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WARNING in ieee80211_ibss_csa_beacon (3)

Status: upstream: reported on 2025/07/26 04:50
Reported-by: syzbot+a39e6103721cc1109d3d@syzkaller.appspotmail.com
First crash: 212d, last: 1d08h
▶ ▼ Similar bugs (10)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in ieee80211_ibss_csa_beacon wireless -1 C error 4997 1095d 1964d 22/29 fixed on 2023/02/24 13:50
linux-6.6 WARNING in ieee80211_ibss_csa_beacon -1 1 243d 243d 0/2 auto-obsoleted due to no activity on 2025/10/03 10:51
linux-6.6 WARNING in ieee80211_ibss_csa_beacon (2) -1 2 13d 86d 0/2 upstream: reported on 2025/11/29 13:51
linux-6.1 WARNING in ieee80211_ibss_csa_beacon (2) -1 9 9d22h 97d 0/3 upstream: reported on 2025/11/18 07:37
linux-4.19 WARNING in ieee80211_ibss_csa_beacon -1 C error 1037 1084d 1919d 0/1 upstream: reported C repro on 2020/11/22 05:50
linux-4.14 WARNING in ieee80211_ibss_csa_beacon -1 C 1 1101d 1932d 0/1 upstream: reported C repro on 2020/11/08 18:28
linux-5.15 WARNING in ieee80211_ibss_csa_beacon -1 504 472d 1082d 0/3 auto-obsoleted due to no activity on 2025/01/17 15:26
linux-5.15 WARNING in ieee80211_ibss_csa_beacon (2) -1 15 312d 396d 0/3 auto-obsoleted due to no activity on 2025/07/10 03:17
upstream WARNING in ieee80211_ibss_csa_beacon (2) wireless -1 2892 757d 1091d 0/29 auto-obsoleted due to no activity on 2024/04/07 10:40
linux-6.1 WARNING in ieee80211_ibss_csa_beacon -1 318 197d 1083d 0/3 auto-obsoleted due to no activity on 2025/10/18 20:45

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 9 at net/mac80211/ibss.c:503 ieee80211_ibss_csa_beacon+0x544/0x620 net/mac80211/ibss.c:503
Modules linked in:
CPU: 0 PID: 9 Comm: kworker/u4:0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: phy14 ieee80211_csa_finalize_work
RIP: 0010:ieee80211_ibss_csa_beacon+0x544/0x620 net/mac80211/ibss.c:503
Code: f8 c6 05 35 c2 30 04 01 48 c7 c7 b0 46 39 8b be 01 02 00 00 48 c7 c2 40 47 39 8b e8 f6 e8 6b 00 e9 62 fe ff ff e8 fc b3 33 f8 <0f> 0b b8 ea ff ff ff e9 7a ff ff ff e8 eb b3 33 f8 0f 0b e9 23 fb
RSP: 0018:ffffc90000ce7b50 EFLAGS: 00010293
RAX: ffffffff89456e44 RBX: ffff888079995ad8 RCX: ffff88813fe90000
RDX: 0000000000000000 RSI: ffffffff8a2b2780 RDI: ffffffff8a79f800
RBP: dffffc0000000000 R08: ffffffff901d318f R09: 1ffffffff203a631
R10: dffffc0000000000 R11: fffffbfff203a632 R12: ffff888079995288
R13: ffff88805f350660 R14: ffff888079994c80 R15: 1ffff1100f332a51
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32518ff8 CR3: 000000007323e000 CR4: 00000000003526f0
DR0: 0000000000030000 DR1: 0000000000000002 DR2: 0000000000000000
DR3: 0000000000058000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ieee80211_set_after_csa_beacon net/mac80211/cfg.c:3189 [inline]
 __ieee80211_csa_finalize net/mac80211/cfg.c:3245 [inline]
 ieee80211_csa_finalize+0x480/0xb10 net/mac80211/cfg.c:3268
 ieee80211_csa_finalize_work+0xf2/0x130 net/mac80211/cfg.c:3293
 process_one_work+0x85f/0x1010 kernel/workqueue.c:2310
 worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457
 kthread+0x436/0x520 kernel/kthread.c:334
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>

Crashes (11):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/02/22 09:53 linux-5.15.y 3330a8d33e08 6e7b5511 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ieee80211_ibss_csa_beacon
2026/02/15 19:30 linux-5.15.y e45d5d41c134 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ieee80211_ibss_csa_beacon
2026/02/09 18:40 linux-5.15.y 7b232985052f df949cd9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ieee80211_ibss_csa_beacon
2026/02/03 13:13 linux-5.15.y 9eec9a14ee10 6df4c87a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ieee80211_ibss_csa_beacon
2026/01/28 03:48 linux-5.15.y 9eec9a14ee10 3029c699 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ieee80211_ibss_csa_beacon
2025/12/08 15:24 linux-5.15.y 68efe5a6c16a d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ieee80211_ibss_csa_beacon
2025/12/06 20:54 linux-5.15.y cc5ec8769306 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ieee80211_ibss_csa_beacon
2025/11/04 04:34 linux-5.15.y cc5ec8769306 686bf657 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ieee80211_ibss_csa_beacon
2025/10/27 18:52 linux-5.15.y ac56c046adf4 fd2207e7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ieee80211_ibss_csa_beacon
2025/08/07 16:06 linux-5.15.y c79648372d02 04cffc22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ieee80211_ibss_csa_beacon
2025/07/26 04:49 linux-5.15.y c79648372d02 fb8f743d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 WARNING in ieee80211_ibss_csa_beacon
* Struck through repros no longer work on HEAD.