syzbot


WARNING in ieee80211_ocb_rx_no_sta

Status: upstream: reported on 2025/11/26 18:19
Reported-by: syzbot+d8e4b8832a9cad004b9f@syzkaller.appspotmail.com
First crash: 1d15h, last: 1d15h
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 129d 125d 0/29 auto-obsoleted due to no activity on 2025/10/29 18:19
upstream WARNING in ieee80211_ocb_rx_no_sta (2) wireless -1 C 7 3d01h 4d07h 0/29 upstream: reported C repro on 2025/11/24 02:14

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4317 at net/mac80211/ocb.c:64 ieee80211_ocb_rx_no_sta+0x574/0x650 net/mac80211/ocb.c:64
Modules linked in:
CPU: 1 PID: 4317 Comm: kworker/1:5 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Workqueue: mld mld_ifc_work
RIP: 0010:ieee80211_ocb_rx_no_sta+0x574/0x650 net/mac80211/ocb.c:64
Code: c3 40 09 00 00 48 c7 c7 40 7f a7 8b 48 89 de 4c 89 fa 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d e9 81 84 61 00 e8 2c 95 d5 f7 <0f> 0b 48 83 c4 10 5b 41 5c 41 5d 41 5e 41 5f 5d e9 c7 00 00 00 44
RSP: 0018:ffffc900001e0838 EFLAGS: 00010246
RAX: ffffffff89ab4134 RBX: ffff888057b10c80 RCX: ffff888018691dc0
RDX: 0000000000000100 RSI: 0000000000000001 RDI: 0000000000000000
RBP: 0000000000000000 R08: dffffc0000000000 R09: fffffbfff215c449
R10: fffffbfff215c449 R11: 1ffffffff215c448 R12: ffffffff89ab3c67
R13: ffff88802ef70e80 R14: 0000000000000001 R15: ffff888054e8f03a
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2f91dff8 CR3: 00000000186d0000 CR4: 00000000003526e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 ieee80211_accept_frame net/mac80211/rx.c:4349 [inline]
 ieee80211_prepare_and_rx_handle+0x3d8d/0x6240 net/mac80211/rx.c:4877
 __ieee80211_rx_handle_packet net/mac80211/rx.c:5180 [inline]
 ieee80211_rx_list+0x24d8/0x2d00 net/mac80211/rx.c:5306
 ieee80211_rx_napi+0x1a6/0x3c0 net/mac80211/rx.c:5329
 ieee80211_rx include/net/mac80211.h:4846 [inline]
 ieee80211_handle_queued_frames+0x105/0x1b0 net/mac80211/main.c:317
 tasklet_action_common+0x298/0x400 kernel/softirq.c:826
 handle_softirqs+0x2a1/0x920 kernel/softirq.c:596
 do_softirq+0x13b/0x200 kernel/softirq.c:497
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x174/0x1b0 kernel/softirq.c:421
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:861 [inline]
 __dev_queue_xmit+0x15c9/0x3760 net/core/dev.c:4373
 neigh_output include/net/neighbour.h:545 [inline]
 ip6_finish_output2+0xda2/0x1590 net/ipv6/ip6_output.c:138
 dst_output include/net/dst.h:453 [inline]
 NF_HOOK+0x15d/0x460 include/linux/netfilter.h:302
 mld_sendpack+0x893/0xe80 net/ipv6/mcast.c:1825
 mld_send_cr net/ipv6/mcast.c:2126 [inline]
 mld_ifc_work+0x836/0xb40 net/ipv6/mcast.c:2658
 process_one_work+0x898/0x1160 kernel/workqueue.c:2292
 worker_thread+0xaa2/0x1250 kernel/workqueue.c:2439
 kthread+0x29d/0x330 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/11/26 18:18 linux-6.1.y f6e38ae624cf d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_ocb_rx_no_sta
* Struck through repros no longer work on HEAD.