Schichan Nicolas fe15f3f106 ARM: 7598/1: net: bpf_jit_32: fix sp-relative load/stores offsets. ... The offset must be multiplied by 4 to be sure to access the correct 32bit word in the stack scratch space. For instance, a store at scratch memory cell #1 was generating the following: st r4, [sp, #1] While the correct code for this is: st r4, [sp, #4] To reproduce the bug (assuming your system has a NIC with the mac address 52:54:00:12:34:56): echo 0 > /proc/sys/net/core/bpf_jit_enable tcpdump -ni eth0 "ether[1] + ether[2] - ether[3] * ether[4] - ether[5] \ == -0x3AA" # this will capture packets as expected echo 1 > /proc/sys/net/core/bpf_jit_enable tcpdump -ni eth0 "ether[1] + ether[2] - ether[3] * ether[4] - ether[5] \ == -0x3AA" # this will not. This bug was present since the original inclusion of bpf_jit for ARM (ddecdfce: ARM: 7259/3: net: JIT compiler for packet filters). Signed-off-by: Nicolas Schichan <nschichan@freebox.fr> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>		2012-12-11 00:19:29 +00:00
..
bpf_jit_32.c	ARM: 7598/1: net: bpf_jit_32: fix sp-relative load/stores offsets.	2012-12-11 00:19:29 +00:00
bpf_jit_32.h	ARM: 7421/1: bpf_jit: BPF_S_ANC_ALU_XOR_X support	2012-06-14 15:12:13 +01:00
Makefile