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Add SUDO_EV_MASK to mask off invalid event values.

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Now used by sudo_ev_init() to avoid bogus events.
This commit is contained in:
Todd C. Miller
2020-03-12 14:00:15 -06:00
parent a23048bbb2
commit d83c09fb66
2 changed files with 5 additions and 3 deletions
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3
include/sudo_event.h
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@@ -33,6 +33,9 @@ struct timeval; /* for deprecated APIs */
#define SUDO_EV_SIGNAL 0x10 /* fire on signal receipt */
#define SUDO_EV_SIGINFO 0x20 /* fire on signal receipt (siginfo) */
/* User-settable events for sudo_ev_init() (SUDO_EV_TIMEOUT not valid here) */
#define SUDO_EV_MASK (SUDO_EV_READ|SUDO_EV_WRITE|SUDO_EV_PERSIST|SUDO_EV_SIGNAL|SUDO_EV_SIGINFO)
/* Event flags (internal) */
#define SUDO_EVQ_INSERTED 0x01 /* event is on the event queue */
#define SUDO_EVQ_ACTIVE 0x02 /* event is on the active queue */

5
lib/util/event.c
View File

@@ -273,10 +273,9 @@ sudo_ev_init(struct sudo_event *ev, int fd, short events,
{
debug_decl(sudo_ev_init, SUDO_DEBUG_EVENT);
/* XXX - sanity check events value */
memset(ev, 0, sizeof(*ev));
ev->fd = fd;
ev->events = events;
ev->events = events & SUDO_EV_MASK;
ev->pfd_idx = -1;
ev->callback = callback;
ev->closure = closure;
@@ -842,7 +841,7 @@ sudo_ev_get_timeleft_v2(struct sudo_event *ev, struct timespec *ts)
int
sudo_ev_pending_v1(struct sudo_event *ev, short events, struct timespec *ts)
{
int ret = 0;
int ret;
debug_decl(sudo_ev_pending, SUDO_DEBUG_EVENT);
sudo_debug_printf(SUDO_DEBUG_INFO, "%s: event %p, flags 0x%x, events 0x%x",