WARNING in mac80211_hwsim_tx (2)

Status: upstream: reported C repro on 2026/05/10 21:02
Subsystems: wireless
Labels: prio:normal
[Documentation on labels]
Reported-by: syzbot+435fdb053cf98bfa5778@syzkaller.appspotmail.com
Fix commit: e14bf37bb2b3 wifi: mac80211: don't allow injecting frames wider than the chanctx
Patched on: [ci-qemu-gce-upstream-auto ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-snapshot-upstream-root ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-arm64 ci-upstream-gce-leak ci-upstream-kasan-badwrites-root ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci-upstream-rust-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce], missing on: [ci-qemu-native-arm64-kvm ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-qemu2-riscv64 ci-upstream-kmsan-gce-386-root ci-upstream-kmsan-gce-root ci2-upstream-usb]
First crash: 145d, last: 6h35m
Cause bisection: failed (error log, bisect log)
  
▶ ▼ ✨ AI Jobs (3)
ID Workflow Result Correct Bug Created Started Finished Revision
3b151767 assessment-security DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ✅ VMGuestTrigger: ❌ VMHostTrigger: ❌ ❓ WARNING in mac80211_hwsim_tx (2) 2026/05/31 05:08 2026/05/31 05:08 2026/05/31 06:07 6b4a8443
5d15ab96 repro-c Reproduced: ✅ ❓ WARNING in mac80211_hwsim_tx (2) 2026/05/25 10:25 2026/05/25 10:49 2026/05/25 14:06 c69befb3
a30b0016 assessment-security 💥 WARNING in mac80211_hwsim_tx (2) 2026/05/14 14:11 2026/05/14 14:11 2026/05/14 14:12 6ccb967e
▶ ▼ Discussions (6)
Title Replies (including bot) Last reply
[PATCH RESEND wireless 01/10] wifi: mac80211: don't allow injecting frames wider than the chanctx 1 (1) 2026/09/08 12:28
[PATCH wireless 01/10] wifi: mac80211: don't allow injecting frames wider than the chanctx 1 (1) 2026/09/04 14:58
[PATCH] wifi: mac80211_hwsim: drop frames with invalid channel width 2 (2) 2026/08/03 06:13
[PATCH wireless v2] wifi: mac80211_hwsim: drop frames with invalid channel width 1 (1) 2026/08/02 18:36
[syzbot] [wireless?] WARNING in mac80211_hwsim_tx (2) 0 (3) 2026/08/02 10:35
[syzbot] Monthly wireless report (Jul 2026) 0 (1) 2026/07/04 04:32
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 WARNING in mac80211_hwsim_tx -1 1 122d 122d 0/3 auto-obsoleted due to no activity on 2026/09/06 17:05
upstream WARNING in mac80211_hwsim_tx wireless -1 44 548d 650d 0/29 auto-obsoleted due to no activity on 2025/06/07 07:17
▶ ▼ Last patch testing requests (6)
Created Duration User Patch Repo Result
2026/08/16 09:27 21m retest repro net-next report job log log
2026/08/16 09:27 26m retest repro net report job log log
2026/08/16 09:27 22m retest repro git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci report job log log
2026/08/02 10:35 25m lurenjia534@outlook.com patch https://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless.git main OK log
2026/07/28 12:37 21m retest repro upstream error
2026/07/28 12:36 19m retest repro upstream report log

Sample crash report:
hwsim_get_chanwidth(bw) > hwsim_get_chanwidth(confbw)
WARNING: drivers/net/wireless/virtual/mac80211_hwsim_main.c:2248 at mac80211_hwsim_tx+0x16fe/0x26d0 drivers/net/wireless/virtual/mac80211_hwsim_main.c:2248, CPU#2: syz.0.17/5957
Modules linked in:
CPU: 2 UID: 0 PID: 5957 Comm: syz.0.17 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
RIP: 0010:mac80211_hwsim_tx+0x16fe/0x26d0 drivers/net/wireless/virtual/mac80211_hwsim_main.c:2248
Code: 03 80 3c 02 00 0f 85 cc 0d 00 00 49 8b 86 08 38 00 00 c7 44 24 18 00 00 00 00 48 89 44 24 38 e9 d6 eb ff ff e8 33 b1 b4 fa 90 <0f> 0b 90 e9 dd f0 ff ff e8 25 b1 b4 fa 90 0f 0b 90 48 8b 3c 24 4c
RSP: 0018:ffffc9000347f2d0 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88803e8bf6b0 RCX: ffffffff87550f5c
RDX: ffff888022a9ca80 RSI: ffffffff87551f2d RDI: ffff888022a9ca80
RBP: 0000000000000014 R08: 0000000000000004 R09: 0000000000000014
R10: 00000000000000a0 R11: 0000000000000000 R12: 0000000000000000
R13: dffffc0000000000 R14: 00000000000000a0 R15: 0000000000000000
FS:  0000555583016500(0000) GS:ffff8880d5fea000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000002280 CR3: 0000000035a5a000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 drv_tx net/mac80211/driver-ops.h:38 [inline]
 ieee80211_tx_frags+0x5c9/0xa70 net/mac80211/tx.c:1746
 __ieee80211_tx+0x145/0x5b0 net/mac80211/tx.c:1801
 ieee80211_tx+0x336/0x460 net/mac80211/tx.c:1984
 ieee80211_xmit+0x30f/0x3e0 net/mac80211/tx.c:2076
 ieee80211_monitor_start_xmit+0xf09/0x12b0 net/mac80211/tx.c:2479
 __netdev_start_xmit include/linux/netdevice.h:5400 [inline]
 netdev_start_xmit include/linux/netdevice.h:5409 [inline]
