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time: adjtimex: Validate the ADJ_FREQUENCY values
authorSasha Levin <[email protected]>
Thu, 4 Dec 2014 00:25:05 +0000 (19:25 -0500)
committerJohn Stultz <[email protected]>
Wed, 7 Jan 2015 17:50:32 +0000 (09:50 -0800)
commit5e5aeb4367b450a28f447f6d5ab57d8f2ab16a5f
tree13c92234f198f0cc9147b65f4d90bcb15018f9e9tree | snapshot
parent6ada1fc0e1c4775de0e043e1bd3ae9d065491aa5commit | diff
time: adjtimex: Validate the ADJ_FREQUENCY values

Verify that the frequency value from userspace is valid and makes sense.

Unverified values can cause overflows later on.

Cc: Thomas Gleixner <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: stable <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
[jstultz: Fix up bug for negative values and drop redunent cap check]
Signed-off-by: John Stultz <[email protected]>
kernel/time/ntp.c diff | blob | blame | history
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