BUG: unable to handle page fault for address: ffff887fa3f607ff #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: 1 PID: 9882 Comm: syz-executor615 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:ffffc90000e77770 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff8880a3f50800 RCX: ffffffff0000feff RDX: 1ffff10ff47ec0ff RSI: ffff888097ea78b0 RDI: 0000000000000005 RBP: ffffc90000e778b0 R08: ffff8880a6d6e080 R09: ffffed10147ea15d R10: ffffed10147ea15c R11: ffff8880a3f50ae3 R12: ffff887fa3f607ff R13: 0000000000000100 R14: ffff8880a3f607ff R15: ffff888097ea7840 FS: 0000000000df6880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff887fa3f607ff CR3: 00000000a240b000 CR4: 00000000001406e0 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: 0033:0x4420c0 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 8f 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:00007ffdbefc3c98 EFLAGS: 00000246 ORIG_RAX: 0000000000000014 RAX: ffffffffffffffda RBX: 00007ffdbefc3cb0 RCX: 00000000004420c0 RDX: 0000000000000001 RSI: 00007ffdbefc3ce0 RDI: 00000000000000f0 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000004 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000148be R13: 0000000000402f10 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: CR2: ffff887fa3f607ff ---[ end trace 8ad236f0c21dd59f ]--- 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:ffffc90000e77770 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffff8880a3f50800 RCX: ffffffff0000feff RDX: 1ffff10ff47ec0ff RSI: ffff888097ea78b0 RDI: 0000000000000005 RBP: ffffc90000e778b0 R08: ffff8880a6d6e080 R09: ffffed10147ea15d R10: ffffed10147ea15c R11: ffff8880a3f50ae3 R12: ffff887fa3f607ff R13: 0000000000000100 R14: ffff8880a3f607ff R15: ffff888097ea7840 FS: 0000000000df6880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff887fa3f607ff CR3: 00000000a240b000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400