Lukas Hannen d545fd4f97 time: Handle negative seconds correctly in timespec64_to_ns() ... commit 39ff83f2f6cc5cc1458dfcea9697f96338210beb upstream. timespec64_ns() prevents multiplication overflows by comparing the seconds value of the timespec to KTIME_SEC_MAX. If the value is greater or equal it returns KTIME_MAX. But that check casts the signed seconds value to unsigned which makes the comparision true for all negative values and therefore return wrongly KTIME_MAX. Negative second values are perfectly valid and required in some places, e.g. ptp_clock_adjtime(). Remove the cast and add a check for the negative boundary which is required to prevent undefined behaviour due to multiplication underflow. Fixes: cb47755725 ("time: Prevent undefined behaviour in timespec64_to_ns()")' Signed-off-by: Lukas Hannen <lukas.hannen@opensource.tttech-industrial.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/AM6PR01MB541637BD6F336B8FFB72AF80EEC69@AM6PR01MB5416.eurprd01.prod.exchangelabs.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2024-07-05 19:13:39 +02:00
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acpi
asm-generic	vmlinux.lds.h: Handle clang's module.{c,d}tor sections	2024-07-05 18:55:16 +02:00
clocksource
crypto
drm	drm: Return -ENOTTY for non-drm ioctls	2021-07-28 14:35:47 +02:00
dt-bindings
keys
kunit
kvm
linux	time: Handle negative seconds correctly in timespec64_to_ns()	2024-07-05 19:13:39 +02:00
math-emu
media
memory
misc
net	Revert "flow_offload: action should not be NULL when it is referenced"	2024-07-05 18:55:48 +02:00
pcmcia
ras
rdma
scsi
soc	firmware: raspberrypi: Keep count of all consumers	2024-07-05 19:12:05 +02:00
sound	ALSA: hda: intel-nhlt: verify config type	2021-03-09 11:11:14 +01:00
target
trace
uapi	bpf: Fix a typo of reuseport map in bpf.h.	2024-07-05 19:10:44 +02:00
vdso
video
xen