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AKwUvBwf3CgqQbm8N9f1JFk6cGDQzob7xtewlcF9oTxP6PcT/vQ0nQGoKqf8LTvJN6ea8VgyRYKRpV3Pn+qpC1Q=@vger.kernel.org X-Gm-Message-State: AFuF++mh5gOmYpfZ8zuBEaSQNiogX5qIXyub6ZBoznormc1zGA/Rddqi DUvS8YX+kt9uR5NWGYOJgif7a6jYfW1c5qxPU2IsydcZ/Ti3cqCpXMOdAHoxMW58yl9M7a5Xm+S Mm25uhW7Xc2w+d5VzWxqN3WcaatE6UNUtwqH8wLp4xnqHOBkwcl9NqvtdOZ0= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:810a:b0:6b1:bdd9:453 with SMTP id 006d021491bc7-6b6faee1fa2mr23686398eaf.12.1788993886341; Wed, 09 Sep 2026 15:44:46 -0700 (PDT) Date: Wed, 09 Sep 2026 15:44:46 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6aa1e15e.f81106d8.2ab401.0003.GAE@google.com> Subject: [syzbot] [wireless?] BUG: using smp_processor_id() in preemptible code in ieee80211_tx_control_port From: syzbot To: johannes@sipsolutions.net, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: a9d7ced84989 Add linux-next specific files for 20260908 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=149cfaf9580000 kernel config: https://syzkaller.appspot.com/x/.config?x=17eeb09695a2b3c9 dashboard link: https://syzkaller.appspot.com/bug?extid=d979bd35c8a76fd1b6f5 compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=129cfaf9580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=139866f9580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/4f470407358e/disk-a9d7ced8.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/858b9d7ba687/vmlinux-a9d7ced8.xz kernel image: https://storage.googleapis.com/syzbot-assets/ef971d22d75f/bzImage-a9d7ced8.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d979bd35c8a76fd1b6f5@syzkaller.appspotmail.com BUG: using smp_processor_id() in preemptible [00000000] code: syz-executor240/5639 caller is dev_sw_netstats_tx_add include/linux/netdevice.h:3086 [inline] caller is ieee80211_tx_control_port+0xac7/0x1100 net/mac80211/tx.c:6656 CPU: 0 UID: 0 PID: 5639 Comm: syz-executor240 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 check_preemption_disabled+0xcd/0xd0 lib/smp_processor_id.c:47 dev_sw_netstats_tx_add include/linux/netdevice.h:3086 [inline] ieee80211_tx_control_port+0xac7/0x1100 net/mac80211/tx.c:6656 rdev_tx_control_port net/wireless/rdev-ops.h:783 [inline] nl80211_tx_control_port+0x624/0x960 net/wireless/nl80211.c:18603 genl_family_rcv_msg_doit+0x233/0x340 net/netlink/genetlink.c:1114 genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline] genl_rcv_msg+0x614/0x7a0 net/netlink/genetlink.c:1209 netlink_rcv_skb+0x226/0x4a0 net/netlink/af_netlink.c:2556 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x7bd/0x940 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x7c3/0xae0 net/netlink/af_netlink.c:1900 sock_sendmsg_nosec+0x13a/0x180 net/socket.c:800 __sock_sendmsg net/socket.c:815 [inline] ____sys_sendmsg+0x54e/0x850 net/socket.c:2713 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2767 __sys_sendmsg net/socket.c:2799 [inline] __do_sys_sendmsg net/socket.c:2804 [inline] __se_sys_sendmsg net/socket.c:2802 [inline] __x64_sys_sendmsg+0x1b1/0x290 net/socket.c:2802 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f2fe280ba69 Code: c0 79 93 eb d5 48 8d 7c 1d 00 eb 99 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 d0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffc9ac26a08 EFLAGS: 00000246 ORIG_RAX: 000000000000002e --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup