BUG: unable to handle page fault for address: ffff887f82cdefff #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: 10980 Comm: syz-executor642 Not tainted 5.5.0-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:ffffc900020f7770 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff888082ccf000 RCX: ffffffff0000feff RDX: 1ffff10ff059bdff RSI: ffff8880930582f0 RDI: 0000000000000005 RBP: ffffc900020f78b0 R08: ffff8880a9316180 R09: ffffed1010599e5d R10: ffffed1010599e5c R11: ffff888082ccf2e3 R12: ffff887f82cdefff R13: 0000000000000100 R14: ffff888082cdefff R15: ffff888093058280 FS: 00000000018e5880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff887f82cdefff CR3: 0000000096c30000 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:1902 [inline] do_iter_readv_writev+0x5f8/0x8f0 fs/read_write.c:693 do_iter_write fs/read_write.c:970 [inline] do_iter_write+0x184/0x610 fs/read_write.c:951 vfs_writev+0x1b3/0x2f0 fs/read_write.c:1015 do_writev+0x15b/0x330 fs/read_write.c:1058 __do_sys_writev fs/read_write.c:1131 [inline] __se_sys_writev fs/read_write.c:1128 [inline] __x64_sys_writev+0x75/0xb0 fs/read_write.c:1128 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4421c0 Code: 05 48 3d 01 f0 ff ff 0f 83 5d 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 83 3d 51 8e 29 00 00 75 14 b8 14 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 34 09 fc ff c3 48 83 ec 08 e8 ba 2b 00 00 RSP: 002b:00007fffd2745f58 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 00007fffd2745f70 RCX: 00000000004421c0 RDX: 0000000000000001 RSI: 00007fffd2745fa0 RDI: 00000000000000f0 RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000bb1414ac R10: 00000000bb1414ac R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000403010 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: CR2: ffff887f82cdefff ---[ end trace e27dc6998a477a6c ]--- 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:ffffc900020f7770 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff888082ccf000 RCX: ffffffff0000feff RDX: 1ffff10ff059bdff RSI: ffff8880930582f0 RDI: 0000000000000005 RBP: ffffc900020f78b0 R08: ffff8880a9316180 R09: ffffed1010599e5d R10: ffffed1010599e5c R11: ffff888082ccf2e3 R12: ffff887f82cdefff R13: 0000000000000100 R14: ffff888082cdefff R15: ffff888093058280 FS: 00000000018e5880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff887f82cdefff CR3: 0000000096c30000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400