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: 364d, last: 1h34m
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
6.1.123-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-executor847/4291:
 #0: ffff80001811f250 (cb_lock){++++}-{3:3}, at: genl_rcv+0x28/0x50 net/netlink/genetlink.c:860
 #1: ffff0000d15407c8 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: wiphy_lock include/net/cfg80211.h:5639 [inline]
 #1: ffff0000d15407c8 (&rdev->wiphy.mtx){+.+.}-{3:3}, at: nl80211_pre_doit+0x484/0x764 net/wireless/nl80211.c:16303
 #2: ffff0000d1428d40 (&wdev->mtx){+.+.}-{3:3}, at: wdev_lock net/wireless/core.h:231 [inline]
 #2: ffff0000d1428d40 (&wdev->mtx){+.+.}-{3:3}, at: nl80211_new_station+0x1434/0x1c64 net/wireless/nl80211.c:7414

stack backtrace:
CPU: 0 PID: 4291 Comm: syz-executor847 Not tainted 6.1.123-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call trace:
 dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 dump_stack+0x1c/0x58 lib/dump_stack.c:113
 lockdep_rcu_suspicious+0x260/0x464 kernel/locking/lockdep.c:6608
 sta_remove_link+0x38c/0x474 net/mac80211/sta_info.c:360
 sta_info_free+0x68/0x2ec net/mac80211/sta_info.c:405
 ieee80211_add_station+0x308/0x4e4 net/mac80211/cfg.c:1979
 rdev_add_station+0x158/0x3e0 net/wireless/rdev-ops.h:201
 nl80211_new_station+0x1500/0x1c64 net/wireless/nl80211.c:7430
 genl_family_rcv_msg_doit net/netlink/genetlink.c:756 [inline]
 genl_family_rcv_msg net/netlink/genetlink.c:833 [inline]
 genl_rcv_msg+0x948/0xc2c net/netlink/genetlink.c:850
 netlink_rcv_skb+0x20c/0x3b8 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+0x65c/0x898 net/netlink/af_netlink.c:1337
 netlink_sendmsg+0x834/0xb18 net/netlink/af_netlink.c:1859
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 ____sys_sendmsg+0x55c/0x848 net/socket.c:2519
 ___sys_sendmsg net/socket.c:2573 [inline]
 __sys_sendmsg+0x26c/0x33c 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+0x58/0x168 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 (768):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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
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
2025/02/10 07:48 linux-6.1.y 0cbb5f65e52f ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/02/10 04:10 linux-6.1.y 0cbb5f65e52f ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/02/10 00:09 linux-6.1.y 0cbb5f65e52f ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/02/09 18:05 linux-6.1.y 0cbb5f65e52f ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/02/09 04:35 linux-6.1.y 0cbb5f65e52f ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/02/08 16:40 linux-6.1.y 0cbb5f65e52f ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/02/07 03:06 linux-6.1.y 0cbb5f65e52f 8002dd28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/02/05 10:43 linux-6.1.y 0cbb5f65e52f 5896748e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/02/05 03:00 linux-6.1.y 0cbb5f65e52f 5896748e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/02/04 11:39 linux-6.1.y 0cbb5f65e52f 8f267cef .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/02/04 11:32 linux-6.1.y 0cbb5f65e52f 8f267cef .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/02/04 08:17 linux-6.1.y 0cbb5f65e52f 8f267cef .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/02/02 11:47 linux-6.1.y 0cbb5f65e52f 568559e4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/02/01 10:44 linux-6.1.y 75cefdf153f5 aa47157c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/02/01 02:49 linux-6.1.y 75cefdf153f5 aa47157c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/02/01 01:29 linux-6.1.y 75cefdf153f5 aa47157c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/01/31 05:03 linux-6.1.y 75cefdf153f5 4c6ac32f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/01/30 10:28 linux-6.1.y 75cefdf153f5 afe4eff5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/01/29 07:15 linux-6.1.y 75cefdf153f5 865ef71e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan WARNING: suspicious RCU usage in sta_remove_link
2025/01/16 17:25 linux-6.1.y c63962be84ef f9e07a6e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-perf WARNING: suspicious RCU usage in sta_remove_link
2025/02/10 05:36 linux-6.1.y 0cbb5f65e52f ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/02/09 22:02 linux-6.1.y 0cbb5f65e52f ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/02/09 21:58 linux-6.1.y 0cbb5f65e52f ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/02/09 13:16 linux-6.1.y 0cbb5f65e52f ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/02/08 06:22 linux-6.1.y 0cbb5f65e52f ef44b750 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/02/06 22:47 linux-6.1.y 0cbb5f65e52f 8002dd28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/02/06 20:59 linux-6.1.y 0cbb5f65e52f 8002dd28 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/02/05 08:35 linux-6.1.y 0cbb5f65e52f 5896748e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/02/05 00:10 linux-6.1.y 0cbb5f65e52f 5896748e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/02/04 15:24 linux-6.1.y 0cbb5f65e52f 8f267cef .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/02/04 14:06 linux-6.1.y 0cbb5f65e52f 8f267cef .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/02/04 05:26 linux-6.1.y 0cbb5f65e52f 8f267cef .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/02/03 21:51 linux-6.1.y 0cbb5f65e52f a21a8419 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/02/03 20:25 linux-6.1.y 0cbb5f65e52f a21a8419 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/02/02 17:51 linux-6.1.y 0cbb5f65e52f 568559e4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/02/02 09:50 linux-6.1.y 0cbb5f65e52f 568559e4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/02/02 09:50 linux-6.1.y 0cbb5f65e52f 568559e4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/02/02 07:08 linux-6.1.y 0cbb5f65e52f 568559e4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/02/02 05:17 linux-6.1.y 0cbb5f65e52f 568559e4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/02/01 13:34 linux-6.1.y 75cefdf153f5 aa47157c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/02/01 08:49 linux-6.1.y 75cefdf153f5 aa47157c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/01/31 23:36 linux-6.1.y 75cefdf153f5 aa47157c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/01/30 21:31 linux-6.1.y 75cefdf153f5 4c6ac32f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/01/30 20:52 linux-6.1.y 75cefdf153f5 4c6ac32f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/01/30 08:40 linux-6.1.y 75cefdf153f5 afe4eff5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/01/30 02:08 linux-6.1.y 75cefdf153f5 136953f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/01/29 21:59 linux-6.1.y 75cefdf153f5 136953f1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 WARNING: suspicious RCU usage in sta_remove_link
2025/01/29 20:00 linux-6.1.y 75cefdf153f5 136953f1 .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.