bisecting fixing commit since e0f8b8a65a473a8baa439cf865a694bbeb83fe90
building syzkaller on 5d7b90f1af2e3bf33992b75e7fcf0bab6bf49bd6
testing commit e0f8b8a65a473a8baa439cf865a694bbeb83fe90
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 2d3409d49c51a2e3289dc5671e1daf27063dc72ca09f2de97126d2a8c885c740
run #0: crashed: possible deadlock in console_unlock
run #1: crashed: possible deadlock in pty_write
run #2: crashed: possible deadlock in console_unlock
run #3: crashed: possible deadlock in console_unlock
run #4: crashed: possible deadlock in pty_write
run #5: crashed: possible deadlock in pty_write
run #6: crashed: possible deadlock in console_unlock
run #7: crashed: possible deadlock in console_unlock
run #8: crashed: possible deadlock in console_unlock
run #9: crashed: possible deadlock in console_unlock
run #10: crashed: possible deadlock in console_unlock
run #11: crashed: possible deadlock in pty_write
run #12: crashed: possible deadlock in pty_write
run #13: crashed: possible deadlock in console_unlock
run #14: crashed: possible deadlock in console_unlock
run #15: crashed: possible deadlock in console_unlock
run #16: crashed: possible deadlock in pty_write
run #17: crashed: possible deadlock in pty_write
run #18: crashed: possible deadlock in console_unlock
run #19: crashed: possible deadlock in console_unlock
testing current HEAD f96eb53cbd76415edfba99c2cfa88567a885a428
testing commit f96eb53cbd76415edfba99c2cfa88567a885a428
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: d48e9d15bc8d09c9bf7e9a9366630e50ac7d53605ab37c2e834d7259f52346d2
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 33m52.617656082s (build: 25m38.505877162s, test: 6m41.612016915s)
the crash still happens on HEAD
commit msg: Linux 4.14.246
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1