[Jack-Devel] [PATCH] jackdbus: Fix sigsegv handling segfaulting by itself
In my case, the siginfo code was -6, causing the sigsegv handling
to crash on its own. This patch adds a range check for siginfo code.
BugLink: https://bugs.launchpad.net/bugs/983835
Signed-off-by: David Henningsson <[hidden]>
---
dbus/sigsegv.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/dbus/sigsegv.c b/dbus/sigsegv.c
index 03b1183..8a87dc8 100644
--- a/dbus/sigsegv.c
+++ b/dbus/sigsegv.c
@@ -60,6 +60,7 @@ static void signal_segv(int signum, siginfo_t* info, void*ptr) {
static const char *si_codes[3] = {"", "SEGV_MAPERR", "SEGV_ACCERR"};
size_t i;
+ const char *si_code_str;
ucontext_t *ucontext = (ucontext_t*)ptr;
#if defined(SIGSEGV_STACK_X86) || defined(SIGSEGV_STACK_IA64)
@@ -94,9 +95,14 @@ static void signal_segv(int signum, siginfo_t* info, void*ptr) {
jack_error("Unknown bad signal catched!");
}
+ if (info->si_code >= 0 && info->si_code < 3)
+ si_code_str = si_codes[info->si_code];
+ else
+ si_code_str = "unknown";
+
jack_error("info.si_signo = %d", signum);
jack_error("info.si_errno = %d", info->si_errno);
- jack_error("info.si_code = %d (%s)", info->si_code, si_codes[info->si_code]);
+ jack_error("info.si_code = %d (%s)", info->si_code, si_code_str);
jack_error("info.si_addr = %p", info->si_addr);
#if !defined(__alpha__) && !defined(__ia64__) && !defined(__FreeBSD_kernel__) && !defined(__arm__) && !defined(__hppa__) && !defined(__sh__)
for(i = 0; i < NGREG; i++)
--
1.7.9.5
1334658822.12328_0.ltw:2,a <1334658801-14312-1-git-send-email-david.henningsson at canonical dot com>