git: 7556b55f0d67 - main - time: Handle kern_clock_gettime() failures in kern_clock_nanosleep()

The branch main has been updated by markj:

URL: https://cgit.FreeBSD.org/src/commit/?id=7556b55f0d67b7fc353ca509dee120dac18fc061

commit 7556b55f0d67b7fc353ca509dee120dac18fc061
Author:     Mark Johnston <markj@FreeBSD.org>
AuthorDate: 2025-08-05 16:15:16 +0000
Commit:     Mark Johnston <markj@FreeBSD.org>
CommitDate: 2025-08-06 21:24:36 +0000

    time: Handle kern_clock_gettime() failures in kern_clock_nanosleep()
    
    kern_clock_gettime(CLOCK_TAI) can fail with EINVAL.
    
    Reported by:    syzbot+e17e46b1f0b65027b005@syzkaller.appspotmail.com
    Reviewed by:    imp, kib
    Fixes:          7b7ba7857ce8 ("Implement CLOCK_TAI")
    Differential Revision:  https://reviews.freebsd.org/D51744
---
 sys/kern/kern_time.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/sys/kern/kern_time.c b/sys/kern/kern_time.c
index 9830e5093a3a..2a6f0989f6aa 100644
--- a/sys/kern/kern_time.c
+++ b/sys/kern/kern_time.c
@@ -571,7 +571,10 @@ kern_clock_nanosleep(struct thread *td, clockid_t clock_id, int flags,
 				td->td_rtcgen =
 				    atomic_load_acq_int(&rtc_generation);
 			error = kern_clock_gettime(td, clock_id, &now);
-			KASSERT(error == 0, ("kern_clock_gettime: %d", error));
+			if (error != 0) {
+				td->td_rtcgen = 0;
+				return (error);
+			}
 			timespecsub(&ts, &now, &ts);
 		}
 		if (ts.tv_sec < 0 || (ts.tv_sec == 0 && ts.tv_nsec == 0)) {