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AHgh+RrWBRAgGpV36tEIXtpQj/RCnk8wpu0TU3F4Qomxm6jxLaKtEsx2iUYp2esouhH+vIT0AFA9Xabi+bIA7Jo=@vger.kernel.org X-Gm-Message-State: AOJu0Yz0xA9CdwZsWX5Vq6nJFfZTZ+HBIidFw7PEjiVsR+IicKV6k3wJ qKdO+nZ4YZRpEPEiNqKJcviZFyHVRaKGyXjR0KRAj8M+Hm89edjC9RI026oqbpda0n7HioBhurK hllfmZj9teHscHyouHLynsVamE8tVurCq3a7FxTB03QbUfELp4grpAU4Ghak= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:81c8:b0:6b0:ace7:c413 with SMTP id 006d021491bc7-6b0d5fd3426mr1361902eaf.6.1786655130674; Thu, 13 Aug 2026 14:05:30 -0700 (PDT) Date: Thu, 13 Aug 2026 14:05:30 -0700 In-Reply-To: <699fbc78.050a0220.1cd54b.000b.GAE@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a7e319a.ec5dc6cc.21cb3f.00bb.GAE@google.com> Subject: Re: [syzbot] [wireless?] WARNING in ieee80211_set_active_links (3) 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" syzbot has found a reproducer for the following issue on: HEAD commit: 3aa1dcaa4f6f Revert "wifi: mt76: Disable napi when removin.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11f09c79580000 kernel config: https://syzkaller.appspot.com/x/.config?x=c44651ea7dd2f307 dashboard link: https://syzkaller.appspot.com/bug?extid=582469b3a9ef5f13606b compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15747225580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+582469b3a9ef5f13606b@syzkaller.appspotmail.com ------------[ cut here ]------------ sta0: Failed check-sdata-in-driver check, flags: 0x0 WARNING: net/mac80211/driver-ops.h:1723 at drv_can_activate_links net/mac80211/driver-ops.h:1723 [inline], CPU#0: kworker/u33:4/93 WARNING: net/mac80211/driver-ops.h:1723 at ieee80211_set_active_links+0x2d0/0x970 net/mac80211/link.c:651, CPU#0: kworker/u33:4/93 Modules linked in: CPU: 0 UID: 0 PID: 93 Comm: kworker/u33:4 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Workqueue: events_unbound cfg80211_wiphy_work RIP: 0010:drv_can_activate_links net/mac80211/driver-ops.h:1723 [inline] RIP: 0010:ieee80211_set_active_links+0x2d7/0x970 net/mac80211/link.c:651 Code: 05 00 00 e8 5b de da f6 48 8b 34 24 48 81 c6 20 01 00 00 48 89 34 24 e8 47 de da f6 48 8d 3d e0 87 03 06 48 8b 34 24 44 89 fa <67> 48 0f b9 3a e9 e0 fe ff ff e8 2a de da f6 0f b7 c5 4c 8d bb 50 RSP: 0018:ffffc9000165faf8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff888038876c70 RCX: ffffffff8b2f94de RDX: 0000000000000000 RSI: ffff888038874120 RDI: ffffffff91331d20 RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff888038875928 R13: 0000000000000000 R14: ffff888101a90f40 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880d5de9000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000562bad7c5000 CR3: 000000000e994000 CR4: 0000000000352ef0 Call Trace: ieee80211_if_parse_active_links+0xbb/0x120 net/mac80211/debugfs_netdev.c:732 wiphy_locked_debugfs_write_work+0xe6/0x1c0 net/wireless/debugfs.c:248 cfg80211_wiphy_work+0x2b7/0x550 net/wireless/core.c:538 process_one_work+0xa23/0x1940 kernel/workqueue.c:3322 process_scheduled_works kernel/workqueue.c:3405 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3486 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 00 00 add %al,(%rax) 2: e8 5b de da f6 call 0xf6dade62 7: 48 8b 34 24 mov (%rsp),%rsi b: 48 81 c6 20 01 00 00 add $0x120,%rsi 12: 48 89 34 24 mov %rsi,(%rsp) 16: e8 47 de da f6 call 0xf6dade62 1b: 48 8d 3d e0 87 03 06 lea 0x60387e0(%rip),%rdi # 0x6038802 22: 48 8b 34 24 mov (%rsp),%rsi 26: 44 89 fa mov %r15d,%edx * 29: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2e: e9 e0 fe ff ff jmp 0xffffff13 33: e8 2a de da f6 call 0xf6dade62 38: 0f b7 c5 movzwl %bp,%eax 3b: 4c rex.WR 3c: 8d .byte 0x8d 3d: bb .byte 0xbb 3e: 50 push %rax --- 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.