WARNING in ieee80211_set_active_links (3)

Status: upstream: reported C repro on 2026/02/26 03:22
Subsystems: wireless
Labels: prio:low
[Documentation on labels]
Reported-by: syzbot+582469b3a9ef5f13606b@syzkaller.appspotmail.com
First crash: 194d, last: 1d08h
✨ AI Jobs (2)
ID Workflow Result Correct Bug Created Started Finished Revision
18a00910 repro-c Reproduced: ✅ WARNING in ieee80211_set_active_links (3) 2026/08/13 11:32 2026/08/13 18:03 2026/08/13 19:21 0165196a
f85d9976 assessment-security DenialOfService: ❌ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌ WARNING in ieee80211_set_active_links (3) 2026/05/25 15:35 2026/05/25 15:35 2026/05/25 16:22 c69befb3
Discussions (2)
Title Replies (including bot) Last reply
[PATCH wireless 04/10] wifi: mac80211: don't allow link changes when iface is down 1 (1) 2026/09/04 14:58
[syzbot] [wireless?] WARNING in ieee80211_set_active_links (3) 0 (2) 2026/08/13 21:05
Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in ieee80211_set_active_links wireless -1 syz, C 2 595d 613d 28/29 fixed on 2025/05/06 15:33
upstream WARNING in ieee80211_set_active_links (2) wireless -1 1 375d 371d 0/29 auto-obsoleted due to no activity on 2025/12/03 02:32
Last patch testing requests (1)
Created Duration User Patch Repo Result
2026/08/13 20:02 20m nogikh@google.com upstream report job log log

Sample crash report:
------------[ cut here ]------------
sta0: Failed check-sdata-in-driver check, flags: 0x0
WARNING: net/mac80211/driver-ops.h:1723 at drv_can_activate_links net/mac80211/driver-ops.h:1723 [inline], CPU#0: kworker/u33:4/93
WARNING: net/mac80211/driver-ops.h:1723 at ieee80211_set_active_links+0x2d0/0x970 net/mac80211/link.c:651, CPU#0: kworker/u33:4/93
Modules linked in:
CPU: 0 UID: 0 PID: 93 Comm: kworker/u33:4 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:drv_can_activate_links net/mac80211/driver-ops.h:1723 [inline]
RIP: 0010:ieee80211_set_active_links+0x2d7/0x970 net/mac80211/link.c:651
Code: 05 00 00 e8 5b de da f6 48 8b 34 24 48 81 c6 20 01 00 00 48 89 34 24 e8 47 de da f6 48 8d 3d e0 87 03 06 48 8b 34 24 44 89 fa <67> 48 0f b9 3a e9 e0 fe ff ff e8 2a de da f6 0f b7 c5 4c 8d bb 50
RSP: 0018:ffffc9000165faf8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff888038876c70 RCX: ffffffff8b2f94de
RDX: 0000000000000000 RSI: ffff888038874120 RDI: ffffffff91331d20
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888038875928
R13: 0000000000000000 R14: ffff888101a90f40 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880d5de9000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562bad7c5000 CR3: 000000000e994000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ieee80211_if_parse_active_links+0xbb/0x120 net/mac80211/debugfs_netdev.c:732
 wiphy_locked_debugfs_write_work+0xe6/0x1c0 net/wireless/debugfs.c:248
 cfg80211_wiphy_work+0x2b7/0x550 net/wireless/core.c:538
 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322
 process_scheduled_works kernel/workqueue.c:3405 [inline]
 worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486
 kthread+0x370/0x450 kernel/kthread.c:436
 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	00 00                	add    %al,(%rax)
   2:	e8 5b de da f6       	call   0xf6dade62
   7:	48 8b 34 24          	mov    (%rsp),%rsi
   b:	48 81 c6 20 01 00 00 	add    $0x120,%rsi
  12:	48 89 34 24          	mov    %rsi,(%rsp)
  16:	e8 47 de da f6       	call   0xf6dade62
  1b:	48 8d 3d e0 87 03 06 	lea    0x60387e0(%rip),%rdi        # 0x6038802
  22:	48 8b 34 24          	mov    (%rsp),%rsi
  26:	44 89 fa             	mov    %r15d,%edx
* 29:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2e:	e9 e0 fe ff ff       	jmp    0xffffff13
  33:	e8 2a de da f6       	call   0xf6dade62
  38:	0f b7 c5             	movzwl %bp,%eax
  3b:	4c                   	rex.WR
  3c:	8d                   	.byte 0x8d
  3d:	bb                   	.byte 0xbb
  3e:	50                   	push   %rax

