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SYZFAIL: netlink_send_ext: bad netlink ack type

Status: auto-obsoleted due to no activity on 2025/11/12 02:25
Subsystems: wireless
[Documentation on labels]
First crash: 1733d, last: 98d
Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: SYZFAIL: netlink_send_ext: bad netlink ack type (log)
Repro: syz .config
  
Fix bisection the fix commit could be any of (bisect log):
  06af8679449d coredump: Limit what can interrupt coredumps
  de5540965853 Merge tag 'rtc-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux
   
▶ ▼ Similar bugs (4)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 SYZFAIL: netlink_send_ext: bad netlink ack type origin:upstream -1 syz error 1 127d 893d 0/3 auto-obsoleted due to no activity on 2025/10/24 18:58
linux-4.14 SYZFAIL: netlink_send_ext: bad netlink ack type -1 1 1703d 1703d 0/1 auto-closed as invalid on 2021/07/21 03:33
linux-6.1 SYZFAIL: netlink_send_ext: bad netlink ack type origin:upstream -1 syz error 1 611d 893d 0/3 auto-obsoleted due to no activity on 2025/09/10 04:42
linux-4.19 SYZFAIL: netlink_send_ext: bad netlink ack type -1 syz error 20 1351d 1731d 0/1 upstream: reported syz repro on 2021/02/23 18:14
▶ ▼ Last patch testing requests (10)
Created Duration User Patch Repo Result
2025/10/23 06:20 21m retest repro upstream OK log
2025/10/09 14:00 25m retest repro upstream OK log
2025/09/24 09:01 26m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci OK log
2025/09/10 08:31 18m retest repro upstream OK log
2025/09/10 08:31 18m retest repro upstream OK log
2025/08/28 03:09 21m retest repro upstream OK log
2025/08/28 03:09 21m retest repro upstream OK log
2025/08/28 03:09 21m retest repro upstream OK log
2025/08/28 03:09 21m retest repro upstream OK log
2025/08/14 01:57 24m retest repro upstream report log
▶ ▼ Fix bisection attempts (2)
Created Duration User Patch Repo Result
2021/07/11 14:39 31m bisect fix upstream OK (2) job log
2021/05/20 02:37 24m bisect fix upstream OK (0) job log log

Sample crash report:
2023/12/04 13:57:42 [FATAL] executor failed 11 times: executor 4: exit status 67 err exit status 67
SYZFAIL: netlink_send_ext: bad netlink ack type
type=42 (errno 22: Invalid argument)
SYZFAIL: child failed
 (errno 0: Success)
loop exited with status 67
exit status 67

SYZFAIL: netlink_send_ext: bad netlink ack type
type=42 (errno 22: Invalid argument)
SYZFAIL: child failed
 (errno 0: Success)
loop exited with status 67
exit status 67

Crashes (150):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/12/04 15:31 upstream 33cc938e65a9 f819d6f7 .config console log report syz [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce SYZFAIL: netlink_send_ext: bad netlink ack type
2023/11/20 00:13 upstream 037266a5f723 cb976f63 .config console log report syz [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce SYZFAIL: netlink_send_ext: bad netlink ack type
2023/07/10 21:20 upstream 3f01e9fed845 52ae002a .config console log report syz [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root SYZFAIL: netlink_send_ext: bad netlink ack type
2022/03/10 19:57 upstream 3bf7edc84a9e 9e8eaa75 .config console log report syz ci-upstream-kasan-gce SYZFAIL: netlink_send_ext: bad netlink ack type
2022/03/02 14:37 upstream fb184c4af9b9 45a13a73 .config console log report syz ci-upstream-kasan-gce SYZFAIL: netlink_send_ext: bad netlink ack type
2021/10/17 22:35 upstream d999ade1cc86 0c5d9412 .config console log report syz ci-upstream-kasan-gce SYZFAIL: netlink_send_ext: bad netlink ack type
