------------[ cut here ]------------ Too BIG xdp->frame_sz = 131072 WARNING: CPU: 2 PID: 6784 at net/core/filter.c:4120 ____bpf_xdp_adjust_tail net/core/filter.c:4120 [inline] WARNING: CPU: 2 PID: 6784 at net/core/filter.c:4120 bpf_xdp_adjust_tail+0x461/0x9a0 net/core/filter.c:4102 Modules linked in: CPU: 2 PID: 6784 Comm: syz-executor.2 Not tainted 6.4.0-rc5-syzkaller-00002-gf8dba31b0a82 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 RIP: 0010:____bpf_xdp_adjust_tail net/core/filter.c:4120 [inline] RIP: 0010:bpf_xdp_adjust_tail+0x461/0x9a0 net/core/filter.c:4102 Code: ff 89 de e8 71 91 6b f9 84 db 0f 85 59 fd ff ff e8 84 95 6b f9 89 ee 48 c7 c7 00 c8 5e 8b c6 05 a3 37 4c 06 01 e8 9f 50 33 f9 <0f> 0b e9 38 fd ff ff e8 33 67 bd f9 e9 64 fc ff ff e8 29 67 bd f9 RSP: 0018:ffffc90003e7f780 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc900060dd000 RDX: 0000000000040000 RSI: ffffffff814b2417 RDI: 0000000000000001 RBP: 0000000000020000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 20474942206f6f54 R12: ffffffffffffffea R13: ffff888128e8feef R14: 0000000000000000 R15: ffffc90003e7fab0 FS: 00007f429fb13700(0000) GS:ffff88806b800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020010000 CR3: 0000000103a58000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ___bpf_prog_run+0x382a/0x7b30 kernel/bpf/core.c:1828 __bpf_prog_run32+0x9d/0xe0 kernel/bpf/core.c:2049 bpf_dispatcher_nop_func include/linux/bpf.h:1168 [inline] __bpf_prog_run include/linux/filter.h:600 [inline] bpf_prog_run_xdp include/linux/filter.h:775 [inline] bpf_prog_run_generic_xdp+0x572/0x1200 net/core/dev.c:4760 netif_receive_generic_xdp+0x2e8/0x7d0 net/core/dev.c:4846 do_xdp_generic net/core/dev.c:4905 [inline] do_xdp_generic+0x9a/0x1b0 net/core/dev.c:4898 tun_get_user+0x1bf3/0x3b00 drivers/net/tun.c:1919 tun_chr_write_iter+0xdf/0x200 drivers/net/tun.c:2043 call_write_iter include/linux/fs.h:1868 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x945/0xd50 fs/read_write.c:584 ksys_write+0x12b/0x250 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f429ee3deef Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 99 fd ff ff 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 cc fd ff ff 48 RSP: 002b:00007f429fb13130 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007f429efabf80 RCX: 00007f429ee3deef RDX: 000000000000fdef RSI: 0000000020000580 RDI: 00000000000000c8 RBP: 00007f429eee7ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000fdef R11: 0000000000000293 R12: 0000000000000000 R13: 00007ffc5a1f7bdf R14: 00007f429fb13300 R15: 0000000000022000