syzbot


WARNING in ieee80211_encrypt_tx_skb

Status: upstream: reported C repro on 2026/07/12 21:33
Subsystems: wireless
Labels: prio:low
[Documentation on labels]
Reported-by: syzbot+b6ce23950fd636e6efb6@syzkaller.appspotmail.com
First crash: 4d05h, last: 3d19h
✨ AI Jobs (1)
ID Workflow Result Correct Bug Created Started Finished Revision Error
d49b4c59-a598-4ccb-b101-bd2986fd99c9 assessment-security DenialOfService: ❌ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ✅ VMGuestTrigger: ❌ VMHostTrigger: ❌ WARNING in ieee80211_encrypt_tx_skb 2026/07/12 00:00 2026/07/12 00:00 2026/07/12 00:53 d78ea535f456172a095a6d211ee0a2de1d049968

			
		
Discussions (2)
Title Replies (including bot) Last reply
[PATCH] mac80211: don't encrypt pre-auth (ETH_P_PREAUTH) frames 1 (1) 2026/07/13 01:59
[syzbot] [wireless?] WARNING in ieee80211_encrypt_tx_skb 0 (3) 2026/07/13 01:22
Last patch testing requests (2)
Created Duration User Patch Repo Result
2026/07/13 01:22 24m kartikey406@gmail.com patch upstream error
2026/07/13 00:50 25m kartikey406@gmail.com patch upstream error

Sample crash report:
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fb87e825fac R14: 00007fb87e825fa0 R15: 00007fb87e825fa0
 </TASK>
------------[ cut here ]------------
res != TX_CONTINUE
WARNING: net/mac80211/tx.c:5460 at ieee80211_encrypt_tx_skb+0x3e4/0x3f0 net/mac80211/tx.c:5460, CPU#0: syz.0.17/5534
Modules linked in:
CPU: 0 UID: 0 PID: 5534 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:ieee80211_encrypt_tx_skb+0x3e4/0x3f0 net/mac80211/tx.c:5460
Code: ff ff ff e8 9e 1a 7a f6 90 0f 0b 90 e9 0b ff ff ff e8 90 1a 7a f6 90 0f 0b 90 bb ea ff ff ff e9 20 ff ff ff e8 7d 1a 7a f6 90 <0f> 0b 90 eb eb e8 d2 bb 84 00 66 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90003526a20 EFLAGS: 00010293
RAX: ffffffff8b4c6813 RBX: 0000000000000000 RCX: ffff88803a6f0000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90003526b90 R08: ffff8880129723cf R09: 0000000000000000
R10: ffff8880129723c0 R11: ffffed100252e47a R12: ffffc90003526a68
R13: 1ffff920006a4d48 R14: dffffc0000000000 R15: 0000000000000001
FS:  00005555940ec500(0000) GS:ffff88808c54d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000003700 CR3: 0000000012968000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 mac80211_hwsim_tx+0x1de/0x2500 drivers/net/wireless/virtual/mac80211_hwsim_main.c:2116
 ieee80211_hwsim_wake_tx_queue+0xd4/0x150 drivers/net/wireless/virtual/mac80211_hwsim_main.c:2291
 drv_wake_tx_queue net/mac80211/driver-ops.h:1394 [inline]
 schedule_and_wake_txq net/mac80211/driver-ops.h:1401 [inline]
 ieee80211_queue_skb+0x1923/0x22c0 net/mac80211/tx.c:1674
 __ieee80211_xmit_fast+0x8ea/0x2160 net/mac80211/tx.c:3785
 ieee80211_xmit_fast net/mac80211/tx.c:3853 [inline]
 __ieee80211_subif_start_xmit+0x12af/0x1690 net/mac80211/tx.c:4367
 ieee80211_tx_control_port+0xaba/0xcd0 net/mac80211/tx.c:6592
 rdev_tx_control_port net/wireless/rdev-ops.h:783 [inline]
 nl80211_tx_control_port+0x604/0x990 net/wireless/nl80211.c:18403
 genl_family_rcv_msg_doit+0x233/0x340 net/netlink/genetlink.c:1114
 genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline]
 genl_rcv_msg+0x614/0x7a0 net/netlink/genetlink.c:1209
 netlink_rcv_skb+0x226/0x4a0 net/netlink/af_netlink.c:2556
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0x7bb/0x940 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1900
 sock_sendmsg_nosec+0x13a/0x180 net/socket.c:775
 __sock_sendmsg net/socket.c:790 [inline]
 ____sys_sendmsg+0x54e/0x850 net/socket.c:2684
 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2738
 __sys_sendmsg net/socket.c:2770 [inline]
 __do_sys_sendmsg net/socket.c:2775 [inline]
 __se_sys_sendmsg net/socket.c:2773 [inline]
 __x64_sys_sendmsg+0x1b1/0x290 net/socket.c:2773
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb87e59de59
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:00007ffca021cc48 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fb87e825fa0 RCX: 00007fb87e59de59
RDX: 0000000000000800 RSI: 0000200000003700 RDI: 0000000000000003
RBP: 00007ffca021ccb0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007fb87e825fac R14: 00007fb87e825fa0 R15: 00007fb87e825fa0
 </TASK>

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/07/11 15:45 upstream 61c03dfde854 d78ea535 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in ieee80211_encrypt_tx_skb
2026/07/11 11:39 upstream 61c03dfde854 d78ea535 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in ieee80211_encrypt_tx_skb
2026/07/11 06:24 upstream 61c03dfde854 d78ea535 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in ieee80211_encrypt_tx_skb
* Struck through repros no longer work on HEAD.