Commit 83d0bdc7 authored by Miroslav Lichvar's avatar Miroslav Lichvar Committed by David S. Miller

ptp: check gettime64 return code in PTP_SYS_OFFSET ioctl

If a gettime64 call fails, return the error and avoid copying data back
to user.

Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: default avatarMiroslav Lichvar <mlichvar@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent fbb960ac
......@@ -228,7 +228,9 @@ long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg)
pct->sec = ts.tv_sec;
pct->nsec = ts.tv_nsec;
pct++;
ptp->info->gettime64(ptp->info, &ts);
err = ptp->info->gettime64(ptp->info, &ts);
if (err)
goto out;
pct->sec = ts.tv_sec;
pct->nsec = ts.tv_nsec;
pct++;
......@@ -281,6 +283,7 @@ long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg)
break;
}
out:
kfree(sysoff);
return err;
}
......
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