2021/06/11 13:16 upstream 06af8679449d 1ba81399 .config console log report syz ci-upstream-kasan-gce SYZFAIL: netlink_send_ext: bad netlink ack type
2021/03/23 07:26 upstream 84196390620a 8092f30d .config console log report syz ci-upstream-kasan-gce-root SYZFAIL: netlink_send_ext: bad netlink ack type
2022/04/19 06:50 linux-next 40354149f4d7 8bcc32a6 .config console log report syz ci-upstream-linux-next-kasan-gce-root SYZFAIL: netlink_send_ext: bad netlink ack type
2021/09/28 18:18 linux-next bf5b1e621a51 d82cb927 .config console log report syz ci-upstream-linux-next-kasan-gce-root SYZFAIL: netlink_send_ext: bad netlink ack type
2023/06/11 03:08 upstream 022ce8862dff 7086cdb9 .config console log report syz [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce SYZFAIL: netlink_send_ext: bad netlink ack type
2021/03/02 09:59 upstream fe07bfda2fb9 183afb6c .config console log report syz ci-upstream-kasan-gce SYZFAIL: netlink_send_ext: bad netlink ack type
2021/03/01 10:58 upstream cd278456d4ca 4c37c133 .config console log report syz ci-upstream-kasan-gce SYZFAIL: netlink_send_ext: bad netlink ack type
2021/02/26 18:10 upstream 2c87f7a38f93 4c37c133 .config console log report syz ci-upstream-kasan-gce SYZFAIL: netlink_send_ext: bad netlink ack type
2021/02/24 04:05 upstream 3b9cdafb5358 fcc6d71b .config console log report syz ci-upstream-kasan-gce-root SYZFAIL: netlink_send_ext: bad netlink ack type
2021/02/21 21:32 upstream 55f62bc87347 a659b3f1 .config console log report syz ci-upstream-kasan-gce SYZFAIL: netlink_send_ext: bad netlink ack type
2023/11/16 08:42 upstream c42d9eeef8e5 cb976f63 .config console log report syz [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream SYZFAIL: netlink_send_ext: bad netlink ack type
2023/11/14 11:34 upstream 9bacdd8996c7 cb976f63 .config console log report syz [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream SYZFAIL: netlink_send_ext: bad netlink ack type
2023/10/12 17:38 upstream 401644852d0b 1b231e3c .config console log report syz [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream SYZFAIL: netlink_send_ext: bad netlink ack type
2022/04/25 01:56 upstream 5206548f6e67 131df97d .config console log report info ci-upstream-kasan-gce SYZFAIL: netlink_send_ext: bad netlink ack type
2022/04/24 18:08 upstream 22da5264abf4 131df97d .config console log report info ci-upstream-kasan-gce SYZFAIL: netlink_send_ext: bad netlink ack type
2022/04/16 20:39 upstream 59250f8a7f3a 8bcc32a6 .config console log report info ci-upstream-kasan-gce-selinux-root SYZFAIL: netlink_send_ext: bad netlink ack type
2022/03/12 09:25 upstream 68453767131a 9e8eaa75 .config console log report info ci-upstream-kasan-gce SYZFAIL: netlink_send_ext: bad netlink ack type
2022/03/08 13:44 upstream ea4424be1688 7bdd8b2c .config console log report info ci-upstream-kasan-gce-selinux-root SYZFAIL: netlink_send_ext: bad netlink ack type
2022/03/07 15:27 upstream ffb217a13a2e 7bdd8b2c .config console log report info ci-upstream-kasan-gce-selinux-root SYZFAIL: netlink_send_ext: bad netlink ack type
2022/03/05 08:54 upstream ac84e82f78cb 45a13a73 .config console log report info ci-upstream-kasan-gce SYZFAIL: netlink_send_ext: bad netlink ack type
2022/03/05 03:53 upstream 07ebd38a0da2 45a13a73 .config console log report info ci-upstream-kasan-gce-smack-root SYZFAIL: netlink_send_ext: bad netlink ack type
