[PATCH perf/core] uprobes: guard against kmemdup() failing in dup_return_instance()
From: Andrii Nakryiko <andrii@kernel.org>
Date: 2024-12-06 18:34:41
Also in:
bpf, lkml
Subsystem:
performance events subsystem, the rest, uprobes · Maintainers:
Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo, Namhyung Kim, Linus Torvalds, Masami Hiramatsu, Oleg Nesterov
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