Gitweb:
https://git.exim.org/exim.git/commitdiff/1f1633046e3e3828c11f23a72b03fd03e20fd6e8
Commit: 1f1633046e3e3828c11f23a72b03fd03e20fd6e8
Parent: 1f7081b85e684302c091d8b35226ba3418c03f2b
Author: Jeremy Harris <jgh146exb@???>
AuthorDate: Sun May 16 15:37:18 2021 +0100
Committer: Jeremy Harris <jgh146exb@???>
CommitDate: Mon Jun 28 00:30:02 2021 +0100
paniclog sigsegv events
---
src/src/exim.c | 22 ++++++++++++++++++----
1 file changed, 18 insertions(+), 4 deletions(-)
diff --git a/src/src/exim.c b/src/src/exim.c
index eb1d834..a42c48b 100644
--- a/src/src/exim.c
+++ b/src/src/exim.c
@@ -211,6 +211,19 @@ exit(1);
}
+/***********************************************
+* Handler for SIGSEGV *
+***********************************************/
+
+static void
+segv_handler(int sig)
+{
+log_write(0, LOG_MAIN|LOG_PANIC, "SIGSEGV (maybe attempt to write to immutable memory)");
+signal(SIGSEGV, SIG_DFL);
+kill(getpid(), sig);
+}
+
+
/*************************************************
* Handler for SIGUSR1 *
*************************************************/
@@ -1805,7 +1818,8 @@ descriptive text. */
process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
set_process_info("initializing");
-os_restarting_signal(SIGUSR1, usr1_handler);
+os_restarting_signal(SIGUSR1, usr1_handler); /* exiwhat */
+signal(SIGSEGV, segv_handler); /* log faults */
/* If running in a dockerized environment, the TERM signal is only
delegated to the PID 1 if we request it by setting an signal handler */
@@ -5464,15 +5478,15 @@ that SIG_IGN works. */
if (!f.synchronous_delivery)
{
- #ifdef SA_NOCLDWAIT
+#ifdef SA_NOCLDWAIT
struct sigaction act;
act.sa_handler = SIG_IGN;
sigemptyset(&(act.sa_mask));
act.sa_flags = SA_NOCLDWAIT;
sigaction(SIGCHLD, &act, NULL);
- #else
+#else
signal(SIGCHLD, SIG_IGN);
- #endif
+#endif
}
/* Save the current store pool point, for resetting at the start of
