Commit 02a9079c authored by Vlad Tsyrklevich's avatar Vlad Tsyrklevich Committed by David S. Miller
Browse files

drivers/ptp: Fix kernel memory disclosure

The reserved field precise_offset->rsv is not cleared before being
copied to user space, leaking kernel stack memory. Clear the struct
before it's copied.

Signed-off-by: default avatarVlad Tsyrklevich <>
Acked-by: default avatarRichard Cochran <>
Signed-off-by: default avatarDavid S. Miller <>
parent b8a4ddb2
......@@ -193,6 +193,7 @@ long ptp_ioctl(struct posix_clock *pc, unsigned int cmd, unsigned long arg)
if (err)
memset(&precise_offset, 0, sizeof(precise_offset));
ts = ktime_to_timespec64(xtstamp.device);
precise_offset.device.sec = ts.tv_sec;
precise_offset.device.nsec = ts.tv_nsec;
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