bisecting fixing commit since 69b94dd6dcd14d9bfcba35a492f5e27c15cf4d0a
building syzkaller on 70c104a18f3d409bc6dde950b50258d3d280d99b
testing commit 69b94dd6dcd14d9bfcba35a492f5e27c15cf4d0a
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 78225713f75da83f2c2664feddf5323a0b0421cce5c802a631980822564e53aa
run #0: crashed: BUG: unable to handle kernel paging request in __alloc_skb
run #1: crashed: BUG: soft lockup in batadv_iv_send_outstanding_bat_ogm_packet
run #2: crashed: BUG: soft lockup in batadv_iv_send_outstanding_bat_ogm_packet
run #3: crashed: BUG: soft lockup in batadv_iv_send_outstanding_bat_ogm_packet
run #4: crashed: BUG: soft lockup in batadv_iv_send_outstanding_bat_ogm_packet
run #5: crashed: BUG: soft lockup in batadv_iv_send_outstanding_bat_ogm_packet
run #6: crashed: BUG: soft lockup in batadv_iv_send_outstanding_bat_ogm_packet
run #7: crashed: BUG: soft lockup in batadv_iv_send_outstanding_bat_ogm_packet
run #8: crashed: BUG: soft lockup in batadv_iv_send_outstanding_bat_ogm_packet
run #9: crashed: BUG: soft lockup in batadv_iv_send_outstanding_bat_ogm_packet
run #10: crashed: BUG: soft lockup in batadv_iv_send_outstanding_bat_ogm_packet
run #11: crashed: INFO: rcu detected stall in rtnl_newlink
run #12: crashed: INFO: rcu detected stall in corrupted
run #13: crashed: INFO: rcu detected stall in corrupted
run #14: crashed: INFO: rcu detected stall in corrupted
run #15: crashed: INFO: rcu detected stall in corrupted
run #16: crashed: INFO: rcu detected stall in rtnl_newlink
run #17: crashed: INFO: rcu detected stall in corrupted
run #18: crashed: INFO: rcu detected stall in rtnl_newlink
run #19: crashed: INFO: rcu detected stall in rtnl_newlink
testing current HEAD 4ba8e26127c393c32776dff6d79c5b82de6dc542
testing commit 4ba8e26127c393c32776dff6d79c5b82de6dc542
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 7d72a659ed0432a434feb705555c3f4af362c8e0546bd985bb5ae0d155cfac7a
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 32m41.652129423s (build: 23m58.133689579s, test: 8m17.839368531s)
the crash still happens on HEAD
commit msg: Linux 4.14.262
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1