syzbot


WARNING in ieee80211_ocb_rx_no_sta (2)

Status: upstream: reported C repro on 2025/11/24 02:14
Subsystems: wireless
[Documentation on labels]
Reported-by: syzbot+b364457b2d1d4e4a3054@syzkaller.appspotmail.com
Fix commit: wifi: mac80211: ocb: skip rx_no_sta when interface is not joined
Patched on: [ci-qemu-gce-upstream-auto ci-qemu-native-arm64-kvm ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-snapshot-upstream-root ci-upstream-bpf-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-kmsan-gce-386-root ci-upstream-kmsan-gce-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-qemu2-riscv64 ci-upstream-bpf-next-kasan-gce ci2-upstream-usb]
First crash: 52d, last: 33d
Discussions (4)
Title Replies (including bot) Last reply
[PATCH AUTOSEL 6.18-5.10] wifi: mac80211: ocb: skip rx_no_sta when interface is not joined 1 (1) 2026/01/07 15:53
[PATCH] mac80211: ocb: skip rx_no_sta when interface is not joined 1 (1) 2025/12/16 03:59
Re: [syzbot] [wireless?] WARNING in ieee80211_ocb_rx_no_sta (2) 1 (2) 2025/12/16 03:33
[syzbot] [wireless?] WARNING in ieee80211_ocb_rx_no_sta (2) 0 (1) 2025/11/24 02:14
Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in ieee80211_ocb_rx_no_sta wireless -1 1 173d 169d 0/29 auto-obsoleted due to no activity on 2025/10/29 18:19
linux-6.1 WARNING in ieee80211_ocb_rx_no_sta -1 1 45d 45d 0/3 upstream: reported on 2025/11/26 18:19
Last patch testing requests (7)
Created Duration User Patch Repo Result
2025/12/16 03:12 20m moonhee.lee.ca@gmail.com patch upstream OK log
2025/12/09 08:51 49m retest repro linux-next report log
2025/12/09 08:45 14m retest repro upstream report log
2025/12/09 08:45 14m retest repro upstream report log
2025/12/09 08:45 15m retest repro upstream report log
2025/12/09 08:51 18m retest repro linux-next error
2025/12/09 08:45 14m retest repro upstream report log

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 15 at net/mac80211/ocb.c:63 ieee80211_ocb_rx_no_sta+0x511/0x5d0 net/mac80211/ocb.c:63
Modules linked in:
CPU: 0 UID: 0 PID: 15 Comm: ksoftirqd/0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:ieee80211_ocb_rx_no_sta+0x511/0x5d0 net/mac80211/ocb.c:63
Code: 48 0a 00 00 48 c7 c7 40 88 8a 8c 48 89 de 4c 89 fa 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d e9 85 25 4c f6 e8 00 a7 e4 f6 90 <0f> 0b 90 48 83 c4 18 5b 41 5c 41 5d 41 5e 41 5f 5d e9 b9 00 00 00
RSP: 0018:ffffc9000041f470 EFLAGS: 00010246
RAX: ffffffff8adb6c60 RBX: ffff8880596e0d80 RCX: ffff88801ab1c900
RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8adb6809
R10: 000000000000000c R11: 0000000000000100 R12: ffffffff8adb6809
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff88804464b40a
FS:  0000000000000000(0000) GS:ffff88808d730000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000561f9cf3b950 CR3: 000000004130f000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ieee80211_accept_frame net/mac80211/rx.c:4432 [inline]
 ieee80211_prepare_and_rx_handle+0x2555/0x6770 net/mac80211/rx.c:4994
 __ieee80211_rx_handle_packet net/mac80211/rx.c:5304 [inline]
 ieee80211_rx_list+0x2294/0x2c10 net/mac80211/rx.c:5451
 ieee80211_rx_napi+0x1a8/0x3d0 net/mac80211/rx.c:5474
 ieee80211_rx include/net/mac80211.h:5214 [inline]
 ieee80211_handle_queued_frames+0xe8/0x1f0 net/mac80211/main.c:453
 tasklet_action_common+0x36c/0x580 kernel/softirq.c:925
 handle_softirqs+0x286/0x870 kernel/softirq.c:622
 run_ksoftirqd+0x9b/0x100 kernel/softirq.c:1063
 smpboot_thread_fn+0x542/0xa60 kernel/smpboot.c:160
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Crashes (7):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/11/20 08:07 upstream 23cb64fb7625 26ee5237 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in ieee80211_ocb_rx_no_sta
2025/11/20 06:54 upstream 23cb64fb7625 26ee5237 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in ieee80211_ocb_rx_no_sta
2025/11/20 05:37 upstream 23cb64fb7625 26ee5237 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in ieee80211_ocb_rx_no_sta
2025/11/20 03:54 upstream 23cb64fb7625 26ee5237 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in ieee80211_ocb_rx_no_sta
2025/11/25 08:38 linux-next 422f3140bbcb 64219f15 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in ieee80211_ocb_rx_no_sta
2025/11/25 04:54 linux-next 422f3140bbcb 64219f15 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-rust-kasan-gce WARNING in ieee80211_ocb_rx_no_sta
2025/11/20 02:02 upstream 23cb64fb7625 26ee5237 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root WARNING in ieee80211_ocb_rx_no_sta
* Struck through repros no longer work on HEAD.