bisecting fixing commit since 84196390620ac0e5070ae36af84c137c6216a7dc
building syzkaller on 8092f30df01f3443831725509ef5a3dae26122c0
testing commit 84196390620ac0e5070ae36af84c137c6216a7dc with gcc (GCC) 10.2.1 20210217
kernel signature: a8c0bbc52cd6dba74699834cd8826baf6d23c6e9b0d4e6e7ddee3b24ba003769
all runs: crashed: SYZFAIL: netlink_send_ext: bad netlink ack type
testing current HEAD c3d0e3fd41b7f0f5d5d5b6022ab7e813f04ea727
testing commit c3d0e3fd41b7f0f5d5d5b6022ab7e813f04ea727 with gcc (GCC) 10.2.1 20210217
kernel signature: 395dee4fdd661fb3fef988d8a09b1fc3d4fa228dee2b81b204e388242cd73fdf
all runs: crashed: SYZFAIL: netlink_send_ext: bad netlink ack type
revisions tested: 2, total time: 24m50.572682822s (build: 13m56.179725723s, test: 10m7.447507729s)
the crash still happens on HEAD
commit msg: Merge tag 'fs.idmapped.mount_setattr.v5.13-rc3' of gitolite.kernel.org:pub/scm/linux/kernel/git/brauner/linux
crash: SYZFAIL: netlink_send_ext: bad netlink ack type
2021/05/20 03:02:10 executor failed 11 times: executor 5: exit status 67
SYZFAIL: netlink_send_ext: bad netlink ack type
type=41 (errno 22: Invalid argument)
SYZFAIL: child failed
 (errno 0: Success)
loop exited with status 67

SYZFAIL: netlink_send_ext: bad netlink ack type
type=41 (errno 22: Invalid argument)
SYZFAIL: child failed
 (errno 0: Success)
loop exited with status 67