bisecting fixing commit since dfb571610ba392179348c8472bfb131d4173d585
building syzkaller on f89ed068375b8e31b9575a0ecc834c602657a9a9
testing commit dfb571610ba392179348c8472bfb131d4173d585 with gcc (GCC) 8.4.1 20210217
kernel signature: 5bb25aec46f27e6de9685f27badad9ed0eaf1d8398c673b4f2720c94727ffec0
run #0: crashed: SYZFAIL: netlink_send_ext: short netlink write
run #1: crashed: SYZFAIL: netlink_send_ext: short netlink write
run #2: crashed: SYZFAIL: netlink_send_ext: short netlink write
run #3: crashed: SYZFAIL: netlink_send_ext: short netlink write
run #4: crashed: SYZFAIL: netlink_send_ext: short netlink write
run #5: crashed: SYZFAIL: netlink_send_ext: short netlink write
run #6: crashed: SYZFAIL: netlink_send_ext: short netlink write
run #7: crashed: SYZFAIL: netlink_send_ext: short netlink write
run #8: crashed: SYZFAIL: netlink_send_ext: short netlink write
run #9: crashed: SYZFAIL: netlink_send_ext: short netlink write
run #10: crashed: SYZFAIL: netlink_send_ext: netlink read failed
run #11: crashed: SYZFAIL: netlink_send_ext: short netlink write
run #12: crashed: SYZFAIL: netlink_send_ext: short netlink write
run #13: crashed: SYZFAIL: netlink_send_ext: short netlink write
run #14: crashed: SYZFAIL: netlink_send_ext: short netlink write
run #15: crashed: SYZFAIL: netlink_send_ext: short netlink write
run #16: crashed: SYZFAIL: netlink_send_ext: short netlink write
run #17: crashed: SYZFAIL: netlink_send_ext: short netlink write
run #18: crashed: SYZFAIL: netlink_send_ext: short netlink write
run #19: crashed: SYZFAIL: netlink_send_ext: short netlink write
testing current HEAD 9f84340f012ee60c12aacc03662bcdd67419a31a
testing commit 9f84340f012ee60c12aacc03662bcdd67419a31a with gcc (GCC) 8.4.1 20210217
kernel signature: b1151efe12360dc3449b69f7f84c23c6c8abc28d34d3574d195ebd4eb00bfc8c
all runs: crashed: SYZFAIL: netlink_send_ext: short netlink write
revisions tested: 2, total time: 23m38.664662254s (build: 16m30.525259053s, test: 6m47.781701402s)
the crash still happens on HEAD
commit msg: Linux 4.19.196
crash: SYZFAIL: netlink_send_ext: short netlink write
2021/07/03 03:37:20 executed programs: 673
2021/07/03 03:37:25 executed programs: 1405
2021/07/03 03:37:30 result: hanged=false err=executor 2: exit status 67
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
wrote=-1, want=36 (errno 9: Bad file descriptor)
SYZFAIL: child failed
 (errno 0: Success)
loop exited with status 67


SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
wrote=-1, want=36 (errno 9: Bad file descriptor)
SYZFAIL: child failed
 (errno 0: Success)
loop exited with status 67
2021/07/03 03:37:30 executed programs: 2092
2021/07/03 03:37:37 executed programs: 2104