Messages in this thread Patch in this message | | | From | Edward Adam Davis <> | Subject | Re: [syzbot] [bpf?] [net?] general protection fault in dev_map_enqueue | Date | Thu, 28 Mar 2024 06:55:08 +0800 |
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please test null ptr deref in dev_map_enqueue
#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 66a27abac311
diff --git a/net/core/filter.c b/net/core/filter.c index 8adf95765cdd..721b85aebf58 100644 --- a/net/core/filter.c +++ b/net/core/filter.c @@ -4381,6 +4381,10 @@ static __always_inline int __xdp_do_redirect_frame(struct bpf_redirect_info *ri, err = dev_map_enqueue_multi(xdpf, dev, map, ri->flags & BPF_F_EXCLUDE_INGRESS); } else { + if (unlikely(!fwd)) { + err = -EINVAL; + break; + } err = dev_map_enqueue(fwd, xdpf, dev); } break;
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