 xmit_one net/core/dev.c:3889 [inline]
 dev_hard_start_xmit+0x121/0x760 net/core/dev.c:3905
 __dev_queue_xmit+0x1b9d/0x4940 net/core/dev.c:4872
 dev_queue_xmit include/linux/netdevice.h:3446 [inline]
 packet_xmit+0x243/0x310 net/packet/af_packet.c:276
 packet_snd net/packet/af_packet.c:3082 [inline]
 packet_sendmsg+0x319a/0x5100 net/packet/af_packet.c:3114
 sock_sendmsg_nosec net/socket.c:775 [inline]
 __sock_sendmsg net/socket.c:790 [inline]
 __sys_sendto+0x48b/0x4e0 net/socket.c:2252
 __do_sys_sendto net/socket.c:2259 [inline]
 __se_sys_sendto net/socket.c:2255 [inline]
 __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2255
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd89039de59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffed49cd888 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007fd890625fa0 RCX: 00007fd89039de59
RDX: 0000000000000030 RSI: 0000200000000640 RDI: 0000000000000008
RBP: 00007fd890433e6f R08: 0000200000000380 R09: 0000000000000014
R10: 0000000004000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd890625fac R14: 00007fd890625fa0 R15: 00007fd890625fa0
 </TASK>

Crashes (87):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/07/11 23:59 upstream dd3210c47e8d d78ea535 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in mac80211_hwsim_tx
2026/06/30 19:33 upstream dc59e4fea9d8 e5173a01 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mac80211_hwsim_tx
2026/06/30 21:14 net 2a00517db8de 00e8b0fd .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in mac80211_hwsim_tx
2026/07/04 04:08 net-next 6fb33632323a fcece630 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in mac80211_hwsim_tx
2026/06/30 20:45 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci ff4c5a0de1f2 00e8b0fd .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in mac80211_hwsim_tx
2026/09/24 04:12 upstream 62f4c998b297 0a1606bc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in mac80211_hwsim_tx
2026/09/23 23:22 upstream fe2ec83746e5 0a1606bc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in mac80211_hwsim_tx
2026/09/23 21:41 upstream fe2ec83746e5 0a1606bc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in mac80211_hwsim_tx
2026/09/23 10:50 upstream fe2ec83746e5 abce1216 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in mac80211_hwsim_tx
2026/07/14 12:19 upstream 0f26556c5eee 2130f682 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in mac80211_hwsim_tx
2026/07/14 12:19 upstream 0f26556c5eee 2130f682 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in mac80211_hwsim_tx
2026/07/14 12:18 upstream 0f26556c5eee 2130f682 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in mac80211_hwsim_tx
2026/05/29 14:06 upstream 8fde5d1d47f6 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce WARNING in mac80211_hwsim_tx
2026/05/06 20:58 upstream adc1e5c6203c cbcd9ea0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root WARNING in mac80211_hwsim_tx
2026/09/22 23:51 upstream 50d05c7c76c9 3e2106e5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in mac80211_hwsim_tx
2026/09/01 17:21 upstream 786262be6048 316d9396 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in mac80211_hwsim_tx
2026/07/14 12:27 upstream 0f26556c5eee 2130f682 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in mac80211_hwsim_tx
2026/07/14 12:24 upstream 0f26556c5eee 2130f682 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in mac80211_hwsim_tx
2026/07/14 12:24 upstream 0f26556c5eee 2130f682 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in mac80211_hwsim_tx
2026/07/14 12:19 upstream 0f26556c5eee 2130f682 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in mac80211_hwsim_tx
2026/05/29 16:21 upstream 8fde5d1d47f6 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-386 WARNING in mac80211_hwsim_tx
2026/09/28 02:56 upstream d266640c6c76 a3c7249d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in mac80211_hwsim_tx
2026/09/26 14:35 upstream f14572c203d5 a3c7249d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in mac80211_hwsim_tx
2026/09/26 05:54 upstream f14572c203d5 a3c7249d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in mac80211_hwsim_tx
2026/09/25 03:31 upstream 5fc5768c7ca9 27d05fb3 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in mac80211_hwsim_tx
2026/09/25 02:12 upstream 5fc5768c7ca9 27d05fb3 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in mac80211_hwsim_tx
2026/09/24 17:09 upstream 62f4c998b297 3c3cdf19 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in mac80211_hwsim_tx
2026/09/24 10:54 upstream 62f4c998b297 3c3cdf19 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in mac80211_hwsim_tx
