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authorMichael Holzheu <holzheu@linux.vnet.ibm.com>2016-05-11 21:13:13 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2016-05-19 09:14:27 +0200
commit6edf0aa4f8bbdfbb4d6d786892fa02728d05dc36 (patch)
treedfedd7338bb67042614d3e676f498405c1a52f98 /arch/s390/defconfig
parents390/bpf: reduce maximum program size to 64 KB (diff)
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s390/bpf: fix recache skb->data/hlen for skb_vlan_push/pop
In case of usage of skb_vlan_push/pop, in the prologue we store the SKB pointer on the stack and restore it after BPF_JMP_CALL to skb_vlan_push/pop. Unfortunately currently there are two bugs in the code: 1) The wrong stack slot (offset 170 instead of 176) is used 2) The wrong register (W1 instead of B1) is saved So fix this and use correct stack slot and register. Fixes: 9db7f2b81880 ("s390/bpf: recache skb->data/hlen for skb_vlan_push/pop") Cc: stable@vger.kernel.org # 4.3+ Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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