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| author | Rich Felker <dalias@aerifal.cx> | 2011-03-10 11:59:39 -0500 |
|---|---|---|
| committer | Rich Felker <dalias@aerifal.cx> | 2011-03-10 11:59:39 -0500 |
| commit | 52213f734134055968ef14bf54b71f0dd370763a (patch) | |
| tree | 9931baeaa337476b11d2ec48be75b7852a0c80b8 /src/thread/pthread_create.c | |
| parent | 11dbbe9fbac33ede053803ebf7193550ec5cfb48 (diff) | |
| download | musl-52213f734134055968ef14bf54b71f0dd370763a.tar.gz musl-52213f734134055968ef14bf54b71f0dd370763a.tar.xz musl-52213f734134055968ef14bf54b71f0dd370763a.zip | |
security fix: check that cancel/rsyscall signal was sent by the process itself
Diffstat (limited to 'src/thread/pthread_create.c')
| -rw-r--r-- | src/thread/pthread_create.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/thread/pthread_create.c b/src/thread/pthread_create.c index 2098e752..9c24b844 100644 --- a/src/thread/pthread_create.c +++ b/src/thread/pthread_create.c @@ -45,6 +45,7 @@ static void docancel(struct pthread *self) static void cancel_handler(int sig, siginfo_t *si, void *ctx) { struct pthread *self = __pthread_self(); + if (si->si_code > 0 || si->si_pid != self->pid) return; self->cancel = 1; if (self->canceldisable || (!self->cancelasync && !self->cancelpoint)) return; @@ -75,6 +76,8 @@ static struct { static void rsyscall_handler(int sig, siginfo_t *si, void *ctx) { + if (si->si_code > 0 || si->si_pid != __pthread_self()->pid) return; + if (rs.cnt == libc.threads_minus_1) return; if (syscall6(rs.nr, rs.arg[0], rs.arg[1], rs.arg[2], |