2026/09/24 05:36 upstream 62f4c998b297 3c3cdf19 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in mac80211_hwsim_tx
2026/09/24 01:25 upstream 62f4c998b297 0a1606bc .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in mac80211_hwsim_tx
2026/09/23 15:51 upstream fe2ec83746e5 abce1216 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream WARNING in mac80211_hwsim_tx
2026/08/25 20:03 upstream 818bebeb63dd a9a1fc32 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mac80211_hwsim_tx
2026/07/09 05:31 upstream 0e35b9b6ec0f b9f1ceaa .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mac80211_hwsim_tx
2026/06/30 17:41 upstream dc59e4fea9d8 e5173a01 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mac80211_hwsim_tx
2026/06/19 01:46 upstream 83f1454877cc d7ffd47b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in mac80211_hwsim_tx
2026/05/29 12:41 upstream 8fde5d1d47f6 6b4a8443 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 WARNING in mac80211_hwsim_tx
2026/09/24 02:48 net 9c572a83037a 0a1606bc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-this-kasan-gce WARNING in mac80211_hwsim_tx
2026/09/27 11:28 net-next 014d795c7383 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in mac80211_hwsim_tx
2026/09/27 08:54 net-next 014d795c7383 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in mac80211_hwsim_tx
2026/09/27 06:46 net-next 014d795c7383 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in mac80211_hwsim_tx
2026/09/23 09:38 net-next 944ae66642b7 abce1216 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in mac80211_hwsim_tx
2026/09/23 08:55 net-next 944ae66642b7 abce1216 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in mac80211_hwsim_tx
2026/09/23 08:52 net-next 944ae66642b7 abce1216 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in mac80211_hwsim_tx
2026/09/23 08:46 net-next 944ae66642b7 abce1216 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in mac80211_hwsim_tx
2026/09/23 08:39 net-next 944ae66642b7 abce1216 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in mac80211_hwsim_tx
2026/09/23 03:10 net-next eabc76156e86 3e2106e5 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in mac80211_hwsim_tx
2026/05/29 14:29 net-next 841559836550 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in mac80211_hwsim_tx
2026/05/29 14:29 net-next 841559836550 6b4a8443 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in mac80211_hwsim_tx
2026/09/28 19:58 linux-next 6375e61c01e9 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in mac80211_hwsim_tx
2026/09/28 11:53 linux-next f5f84daefcd9 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in mac80211_hwsim_tx
2026/09/26 09:38 linux-next f5f84daefcd9 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root WARNING in mac80211_hwsim_tx
2026/09/26 03:56 linux-next f5f84daefcd9 f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in mac80211_hwsim_tx
2026/09/28 13:25 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci e8e60d3ddd25 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in mac80211_hwsim_tx
2026/09/28 09:03 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci e8e60d3ddd25 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in mac80211_hwsim_tx
2026/09/28 08:23 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci e8e60d3ddd25 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in mac80211_hwsim_tx
2026/09/28 00:59 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci e8e60d3ddd25 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in mac80211_hwsim_tx
2026/09/26 22:01 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci e8e60d3ddd25 a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in mac80211_hwsim_tx
2026/09/25 22:38 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci e8e60d3ddd25 f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in mac80211_hwsim_tx
2026/09/25 18:45 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci e8e60d3ddd25 f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in mac80211_hwsim_tx
2026/09/24 19:13 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 7dc79bb50ab6 3c3cdf19 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in mac80211_hwsim_tx
2026/07/14 12:20 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci a13c140cc289 2130f682 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in mac80211_hwsim_tx
2026/07/14 12:20 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci a13c140cc289 2130f682 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 WARNING in mac80211_hwsim_tx
* Struck through repros no longer work on HEAD.