drivers/pps/pps.c: clear offset flags in PPS_SETPARAMS ioctl
authorMiroslav Lichvar <mlichvar@redhat.com>
Tue, 16 Jul 2019 23:30:09 +0000 (16:30 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 17 Jul 2019 02:23:24 +0000 (19:23 -0700)
commit5515e9a6273b8c02034466bcbd717ac9f53dab99
tree1d220ff01eec684823f3c95dac7244f36062251f
parentf57e515a1b56325a28a0972c632a623a9c84590c
drivers/pps/pps.c: clear offset flags in PPS_SETPARAMS ioctl

The PPS assert/clear offset corrections are set by the PPS_SETPARAMS
ioctl in the pps_ktime structs, which also contain flags.  The flags are
not initialized by applications (using the timepps.h header) and they
are not used by the kernel for anything except returning them back in
the PPS_GETPARAMS ioctl.

Set the flags to zero to make it clear they are unused and avoid leaking
uninitialized data of the PPS_SETPARAMS caller to other applications
that have a read access to the PPS device.

Link: http://lkml.kernel.org/r/20190702092251.24303-1-mlichvar@redhat.com
Signed-off-by: Miroslav Lichvar <mlichvar@redhat.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Rodolfo Giometti <giometti@enneenne.com>
Cc: Greg KH <greg@kroah.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
drivers/pps/pps.c