bisecting fixing commit since 14b58326976de6ef3998eefec1dd7f8b38b97a75
building syzkaller on 28ac5c9e93a44c3eb145195ffb55591be58ef510
testing commit 14b58326976de6ef3998eefec1dd7f8b38b97a75
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 09198a89b01e02fdc8ff931dfee2571908feb7b12bc1ec22c182377f718d6e13
run #0: crashed: BUG: corrupted list in l2cap_chan_put
run #1: crashed: KASAN: use-after-free Read in l2cap_sock_shutdown
run #2: crashed: KASAN: use-after-free Read in l2cap_sock_shutdown
run #3: crashed: KASAN: use-after-free Read in l2cap_sock_shutdown
run #4: crashed: KASAN: use-after-free Read in l2cap_sock_shutdown
run #5: crashed: BUG: corrupted list in l2cap_chan_put
run #6: crashed: KASAN: use-after-free Read in l2cap_sock_shutdown
run #7: crashed: BUG: corrupted list in l2cap_chan_put
run #8: crashed: BUG: corrupted list in l2cap_chan_put
run #9: crashed: KASAN: use-after-free Read in l2cap_sock_shutdown
run #10: crashed: BUG: corrupted list in l2cap_chan_put
run #11: crashed: BUG: corrupted list in l2cap_chan_put
run #12: crashed: KASAN: use-after-free Read in l2cap_sock_shutdown
run #13: crashed: BUG: corrupted list in l2cap_chan_put
run #14: crashed: KASAN: use-after-free Read in l2cap_sock_shutdown
run #15: crashed: BUG: corrupted list in l2cap_chan_put
run #16: crashed: KASAN: use-after-free Read in l2cap_sock_shutdown
run #17: crashed: BUG: corrupted list in l2cap_chan_put
run #18: crashed: KASAN: use-after-free Read in l2cap_chan_put
run #19: crashed: BUG: corrupted list in l2cap_chan_put
testing current HEAD 9dfbac0e6b8600043de8dc85ed072f5f1342dc15
testing commit 9dfbac0e6b8600043de8dc85ed072f5f1342dc15
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: fb254b602bc510243786a28dd2fe01946f3692c6116cd80f1b45e2a5db0cb60b
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 29m36.183823594s (build: 16m15.829558502s, test: 12m47.283703621s)
the crash still happens on HEAD
commit msg: Linux 4.14.258
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1