Crashes (148):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/13 21:04 upstream 3aa1dcaa4f6f 4a865b71 .config console log report C ci-qemu-upstream WARNING in ieee80211_set_active_links
2026/09/03 14:00 upstream 940de590b839 6a988719 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root WARNING in ieee80211_set_active_links
2026/08/27 10:00 upstream 502d45774af0 a2b77b9e .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in ieee80211_set_active_links
2026/08/19 00:55 upstream 0f23d56f17fd 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs WARNING in ieee80211_set_active_links
2026/08/17 19:06 upstream 8d3ae59288f1 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-badwrites-root WARNING in ieee80211_set_active_links
2026/08/17 16:08 upstream 8d3ae59288f1 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in ieee80211_set_active_links
2026/07/23 22:06 upstream 4539944e5151 4a865b71 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in ieee80211_set_active_links
2026/07/23 04:55 upstream 4539944e5151 4a865b71 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in ieee80211_set_active_links
2026/05/15 06:02 upstream 66182ca873a4 6ccb967e .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in ieee80211_set_active_links
2026/02/25 02:50 upstream 7dff99b35460 787dfb7c .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in ieee80211_set_active_links
2026/02/22 03:18 upstream d79526b89571 6e7b5511 .config console log report info [disk image] [vmlinux] [kernel image] ci-qemu-gce-upstream-auto WARNING in ieee80211_set_active_links
2026/08/20 05:36 upstream a4ff2be345d0 1e72964b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in ieee80211_set_active_links
2026/08/20 02:54 upstream bd5f485f3f02 1e72964b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in ieee80211_set_active_links
2026/08/19 23:46 upstream bd5f485f3f02 1e72964b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in ieee80211_set_active_links
2026/08/19 21:10 upstream bd5f485f3f02 1e72964b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in ieee80211_set_active_links
2026/08/19 19:56 upstream bd5f485f3f02 1e72964b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in ieee80211_set_active_links
2026/08/19 18:55 upstream bd5f485f3f02 1e72964b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in ieee80211_set_active_links
2026/08/19 13:14 upstream b126f6f5940f 1e72964b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in ieee80211_set_active_links
2026/08/19 12:02 upstream b126f6f5940f 1e72964b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in ieee80211_set_active_links
2026/08/27 11:36 upstream 73e3f0710014 c53a1b9c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in ieee80211_set_active_links
2026/08/17 15:50 upstream 8d3ae59288f1 905244d6 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in ieee80211_set_active_links
2026/08/25 05:11 linux-next 4b18edbd8e70 23caa175 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in ieee80211_set_active_links
2026/08/24 14:41 linux-next 903c1cf6dff9 23caa175 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in ieee80211_set_active_links
2026/08/24 11:18 linux-next 903c1cf6dff9 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in ieee80211_set_active_links
2026/08/23 20:53 linux-next 903c1cf6dff9 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in ieee80211_set_active_links
2026/08/23 17:13 linux-next 903c1cf6dff9 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in ieee80211_set_active_links
2026/08/23 14:45 linux-next 903c1cf6dff9 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in ieee80211_set_active_links
2026/08/23 05:15 linux-next 903c1cf6dff9 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in ieee80211_set_active_links
2026/08/22 15:28 linux-next 903c1cf6dff9 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in ieee80211_set_active_links
2026/08/22 03:11 linux-next 903c1cf6dff9 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in ieee80211_set_active_links
2026/08/20 20:54 linux-next 7079a12d7506 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in ieee80211_set_active_links
2026/08/20 10:10 linux-next 6a746cd265ae 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in ieee80211_set_active_links
2026/08/19 22:12 linux-next 6a746cd265ae 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in ieee80211_set_active_links
2026/08/19 17:42 linux-next 6a746cd265ae 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in ieee80211_set_active_links
2026/08/25 10:33 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 68f892e99df9 614e416a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in ieee80211_set_active_links
2026/08/25 07:23 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 68f892e99df9 23caa175 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in ieee80211_set_active_links
2026/08/25 01:13 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 68f892e99df9 23caa175 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in ieee80211_set_active_links
2026/08/24 18:52 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 68f892e99df9 23caa175 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in ieee80211_set_active_links
2026/08/24 07:40 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 21d6ac051080 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in ieee80211_set_active_links
2026/08/24 06:29 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 21d6ac051080 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in ieee80211_set_active_links
2026/08/24 03:27 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 21d6ac051080 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in ieee80211_set_active_links
2026/08/23 19:08 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 21d6ac051080 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in ieee80211_set_active_links
2026/08/23 10:26 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 21d6ac051080 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in ieee80211_set_active_links
2026/08/23 10:08 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 21d6ac051080 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in ieee80211_set_active_links
2026/08/23 06:31 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 21d6ac051080 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in ieee80211_set_active_links
2026/08/23 01:44 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 21d6ac051080 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in ieee80211_set_active_links
2026/08/22 13:59 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 21d6ac051080 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in ieee80211_set_active_links
2026/08/22 09:18 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 21d6ac051080 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in ieee80211_set_active_links
2026/08/22 05:39 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 21d6ac051080 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in ieee80211_set_active_links
2026/08/22 00:48 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 21d6ac051080 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in ieee80211_set_active_links
2026/08/21 23:21 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 21d6ac051080 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in ieee80211_set_active_links
2026/08/21 18:10 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 21d6ac051080 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in ieee80211_set_active_links
2026/08/21 14:34 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 21d6ac051080 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in ieee80211_set_active_links
2026/08/21 13:33 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 21d6ac051080 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in ieee80211_set_active_links
2026/08/20 18:05 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 21d6ac051080 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in ieee80211_set_active_links
2026/08/20 17:01 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 21d6ac051080 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in ieee80211_set_active_links
2026/08/20 04:23 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 21d6ac051080 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in ieee80211_set_active_links
2026/08/19 15:27 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 21d6ac051080 1e72964b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in ieee80211_set_active_links
* Struck through repros no longer work on HEAD.