bisecting fixing commit since 397a88b2cc869c823bf40bc403d36a62afec1edd
building syzkaller on f89ed068375b8e31b9575a0ecc834c602657a9a9
testing commit 397a88b2cc869c823bf40bc403d36a62afec1edd with gcc (GCC) 8.4.1 20210217
kernel signature: dbee8552c0d02f02f6c67587ce5cd9abf6be7e1b874a9a0b010d22eda61e17ab
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: short netlink write
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: netlink read failed
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 bd634aa6416382439890b78f7be0023020a86207
testing commit bd634aa6416382439890b78f7be0023020a86207 with gcc (GCC) 8.4.1 20210217
kernel signature: 1021552ebb6d44c41946c90b36d52c664619bfc70e1e4283e4f28d7b3a8ff06f
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: netlink read failed
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
revisions tested: 2, total time: 22m59.673175931s (build: 15m32.557141371s, test: 7m5.367903042s)
the crash still happens on HEAD
commit msg: Linux 4.14.228
crash: SYZFAIL: netlink_send_ext: short netlink write
2021/04/04 00:23:38 executed programs: 590
2021/04/04 00:23:43 executed programs: 1412
2021/04/04 00:23:48 executed programs: 2242
2021/04/04 00:23:53 executed programs: 3063
2021/04/04 00:23:55 result: hanged=false err=executor 2: exit status 67
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
wrote=-1, want=28 (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
wrote=-1, want=28 (errno 9: Bad file descriptor)
SYZFAIL: child failed
 (errno 0: Success)
loop exited with status 67
2021/04/04 00:23:58 executed programs: 3460
2021/04/04 00:24:03 executed programs: 4239
2021/04/04 00:24:04 result: hanged=false err=executor 1: exit status 67
SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
wrote=-1, want=28SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
wrote=-1, want=28 (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
wrote=-1, want=28SYZFAIL: netlink_send_ext: short netlink write
SYZFAIL: netlink_send_ext: short netlink write
wrote=-1, want=28 (errno 9: Bad file descriptor)
SYZFAIL: child failed
 (errno 0: Success)
loop exited with status 67