diff options
Diffstat (limited to 'meta/recipes-connectivity/connman/connman/0003-stats-Fix-bad-file-descriptor-initialisation.patch')
| -rw-r--r-- | meta/recipes-connectivity/connman/connman/0003-stats-Fix-bad-file-descriptor-initialisation.patch | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/meta/recipes-connectivity/connman/connman/0003-stats-Fix-bad-file-descriptor-initialisation.patch b/meta/recipes-connectivity/connman/connman/0003-stats-Fix-bad-file-descriptor-initialisation.patch new file mode 100644 index 0000000000..c545811ee1 --- /dev/null +++ b/meta/recipes-connectivity/connman/connman/0003-stats-Fix-bad-file-descriptor-initialisation.patch @@ -0,0 +1,102 @@ +From c7f4151fb053b0d0691d8f10d7e3690265d28889 Mon Sep 17 00:00:00 2001 +From: Lukasz Nowak <lnowak@tycoint.com> +Date: Wed, 26 Oct 2016 18:13:02 +0100 +Subject: [PATCH] stats: Fix bad file descriptor initialisation + +Stats file code initialises its file descriptor field to 0. But 0 is +a valid fd value. -1 should be used instead. This causes problems +when an error happens before a stats file is open (e.g. mkdir +fails). The clean-up procedure, stats_free() calls close(fd). When fd +is 0, this first closes stdin, and then any files/sockets which +received fd=0, re-used by the OS. + +Fixed several instances of bad file descriptor field handling, in case +of errors. + +The bug results with connman freezing if there is no read/write storage +directory available, and there are multiple active interfaces +(fd=0 gets re-used for sockets in that case). + +The patch was imported from the Connman git repository +(git://git.kernel.org/pub/scm/network/connman) as of commit id +c7f4151fb053b0d0691d8f10d7e3690265d28889. + +Upstream-Status: Accepted +Signed-off-by: Lukasz Nowak <lnowak@tycoint.com> +--- + src/stats.c | 15 +++++++++++++++ + src/util.c | 4 ++-- + 2 files changed, 17 insertions(+), 2 deletions(-) + +diff --git a/src/stats.c b/src/stats.c +index 26343b1..c3ca738 100644 +--- a/src/stats.c ++++ b/src/stats.c +@@ -378,6 +378,7 @@ static int stats_file_setup(struct stats_file *file) + strerror(errno), file->name); + + TFR(close(file->fd)); ++ file->fd = -1; + g_free(file->name); + file->name = NULL; + +@@ -393,6 +394,7 @@ static int stats_file_setup(struct stats_file *file) + err = stats_file_remap(file, size); + if (err < 0) { + TFR(close(file->fd)); ++ file->fd = -1; + g_free(file->name); + file->name = NULL; + +@@ -649,6 +651,13 @@ static int stats_file_history_update(struct stats_file *data_file) + bzero(history_file, sizeof(struct stats_file)); + bzero(temp_file, sizeof(struct stats_file)); + ++ /* ++ * 0 is a valid file descriptor - fd needs to be initialized ++ * to -1 to handle errors correctly ++ */ ++ history_file->fd = -1; ++ temp_file->fd = -1; ++ + err = stats_open(history_file, data_file->history_name); + if (err < 0) + return err; +@@ -682,6 +691,12 @@ int __connman_stats_service_register(struct connman_service *service) + if (!file) + return -ENOMEM; + ++ /* ++ * 0 is a valid file descriptor - fd needs to be initialized ++ * to -1 to handle errors correctly ++ */ ++ file->fd = -1; ++ + g_hash_table_insert(stats_hash, service, file); + } else { + return -EALREADY; +diff --git a/src/util.c b/src/util.c +index e6532c8..732d451 100644 +--- a/src/util.c ++++ b/src/util.c +@@ -63,7 +63,7 @@ int __connman_util_init(void) + { + int r = 0; + +- if (f > 0) ++ if (f >= 0) + return 0; + + f = open(URANDOM, O_RDONLY); +@@ -86,7 +86,7 @@ int __connman_util_init(void) + + void __connman_util_cleanup(void) + { +- if (f > 0) ++ if (f >= 0) + close(f); + + f = -1; +-- +2.7.4 + |