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From: Emanuele Ghidoli <emanuele.ghidoli(a)toradex.com>
If an input changes state during wake-up and is used as an interrupt
source, the IRQ handler reads the volatile input register to clear the
interrupt mask and deassert the IRQ line. However, the IRQ handler is
triggered before access to the register is granted, causing the read
operation to fail.
As a result, the IRQ handler enters a loop, repeatedly printing the
"failed reading register" message, until `pca953x_resume` is eventually
called, which restores the driver context and enables access to
registers.
Fix by using DEFINE_NOIRQ_DEV_PM_OPS which ensures that `pca953x_resume`
is called before the IRQ handler is called.
Fixes: b76574300504 ("gpio: pca953x: Restore registers after suspend/resume cycle")
Cc: stable(a)vger.kernel.org
Signed-off-by: Emanuele Ghidoli <emanuele.ghidoli(a)toradex.com>
Signed-off-by: Francesco Dolcini <francesco.dolcini(a)toradex.com>
---
drivers/gpio/gpio-pca953x.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index d63c1030e6ac..d39bdc125cfc 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -1252,7 +1252,7 @@ static int pca953x_resume(struct device *dev)
return ret;
}
-static DEFINE_SIMPLE_DEV_PM_OPS(pca953x_pm_ops, pca953x_suspend, pca953x_resume);
+static DEFINE_NOIRQ_DEV_PM_OPS(pca953x_pm_ops, pca953x_suspend, pca953x_resume);
/* convenience to stop overlong match-table lines */
#define OF_653X(__nrgpio, __int) ((void *)(__nrgpio | PCAL653X_TYPE | __int))
--
2.39.5
From: Nam Cao <namcao(a)linutronix.de>
When rv_is_container_monitor() is called on the last monitor in
rv_monitors_list, KASAN yells:
BUG: KASAN: global-out-of-bounds in rv_is_container_monitor+0x101/0x110
Read of size 8 at addr ffffffff97c7c798 by task setup/221
The buggy address belongs to the variable:
rv_monitors_list+0x18/0x40
This is due to list_next_entry() is called on the last entry in the list.
It wraps around to the first list_head, and the first list_head is not
embedded in struct rv_monitor_def.
Fix it by checking if the monitor is last in the list.
Cc: stable(a)vger.kernel.org
Cc: Gabriele Monaco <gmonaco(a)redhat.com>
Fixes: cb85c660fcd4 ("rv: Add option for nested monitors and include sched")
Link: https://lore.kernel.org/e85b5eeb7228bfc23b8d7d4ab5411472c54ae91b.1744355018…
Signed-off-by: Nam Cao <namcao(a)linutronix.de>
Signed-off-by: Steven Rostedt (Google) <rostedt(a)goodmis.org>
---
kernel/trace/rv/rv.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/kernel/trace/rv/rv.c b/kernel/trace/rv/rv.c
index 968c5c3b0246..e4077500a91d 100644
--- a/kernel/trace/rv/rv.c
+++ b/kernel/trace/rv/rv.c
@@ -225,7 +225,12 @@ bool rv_is_nested_monitor(struct rv_monitor_def *mdef)
*/
bool rv_is_container_monitor(struct rv_monitor_def *mdef)
{
- struct rv_monitor_def *next = list_next_entry(mdef, list);
+ struct rv_monitor_def *next;
+
+ if (list_is_last(&mdef->list, &rv_monitors_list))
+ return false;
+
+ next = list_next_entry(mdef, list);
return next->parent == mdef->monitor || !mdef->monitor->enable;
}
--
2.47.2
From: Steven Rostedt <rostedt(a)goodmis.org>
The following causes a vsnprintf fault:
# echo 's:wake_lat char[] wakee; u64 delta;' >> /sys/kernel/tracing/dynamic_events
# echo 'hist:keys=pid:ts=common_timestamp.usecs if !(common_flags & 0x18)' > /sys/kernel/tracing/events/sched/sched_waking/trigger
# echo 'hist:keys=next_pid:delta=common_timestamp.usecs-$ts:onmatch(sched.sched_waking).trace(wake_lat,next_comm,$delta)' > /sys/kernel/tracing/events/sched/sched_switch/trigger
Because the synthetic event's "wakee" field is created as a dynamic string
(even though the string copied is not). The print format to print the
dynamic string changed from "%*s" to "%s" because another location
(__set_synth_event_print_fmt()) exported this to user space, and user
space did not need that. But it is still used in print_synth_event(), and
the output looks like:
<idle>-0 [001] d..5. 193.428167: wake_lat: wakee=(efault)sshd-sessiondelta=155
sshd-session-879 [001] d..5. 193.811080: wake_lat: wakee=(efault)kworker/u34:5delta=58
<idle>-0 [002] d..5. 193.811198: wake_lat: wakee=(efault)bashdelta=91
bash-880 [002] d..5. 193.811371: wake_lat: wakee=(efault)kworker/u35:2delta=21
<idle>-0 [001] d..5. 193.811516: wake_lat: wakee=(efault)sshd-sessiondelta=129
sshd-session-879 [001] d..5. 193.967576: wake_lat: wakee=(efault)kworker/u34:5delta=50
The length isn't needed as the string is always nul terminated. Just print
the string and not add the length (which was hard coded to the max string
length anyway).
Cc: stable(a)vger.kernel.org
Cc: Mathieu Desnoyers <mathieu.desnoyers(a)efficios.com>
Cc: Tom Zanussi <zanussi(a)kernel.org>
Cc: Douglas Raillard <douglas.raillard(a)arm.com>
Acked-by: Masami Hiramatsu (Google) <mhiramat(a)kernel.org>
Link: https://lore.kernel.org/20250407154139.69955768@gandalf.local.home
Fixes: 4d38328eb442d ("tracing: Fix synth event printk format for str fields");
Signed-off-by: Steven Rostedt (Google) <rostedt(a)goodmis.org>
---
kernel/trace/trace_events_synth.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/kernel/trace/trace_events_synth.c b/kernel/trace/trace_events_synth.c
index 969f48742d72..33cfbd4ed76d 100644
--- a/kernel/trace/trace_events_synth.c
+++ b/kernel/trace/trace_events_synth.c
@@ -370,7 +370,6 @@ static enum print_line_t print_synth_event(struct trace_iterator *iter,
union trace_synth_field *data = &entry->fields[n_u64];
trace_seq_printf(s, print_fmt, se->fields[i]->name,
- STR_VAR_LEN_MAX,
(char *)entry + data->as_dynamic.offset,
i == se->n_fields - 1 ? "" : " ");
n_u64++;
--
2.47.2