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Merge 5.4.233 into android11-5.4-lts

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Changes in 5.4.233
	dma-mapping: add generic helpers for mapping sgtable objects
	scatterlist: add generic wrappers for iterating over sgtable objects
	drm: etnaviv: fix common struct sg_table related issues
	drm/etnaviv: don't truncate physical page address
	wifi: rtl8xxxu: gen2: Turn on the rate control
	powerpc: dts: t208x: Mark MAC1 and MAC2 as 10G
	random: always mix cycle counter in add_latent_entropy()
	KVM: x86: Fail emulation during EMULTYPE_SKIP on any exception
	KVM: VMX: Execute IBPB on emulated VM-exit when guest has IBRS
	can: kvaser_usb: hydra: help gcc-13 to figure out cmd_len
	powerpc: dts: t208x: Disable 10G on MAC1 and MAC2
	alarmtimer: Prevent starvation by small intervals and SIG_IGN
	drm/i915/gvt: fix double free bug in split_2MB_gtt_entry
	mac80211: mesh: embedd mesh_paths and mpp_paths into ieee80211_if_mesh
	uaccess: Add speculation barrier to copy_from_user()
	wifi: mwifiex: Add missing compatible string for SD8787
	ext4: Fix function prototype mismatch for ext4_feat_ktype
	Revert "net/sched: taprio: make qdisc_leaf() see the per-netdev-queue pfifo child qdiscs"
	bpf: add missing header file include
	Linux 5.4.233

Change-Id: I83441dec5bd3c2ad6af19017fe9b467f7ffa2ea5
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Greg Kroah-Hartman 2023-02-25 15:52:40 +00:00
commit 6bb176e034
25 changed files with 410 additions and 144 deletions
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3
kernel/bpf/core.c
View file

@ -30,6 +30,7 @@
#include <linux/kallsyms.h>
#include <linux/rcupdate.h>
#include <linux/perf_event.h>
#include <linux/nospec.h>
#include <asm/barrier.h>
#include <asm/unaligned.h>
@ -1576,9 +1577,7 @@ out:
* reuse preexisting logic from Spectre v1 mitigation that
* happens to produce the required code on x86 for v4 as well.
*/
#ifdef CONFIG_X86
barrier_nospec();
#endif
CONT;
#define LDST(SIZEOP, SIZE) \
STX_MEM_##SIZEOP: \

33
kernel/time/alarmtimer.c
View file

@ -479,11 +479,35 @@ u64 alarm_forward(struct alarm *alarm, ktime_t now, ktime_t interval)
}
EXPORT_SYMBOL_GPL(alarm_forward);
u64 alarm_forward_now(struct alarm *alarm, ktime_t interval)
static u64 __alarm_forward_now(struct alarm *alarm, ktime_t interval, bool throttle)
{
struct alarm_base *base = &alarm_bases[alarm->type];
ktime_t now = base->gettime();
return alarm_forward(alarm, base->gettime(), interval);
if (IS_ENABLED(CONFIG_HIGH_RES_TIMERS) && throttle) {
/*
* Same issue as with posix_timer_fn(). Timers which are
* periodic but the signal is ignored can starve the system
* with a very small interval. The real fix which was
* promised in the context of posix_timer_fn() never
* materialized, but someone should really work on it.
*
* To prevent DOS fake @now to be 1 jiffie out which keeps
* the overrun accounting correct but creates an
* inconsistency vs. timer_gettime(2).
*/
ktime_t kj = NSEC_PER_SEC / HZ;
if (interval < kj)
now = ktime_add(now, kj);
}
return alarm_forward(alarm, now, interval);
}
u64 alarm_forward_now(struct alarm *alarm, ktime_t interval)
{
return __alarm_forward_now(alarm, interval, false);
}
EXPORT_SYMBOL_GPL(alarm_forward_now);
@ -557,9 +581,10 @@ static enum alarmtimer_restart alarm_handle_timer(struct alarm *alarm,
if (posix_timer_event(ptr, si_private) && ptr->it_interval) {
/*
* Handle ignored signals and rearm the timer. This will go
* away once we handle ignored signals proper.
* away once we handle ignored signals proper. Ensure that
* small intervals cannot starve the system.
*/
ptr->it_overrun += alarm_forward_now(alarm, ptr->it_interval);
ptr->it_overrun += __alarm_forward_now(alarm, ptr->it_interval, true);
++ptr->it_requeue_pending;
ptr->it_active = 1;
result = ALARMTIMER_RESTART;