bisecting fixing commit since e0f8b8a65a473a8baa439cf865a694bbeb83fe90
building syzkaller on 5d7b90f1af2e3bf33992b75e7fcf0bab6bf49bd6
testing commit e0f8b8a65a473a8baa439cf865a694bbeb83fe90
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 3b19b6e5e51fd1d41e9719be5fda7c425a31cfa2b951802b336ba03fe9e76cfa
run #0: crashed: possible deadlock in console_unlock
run #1: crashed: possible deadlock in console_unlock
run #2: crashed: possible deadlock in pty_write
run #3: crashed: possible deadlock in console_unlock
run #4: crashed: possible deadlock in pty_write
run #5: crashed: possible deadlock in console_unlock
run #6: crashed: possible deadlock in console_unlock
run #7: crashed: possible deadlock in pty_write
run #8: crashed: possible deadlock in pty_write
run #9: crashed: possible deadlock in pty_write
run #10: crashed: possible deadlock in pty_write
run #11: crashed: possible deadlock in console_unlock
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 pty_write
run #16: crashed: possible deadlock in console_unlock
run #17: crashed: possible deadlock in pty_write
run #18: crashed: possible deadlock in pty_write
run #19: crashed: possible deadlock in console_unlock
testing current HEAD 15a1c6b6f5162f7b70cf9a77cd8ed9771c1f0b53
testing commit 15a1c6b6f5162f7b70cf9a77cd8ed9771c1f0b53
compiler: gcc version 8.4.1 20210217 (GCC)
kernel signature: 8d05657ff69c09b8f4ff9fd1301226fa6597b1a2346bf0261fedb18afaecf19a
all runs: crashed: unregister_netdevice: waiting for DEV to become free
revisions tested: 2, total time: 29m48.147181584s (build: 22m30.509930431s, test: 6m8.78207043s)
the crash still happens on HEAD
commit msg: Linux 4.14.276
crash: unregister_netdevice: waiting for DEV to become free
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1