ptp: check gettime64 return code in PTP_SYS_OFFSET ioctl
[ Upstream commit 83d0bdc7390b890905634186baaa294475cd6a06 ] 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: Miroslav Lichvar <mlichvar@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>
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1 changed files with 4 additions and 1 deletions
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@ -204,7 +204,9 @@ long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg)
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pct->sec = ts.tv_sec;
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pct->nsec = ts.tv_nsec;
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pct++;
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ptp->info->gettime64(ptp->info, &ts);
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err = ptp->info->gettime64(ptp->info, &ts);
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if (err)
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goto out;
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pct->sec = ts.tv_sec;
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pct->nsec = ts.tv_nsec;
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pct++;
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@ -257,6 +259,7 @@ long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg)
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break;
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}
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out:
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kfree(sysoff);
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return err;
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}
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