WARNING in ieee80211_ibss_csa_beacon (2)

Status: upstream: reported on 2025/11/18 07:37
Reported-by: syzbot+510f2b0097f0edee4ad2@syzkaller.appspotmail.com
First crash: 310d, last: 17h49m
▶ ▼ 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 syz, C error 4997 1307d 2177d 22/29 fixed on 2023/02/24 13:50
linux-5.15 WARNING in ieee80211_ibss_csa_beacon (3) -1 19 38d 425d 0/3 upstream: reported on 2025/07/26 04:50
linux-6.6 WARNING in ieee80211_ibss_csa_beacon -1 1 455d 455d 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 7 41d 298d 0/2 upstream: reported on 2025/11/29 13:51
linux-4.19 WARNING in ieee80211_ibss_csa_beacon -1 syz, C error 1037 1297d 2132d 0/1 upstream: reported C repro on 2020/11/22 05:50
linux-4.14 WARNING in ieee80211_ibss_csa_beacon -1 syz, C 1 1313d 2145d 0/1 upstream: reported C repro on 2020/11/08 18:28
linux-5.15 WARNING in ieee80211_ibss_csa_beacon -1 504 684d 1295d 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 524d 609d 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 969d 1303d 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 410d 1296d 0/3 auto-obsoleted due to no activity on 2025/10/18 20:45

Sample crash report:
IPv6: ADDRCONF(NETDEV_CHANGE): bond3: link becomes ready
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4345 at net/mac80211/ibss.c:500 ieee80211_ibss_csa_beacon+0x5b4/0x680 net/mac80211/ibss.c:500
Modules linked in:
CPU: 1 PID: 4345 Comm: kworker/u4:8 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:ieee80211_ibss_csa_beacon+0x5b4/0x680 net/mac80211/ibss.c:500
Code: f7 c6 05 87 e0 60 04 01 48 c7 c7 f0 dd a6 8b be fd 01 00 00 48 c7 c2 80 de a6 8b e8 46 45 b9 f7 e9 69 fe ff ff e8 ec cc d6 f7 <0f> 0b b8 ea ff ff ff e9 7a ff ff ff e8 db cc d6 f7 0f 0b e9 b4 fa
RSP: 0018:ffffc900048ef370 EFLAGS: 00010287
RAX: ffffffff89ab65f4 RBX: ffff88807cf30740 RCX: 0000000000100000
RDX: ffffc9001a3c1000 RSI: 000000000000076b RDI: 000000000000076c
RBP: 1ffff1100faa2ab5 R08: ffffffff90b0f307 R09: 1ffffffff2161e60
R10: dffffc0000000000 R11: fffffbfff2161e61 R12: dffffc0000000000
R13: ffff88807d515ac8 R14: ffff88807d514c80 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2e694f CR3: 000000004926f000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ieee80211_set_csa_beacon+0x78a/0xa80 net/mac80211/cfg.c:3744
 __ieee80211_channel_switch net/mac80211/cfg.c:3874 [inline]
 ieee80211_channel_switch+0x7dd/0xce0 net/mac80211/cfg.c:3914
 ieee80211_ibss_process_chanswitch+0x8f2/0xc90 net/mac80211/ibss.c:888
 ieee80211_rx_mgmt_spectrum_mgmt net/mac80211/ibss.c:927 [inline]
 ieee80211_ibss_rx_queued_mgmt+0x108b/0x2eb0 net/mac80211/ibss.c:1662
 ieee80211_iface_process_skb net/mac80211/iface.c:1685 [inline]
 ieee80211_iface_work+0x72c/0xc70 net/mac80211/iface.c:1739
 cfg80211_wiphy_work+0x224/0x260 net/wireless/core.c:433
 process_one_work+0x8ab/0x1160 kernel/workqueue.c:2292
 worker_thread+0xaf5/0x12a0 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 (34):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/09/23 16:13 linux-6.1.y 1a8763b93150 abce1216 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_ibss_csa_beacon
2026/09/22 08:14 linux-6.1.y 1a8763b93150 e12281bd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_ibss_csa_beacon
2026/08/04 02:46 linux-6.1.y fb28aa725e05 9451e17e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_ibss_csa_beacon
2026/07/24 20:11 linux-6.1.y dc5c83b7f5f8 dd737a83 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_ibss_csa_beacon
2026/07/22 14:57 linux-6.1.y 090666d3cc90 4a865b71 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_ibss_csa_beacon
