syzbot


WARNING in wiphy_register (5)

Status: upstream: reported C repro on 2026/05/08 00:30
Subsystems: wireless
[Documentation on labels]
Reported-by: syzbot+2002864e6c6895cb0ac3@syzkaller.appspotmail.com
First crash: 4d15h, last: 4d11h
Cause bisection: failed (error log, bisect log)
  
Discussions (2)
Title Replies (including bot) Last reply
[PATCH] wifi: mac80211_hwsim: reject NAN on multi-radio wiphys 1 (1) 2026/05/09 00:46
[syzbot] [wireless?] WARNING in wiphy_register (5) 0 (2) 2026/05/08 02:17
Similar bugs (4)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream WARNING in wiphy_register (3) wireless -1 syz 31 2658d 2689d 11/29 fixed on 2019/03/06 07:43
upstream WARNING in wiphy_register (4) wireless -1 syz error 3 2584d 2613d 12/29 fixed on 2019/05/27 12:48
upstream WARNING in wiphy_register wireless -1 C 15 3037d 3039d 4/29 fixed on 2018/01/22 13:19
upstream WARNING in wiphy_register (2) wireless -1 C 8 2824d 2825d 10/29 fixed on 2018/09/11 03:32
Last patch testing requests (1)
Created Duration User Patch Repo Result
2026/05/08 02:17 46m kartikey406@gmail.com patch git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git main OK log

Sample crash report:
------------[ cut here ]------------
(wiphy->interface_modes & BIT(NL80211_IFTYPE_NAN_DATA)) && (!wiphy->nan_capa.phy.ht.ht_supported || wiphy->n_radio > 1)
WARNING: net/wireless/core.c:885 at wiphy_register+0x58a/0x2fe0 net/wireless/core.c:884, CPU#0: syz.0.17/5835
Modules linked in:
CPU: 0 UID: 0 PID: 5835 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:wiphy_register+0x58a/0x2fe0 net/wireless/core.c:884
Code: 00 00 e8 49 8f d4 f6 90 0f 0b 90 e9 67 0a 00 00 e8 3b 8f d4 f6 e9 59 0a 00 00 e8 31 8f d4 f6 e9 eb 00 00 00 e8 27 8f d4 f6 90 <0f> 0b 90 e9 45 0a 00 00 44 89 f8 24 06 0f b6 d8 31 ff 89 de e8 0d
RSP: 0018:ffffc90003236860 EFLAGS: 00010293
RAX: ffffffff8af13fe2 RBX: 0000000000000004 RCX: ffff88802ed60000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001
RBP: ffffc900032369f0 R08: ffff8880582b0faf R09: 1ffff1100b0561f5
R10: dffffc0000000000 R11: ffffed100b0561f6 R12: ffff8880582b0740
R13: dffffc0000000000 R14: ffffffff8d002990 R15: ffff8880582b0804
FS:  0000555593855500(0000) GS:ffff888125289000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007eff2e872700 CR3: 0000000075672000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ieee80211_register_hw+0x3c53/0x4910 net/mac80211/main.c:1627
 mac80211_hwsim_new_radio+0x3327/0x57e0 drivers/net/wireless/virtual/mac80211_hwsim_main.c:6047
 hwsim_new_radio_nl+0xe20/0x26e0 drivers/net/wireless/virtual/mac80211_hwsim_main.c:6832
 genl_family_rcv_msg_doit+0x22a/0x330 net/netlink/genetlink.c:1114
 genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline]
 genl_rcv_msg+0x61c/0x7a0 net/netlink/genetlink.c:1209
 netlink_rcv_skb+0x232/0x4b0 net/netlink/af_netlink.c:2551
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0x75c/0x8e0 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1895
 sock_sendmsg_nosec net/socket.c:787 [inline]
 __sock_sendmsg net/socket.c:802 [inline]
 ____sys_sendmsg+0x972/0x9f0 net/socket.c:2698
 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2752
 __sys_sendmsg net/socket.c:2784 [inline]
 __do_sys_sendmsg net/socket.c:2789 [inline]
 __se_sys_sendmsg net/socket.c:2787 [inline]
 __x64_sys_sendmsg+0x1bd/0x2a0 net/socket.c:2787
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7eff2e99cdd9
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:00007ffd72c5edf8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007eff2ec15fa0 RCX: 00007eff2e99cdd9
RDX: 0000000000000000 RSI: 0000200000000100 RDI: 0000000000000003
RBP: 00007eff2ea32d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007eff2ec15fac R14: 00007eff2ec15fa0 R15: 00007eff2ec15fa0
 </TASK>

Crashes (6):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/05/06 23:14 net-next 2281958e6007 cbcd9ea0 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in wiphy_register
2026/05/06 21:45 net-next 2281958e6007 cbcd9ea0 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in wiphy_register
2026/05/06 19:17 net-next 2281958e6007 cbcd9ea0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in wiphy_register
2026/05/06 19:12 net-next 2281958e6007 cbcd9ea0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in wiphy_register
2026/05/06 18:55 net-next 2281958e6007 cbcd9ea0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in wiphy_register
2026/05/06 18:55 net-next 2281958e6007 cbcd9ea0 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-net-kasan-gce WARNING in wiphy_register
* Struck through repros no longer work on HEAD.