syzbot


WARNING: suspicious RCU usage in get_wiphy_regdom

Status: fixed on 2021/03/10 01:48
Subsystems: wireless
[Documentation on labels]
Reported-by: syzbot+db4035751c56c0079282@syzkaller.appspotmail.com
Fix commit: 51d62f2f2c50 cfg80211: Save the regulatory domain with a lock
First crash: 1192d, last: 1156d
Cause bisection: introduced by (bisect log) :
commit beee246951571cc5452176f3dbfe9aa5a10ba2b9
Author: Ilan Peer <ilan.peer@intel.com>
Date: Sun Nov 29 15:30:51 2020 +0000

  cfg80211: Save the regulatory domain when setting custom regulatory

Crash: WARNING: suspicious RCU usage in get_wiphy_regdom (log)
Repro: C syz .config
  
Discussions (2)
Title Replies (including bot) Last reply
[PATCH] cfg80211: Save the regulatory domain with a lock 3 (3) 2021/01/25 09:43
WARNING: suspicious RCU usage in get_wiphy_regdom 0 (1) 2020/12/16 21:54

Sample crash report:
=============================
WARNING: suspicious RCU usage
5.10.0-syzkaller #0 Not tainted
-----------------------------
net/wireless/reg.c:144 suspicious rcu_dereference_check() usage!

other info that might help us debug this:


rcu_scheduler_active = 2, debug_locks = 1
2 locks held by syz-executor685/8518:
 #0: ffffffff8c9bd070 (cb_lock){++++}-{3:3}, at: genl_rcv+0x15/0x40 net/netlink/genetlink.c:810
 #1: ffffffff8c9bd128 (genl_mutex){+.+.}-{3:3}, at: genl_lock net/netlink/genetlink.c:33 [inline]
 #1: ffffffff8c9bd128 (genl_mutex){+.+.}-{3:3}, at: genl_rcv_msg+0x3e0/0x580 net/netlink/genetlink.c:798

stack backtrace:
CPU: 0 PID: 8518 Comm: syz-executor685 Not tainted 5.10.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:120
 get_wiphy_regdom net/wireless/reg.c:144 [inline]
 get_wiphy_regdom+0xc3/0xd0 net/wireless/reg.c:142
 wiphy_apply_custom_regulatory+0x234/0x360 net/wireless/reg.c:2574
 mac80211_hwsim_new_radio+0x1f45/0x4830 drivers/net/wireless/mac80211_hwsim.c:3247
 hwsim_new_radio_nl+0x9a6/0x10b0 drivers/net/wireless/mac80211_hwsim.c:3822
 genl_family_rcv_msg_doit+0x228/0x320 net/netlink/genetlink.c:739
 genl_family_rcv_msg net/netlink/genetlink.c:783 [inline]
 genl_rcv_msg+0x328/0x580 net/netlink/genetlink.c:800
 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2494
 genl_rcv+0x24/0x40 net/netlink/genetlink.c:811
 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:652 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:672
 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2336
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2390
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2423
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x440309
Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fff952fb718 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440309
RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003
RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
R10: 0000000000401ba0 R11: 0000000000000246 R12: 0000000000401b10
R13: 0000000000401ba0 R14: 0000000000000000 R15: 0000000000000000

