* [PATCH perf/core] uprobes: guard against kmemdup() failing in dup_return_instance()
@ 2024-12-06 18:34 Andrii Nakryiko
2024-12-09 11:13 ` Masami Hiramatsu
0 siblings, 1 reply; 2+ messages in thread
From: Andrii Nakryiko @ 2024-12-06 18:34 UTC (permalink / raw)
To: linux-trace-kernel, peterz, mingo
Cc: oleg, rostedt, mhiramat, bpf, linux-kernel, jolsa, liaochang1,
kernel-team, Andrii Nakryiko
If kmemdup() failed to alloc memory, don't proceed with extra_consumers
copy.
Fixes: e62f2d492728 ("uprobes: Simplify session consumer tracking")
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
---
kernel/events/uprobes.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index 1af950208c2b..1f75a2f91206 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -2048,6 +2048,8 @@ static struct return_instance *dup_return_instance(struct return_instance *old)
struct return_instance *ri;
ri = kmemdup(old, sizeof(*ri), GFP_KERNEL);
+ if (!ri)
+ return NULL;
if (unlikely(old->cons_cnt > 1)) {
ri->extra_consumers = kmemdup(old->extra_consumers,
--
2.43.5
^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [PATCH perf/core] uprobes: guard against kmemdup() failing in dup_return_instance()
2024-12-06 18:34 [PATCH perf/core] uprobes: guard against kmemdup() failing in dup_return_instance() Andrii Nakryiko
@ 2024-12-09 11:13 ` Masami Hiramatsu
0 siblings, 0 replies; 2+ messages in thread
From: Masami Hiramatsu @ 2024-12-09 11:13 UTC (permalink / raw)
To: Andrii Nakryiko
Cc: linux-trace-kernel, peterz, mingo, oleg, rostedt, mhiramat, bpf,
linux-kernel, jolsa, liaochang1, kernel-team
On Fri, 6 Dec 2024 10:34:36 -0800
Andrii Nakryiko <andrii@kernel.org> wrote:
> If kmemdup() failed to alloc memory, don't proceed with extra_consumers
> copy.
>
> Fixes: e62f2d492728 ("uprobes: Simplify session consumer tracking")
> Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Looks good to me.
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Thanks!
> ---
> kernel/events/uprobes.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
> index 1af950208c2b..1f75a2f91206 100644
> --- a/kernel/events/uprobes.c
> +++ b/kernel/events/uprobes.c
> @@ -2048,6 +2048,8 @@ static struct return_instance *dup_return_instance(struct return_instance *old)
> struct return_instance *ri;
>
> ri = kmemdup(old, sizeof(*ri), GFP_KERNEL);
> + if (!ri)
> + return NULL;
>
> if (unlikely(old->cons_cnt > 1)) {
> ri->extra_consumers = kmemdup(old->extra_consumers,
> --
> 2.43.5
>
--
Masami Hiramatsu (Google) <mhiramat@kernel.org>
^ permalink raw reply [flat|nested] 2+ messages in thread
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2024-12-09 11:13 ` Masami Hiramatsu
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