bisecting fixing commit since dfb571610ba392179348c8472bfb131d4173d585
building syzkaller on f89ed068375b8e31b9575a0ecc834c602657a9a9
testing commit dfb571610ba392179348c8472bfb131d4173d585 with gcc (GCC) 8.4.1 20210217
kernel signature: 7753ee012c376d083e86a64b574a40e60f16d41005337f1a64bcc86a5d6f9da5
run #0: crashed: SYZFAIL: netlink_send_ext: netlink read failed
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: 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 97a8651cadce7c2b7c4d8f108b392eff31fe2c08
testing commit 97a8651cadce7c2b7c4d8f108b392eff31fe2c08 with gcc (GCC) 8.4.1 20210217
kernel signature: fb13f0a72acbc8e8f5d1e3a1623b1b662ea54814bb788c6df389ea63c72658c8
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: netlink read failed
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: 24m44.961411822s (build: 17m21.652282214s, test: 7m1.956447452s)
the crash still happens on HEAD
commit msg: Linux 4.19.189
crash: SYZFAIL: netlink_send_ext: short netlink write
2021/05/04 02:23:07 executed programs: 641
2021/05/04 02:23:12 executed programs: 1349
2021/05/04 02:23:14 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=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
wrote=-1, want=36 (errno 9: Bad file descriptor)
SYZFAIL: child failed
 (errno 0: Success)
loop exited with status 67
2021/05/04 02:23:21 executed programs: 1504