skbuff: skb_over_panic: text:ffffffff844a6560 len:428 put:172 head:ffff88811d705800 data:ffff88811d705800 tail:0x1ac end:0x140 dev: ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:205! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 0 UID: 101 PID: 3638 Comm: dhcpcd Not tainted 6.11.0-rc3-syzkaller-00046-g82313624b2ae #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:skb_panic+0x157/0x1d0 net/core/skbuff.c:205 Code: b6 04 01 84 c0 74 04 3c 03 7e 21 8b 4b 70 41 56 45 89 e8 48 c7 c7 c0 6e f6 87 41 57 56 48 89 ee 52 4c 89 e2 e8 0a 01 6d fb 90 <0f> 0b 4c 89 4c 24 10 48 89 54 24 08 48 89 34 24 e8 14 48 e1 fb 4c RSP: 0018:ffffc9000212f228 EFLAGS: 00010282 RAX: 0000000000000089 RBX: ffff8881215568c0 RCX: ffffffff81341ae9 RDX: 0000000000000000 RSI: ffffffff8134aec6 RDI: 0000000000000005 RBP: ffffffff87f68220 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000403 R11: 0000000000000001 R12: ffffffff844a6560 R13: 00000000000000ac R14: ffffffff87f66e80 R15: 0000000000000140 FS: 00007fa7412c4740(0000) GS:ffff8881f6200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff158c3978 CR3: 000000011d306000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_over_panic net/core/skbuff.c:210 [inline] skb_put+0x174/0x1b0 net/core/skbuff.c:2598 skb_put_zero include/linux/skbuff.h:2706 [inline] cdc_ncm_ndp16 drivers/net/usb/cdc_ncm.c:1136 [inline] cdc_ncm_fill_tx_frame+0x2930/0x38b0 drivers/net/usb/cdc_ncm.c:1311 cdc_ncm_tx_fixup+0xed/0x140 drivers/net/usb/cdc_ncm.c:1538 usbnet_start_xmit+0x15f/0x2450 drivers/net/usb/usbnet.c:1365 __netdev_start_xmit include/linux/netdevice.h:4913 [inline] netdev_start_xmit include/linux/netdevice.h:4922 [inline] xmit_one net/core/dev.c:3580 [inline] dev_hard_start_xmit+0x143/0x790 net/core/dev.c:3596 sch_direct_xmit+0x18e/0x840 net/sched/sch_generic.c:343 __dev_xmit_skb net/core/dev.c:3809 [inline] __dev_queue_xmit+0x138d/0x4300 net/core/dev.c:4389 dev_queue_xmit include/linux/netdevice.h:3105 [inline] packet_xmit+0x246/0x360 net/packet/af_packet.c:276 packet_snd net/packet/af_packet.c:3145 [inline] packet_sendmsg+0x26b2/0x53b0 net/packet/af_packet.c:3177 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg net/socket.c:745 [inline] sock_write_iter+0x50a/0x5c0 net/socket.c:1160 do_iter_readv_writev+0x531/0x800 fs/read_write.c:741 vfs_writev+0x36f/0xde0 fs/read_write.c:971 do_writev+0x287/0x370 fs/read_write.c:1018 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa741392e03 Code: 89 c7 48 89 44 24 08 e8 6a f2 f9 ff 48 8b 44 24 08 48 83 c4 28 c3 c3 64 8b 04 25 18 00 00 00 85 c0 75 20 b8 14 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 6d 48 8b 15 f6 5f 0d 00 f7 d8 64 89 02 48 83 RSP: 002b:00007fff158c3918 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 00007fff158d3bc8 RCX: 00007fa741392e03 RDX: 0000000000000002 RSI: 00007fff158c3930 RDI: 0000000000000005 RBP: 0000559f69e169c7 R08: 0000000042424242 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000559fa38090b0 R14: 00007fff158c39c8 R15: 00007fff158c3978 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:skb_panic+0x157/0x1d0 net/core/skbuff.c:205 Code: b6 04 01 84 c0 74 04 3c 03 7e 21 8b 4b 70 41 56 45 89 e8 48 c7 c7 c0 6e f6 87 41 57 56 48 89 ee 52 4c 89 e2 e8 0a 01 6d fb 90 <0f> 0b 4c 89 4c 24 10 48 89 54 24 08 48 89 34 24 e8 14 48 e1 fb 4c RSP: 0018:ffffc9000212f228 EFLAGS: 00010282 RAX: 0000000000000089 RBX: ffff8881215568c0 RCX: ffffffff81341ae9 RDX: 0000000000000000 RSI: ffffffff8134aec6 RDI: 0000000000000005 RBP: ffffffff87f68220 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000403 R11: 0000000000000001 R12: ffffffff844a6560 R13: 00000000000000ac R14: ffffffff87f66e80 R15: 0000000000000140 FS: 00007fa7412c4740(0000) GS:ffff8881f6200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fff158c3978 CR3: 000000011d306000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400