[FS#2197] default kernel option CONFIG_BPF_JIT=y breaking bpf filtering on 802.11 monitor mode traffic

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FS#2197 - default kernel option CONFIG_BPF_JIT=y breaking bpf filtering on 802.11 monitor mode traffic
User who did this - André Cancian (cancian)

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I found this ussue while trying to monitor my wan interface using iftop, and it would not show any ipv6 addresses.

I downgraded to version 18, and there this issue doesn't exist, so I tracked the differences on the /etc folder of both 19.x and 18.x versions, and found the culprit to be this line:

net.core.bpf_jit_enable=1

In the file:
/etc/sysctl.d/10-default.conf


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More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=2197#comment8924

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