GRED: Unable to relocate VQ 0x0 after dequeue, screwing up backlog
------------[ cut here ]------------
kernel BUG at net/core/gro.c:424!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 0 PID: 11054 Comm: syz-executor.3 Not tainted 6.9.0-syzkaller-12171-gccf23c916ca3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:gro_pull_from_frag0 net/core/gro.c:424 [inline]
RIP: 0010:gro_try_pull_from_frag0 net/core/gro.c:446 [inline]
RIP: 0010:dev_gro_receive+0x242f/0x24b0 net/core/gro.c:571
Code: ff d3 66 90 e9 ea fa ff ff 44 89 f1 80 e1 07 38 c1 0f 8c f1 f9 ff ff 4c 89 f7 e8 ec b3 92 f8 e9 e4 f9 ff ff e8 32 07 2d f8 90 <0f> 0b 89 d9 80 e1 07 fe c1 38 c1 0f 8c 19 fa ff ff 48 89 df e8 f8
RSP: 0018:ffffc90000007b08 EFLAGS: 00010246
RAX: ffffffff89690d4e RBX: 00000000000000be RCX: ffff888060738000
RDX: 0000000000000101 RSI: 0000000000000008 RDI: 0000000000000002
RBP: 0000000000000002 R08: ffffffff8968ffbb R09: 1ffffffff1f5a6bd
R10: dffffc0000000000 R11: fffffbfff1f5a6be R12: 1ffff11005bb0526
R13: 0000000000000008 R14: ffff88802dd82934 R15: 1ffff11005bb0531
FS:  00007f86b06bf6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000082 CR3: 0000000065062000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 napi_gro_receive+0x3c3/0xc90 net/core/gro.c:639
 gro_cell_poll+0x13c/0x1c0 net/core/gro_cells.c:61
 __napi_poll+0xcb/0x490 net/core/dev.c:6721
 napi_poll net/core/dev.c:6790 [inline]
 net_rx_action+0x7bb/0x10a0 net/core/dev.c:6906
 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554
 do_softirq+0x11b/0x1e0 kernel/softirq.c:455
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382
 tun_rx_batched+0x732/0x8f0
 tun_get_user+0x2f35/0x4560 drivers/net/tun.c:2002
 tun_chr_write_iter+0x113/0x1f0 drivers/net/tun.c:2048
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0xa72/0xc90 fs/read_write.c:590
 ksys_write+0x1a0/0x2c0 fs/read_write.c:643
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f86af87bc2f
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 b9 80 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 0c 81 02 00 48
RSP: 002b:00007f86b06bf090 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f86af9b3fa0 RCX: 00007f86af87bc2f
RDX: 000000000000007e RSI: 0000000020000080 RDI: 00000000000000c8
RBP: 00007f86af8c947f R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000007e R11: 0000000000000293 R12: 0000000000000000
R13: 000000000000000b R14: 00007f86af9b3fa0 R15: 00007ffc2190c938
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:gro_pull_from_frag0 net/core/gro.c:424 [inline]
RIP: 0010:gro_try_pull_from_frag0 net/core/gro.c:446 [inline]
RIP: 0010:dev_gro_receive+0x242f/0x24b0 net/core/gro.c:571
Code: ff d3 66 90 e9 ea fa ff ff 44 89 f1 80 e1 07 38 c1 0f 8c f1 f9 ff ff 4c 89 f7 e8 ec b3 92 f8 e9 e4 f9 ff ff e8 32 07 2d f8 90 <0f> 0b 89 d9 80 e1 07 fe c1 38 c1 0f 8c 19 fa ff ff 48 89 df e8 f8
RSP: 0018:ffffc90000007b08 EFLAGS: 00010246
RAX: ffffffff89690d4e RBX: 00000000000000be RCX: ffff888060738000
RDX: 0000000000000101 RSI: 0000000000000008 RDI: 0000000000000002
RBP: 0000000000000002 R08: ffffffff8968ffbb R09: 1ffffffff1f5a6bd
R10: dffffc0000000000 R11: fffffbfff1f5a6be R12: 1ffff11005bb0526
R13: 0000000000000008 R14: ffff88802dd82934 R15: 1ffff11005bb0531
FS:  00007f86b06bf6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000082 CR3: 0000000065062000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400