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27 lines
1.0 KiB
Diff
27 lines
1.0 KiB
Diff
From 4498f0aa561092bc656bfabe7c4bdae41bc4a5b4 Mon Sep 17 00:00:00 2001
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From: Felix Fietkau <nbd@nbd.name>
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Date: Tue, 7 May 2024 11:24:50 +0200
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Subject: [PATCH] net: add missing check for TCP fraglist GRO
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It turns out that the existing checks do not guarantee that the skb can be
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pulled up to the GRO offset. When using the usb r8152 network driver with
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GRO fraglist, the BUG() in __skb_pull is often triggered.
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Fix the crash by adding the missing check.
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Fixes: 8d95dc474f85 ("net: add code for TCP fraglist GRO")
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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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---
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net/ipv4/tcp_offload.c | 1 +
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1 file changed, 1 insertion(+)
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--- a/net/ipv4/tcp_offload.c
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+++ b/net/ipv4/tcp_offload.c
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@@ -354,6 +354,7 @@ struct sk_buff *tcp_gro_receive(struct l
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flush |= (__force int)(flags ^ tcp_flag_word(th2));
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flush |= skb->ip_summed != p->ip_summed;
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flush |= skb->csum_level != p->csum_level;
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+ flush |= !pskb_may_pull(skb, skb_gro_offset(skb));
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flush |= NAPI_GRO_CB(p)->count >= 64;
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if (flush || skb_gro_receive_list(p, skb))
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