syzbot


WARNING in ieee80211_ibss_csa_beacon

Status: upstream: reported on 2025/06/25 10:51
Reported-by: syzbot+a0352cce58ad35c9aecd@syzkaller.appspotmail.com
First crash: 4d00h, last: 4d00h
Similar bugs (7)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in ieee80211_ibss_csa_beacon wireless C error 4997 856d 1725d 22/29 fixed on 2023/02/24 13:50
linux-4.19 WARNING in ieee80211_ibss_csa_beacon C error 1037 845d 1680d 0/1 upstream: reported C repro on 2020/11/22 05:50
linux-4.14 WARNING in ieee80211_ibss_csa_beacon C 1 861d 1693d 0/1 upstream: reported C repro on 2020/11/08 18:28
linux-5.15 WARNING in ieee80211_ibss_csa_beacon 504 232d 843d 0/3 auto-obsoleted due to no activity on 2025/01/17 15:26
linux-5.15 WARNING in ieee80211_ibss_csa_beacon (2) 15 72d 157d 0/3 upstream: reported on 2025/01/22 20:29
upstream WARNING in ieee80211_ibss_csa_beacon (2) wireless 2892 518d 851d 0/29 auto-obsoleted due to no activity on 2024/04/07 10:40
linux-6.1 WARNING in ieee80211_ibss_csa_beacon 316 20d 844d 0/3 upstream: reported on 2023/03/08 04:59

Sample crash report:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 11574 at net/mac80211/ibss.c:501 ieee80211_ibss_csa_beacon+0x5bd/0x6a0 net/mac80211/ibss.c:501
Modules linked in:
CPU: 1 PID: 11574 Comm: syz.3.1474 Not tainted 6.6.94-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:ieee80211_ibss_csa_beacon+0x5bd/0x6a0 net/mac80211/ibss.c:501
Code: f7 c6 05 95 47 58 04 01 48 c7 c7 20 a3 bd 8b be fe 01 00 00 48 c7 c2 c0 a3 bd 8b e8 fd 9e 8b f7 e9 5f fe ff ff e8 f3 88 a9 f7 <0f> 0b b8 ea ff ff ff e9 7a ff ff ff e8 e2 88 a9 f7 0f 0b e9 b2 fa
RSP: 0018:ffffc9000b946f00 EFLAGS: 00010287
RAX: ffffffff89dc0cdd RBX: ffff88801e648700 RCX: 0000000000080000
RDX: ffffc9000cdeb000 RSI: 0000000000001ae6 RDI: 0000000000001ae7
RBP: 1ffff1100bc1fab3 R08: ffffffff90d855e7 R09: 1ffffffff21b0abc
R10: dffffc0000000000 R11: fffffbfff21b0abd R12: ffffc9000b9470e0
R13: ffff88805e0fd598 R14: ffff88805e0fda88 R15: ffff88805e0fcc80
FS:  00007f257e2bf6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2c917ff8 CR3: 0000000056953000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ieee80211_set_csa_beacon+0x77e/0xa10 net/mac80211/cfg.c:3836
 __ieee80211_channel_switch net/mac80211/cfg.c:3964 [inline]
 ieee80211_channel_switch+0x7c2/0xe30 net/mac80211/cfg.c:4009
 rdev_channel_switch+0xeb/0x240 net/wireless/rdev-ops.h:1111
 nl80211_channel_switch+0xa07/0x1040 net/wireless/nl80211.c:10335
 genl_family_rcv_msg_doit+0x209/0x2f0 net/netlink/genetlink.c:971
 genl_family_rcv_msg net/netlink/genetlink.c:1051 [inline]
 genl_rcv_msg+0x60b/0x790 net/netlink/genetlink.c:1066
 netlink_rcv_skb+0x216/0x480 net/netlink/af_netlink.c:2537
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1075
 netlink_unicast_kernel net/netlink/af_netlink.c:1323 [inline]
 netlink_unicast+0x750/0x8c0 net/netlink/af_netlink.c:1349
 netlink_sendmsg+0x8c1/0xbe0 net/netlink/af_netlink.c:1891
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg net/socket.c:745 [inline]
 ____sys_sendmsg+0x5bf/0x950 net/socket.c:2595
 ___sys_sendmsg+0x220/0x290 net/socket.c:2649
 __sys_sendmsg net/socket.c:2678 [inline]
 __do_sys_sendmsg net/socket.c:2687 [inline]
 __se_sys_sendmsg+0x1a5/0x270 net/socket.c:2685
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f257d38e929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f257e2bf038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f257d5b5fa0 RCX: 00007f257d38e929
RDX: 0000000000000000 RSI: 0000200000000200 RDI: 0000000000000003
RBP: 00007f257d410b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f257d5b5fa0 R15: 00007ffc346fb518
 </TASK>

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/06/25 10:50 linux-6.6.y 6282921b6825 26d77996 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan WARNING in ieee80211_ibss_csa_beacon
* Struck through repros no longer work on HEAD.