syzbot


WARNING: suspicious RCU usage in sta_remove_link

Status: upstream: reported C repro on 2024/02/11 20:49
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+032c719ad778939ed041@syzkaller.appspotmail.com
First crash: 496d, last: 3h13m
Bug presence (2)
Date Name Commit Repro Result
2024/02/12 linux-6.1.y (ToT) f1bb70486c9c C [report] WARNING: suspicious RCU usage in sta_remove_link
2024/02/12 upstream (ToT) 841c35169323 C Didn't crash
Fix bisection attempts (1)
Created Duration User Patch Repo Result
2024/03/25 13:04 1h55m fix candidate upstream OK (0) job log

Sample crash report:
=============================
WARNING: suspicious RCU usage
6.1.141-syzkaller #0 Not tainted
-----------------------------
net/mac80211/sta_info.c:361 suspicious rcu_dereference_protected() usage!

other info that might help us debug this:


rcu_scheduler_active = 2, debug_locks = 1
3 locks held by syz-executor756/4294:
 #0: ffff800017735930 (cb_lock){++++}-{3:3}, at: genl_rcv+0x28/0x50 net/netlink/genetlink.c:860
 #1: ffff0000d13007c8 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: wiphy_lock include/net/cfg80211.h:5639 [inline]
 #1: ffff0000d13007c8 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: nl80211_pre_doit+0x238/0x760 net/wireless/nl80211.c:16308
 #2: ffff0000d1254d40 (&wdev->mtx){+.+.}-{3:3}, at: wdev_lock net/wireless/core.h:231 [inline]
 #2: ffff0000d1254d40 (&wdev->mtx){+.+.}-{3:3}, at: nl80211_new_station+0x10ac/0x1584 net/wireless/nl80211.c:7419

stack backtrace:
CPU: 1 PID: 4294 Comm: syz-executor756 Not tainted 6.1.141-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 lockdep_rcu_suspicious+0x20c/0x3d4 kernel/locking/lockdep.c:6611
 sta_remove_link+0x2bc/0x3d8 net/mac80211/sta_info.c:360
 sta_info_free+0x60/0x608 net/mac80211/sta_info.c:405
 ieee80211_add_station+0x2fc/0x4d4 net/mac80211/cfg.c:1979
 rdev_add_station+0x148/0x37c net/wireless/rdev-ops.h:201
 nl80211_new_station+0x116c/0x1584 net/wireless/nl80211.c:7435
 genl_family_rcv_msg_doit+0x1f8/0x2f4 net/netlink/genetlink.c:756
 genl_family_rcv_msg net/netlink/genetlink.c:833 [inline]
 genl_rcv_msg+0x444/0x62c net/netlink/genetlink.c:850
 netlink_rcv_skb+0x208/0x3c4 net/netlink/af_netlink.c:2493
 genl_rcv+0x38/0x50 net/netlink/genetlink.c:861
 netlink_unicast_kernel net/netlink/af_netlink.c:1311 [inline]
 netlink_unicast+0x600/0x818 net/netlink/af_netlink.c:1337
 netlink_sendmsg+0x6e8/0x9b0 net/netlink/af_netlink.c:1859
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 ____sys_sendmsg+0x5b8/0x918 net/socket.c:2519
 ___sys_sendmsg net/socket.c:2573 [inline]
 __sys_sendmsg+0x25c/0x320 net/socket.c:2602
 __do_sys_sendmsg net/socket.c:2611 [inline]
 __se_sys_sendmsg net/socket.c:2609 [inline]
 __arm64_sys_sendmsg+0x80/0x94 net/socket.c:2609
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585

