IPVS: ftp: loaded support on port[0] = 21 netlink: 28 bytes leftover after parsing attributes in process `syz-executor254'. BUG: unable to handle kernel paging request at ffffffff81980ead PGD 9e6e067 P4D 9e6e067 PUD 9e6f063 PMD 18001e1 Oops: 0003 [#1] PREEMPT SMP KASAN CPU: 1 PID: 8097 Comm: syz-executor254 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:arch_atomic_inc arch/x86/include/asm/atomic.h:97 [inline] RIP: 0010:atomic_inc include/asm-generic/atomic-instrumented.h:110 [inline] RIP: 0010:__lock_acquire+0x256/0x3ff0 kernel/locking/lockdep.c:3308 Code: 00 49 8b 44 c6 08 48 85 c0 0f 84 38 ff ff ff 48 8d b8 38 01 00 00 be 04 00 00 00 48 89 44 24 10 e8 bf 54 4d 00 48 8b 44 24 10 ff 80 38 01 00 00 49 8d b5 80 08 00 00 48 ba 00 00 00 00 00 fc RSP: 0018:ffff888097fa6cb0 EFLAGS: 00010046 RAX: ffffffff81980d75 RBX: 0000000000000000 RCX: ffffffff814afa31 RDX: fffffbfff03301d7 RSI: 0000000000000004 RDI: ffffffff81980ead RBP: 0000000000000000 R08: 0000000000000001 R09: fffffbfff03301d6 R10: ffffffff81980eb0 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8880abd54180 R14: ffff8882359a5ba0 R15: 0000000000000001 FS: 0000555556af0300(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff81980ead CR3: 00000000aa85e000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908 __mutex_lock_common kernel/locking/mutex.c:937 [inline] __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078 xt_find_match net/netfilter/x_tables.c:189 [inline] xt_find_match+0xa3/0x280 net/netfilter/x_tables.c:181 xt_request_find_match net/netfilter/x_tables.c:219 [inline] xt_request_find_match+0x88/0x110 net/netfilter/x_tables.c:212 get_xt_match net/sched/em_ipt.c:112 [inline] em_ipt_change+0x1c7/0x470 net/sched/em_ipt.c:132 tcf_em_validate net/sched/ematch.c:248 [inline] tcf_em_tree_validate net/sched/ematch.c:365 [inline] tcf_em_tree_validate+0x8fa/0xea0 net/sched/ematch.c:307 flow_change+0x2a4/0x1ca0 net/sched/cls_flow.c:439 tc_new_tfilter+0xb52/0x16c0 net/sched/cls_api.c:1320 rtnetlink_rcv_msg+0x453/0xb80 net/core/rtnetlink.c:4782 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2463 netlink_unicast_kernel net/netlink/af_netlink.c:1325 [inline] netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1351 netlink_sendmsg+0x6c3/0xc50 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:651 [inline] sock_sendmsg+0xc3/0x120 net/socket.c:661 ___sys_sendmsg+0x3b3/0x8e0 net/socket.c:2227 __sys_sendmmsg+0x195/0x470 net/socket.c:2322 __do_sys_sendmmsg net/socket.c:2351 [inline] __se_sys_sendmmsg net/socket.c:2348 [inline] __x64_sys_sendmmsg+0x99/0x100 net/socket.c:2348 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f1348a69d49 Code: 28 c3 e8 1a 15 00 00 66 2e 0f 1f 84 00 00 00 00 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffdace28048 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f1348ad7ed0 RCX: 00007f1348a69d49 RDX: 040000000000009f RSI: 00000000200002c0 RDI: 0000000000000004 RBP: 00007ffdace28058 R08: 00007f1348ad7e40 R09: 00007f1348ad7e40 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdace28060 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: CR2: ffffffff81980ead ---[ end trace e08482747d60391e ]--- RIP: 0010:arch_atomic_inc arch/x86/include/asm/atomic.h:97 [inline] RIP: 0010:atomic_inc include/asm-generic/atomic-instrumented.h:110 [inline] RIP: 0010:__lock_acquire+0x256/0x3ff0 kernel/locking/lockdep.c:3308 Code: 00 49 8b 44 c6 08 48 85 c0 0f 84 38 ff ff ff 48 8d b8 38 01 00 00 be 04 00 00 00 48 89 44 24 10 e8 bf 54 4d 00 48 8b 44 24 10 ff 80 38 01 00 00 49 8d b5 80 08 00 00 48 ba 00 00 00 00 00 fc RSP: 0018:ffff888097fa6cb0 EFLAGS: 00010046 RAX: ffffffff81980d75 RBX: 0000000000000000 RCX: ffffffff814afa31 RDX: fffffbfff03301d7 RSI: 0000000000000004 RDI: ffffffff81980ead RBP: 0000000000000000 R08: 0000000000000001 R09: fffffbfff03301d6 R10: ffffffff81980eb0 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8880abd54180 R14: ffff8882359a5ba0 R15: 0000000000000001 FS: 0000555556af0300(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffff81980ead CR3: 00000000aa85e000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 49 8b 44 c6 08 mov 0x8(%r14,%rax,8),%rax 5: 48 85 c0 test %rax,%rax 8: 0f 84 38 ff ff ff je 0xffffff46 e: 48 8d b8 38 01 00 00 lea 0x138(%rax),%rdi 15: be 04 00 00 00 mov $0x4,%esi 1a: 48 89 44 24 10 mov %rax,0x10(%rsp) 1f: e8 bf 54 4d 00 callq 0x4d54e3 24: 48 8b 44 24 10 mov 0x10(%rsp),%rax * 29: f0 ff 80 38 01 00 00 lock incl 0x138(%rax) <-- trapping instruction 30: 49 8d b5 80 08 00 00 lea 0x880(%r13),%rsi 37: 48 rex.W 38: ba 00 00 00 00 mov $0x0,%edx 3d: 00 fc add %bh,%ah