| Message ID | 20241206183436.968068-1-andrii@kernel.org (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | [perf/core] uprobes: guard against kmemdup() failing in dup_return_instance() | expand |
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 >
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,
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(+)