Jakub Kicinski 9a47949562 ptp: improve max_adj check against unreasonable values ... [ Upstream commit 475b92f932168a78da8109acd10bfb7578b8f2bb ] Scaled PPM conversion to PPB may (on 64bit systems) result in a value larger than s32 can hold (freq/scaled_ppm is a long). This means the kernel will not correctly reject unreasonably high ->freq values (e.g. > 4294967295ppb, 281474976645 scaled PPM). The conversion is equivalent to a division by ~66 (65.536), so the value of ppb is always smaller than ppm, but not small enough to assume narrowing the type from long -> s32 is okay. Note that reasonable user space (e.g. ptp4l) will not use such high values, anyway, 4289046510ppb ~= 4.3x, so the fix is somewhat pedantic. Fixes: d39a743511 ("ptp: validate the requested frequency adjustment.") Fixes: d94ba80ebb ("ptp: Added a brand new class driver for ptp clocks.") Signed-off-by: Jakub Kicinski <kuba@kernel.org> Acked-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org>		2021-06-23 14:42:45 +02:00
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idt8a340_reg.h
Kconfig
Makefile
ptp_chardev.c
ptp_clock.c
ptp_clockmatrix.c
ptp_clockmatrix.h
ptp_dte.c
ptp_idt82p33.c
ptp_idt82p33.h
ptp_ines.c
ptp_kvm.c
ptp_pch.c
ptp_private.h
ptp_qoriq_debugfs.c
ptp_qoriq.c
ptp_sysfs.c
ptp_vmw.c