2022/03/04 13:31 upstream 38f80f42147f 45a13a73 .config console log report info ci-upstream-kasan-gce-smack-root SYZFAIL: netlink_send_ext: bad netlink ack type
2022/03/02 17:30 upstream fb184c4af9b9 45a13a73 .config console log report info ci-upstream-kasan-gce-selinux-root SYZFAIL: netlink_send_ext: bad netlink ack type
2022/03/02 01:56 upstream 575115360652 45a13a73 .config console log report info ci-upstream-kasan-gce SYZFAIL: netlink_send_ext: bad netlink ack type
2022/02/28 00:16 upstream 2293be58d6a1 45a13a73 .config console log report info ci-upstream-kasan-gce SYZFAIL: netlink_send_ext: bad netlink ack type
2022/02/08 19:43 upstream 555f3d7be91a 0b33604d .config console log report info ci-upstream-kasan-gce SYZFAIL: netlink_send_ext: bad netlink ack type
2022/02/08 14:50 upstream 555f3d7be91a 0b33604d .config console log report info ci-upstream-kasan-gce SYZFAIL: netlink_send_ext: bad netlink ack type
2022/02/03 14:45 upstream 88808fbbead4 4ebb2798 .config console log report info ci-upstream-kasan-gce-smack-root SYZFAIL: netlink_send_ext: bad netlink ack type
2022/02/03 10:58 upstream 27bb0b18c208 4ebb2798 .config console log report info ci-upstream-kasan-gce SYZFAIL: netlink_send_ext: bad netlink ack type
2022/02/03 08:57 upstream 27bb0b18c208 4ebb2798 .config console log report info ci-upstream-kasan-gce SYZFAIL: netlink_send_ext: bad netlink ack type
2022/01/26 01:07 upstream 0280e3c58f92 2cbffd88 .config console log report info ci-upstream-kasan-gce-selinux-root SYZFAIL: netlink_send_ext: bad netlink ack type
2022/01/18 12:36 upstream e3a8b6a1e70c 731a2d23 .config console log report info ci-upstream-kasan-gce-selinux-root SYZFAIL: netlink_send_ext: bad netlink ack type
2022/01/15 09:14 upstream 112450df61b7 723cfaf0 .config console log report info ci-upstream-kasan-gce-selinux-root SYZFAIL: netlink_send_ext: bad netlink ack type
2022/01/13 12:41 upstream f079ab01b560 44d1319a .config console log report info ci-upstream-kasan-gce SYZFAIL: netlink_send_ext: bad netlink ack type
2022/01/12 17:38 upstream daadb3bd0e8d 44d1319a .config console log report info ci-upstream-kasan-gce SYZFAIL: netlink_send_ext: bad netlink ack type
2022/01/12 02:44 upstream 6f38be8f2ccd 44d1319a .config console log report info ci-upstream-kasan-gce SYZFAIL: netlink_send_ext: bad netlink ack type
2022/01/11 16:30 upstream fe8152b38d3a 1884f55a .config console log report info ci-upstream-kasan-gce-smack-root SYZFAIL: netlink_send_ext: bad netlink ack type
2022/01/11 04:41 upstream 133d9c53c9dc ddb0ab8c .config console log report info ci-qemu-upstream SYZFAIL: netlink_send_ext: bad netlink ack type
2022/01/11 01:09 upstream 133d9c53c9dc ddb0ab8c .config console log report info ci-qemu-upstream SYZFAIL: netlink_send_ext: bad netlink ack type
2022/01/09 08:03 upstream 21f35d2ca83e 2ca0d385 .config console log report info ci-upstream-kasan-gce SYZFAIL: netlink_send_ext: bad netlink ack type
2022/01/06 18:26 upstream 75acfdb6fd92 6acc789a .config console log report info ci-upstream-kasan-gce-selinux-root SYZFAIL: netlink_send_ext: bad netlink ack type
2022/01/01 00:34 upstream 4f3d93c6eaff e1768e9c .config console log report info ci-upstream-kasan-gce SYZFAIL: netlink_send_ext: bad netlink ack type
2021/12/28 21:59 upstream ecf71de775a0 76c8cf06 .config console log report info ci-upstream-kasan-gce-selinux-root SYZFAIL: netlink_send_ext: bad netlink ack type
2021/12/26 00:07 upstream e2ae0d4a6b0b 6caa12e4 .config console log report info ci-upstream-kasan-gce SYZFAIL: netlink_send_ext: bad netlink ack type
