IPVS: ftp: loaded support on port[0] = 21 BUG: unable to handle page fault for address: ffff887f927affff #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 9871 Comm: syz-executor878 Not tainted 5.6.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:is_multicast_ether_addr_64bits include/linux/etherdevice.h:135 [inline] RIP: 0010:netif_receive_generic_xdp net/core/dev.c:4565 [inline] RIP: 0010:do_xdp_generic.part.0+0x479/0x17a0 net/core/dev.c:4663 Code: 03 48 89 85 f0 fe ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 a5 78 ff ff ff 80 3c 02 00 48 89 8d c8 fe ff ff 0f 85 ac 10 00 00 <49> 8b 04 24 49 8d 7c 24 0c 48 ba 00 00 00 00 00 fc ff df 48 89 85 RSP: 0018:ffffc90008217770 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff8880927a0000 RCX: ffffffff0000feff RDX: 1ffff10ff24f5fff RSI: ffff8880927f0230 RDI: 0000000000000005 RBP: ffffc900082178b0 R08: ffff888093316200 R09: ffffed10124f405d R10: ffffed10124f405c R11: ffff8880927a02e3 R12: ffff887f927affff R13: 0000000000000100 R14: ffff8880927affff R15: ffff8880927f01c0 FS: 00000000022a9880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff887f927affff CR3: 0000000096671000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: do_xdp_generic+0x30/0x50 net/core/dev.c:4658 tun_get_user+0x2bcd/0x4020 drivers/net/tun.c:1935 tun_chr_write_iter+0xbd/0x156 drivers/net/tun.c:2026 call_write_iter include/linux/fs.h:1901 [inline] do_iter_readv_writev+0x5f8/0x8f0 fs/read_write.c:693 do_iter_write fs/read_write.c:998 [inline] do_iter_write+0x184/0x610 fs/read_write.c:979 vfs_writev+0x1b3/0x2f0 fs/read_write.c:1071 do_writev+0x15b/0x330 fs/read_write.c:1114 __do_sys_writev fs/read_write.c:1187 [inline] __se_sys_writev fs/read_write.c:1184 [inline] __x64_sys_writev+0x75/0xb0 fs/read_write.c:1184 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4416c0 Code: 05 48 3d 01 f0 ff ff 0f 83 fd 0e fc ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 3d 51 99 29 00 00 75 14 b8 14 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 d4 0e fc ff c3 48 83 ec 08 e8 7a 2b 00 00 RSP: 002b:00007ffd5d616308 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 00007ffd5d616320 RCX: 00000000004416c0 RDX: 0000000000000001 RSI: 00007ffd5d616350 RDI: 00000000000000f0 RBP: 0000000000000003 R08: 00000000bb1414ac R09: 00000000bb1414ac R10: 00000000bb1414ac R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000402ab0 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: CR2: ffff887f927affff ---[ end trace 6270fb21d77867fc ]--- RIP: 0010:is_multicast_ether_addr_64bits include/linux/etherdevice.h:135 [inline] RIP: 0010:netif_receive_generic_xdp net/core/dev.c:4565 [inline] RIP: 0010:do_xdp_generic.part.0+0x479/0x17a0 net/core/dev.c:4663 Code: 03 48 89 85 f0 fe ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 a5 78 ff ff ff 80 3c 02 00 48 89 8d c8 fe ff ff 0f 85 ac 10 00 00 <49> 8b 04 24 49 8d 7c 24 0c 48 ba 00 00 00 00 00 fc ff df 48 89 85 RSP: 0018:ffffc90008217770 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff8880927a0000 RCX: ffffffff0000feff RDX: 1ffff10ff24f5fff RSI: ffff8880927f0230 RDI: 0000000000000005 RBP: ffffc900082178b0 R08: ffff888093316200 R09: ffffed10124f405d R10: ffffed10124f405c R11: ffff8880927a02e3 R12: ffff887f927affff R13: 0000000000000100 R14: ffff8880927affff R15: ffff8880927f01c0 FS: 00000000022a9880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff887f927affff CR3: 0000000096671000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400