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To: 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: 20a33c6b6cbe Add linux-next specific files for 20261023 git tree: git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git console output: https://syzkaller.appspot.com/x/log.txt?x=15cf1aa5580000 kernel config: https://syzkaller.appspot.com/x/.config?x=82b79abce6d1b17c dashboard link: https://syzkaller.appspot.com/bug?extid=c38f93f387ac25eabf68 compiler: Debian clang version 22.1.8 (1~deb13u4), Debian LLD 22.1.8 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=117f4d8e580000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+c38f93f387ac25eabf68@syzkaller.appspotmail.com ------------[ cut here ]------------ syzkaller0: Failed check-sdata-in-driver check, flags: 0x0 WARNING: net/mac80211/driver-ops.h:1380 at drv_wake_tx_queue net/mac80211/driver-ops.h:1380 [inline], CPU#1: syz-executor116/6060 WARNING: net/mac80211/driver-ops.h:1380 at schedule_and_wake_txq net/mac80211/driver-ops.h:1391 [inline], CPU#1: syz-executor116/6060 WARNING: net/mac80211/driver-ops.h:1380 at ieee80211_queue_skb+0x1cb4/0x22e0 net/mac80211/tx.c:1729, CPU#1: syz-executor116/6060 Modules linked in: CPU: 1 UID: 0 PID: 6060 Comm: syz-executor116 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026 RIP: 0010:drv_wake_tx_queue net/mac80211/driver-ops.h:1380 [inline] RIP: 0010:schedule_and_wake_txq net/mac80211/driver-ops.h:1391 [inline] RIP: 0010:ieee80211_queue_skb+0x1cfc/0x22e0 net/mac80211/tx.c:1729 Code: 00 00 48 85 c0 4c 0f 44 e5 48 b8 00 00 00 00 00 fc ff df 41 0f b6 44 05 00 84 c0 0f 85 6d 04 00 00 41 8b 16 4c 89 ff 4c 89 e6 <67> 48 0f b9 3a 49 bf 00 00 00 00 00 fc ff df e9 b5 fa ff ff e8 bb RSP: 0018:ffffc90003316f70 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88805ac32d90 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: ffff88805ac30120 RDI: ffffffff91d2d970 RBP: ffff88805ac319f0 R08: ffffffff91c0abbf R09: 1ffffffff2381577 R10: dffffc0000000000 R11: fffffbfff2381578 R12: ffff88805ac30120 R13: 1ffff1100b58633c R14: ffff88805ac319e0 R15: ffffffff91d2d970 FS: 00007f837dd626c0(0000) GS:ffff88812347c000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f837e562ff8 CR3: 0000000013544000 CR4: 00000000003526f0 Call Trace: __ieee80211_xmit_fast+0x8ea/0x2160 net/mac80211/tx.c:3862 ieee80211_xmit_fast net/mac80211/tx.c:3930 [inline] __ieee80211_subif_start_xmit+0x1367/0x1840 net/mac80211/tx.c:4489 ieee80211_subif_start_xmit+0xee/0x560 net/mac80211/tx.c:4726 __netdev_start_xmit include/linux/netdevice.h:5455 [inline] netdev_start_xmit include/linux/netdevice.h:5464 [inline] xmit_one net/core/dev.c:4057 [inline] dev_hard_start_xmit+0x2cd/0x830 net/core/dev.c:4073 __dev_queue_xmit+0x14d1/0x3920 net/core/dev.c:5066 packet_snd net/packet/af_packet.c:3157 [inline] packet_sendmsg+0x3f1b/0x51b0 net/packet/af_packet.c:3189 sock_sendmsg_nosec+0x14e/0x190 net/socket.c:800 __sock_sendmsg net/socket.c:818 [inline] __sys_sendto+0x408/0x5a0 net/socket.c:2283 __do_sys_sendto net/socket.c:2290 [inline] __se_sys_sendto net/socket.c:2286 [inline] __x64_sys_sendto+0xde/0x100 net/socket.c:2286 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: 0033:0x7f837e5c51de Code: 08 0f 85 f5 e2 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 90 41 57 41 56 4d 89 c6 41 55 4d 89 cd 41 54 55 53 48 83 ec 08 RSP: 002b:00007f837dd620b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f837dd626c0 RCX: 00007f837e5c51de RDX: 000000000000003c RSI: 00007f837dd62140 RDI: 0000000000000004 RBP: 00007f837dd62120 R08: 00007f837dd62120 R09: 0000000000000014 R10: 0000000000000040 R11: 0000000000000246 R12: 00007f837dd62180 R13: 0000000000000013 R14: 00007ffe6cb13b50 R15: 00007ffe6cb13c38 ---------------- Code disassembly (best guess): 0: 00 00 add %al,(%rax) 2: 48 85 c0 test %rax,%rax 5: 4c 0f 44 e5 cmove %rbp,%r12 9: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 10: fc ff df 13: 41 0f b6 44 05 00 movzbl 0x0(%r13,%rax,1),%eax 19: 84 c0 test %al,%al 1b: 0f 85 6d 04 00 00 jne 0x48e 21: 41 8b 16 mov (%r14),%edx 24: 4c 89 ff mov %r15,%rdi 27: 4c 89 e6 mov %r12,%rsi * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 49 bf 00 00 00 00 00 movabs $0xdffffc0000000000,%r15 36: fc ff df 39: e9 b5 fa ff ff jmp 0xfffffaf3 3e: e8 .byte 0xe8 3f: bb .byte 0xbb --- 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