Crashes (1438):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/06/18 11:11 linux-6.1.y 58485ff1a74f e77fae15 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/06/18 08:46 linux-6.1.y 58485ff1a74f e77fae15 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/05/25 06:51 linux-6.1.y da3c5173c55f ed351ea7 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/05/25 06:02 linux-6.1.y da3c5173c55f ed351ea7 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/05/25 05:12 linux-6.1.y da3c5173c55f ed351ea7 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/01/04 19:17 linux-6.1.y 7dc732d24ff7 f3558dbf .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2024/12/27 11:18 linux-6.1.y 29f02ec58a94 d3ccff63 .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2024/10/27 03:00 linux-6.1.y 7ec6f9fa3d97 65e8686b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2024/10/27 01:37 linux-6.1.y 7ec6f9fa3d97 65e8686b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2024/10/26 23:17 linux-6.1.y 7ec6f9fa3d97 65e8686b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2024/10/26 20:47 linux-6.1.y 7ec6f9fa3d97 65e8686b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2024/10/26 19:28 linux-6.1.y 7ec6f9fa3d97 65e8686b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2024/10/26 17:15 linux-6.1.y 7ec6f9fa3d97 65e8686b .config console log report syz / log C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2024/03/30 18:32 linux-6.1.y e5cd595e23c1 6baf5069 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2024/02/12 01:46 linux-6.1.y f1bb70486c9c 77b23aa1 .config console log report syz C [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/05/18 21:48 linux-6.1.y 325285d9fc86 f41472b0 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/05/06 16:32 linux-6.1.y ac7079a42ea5 ae98e6b9 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2024/10/27 13:44 linux-6.1.y 7ec6f9fa3d97 65e8686b .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/01/26 01:46 linux-6.1.y 75cefdf153f5 9fbd772e .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2024/12/08 09:18 linux-6.1.y e4d90d63d385 9ac0fdc6 .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2024/10/27 13:33 linux-6.1.y 7ec6f9fa3d97 65e8686b .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2024/10/27 12:53 linux-6.1.y 7ec6f9fa3d97 65e8686b .config console log report syz / log [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/06/22 17:18 linux-6.1.y 58485ff1a74f d6cdfb8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in sta_remove_link
2025/06/21 07:10 linux-6.1.y 58485ff1a74f d6cdfb8a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in sta_remove_link
2025/06/20 09:22 linux-6.1.y 58485ff1a74f ed3e87f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/06/19 21:48 linux-6.1.y 58485ff1a74f ed3e87f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/06/19 07:53 linux-6.1.y 58485ff1a74f ed3e87f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/06/14 01:56 linux-6.1.y 58485ff1a74f 0e8da31f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in sta_remove_link
2025/06/13 18:36 linux-6.1.y 58485ff1a74f 98683f8f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/06/13 16:31 linux-6.1.y 58485ff1a74f 98683f8f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/06/13 09:07 linux-6.1.y 58485ff1a74f 98683f8f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/06/13 05:47 linux-6.1.y 58485ff1a74f 98683f8f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/06/11 07:03 linux-6.1.y 58485ff1a74f 5d7e17ca .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/06/10 23:37 linux-6.1.y 58485ff1a74f 5d7e17ca .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/06/09 13:17 linux-6.1.y 58485ff1a74f 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in sta_remove_link
2025/06/08 22:45 linux-6.1.y 58485ff1a74f 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/06/08 10:02 linux-6.1.y 58485ff1a74f 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/06/07 19:24 linux-6.1.y 58485ff1a74f 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/06/07 13:08 linux-6.1.y 58485ff1a74f 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in sta_remove_link
2025/06/07 10:03 linux-6.1.y 58485ff1a74f 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/06/06 15:33 linux-6.1.y 58485ff1a74f 9fa58bba .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/06/04 13:04 linux-6.1.y da3c5173c55f e565f08d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in sta_remove_link
2025/06/03 23:42 linux-6.1.y da3c5173c55f a30356b7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/06/03 13:01 linux-6.1.y da3c5173c55f a30356b7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/06/02 13:52 linux-6.1.y da3c5173c55f b396b4bf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in sta_remove_link
2025/06/02 05:13 linux-6.1.y da3c5173c55f 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/06/01 21:05 linux-6.1.y da3c5173c55f 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/06/01 08:10 linux-6.1.y da3c5173c55f 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/06/01 00:48 linux-6.1.y da3c5173c55f 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/05/31 23:44 linux-6.1.y da3c5173c55f 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/05/30 23:34 linux-6.1.y da3c5173c55f 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/05/30 15:43 linux-6.1.y da3c5173c55f 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/05/26 04:58 linux-6.1.y da3c5173c55f 2d4582d0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/05/25 20:55 linux-6.1.y da3c5173c55f 2d4582d0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in sta_remove_link
2025/05/25 16:46 linux-6.1.y da3c5173c55f ed351ea7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/06/19 20:35 linux-6.1.y 58485ff1a74f ed3e87f7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/06/13 16:59 linux-6.1.y 58485ff1a74f 98683f8f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/06/12 22:34 linux-6.1.y 58485ff1a74f 98683f8f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/06/09 14:02 linux-6.1.y 58485ff1a74f 4826c28e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/06/04 21:13 linux-6.1.y 58485ff1a74f e565f08d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/06/04 17:56 linux-6.1.y 58485ff1a74f e565f08d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/06/04 04:31 linux-6.1.y da3c5173c55f a30356b7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/05/30 13:21 linux-6.1.y da3c5173c55f 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/05/30 13:21 linux-6.1.y da3c5173c55f 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/05/29 07:29 linux-6.1.y da3c5173c55f 3d2f584d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/05/28 13:08 linux-6.1.y da3c5173c55f 874a1386 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/05/26 23:35 linux-6.1.y da3c5173c55f 874a1386 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/05/26 09:11 linux-6.1.y da3c5173c55f 2d4582d0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/05/26 01:50 linux-6.1.y da3c5173c55f 2d4582d0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2024/02/11 20:48 linux-6.1.y f1bb70486c9c 77b23aa1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
* Struck through repros no longer work on HEAD.