git bisect start '--' 'net/netfilter'
# bad: [8fe28cb58bcb235034b64cbbb7550a8a43fd88be] Linux 4.20
git bisect bad 8fe28cb58bcb235034b64cbbb7550a8a43fd88be
# good: [84df9525b0c27f3ebc2ebb1864fa62a97fdedb7d] Linux 4.19
git bisect good 84df9525b0c27f3ebc2ebb1864fa62a97fdedb7d
# skip: [da8a705ccbe1957c30bc6b6d2160a0fd0bb01c4d] netfilter: remove two unused variables.
git bisect skip da8a705ccbe1957c30bc6b6d2160a0fd0bb01c4d
# bad: [0fb39bbe43d4481fcf300d2b5822de60942fd189] netfilter: nf_tables: don't skip inactive chains during update
git bisect bad 0fb39bbe43d4481fcf300d2b5822de60942fd189
# bad: [9000a457a0c84883874a844ef94adf26f633f3b4] Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next
git bisect bad 9000a457a0c84883874a844ef94adf26f633f3b4
# good: [0150ffbac78318549bf4818ddee3481d87100928] netfilter: conntrack: avoid using ->error callback if possible
git bisect good 0150ffbac78318549bf4818ddee3481d87100928
# good: [b473a1f5ddee5f73392c387940f4fbcbabfc3431] netfilter: nf_tables: add requirements for connsecmark support
git bisect good b473a1f5ddee5f73392c387940f4fbcbabfc3431
# good: [ffa0a9a5903e9fcfde71a0200af30692ac223ef7] netfilter: xt_quota: Don't use aligned attribute in sizeof
git bisect good ffa0a9a5903e9fcfde71a0200af30692ac223ef7
# bad: [6f41617bf23a17d9cb7cc6ca8161534f05f80293] Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
git bisect bad 6f41617bf23a17d9cb7cc6ca8161534f05f80293
# good: [d888f39666774c7debfa34e4e20ba33cf61a6d71] net-ipv4: remove 2 always zero parameters from ipv4_update_pmtu()
git bisect good d888f39666774c7debfa34e4e20ba33cf61a6d71
# first bad commit: [6f41617bf23a17d9cb7cc6ca8161534f05f80293] Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net