2021/12/20 01:34 upstream a76c3d035872 44068e19 .config console log report info ci-upstream-kasan-gce-selinux-root SYZFAIL: netlink_send_ext: bad netlink ack type
2021/12/10 21:03 upstream b8a98b6bf66a 49ca1f59 .config console log report info ci-upstream-kasan-gce SYZFAIL: netlink_send_ext: bad netlink ack type
2021/11/30 07:48 upstream d58071a8a76d d0830353 .config console log report info ci-upstream-kasan-gce-smack-root SYZFAIL: netlink_send_ext: bad netlink ack type
2021/11/29 18:14 upstream d58071a8a76d d0830353 .config console log report info ci-upstream-kasan-gce-root SYZFAIL: netlink_send_ext: bad netlink ack type
2021/11/27 07:59 upstream c5c17547b778 63eeac02 .config console log report info ci-upstream-kasan-gce-selinux-root SYZFAIL: netlink_send_ext: bad netlink ack type
2021/11/26 23:37 upstream c5c17547b778 63eeac02 .config console log report info ci-upstream-kasan-gce-smack-root SYZFAIL: netlink_send_ext: bad netlink ack type
2021/11/26 18:42 upstream a4849f6000e2 63eeac02 .config console log report info ci-upstream-kasan-gce SYZFAIL: netlink_send_ext: bad netlink ack type
2021/11/26 14:11 upstream a4849f6000e2 63eeac02 .config console log report info ci-upstream-kasan-gce SYZFAIL: netlink_send_ext: bad netlink ack type
2022/04/16 18:27 upstream 59250f8a7f3a 8bcc32a6 .config console log report info ci-upstream-kasan-gce-386 SYZFAIL: netlink_send_ext: bad netlink ack type
2022/03/06 19:13 upstream dcde98da9970 7bdd8b2c .config console log report info ci-upstream-kasan-gce-386 SYZFAIL: netlink_send_ext: bad netlink ack type
2022/02/24 07:52 upstream 23d04328444a 6e821dbf .config console log report info ci-qemu2-arm64-mte SYZFAIL: netlink_send_ext: bad netlink ack type
2022/02/13 13:54 upstream b81b1829e7e3 8b9ca619 .config console log report info ci-qemu2-arm64-mte SYZFAIL: netlink_send_ext: bad netlink ack type
2022/02/01 08:01 upstream 26291c54e111 6b7c57fe .config console log report info ci-upstream-kasan-gce-386 SYZFAIL: netlink_send_ext: bad netlink ack type
2022/01/12 09:50 upstream 6f38be8f2ccd 44d1319a .config console log report info ci-upstream-kasan-gce-386 SYZFAIL: netlink_send_ext: bad netlink ack type
2021/12/14 02:21 upstream 5472f14a3742 5d14b1ea .config console log report info ci-upstream-kasan-gce-386 SYZFAIL: netlink_send_ext: bad netlink ack type
2021/12/12 04:12 upstream 6f513529296f 49ca1f59 .config console log report info ci-qemu-upstream-386 SYZFAIL: netlink_send_ext: bad netlink ack type
2021/12/03 21:37 upstream 5f58da2befa5 c7c20675 .config console log report info ci-qemu-upstream-386 SYZFAIL: netlink_send_ext: bad netlink ack type
2021/11/28 00:00 upstream 741392771338 63eeac02 .config console log report info ci-qemu-upstream-386 SYZFAIL: netlink_send_ext: bad netlink ack type
2021/03/09 01:17 upstream 144c79ef3353 09fbf400 .config console log report info ci-qemu2-arm64-compat SYZFAIL: netlink_send_ext: bad netlink ack type
2021/03/08 13:05 upstream 144c79ef3353 09fbf400 .config console log report info ci-qemu2-arm64 SYZFAIL: netlink_send_ext: bad netlink ack type
2023/06/11 04:10 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci d8b213732169 7086cdb9 .config console log report syz [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 SYZFAIL: netlink_send_ext: bad netlink ack type
2021/12/13 17:20 linux-next ea922272cbe5 49ca1f59 .config console log report info ci-upstream-linux-next-kasan-gce-root SYZFAIL: netlink_send_ext: bad netlink ack type
* Struck through repros no longer work on HEAD.