2026/07/22 14:57 linux-6.1.y 090666d3cc90 4a865b71 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_ibss_csa_beacon
2026/07/22 02:21 linux-6.1.y 090666d3cc90 b561ce9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_ibss_csa_beacon
2026/07/22 02:20 linux-6.1.y 090666d3cc90 b561ce9c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_ibss_csa_beacon
2026/07/09 02:20 linux-6.1.y 090666d3cc90 b9f1ceaa .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_ibss_csa_beacon
2026/07/04 18:25 linux-6.1.y 090666d3cc90 fcece630 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_ibss_csa_beacon
2026/06/11 05:55 linux-6.1.y 228da13e907e b754d2d8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_ibss_csa_beacon
2026/05/27 00:35 linux-6.1.y dcbcab9d7079 2b01f00e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_ibss_csa_beacon
2026/05/20 01:38 linux-6.1.y c27210688955 0909d65f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_ibss_csa_beacon
2026/05/15 11:57 linux-6.1.y ad16b162f21d 9cd3beaa .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_ibss_csa_beacon
2026/04/12 10:28 linux-6.1.y 8e8fc038cad5 38c8e246 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_ibss_csa_beacon
2026/03/09 18:29 linux-6.1.y f2ddafa93a25 176bead5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_ibss_csa_beacon
2026/03/05 19:50 linux-6.1.y f2ddafa93a25 d20b04c8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_ibss_csa_beacon
2026/02/13 19:34 linux-6.1.y 8ce36b2849ef 1e62d198 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_ibss_csa_beacon
2026/02/12 18:45 linux-6.1.y 8ce36b2849ef 504cb1bf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_ibss_csa_beacon
2026/02/10 14:06 linux-6.1.y 0182cb5b74ee 91d776d3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_ibss_csa_beacon
2025/12/14 00:03 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_ibss_csa_beacon
2025/12/11 03:47 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_ibss_csa_beacon
2025/11/29 14:48 linux-6.1.y f6e38ae624cf d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING in ieee80211_ibss_csa_beacon
2026/07/28 19:31 linux-6.1.y dc5c83b7f5f8 edc8a875 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_ibss_csa_beacon
2026/07/27 16:25 linux-6.1.y dc5c83b7f5f8 aae9036b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_ibss_csa_beacon
2026/07/15 12:51 linux-6.1.y 090666d3cc90 a4ed0f4f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_ibss_csa_beacon
2026/07/04 00:37 linux-6.1.y fdb6fcb41cc7 fcece630 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_ibss_csa_beacon
2026/06/13 10:57 linux-6.1.y 228da13e907e 1d2f3589 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_ibss_csa_beacon
2026/05/24 01:22 linux-6.1.y dcbcab9d7079 c69befb3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_ibss_csa_beacon
2026/05/23 20:30 linux-6.1.y dcbcab9d7079 c69befb3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_ibss_csa_beacon
2026/05/19 01:14 linux-6.1.y c27210688955 9f74d399 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_ibss_csa_beacon
2025/12/09 02:28 linux-6.1.y 50cbba13faa2 d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_ibss_csa_beacon
2025/11/26 20:11 linux-6.1.y f6e38ae624cf d6526ea3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_ibss_csa_beacon
2025/11/18 07:37 linux-6.1.y f6e38ae624cf ef766cd7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING in ieee80211_ibss_csa_beacon
* Struck through repros no longer work on HEAD.