Crashes (5031):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/12/16 13:12 net-old 3db1a3fa9880 f213e07e .config console log report syz C ci-upstream-net-this-kasan-gce
2020/12/16 12:51 net-next-old efd5a1584537 f213e07e .config console log report syz C ci-upstream-net-kasan-gce
2020/12/12 22:56 net-next-old 00f7763a26cb bca53db9 .config console log report syz C ci-upstream-net-kasan-gce
2021/01/06 00:21 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing ed054e4e95d6 b1c228e1 .config console log report syz C ci2-upstream-usb
2020/12/24 15:21 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 3644e2d2dda7 c2c1d1dd .config console log report syz C ci2-upstream-usb
2020/12/23 07:59 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 3644e2d2dda7 04201c06 .config console log report syz C ci2-upstream-usb
2020/12/21 14:32 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 3644e2d2dda7 04201c06 .config console log report syz C ci2-upstream-usb
2020/12/20 13:10 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 3644e2d2dda7 04201c06 .config console log report syz C ci2-upstream-usb
2020/12/19 04:49 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 5e60366d56c6 04201c06 .config console log report syz C ci2-upstream-usb
2021/01/17 16:24 upstream 0da0a8a0a0e1 813be542 .config console log report info ci-upstream-kasan-gce WARNING: suspicious RCU usage in get_wiphy_regdom
2020/12/29 05:47 upstream dea8dcf2a9fa 8259d56c .config console log report info ci-qemu-upstream
2020/12/28 06:36 upstream 5c8fe583cce5 2242f77f .config console log report info ci-upstream-kasan-gce-selinux-root
2020/12/28 04:26 upstream 5c8fe583cce5 2242f77f .config console log report info ci-upstream-kasan-gce-root
2020/12/29 08:42 upstream dea8dcf2a9fa 8259d56c .config console log report info ci-upstream-kasan-gce-386
2021/01/04 22:43 net-old 862aecbd9569 2a28ff1f .config console log report info ci-upstream-net-this-kasan-gce
2021/01/04 20:37 net-old 4bfc4714849d 79264ae3 .config console log report info ci-upstream-net-this-kasan-gce
2021/01/04 19:12 net-old 4bfc4714849d 79264ae3 .config console log report info ci-upstream-net-this-kasan-gce
2021/01/04 18:31 net-old 4bfc4714849d 79264ae3 .config console log report info ci-upstream-net-this-kasan-gce
2021/01/04 13:24 net-old 4bfc4714849d 79264ae3 .config console log report info ci-upstream-net-this-kasan-gce
2021/01/04 12:24 net-old 4bfc4714849d 79264ae3 .config console log report info ci-upstream-net-this-kasan-gce
2021/01/04 11:01 net-old 4bfc4714849d 79264ae3 .config console log report info ci-upstream-net-this-kasan-gce
2021/01/04 04:36 net-old 4bfc4714849d 79264ae3 .config console log report info ci-upstream-net-this-kasan-gce
2021/01/04 03:19 net-old 4bfc4714849d 79264ae3 .config console log report info ci-upstream-net-this-kasan-gce
2021/01/04 01:44 net-old 4bfc4714849d 79264ae3 .config console log report info ci-upstream-net-this-kasan-gce
2021/01/04 01:42 net-old 4bfc4714849d 79264ae3 .config console log report info ci-upstream-net-this-kasan-gce
2021/01/04 00:27 net-old 4bfc4714849d 79264ae3 .config console log report info ci-upstream-net-this-kasan-gce
2021/01/03 19:48 net-old 4bfc4714849d 79264ae3 .config console log report info ci-upstream-net-this-kasan-gce
2021/01/03 18:44 net-old 4bfc4714849d 79264ae3 .config console log report info ci-upstream-net-this-kasan-gce
2021/01/03 17:57 net-old 4bfc4714849d 79264ae3 .config console log report info ci-upstream-net-this-kasan-gce
2021/01/03 16:51 net-old 4bfc4714849d 79264ae3 .config console log report info ci-upstream-net-this-kasan-gce
2021/01/03 14:58 net-old 4bfc4714849d 79264ae3 .config console log report info ci-upstream-net-this-kasan-gce
2021/01/03 12:31 net-old 4bfc4714849d 79264ae3 .config console log report info ci-upstream-net-this-kasan-gce
2021/01/03 09:46 net-old 4bfc4714849d 79264ae3 .config console log report info ci-upstream-net-this-kasan-gce
2021/01/03 05:14 net-old 4bfc4714849d 79264ae3 .config console log report info ci-upstream-net-this-kasan-gce
2021/01/03 02:37 net-old 4bfc4714849d 79264ae3 .config console log report info ci-upstream-net-this-kasan-gce
2021/01/06 00:19 net-next-old 3db1a3fa9880 a0234d98 .config console log report info ci-upstream-net-kasan-gce
2021/01/05 21:15 net-next-old 3db1a3fa9880 a0234d98 .config console log report info ci-upstream-net-kasan-gce
2021/01/05 10:36 net-next-old 3db1a3fa9880 a0234d98 .config console log report info ci-upstream-net-kasan-gce
2021/01/05 08:05 bpf-next 482ec343f40a 2a28ff1f .config console log report info ci-upstream-bpf-next-kasan-gce
2021/01/05 07:05 net-next-old 3db1a3fa9880 2a28ff1f .config console log report info ci-upstream-net-kasan-gce
2021/01/05 02:28 net-next-old 3db1a3fa9880 2a28ff1f .config console log report info ci-upstream-net-kasan-gce
2021/01/04 21:37 net-next-old 3db1a3fa9880 2a28ff1f .config console log report info ci-upstream-net-kasan-gce
2021/01/04 14:25 net-next-old 3db1a3fa9880 79264ae3 .config console log report info ci-upstream-net-kasan-gce
2021/01/04 09:02 net-next-old 3db1a3fa9880 79264ae3 .config console log report info ci-upstream-net-kasan-gce
2021/01/03 22:44 net-next-old 3db1a3fa9880 79264ae3 .config console log report info ci-upstream-net-kasan-gce
2021/01/03 21:24 net-next-old 3db1a3fa9880 79264ae3 .config console log report info ci-upstream-net-kasan-gce
2021/01/03 13:56 net-next-old 3db1a3fa9880 79264ae3 .config console log report info ci-upstream-net-kasan-gce
2021/01/03 13:38 net-next-old 3db1a3fa9880 79264ae3 .config console log report info ci-upstream-net-kasan-gce
2021/01/03 06:43 net-next-old 3db1a3fa9880 79264ae3 .config console log report info ci-upstream-net-kasan-gce
2020/12/12 21:47 net-next-old 00f7763a26cb bca53db9 .config console log report info ci-upstream-net-kasan-gce
2021/01/05 05:52 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 8280de6ab07b 2a28ff1f .config console log report info ci2-upstream-usb
2021/01/04 17:02 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing 8280de6ab07b 79264ae3 .config console log report info ci2-upstream-usb
2021/01/04 15:33 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing cb4d9b52ec06 79264ae3 .config console log report info ci2-upstream-usb
2021/01/04 07:48 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing cb4d9b52ec06 79264ae3 .config console log report info ci2-upstream-usb
2021/01/04 05:39 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing cb4d9b52ec06 79264ae3 .config console log report info ci2-upstream-usb
2021/01/03 10:54 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing cb4d9b52ec06 79264ae3 .config console log report info ci2-upstream-usb
2021/01/03 08:51 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing cb4d9b52ec06 79264ae3 .config console log report info ci2-upstream-usb
2021/01/03 07:45 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing cb4d9b52ec06 79264ae3 .config console log report info ci2-upstream-usb
2021/01/03 04:12 https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing cb4d9b52ec06 79264ae3 .config console log report info ci2-upstream-usb
2020/12/28 17:11 linux-next d7a03a44a5e9 8259d56c .config console log report info ci-upstream-linux-next-kasan-gce-root
* Struck through repros no longer work on HEAD.