syzbot


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: 163d, last: 18d
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 1161d 2030d 22/29 fixed on 2023/02/24 13:50
linux-5.15 WARNING in ieee80211_ibss_csa_beacon (3) -1 13 8d12h 278d 0/3 upstream: reported on 2025/07/26 04:50
linux-6.6 WARNING in ieee80211_ibss_csa_beacon -1 1 309d 309d 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 79d 152d 0/2 upstream: reported on 2025/11/29 13:51
linux-4.19 WARNING in ieee80211_ibss_csa_beacon -1 C error 1037 1151d 1985d 0/1 upstream: reported C repro on 2020/11/22 05:50
linux-4.14 WARNING in ieee80211_ibss_csa_beacon -1 C 1 1167d 1999d 0/1 upstream: reported C repro on 2020/11/08 18:28
linux-5.15 WARNING in ieee80211_ibss_csa_beacon -1 504 538d 1148d 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 378d 463d 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 823d 1157d 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 264d 1149d 0/3 auto-obsoleted due to no activity on 2025/10/18 20:45

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 16079 at net/mac80211/ibss.c:500 ieee80211_ibss_csa_beacon+0x5aa/0x690 net/mac80211/ibss.c:500
Modules linked in:
CPU: 0 PID: 16079 Comm: syz.9.2481 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:ieee80211_ibss_csa_beacon+0x5aa/0x690 net/mac80211/ibss.c:500
Code: f7 c6 05 c2 92 64 04 01 48 c7 c7 50 8b a6 8b be fd 01 00 00 48 c7 c2 e0 8b a6 8b e8 a0 fd bd f7 e9 60 fe ff ff e8 b6 84 db f7 <0f> 0b b8 ea ff ff ff e9 7a ff ff ff e8 a5 84 db f7 0f 0b e9 be fa
RSP: 0018:ffffc90005706f68 EFLAGS: 00010283
RAX: ffffffff89a6f09a RBX: ffff8880797c0740 RCX: 0000000000080000
RDX: ffffc90014210000 RSI: 00000000000023c3 RDI: 00000000000023c4
RBP: 1ffff1100b1eeab5 R08: ffffffff90af9307 R09: 1ffffffff215f260
R10: dffffc0000000000 R11: fffffbfff215f261 R12: ffff888058f755a8
R13: ffff888058f75ac8 R14: ffff888058f74c80 R15: dffffc0000000000
FS:  00007f7f65ec36c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c379828 CR3: 000000007b4a9000 CR4: 00000000003506f0
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
 rdev_channel_switch+0x104/0x2b0 net/wireless/rdev-ops.h:1098
 nl80211_channel_switch+0xaa9/0x10f0 net/wireless/nl80211.c:10216
 genl_family_rcv_msg_doit+0x22a/0x330 net/netlink/genetlink.c:756
 genl_family_rcv_msg net/netlink/genetlink.c:833 [inline]
 genl_rcv_msg+0x604/0x790 net/netlink/genetlink.c:850
 netlink_rcv_skb+0x1fb/0x450 net/netlink/af_netlink.c:2511
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:861
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x74d/0x8d0 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x8ad/0xbd0 net/netlink/af_netlink.c:1872
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 ____sys_sendmsg+0x5be/0x970 net/socket.c:2518
 ___sys_sendmsg+0x2a2/0x360 net/socket.c:2572
 __sys_sendmsg net/socket.c:2601 [inline]
 __do_sys_sendmsg net/socket.c:2610 [inline]
 __se_sys_sendmsg+0x1bb/0x2a0 net/socket.c:2608
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f7f64f9c819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f7f65ec3028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f7f65215fa0 RCX: 00007f7f64f9c819
RDX: 0000000000000000 RSI: 0000200000000200 RDI: 0000000000000003
RBP: 00007f7f65032c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7f65216038 R14: 00007f7f65215fa0 R15: 00007fffe0b7f848
 </TASK>

Crashes (12):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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
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.