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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: 283d, last: 12d
▶ ▼ 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 1165d 2035d 22/29 fixed on 2023/02/24 13:50
linux-6.6 WARNING in ieee80211_ibss_csa_beacon -1 1 313d 313d 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 3 13h52m 156d 0/2 upstream: reported on 2025/11/29 13:51
linux-6.1 WARNING in ieee80211_ibss_csa_beacon (2) -1 12 22d 168d 0/3 upstream: reported on 2025/11/18 07:37
linux-4.19 WARNING in ieee80211_ibss_csa_beacon -1 C error 1037 1155d 1990d 0/1 upstream: reported C repro on 2020/11/22 05:50
linux-4.14 WARNING in ieee80211_ibss_csa_beacon -1 C 1 1171d 2003d 0/1 upstream: reported C repro on 2020/11/08 18:28
linux-5.15 WARNING in ieee80211_ibss_csa_beacon -1 504 542d 1153d 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 382d 467d 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 827d 1161d 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 268d 1154d 0/3 auto-obsoleted due to no activity on 2025/10/18 20:45

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4838 at net/mac80211/ibss.c:503 ieee80211_ibss_csa_beacon+0x544/0x620 net/mac80211/ibss.c:503
Modules linked in:
CPU: 0 PID: 4838 Comm: kworker/u4:12 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:ieee80211_ibss_csa_beacon+0x544/0x620 net/mac80211/ibss.c:503
Code: f8 c6 05 84 47 30 04 01 48 c7 c7 90 61 39 8b be 01 02 00 00 48 c7 c2 20 62 39 8b e8 c6 0a 6c 00 e9 62 fe ff ff e8 1c 38 33 f8 <0f> 0b b8 ea ff ff ff e9 7a ff ff ff e8 0b 38 33 f8 0f 0b e9 23 fb
RSP: 0018:ffffc9000314f490 EFLAGS: 00010287
RAX: ffffffff8945fc74 RBX: ffff88805ec91ad8 RCX: 0000000000100000
RDX: ffffc90013125000 RSI: 00000000000004f5 RDI: 00000000000004f6
RBP: dffffc0000000000 R08: ffffffff901d518f R09: 1ffffffff203aa31
R10: dffffc0000000000 R11: fffffbfff203aa32 R12: ffff88805ec91288
R13: ffff88807a290620 R14: ffff88805ec90c80 R15: 1ffff1100bd92251
FS:  0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe23d6d9ff8 CR3: 000000002b33b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ieee80211_set_csa_beacon+0x6b0/0x9c0 net/mac80211/cfg.c:3383
 __ieee80211_channel_switch net/mac80211/cfg.c:3513 [inline]
 ieee80211_channel_switch+0x7dc/0xcc0 net/mac80211/cfg.c:3551
 ieee80211_ibss_process_chanswitch+0xa7b/0xcd0 net/mac80211/ibss.c:892
 ieee80211_rx_mgmt_spectrum_mgmt net/mac80211/ibss.c:931 [inline]
 ieee80211_ibss_rx_queued_mgmt+0xed1/0x2ab0 net/mac80211/ibss.c:1667
 ieee80211_iface_process_skb net/mac80211/iface.c:1459 [inline]
 ieee80211_iface_work+0x70e/0xc60 net/mac80211/iface.c:1513
 cfg80211_wiphy_work+0x221/0x260 net/wireless/core.c:433
 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 (13):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/04/22 14:06 linux-5.15.y b9d57c40a767 4595e353 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ieee80211_ibss_csa_beacon
2026/04/22 14:05 linux-5.15.y b9d57c40a767 4595e353 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan WARNING in ieee80211_ibss_csa_beacon
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.