diff options
Diffstat (limited to 'meta/recipes-support/curl/curl/CVE-2023-28320.patch')
-rw-r--r-- | meta/recipes-support/curl/curl/CVE-2023-28320.patch | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/meta/recipes-support/curl/curl/CVE-2023-28320.patch b/meta/recipes-support/curl/curl/CVE-2023-28320.patch new file mode 100644 index 0000000000..0c9b67440a --- /dev/null +++ b/meta/recipes-support/curl/curl/CVE-2023-28320.patch @@ -0,0 +1,86 @@ +From 13718030ad4b3209a7583b4f27f683cd3a6fa5f2 Mon Sep 17 00:00:00 2001 +From: Harry Sintonen <sintonen@iki.fi> +Date: Tue, 25 Apr 2023 09:22:26 +0200 +Subject: [PATCH] hostip: add locks around use of global buffer for alarm() + +When building with the sync name resolver and timeout ability we now +require thread-safety to be present to enable it. + +Closes #11030 + +Upstream-Status: Backport [https://github.com/curl/curl/commit/13718030ad4b3209a7583b4f27f683cd3a6fa5f2] +CVE: CVE-2023-28320 +Signed-off-by: Vivek Kumbhar <vkumbhar@mvista.com> +--- + lib/hostip.c | 19 +++++++++++++++---- + 1 file changed, 15 insertions(+), 4 deletions(-) + +diff --git a/lib/hostip.c b/lib/hostip.c +index f5bb634..5231a74 100644 +--- a/lib/hostip.c ++++ b/lib/hostip.c +@@ -68,12 +68,19 @@ + #include "curl_memory.h" + #include "memdebug.h" + +-#if defined(CURLRES_SYNCH) && \ +- defined(HAVE_ALARM) && defined(SIGALRM) && defined(HAVE_SIGSETJMP) ++#if defined(CURLRES_SYNCH) && \ ++ defined(HAVE_ALARM) && \ ++ defined(SIGALRM) && \ ++ defined(HAVE_SIGSETJMP) && \ ++ defined(GLOBAL_INIT_IS_THREADSAFE) + /* alarm-based timeouts can only be used with all the dependencies satisfied */ + #define USE_ALARM_TIMEOUT + #endif + ++#ifdef USE_ALARM_TIMEOUT ++#include "easy_lock.h" ++#endif ++ + #define MAX_HOSTCACHE_LEN (255 + 7) /* max FQDN + colon + port number + zero */ + + /* +@@ -248,11 +255,12 @@ void Curl_hostcache_prune(struct Curl_easy *data) + Curl_share_unlock(data, CURL_LOCK_DATA_DNS); + } + +-#ifdef HAVE_SIGSETJMP ++#ifdef USE_ALARM_TIMEOUT + /* Beware this is a global and unique instance. This is used to store the + return address that we can jump back to from inside a signal handler. This + is not thread-safe stuff. */ + sigjmp_buf curl_jmpenv; ++curl_simple_lock curl_jmpenv_lock; + #endif + + /* lookup address, returns entry if found and not stale */ +@@ -614,7 +622,6 @@ enum resolve_t Curl_resolv(struct connectdata *conn, + static + RETSIGTYPE alarmfunc(int sig) + { +- /* this is for "-ansi -Wall -pedantic" to stop complaining! (rabe) */ + (void)sig; + siglongjmp(curl_jmpenv, 1); + } +@@ -695,6 +702,8 @@ enum resolve_t Curl_resolv_timeout(struct connectdata *conn, + This should be the last thing we do before calling Curl_resolv(), + as otherwise we'd have to worry about variables that get modified + before we invoke Curl_resolv() (and thus use "volatile"). */ ++ curl_simple_lock_lock(&curl_jmpenv_lock); ++ + if(sigsetjmp(curl_jmpenv, 1)) { + /* this is coming from a siglongjmp() after an alarm signal */ + failf(data, "name lookup timed out"); +@@ -763,6 +772,8 @@ clean_up: + #endif + #endif /* HAVE_SIGACTION */ + ++ curl_simple_lock_unlock(&curl_jmpenv_lock); ++ + /* switch back the alarm() to either zero or to what it was before minus + the time we spent until now! */ + if(prev_alarm) { +-- +2.25.1 + |