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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 <david.henningsson@canonical.com>
This commit is contained in:
David Henningsson 2012-04-17 12:33:21 +02:00 committed by Nedko Arnaudov
parent 85b14bd45d
commit f82ec71566
1 changed files with 7 additions and 1 deletions
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8
dbus/sigsegv.c
View File

@ -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++)