[PATCH bpf-next v2 23/26] bpf: Handle allocation failure in acquire_lock_state

Kumar Kartikeya Dwivedi
2025-02-06T10:55:10Z

The acquire_lock_state function needs to handle possible NULL values
returned by acquire_reference_state, and return -ENOMEM.

Fixes: 769b0f1c8214 ("bpf: Refactor {acquire,release}_reference_state")
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
---
kernel/bpf/verifier.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 9971c03adfd5..d6999d085c7d 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -1501,6 +1501,8 @@ static int acquire_lock_state(struct bpf_verifier_env *env, int insn_idx, enum r
struct bpf_reference_state *s;

s = acquire_reference_state(env, insn_idx);
+ if (!s)
+ return -ENOMEM;
s->type = type;
s->id = id;
s->ptr = ptr;
--
2.43.5