Hello, syzbot found the following issue on: HEAD commit: 429fde2d81bc net: tun: fix tun_napi_alloc_frags() git tree: net console output: https://syzkaller.appspot.com/x/log.txt?x=1017da0f980000 kernel config: https://syzkaller.appspot.com/x/.config?x=fee25f93665c89ac dashboard link: https://syzkaller.appspot.com/bug?extid=433ee38d8684adcfbeb9 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/34e1be018333/disk-429fde2d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/ec564480cb6e/vmlinux-429fde2d.xz kernel image: https://storage.googleapis.com/syzbot-assets/7d9902c93ef5/bzImage-429fde2d.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+433ee38d8684adcfbeb9@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ Invalid VIF (ffff88807e14e9d0) magic 0x0, 08:02:11:00:00:01, 3/1 WARNING: CPU: 0 PID: 5908 at drivers/net/wireless/virtual/mac80211_hwsim.c:237 hwsim_check_magic drivers/net/wireless/virtual/mac80211_hwsim.c:235 [inline] WARNING: CPU: 0 PID: 5908 at drivers/net/wireless/virtual/mac80211_hwsim.c:237 mac80211_hwsim_tx+0x1b6f/0x23c0 drivers/net/wireless/virtual/mac80211_hwsim.c:2026 Modules linked in: CPU: 0 UID: 0 PID: 5908 Comm: kworker/0:6 Not tainted 6.13.0-rc2-syzkaller-00131-g429fde2d81bc #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 Workqueue: mld mld_ifc_work RIP: 0010:hwsim_check_magic drivers/net/wireless/virtual/mac80211_hwsim.c:235 [inline] RIP: 0010:mac80211_hwsim_tx+0x1b6f/0x23c0 drivers/net/wireless/virtual/mac80211_hwsim.c:2026 Code: 28 84 c0 0f 85 06 08 00 00 45 0f b6 8e 61 04 00 00 48 c7 c7 40 2a a9 8c 4c 89 f6 44 89 e2 48 89 e9 41 89 d8 e8 52 e7 50 fa 90 <0f> 0b 90 90 e9 69 f2 ff ff e8 d3 3d 90 fa 90 0f 0b 90 e9 d5 f2 ff RSP: 0018:ffffc9000479ebf0 EFLAGS: 00010246 RAX: 8672fc10cd8df200 RBX: 0000000000000003 RCX: ffff888031a21e00 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff88807e14ee2a R08: ffffffff81600a42 R09: fffffbfff1cfa210 R10: dffffc0000000000 R11: fffffbfff1cfa210 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff88807e14e9d0 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f48a26a56c0 CR3: 0000000061e5a000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> drv_tx net/mac80211/driver-ops.h:37 [inline] wake_tx_push_queue net/mac80211/util.c:298 [inline] ieee80211_handle_wake_tx_queue+0x1ae/0x2d0 net/mac80211/util.c:315 drv_wake_tx_queue net/mac80211/driver-ops.h:1362 [inline] schedule_and_wake_txq net/mac80211/driver-ops.h:1369 [inline] ieee80211_queue_skb+0x1ae9/0x24b0 net/mac80211/tx.c:1664 ieee80211_tx+0x2c4/0x470 net/mac80211/tx.c:1967 __ieee80211_subif_start_xmit+0xe93/0x1600 net/mac80211/tx.c:4339 ieee80211_subif_start_xmit+0xde/0x4d0 net/mac80211/tx.c:4533 __netdev_start_xmit include/linux/netdevice.h:5002 [inline] netdev_start_xmit include/linux/netdevice.h:5011 [inline] xmit_one net/core/dev.c:3590 [inline] dev_hard_start_xmit+0x27a/0x7d0 net/core/dev.c:3606 __dev_queue_xmit+0x1b73/0x3f50 net/core/dev.c:4434 neigh_output include/net/neighbour.h:539 [inline] ip6_finish_output2+0x12c7/0x17b0 net/ipv6/ip6_output.c:141 ip6_finish_output+0x41e/0x840 net/ipv6/ip6_output.c:226 NF_HOOK+0x9e/0x430 include/linux/netfilter.h:314 mld_sendpack+0x843/0xdb0 net/ipv6/mcast.c:1819 mld_send_cr net/ipv6/mcast.c:2120 [inline] mld_ifc_work+0x7d9/0xd90 net/ipv6/mcast.c:2651 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa66/0x1840 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> --- 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@xxxxxxxxxxxxxxxx. 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 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
