Hello, syzbot found the following issue on: HEAD commit: c76083fac3ba Add linux-next specific files for 20221226 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=1723da42480000 kernel config: https://syzkaller.appspot.com/x/.config?x=c217c755f1884ab6 dashboard link: https://syzkaller.appspot.com/bug?extid=30b72abaa17c07fe39dd compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14fc414c480000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1604b20a480000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/e388f26357fd/disk-c76083fa.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/e24f0bae36d5/vmlinux-c76083fa.xz kernel image: https://storage.googleapis.com/syzbot-assets/a5a69a059716/bzImage-c76083fa.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+30b72abaa17c07fe39dd@xxxxxxxxxxxxxxxxxxxxxxxxx skbuff: skb_over_panic: text:ffffffff8768d6f1 len:25109 put:25109 head:ffff88802b5ac000 data:ffff88802b5ac02c tail:0x6241 end:0xc0 dev:<NULL> ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:121! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 5072 Comm: vhost-5071 Not tainted 6.2.0-rc1-next-20221226-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:skb_panic+0x16c/0x16e net/core/skbuff.c:121 Code: f7 4c 8b 4c 24 10 8b 4b 70 41 56 45 89 e8 4c 89 e2 41 57 48 89 ee 48 c7 c7 40 04 5b 8b ff 74 24 10 ff 74 24 20 e8 09 8e bf ff <0f> 0b e8 1a 67 82 f7 4c 8b 64 24 18 e8 80 3d d0 f7 48 c7 c1 40 12 RSP: 0018:ffffc90003cefca0 EFLAGS: 00010282 RAX: 000000000000008d RBX: ffff88802b674500 RCX: 0000000000000000 RDX: ffff8880236bba80 RSI: ffffffff81663b9c RDI: fffff5200079df86 RBP: ffffffff8b5b1280 R08: 000000000000008d R09: 0000000000000000 R10: 0000000080000000 R11: 0000000000000000 R12: ffffffff8768d6f1 R13: 0000000000006215 R14: ffffffff8b5b0400 R15: 00000000000000c0 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000380 CR3: 000000002985f000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> skb_over_panic net/core/skbuff.c:126 [inline] skb_put.cold+0x24/0x24 net/core/skbuff.c:2218 virtio_vsock_skb_rx_put include/linux/virtio_vsock.h:56 [inline] vhost_vsock_alloc_skb drivers/vhost/vsock.c:374 [inline] vhost_vsock_handle_tx_kick+0xad1/0xd00 drivers/vhost/vsock.c:509 vhost_worker+0x241/0x3e0 drivers/vhost/vhost.c:364 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:skb_panic+0x16c/0x16e net/core/skbuff.c:121 Code: f7 4c 8b 4c 24 10 8b 4b 70 41 56 45 89 e8 4c 89 e2 41 57 48 89 ee 48 c7 c7 40 04 5b 8b ff 74 24 10 ff 74 24 20 e8 09 8e bf ff <0f> 0b e8 1a 67 82 f7 4c 8b 64 24 18 e8 80 3d d0 f7 48 c7 c1 40 12 RSP: 0018:ffffc90003cefca0 EFLAGS: 00010282 RAX: 000000000000008d RBX: ffff88802b674500 RCX: 0000000000000000 RDX: ffff8880236bba80 RSI: ffffffff81663b9c RDI: fffff5200079df86 RBP: ffffffff8b5b1280 R08: 000000000000008d R09: 0000000000000000 R10: 0000000080000000 R11: 0000000000000000 R12: ffffffff8768d6f1 R13: 0000000000006215 R14: ffffffff8b5b0400 R15: 00000000000000c0 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdc6f4a4298 CR3: 000000002985f000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
