kernel tried to execute NX-protected page - exploit attempt? (uid: 0) BUG: unable to handle page fault for address: ffff88808d82ca50 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0011) - permissions violation PGD b001067 P4D b001067 PUD 21ffff067 PMD 800000008d8001e3 Oops: 0011 [#1] PREEMPT SMP KASAN CPU: 1 PID: 19614 Comm: syz-executor.2 Not tainted 5.5.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:0xffff88808d82ca50 Code: 00 00 00 00 00 00 00 00 00 00 86 7a 03 89 ff ff ff ff 00 60 43 aa 80 88 ff ff 40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <50> 78 c9 01 00 c9 ff ff 70 55 a7 86 ff ff ff ff c0 60 35 9f 80 88 RSP: 0018:ffffc90001c97860 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffffff869eea30 RCX: dffffc0000000000 RDX: ffffc9000f4dc000 RSI: 000000000000c034 RDI: 000000000000c035 RBP: ffffc90001c97b20 R08: dffffc0000000000 R09: ffffed10149c92b9 R10: ffffed10149c92b9 R11: 0000000000000000 R12: 1ffff110150eff07 R13: ffff8880a877f83a R14: 000000000000006e R15: dffffc0000000000 FS: 00007fbc30e60700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff88808d82ca50 CR3: 000000008b1d7000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline] netlink_unicast+0x766/0x920 net/netlink/af_netlink.c:1328 netlink_sendmsg+0xa2b/0xd40 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x4f7/0x7f0 net/socket.c:2343 ___sys_sendmsg net/socket.c:2397 [inline] __sys_sendmsg+0x1ed/0x290 net/socket.c:2430 __do_sys_sendmsg net/socket.c:2439 [inline] __se_sys_sendmsg net/socket.c:2437 [inline] __x64_sys_sendmsg+0x7f/0x90 net/socket.c:2437 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45b349 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fbc30e5fc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fbc30e606d4 RCX: 000000000045b349 RDX: 0000000000000000 RSI: 0000000020003e00 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000940 R14: 00000000004ca9e5 R15: 000000000075bf2c Modules linked in: CR2: ffff88808d82ca50 ---[ end trace b07a2013d57622df ]--- RIP: 0010:0xffff88808d82ca50 Code: 00 00 00 00 00 00 00 00 00 00 86 7a 03 89 ff ff ff ff 00 60 43 aa 80 88 ff ff 40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <50> 78 c9 01 00 c9 ff ff 70 55 a7 86 ff ff ff ff c0 60 35 9f 80 88 RSP: 0018:ffffc90001c97860 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffffffff869eea30 RCX: dffffc0000000000 RDX: ffffc9000f4dc000 RSI: 000000000000c034 RDI: 000000000000c035 RBP: ffffc90001c97b20 R08: dffffc0000000000 R09: ffffed10149c92b9 R10: ffffed10149c92b9 R11: 0000000000000000 R12: 1ffff110150eff07 R13: ffff8880a877f83a R14: 000000000000006e R15: dffffc0000000000 FS: 00007fbc30e60700(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff88808d82ca50 CR3: 000000008b1d7000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400