if (r < 0) {
+                                        log_warning_unit(u->id, "Failed to deserialize runtime parameter '%s', ignoring.", l);
+                                        continue;
+                                }
+
+                                /* Returns positive if key was handled by the call */
                                 if (r > 0)
                                         continue;
                         }
 
                         r = UNIT_VTABLE(u)->deserialize_item(u, l, v, fds);
                         if (r < 0)
-                                return r;
+                                log_warning_unit(u->id, "Failed to deserialize unit parameter '%s', ignoring.", l);
                 }
         }
 }
--- src/shared/time-util.c
+++ src/shared/time-util.c	2015-06-17 00:00:00.000000000 +0000
@@ -375,18 +375,21 @@ void dual_timestamp_serialize(FILE *f, c
                 (unsigned long long) t->monotonic);
 }
 
-void dual_timestamp_deserialize(const char *value, dual_timestamp *t) {
+int dual_timestamp_deserialize(const char *value, dual_timestamp *t) {
         unsigned long long a, b;
 
         assert(value);
         assert(t);
 
-        if (sscanf(value, "%llu %llu", &a, &b) != 2)
-                log_debug("Failed to parse finish timestamp value %s", value);
-        else {
-                t->realtime = a;
-                t->monotonic = b;
+        if (sscanf(value, "%llu %llu", &a, &b) != 2) {
+                log_debug("Failed to parse finish timestamp value %s.", value);
+                return -EINVAL;
         }
+
+        t->realtime = a;
+        t->monotonic = b;
+
+        return 0;
 }
 
 int parse_timestamp(const char *t, usec_t *usec) {
--- src/shared/time-util.h
+++ src/shared/time-util.h	2015-06-17 00:00:00.000000000 +0000
@@ -86,7 +86,7 @@ char *format_timestamp_relative(char *bu
 char *format_timespan(char *buf, size_t l, usec_t t, usec_t accuracy);
 
 void dual_timestamp_serialize(FILE *f, const char *name, dual_timestamp *t);
-void dual_timestamp_deserialize(const char *value, dual_timestamp *t);
+int dual_timestamp_deserialize(const char *value, dual_timestamp *t);
 
 int parse_timestamp(const char *t, usec_t *usec);

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File 0001-core-make-unit-deserialization-more-defensive.patch of Package systemd (Revision 520dbb589aa65b327124afb794f84479)

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