WARNING in ieee80211_probe

WARNING in ieee80211_probe_client
Status: upstream: reported C repro on 2020/10/06 08:08
Reported-by: syzbot+999fac712d84878a7379@syzkaller.appspotmail.com
First crash: 20d, last: 16d

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: WARNING in sysfs_warn_dup (log)
Repro: C syz .config

similar bugs (1):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.14	WARNING in ieee80211_probe_client				1	22h45m	22h44m	0/1	upstream: reported on 2020/10/25 13:44

Sample crash report:

------------[ cut here ]------------
WARNING: CPU: 1 PID: 6941 at net/mac80211/cfg.c:3534 ieee80211_probe_client+0x6ed/0x7f0 net/mac80211/cfg.c:3534
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 6941 Comm: syz-executor540 Not tainted 5.9.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x198/0x1fd lib/dump_stack.c:118
 panic+0x382/0x7fb kernel/panic.c:231
 __warn.cold+0x20/0x4b kernel/panic.c:600
 report_bug+0x1bd/0x210 lib/bug.c:198
 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:234
 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:254
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536
RIP: 0010:ieee80211_probe_client+0x6ed/0x7f0 net/mac80211/cfg.c:3534
Code: f9 48 c7 c2 20 37 5f 89 be 7b 02 00 00 48 c7 c7 80 37 5f 89 c6 05 70 58 8c 03 01 e8 f2 0e 94 f9 e9 e3 f9 ff ff e8 c3 ef ad f9 <0f> 0b 41 bc ea ff ff ff e9 51 fe ff ff e8 81 c8 ee f9 e9 de fc ff
RSP: 0018:ffffc900053ef5b8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff8880937ac000 RCX: ffffffff87c84e88
RDX: ffff8880a419a580 RSI: ffffffff87c84f4d RDI: 0000000000000005
RBP: ffff8880a22cec20 R08: 0000000000000001 R09: ffffffff8d0c39e7
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888089060c80
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000
 rdev_probe_client net/wireless/rdev-ops.h:929 [inline]
 nl80211_probe_client+0x3b7/0xc80 net/wireless/nl80211.c:12452
 genl_family_rcv_msg_doit net/netlink/genetlink.c:669 [inline]
 genl_family_rcv_msg net/netlink/genetlink.c:714 [inline]
 genl_rcv_msg+0x61d/0x980 net/netlink/genetlink.c:731
 netlink_rcv_skb+0x15a/0x430 net/netlink/af_netlink.c:2470
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:742
 netlink_unicast_kernel net/netlink/af_netlink.c:1304 [inline]
 netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1330
 netlink_sendmsg+0x856/0xd90 net/netlink/af_netlink.c:1919
 sock_sendmsg_nosec net/socket.c:651 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:671
 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2353
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2407
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2440
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x442169
Code: e8 ac 00 03 00 48 83 c4 18 c3 0f 1f 80 00 00 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 0f 83 7b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffc7f9708f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000442169
RDX: 0000000000000000 RSI: 00000000200002c0 RDI: 0000000000000004
RBP: 000000306e616c77 R08: 0000002000000000 R09: 0000002000000000
R10: 0000002000000000 R11: 0000000000000246 R12: 000000000000fc89
R13: 0000000000000000 R14: 000000000000000c R15: 0000000000000004
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (5):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Maintainers
ci-upstream-net-this-kasan-gce	2020/10/10 00:01	net	3fdd47c3	d81b165e	.config	log	report	syz	C		davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-net-kasan-gce	2020/10/06 03:51	net-next	c2568c8c	1880b4a9	.config	log	report	syz	C		davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce-selinux-root	2020/10/06 07:37	upstream	7575fdda	1880b4a9	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-kasan-gce-smack-root	2020/10/05 12:46	upstream	549738f1	5ef9c291	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org
ci-upstream-net-kasan-gce	2020/10/06 06:38	net-next	c2568c8c	1880b4a9	.config	log	report			info	davem@davemloft.net, johannes@sipsolutions.net, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org