================================================================================ UBSAN: Undefined behaviour in net/netfilter/nf_nat_core.c:67:9 index 24 is out of range for type 'nf_nat_l3proto *[13]' CPU: 1 PID: 23961 Comm: syz-executor.2 Not tainted 4.19.147-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x22c/0x33e lib/dump_stack.c:118 ubsan_epilogue+0xe/0x3a lib/ubsan.c:161 __ubsan_handle_out_of_bounds.cold+0x63/0x6f lib/ubsan.c:383 __nf_nat_l3proto_find net/netfilter/nf_nat_core.c:67 [inline] nfnetlink_parse_nat_setup+0x68c/0x750 net/netfilter/nf_nat_core.c:876 ctnetlink_parse_nat_setup+0xd6/0x760 net/netfilter/nf_conntrack_netlink.c:1521 ctnetlink_setup_nat net/netfilter/nf_conntrack_netlink.c:1591 [inline] ctnetlink_create_conntrack+0x48f/0x1350 net/netfilter/nf_conntrack_netlink.c:1984 ctnetlink_new_conntrack+0x4f3/0xdb0 net/netfilter/nf_conntrack_netlink.c:2114 nfnetlink_rcv_msg+0xeff/0x1210 net/netfilter/nfnetlink.c:233 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2455 nfnetlink_rcv+0x1b2/0x41b net/netfilter/nfnetlink.c:565 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x717/0xcc0 net/netlink/af_netlink.c:1909 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xc7/0x130 net/socket.c:632 ___sys_sendmsg+0x7bb/0x8f0 net/socket.c:2115 __sys_sendmsg net/socket.c:2153 [inline] __do_sys_sendmsg net/socket.c:2162 [inline] __se_sys_sendmsg net/socket.c:2160 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2160 do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45e179 Code: 3d b2 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 0b b2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff00f26dc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000029400 RCX: 000000000045e179 RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000005 RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c R13: 00007ffdcdc4433f R14: 00007ff00f26e9c0 R15: 000000000118cf4c ================================================================================ BUG: sleeping function called from invalid context at arch/x86/mm/fault.c:1355 in_atomic(): 0, irqs_disabled(): 0, pid: 23961, name: syz-executor.2 3 locks held by syz-executor.2/23961: #0: 000000007fd8caf6 (&table[i].mutex){+.+.}, at: nfnl_lock net/netfilter/nfnetlink.c:62 [inline] #0: 000000007fd8caf6 (&table[i].mutex){+.+.}, at: nfnetlink_rcv_msg+0xa8f/0x1210 net/netfilter/nfnetlink.c:228 #1: 0000000057c96868 (rcu_read_lock){....}, at: ctnetlink_create_conntrack+0x199/0x1350 net/netfilter/nf_conntrack_netlink.c:1929 #2: 000000007a647d0f (&mm->mmap_sem){++++}, at: __do_page_fault+0x3e2/0xe00 arch/x86/mm/fault.c:1341 Preemption disabled at: [] rcu_lockdep_current_cpu_online kernel/rcu/tree.c:1076 [inline] [] rcu_lockdep_current_cpu_online+0x30/0x220 kernel/rcu/tree.c:1068 CPU: 0 PID: 23961 Comm: syz-executor.2 Not tainted 4.19.147-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x22c/0x33e lib/dump_stack.c:118 ___might_sleep.cold+0x6a/0x7e kernel/sched/core.c:6196 __do_page_fault+0x40d/0xe00 arch/x86/mm/fault.c:1355 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1205 RIP: 0010: (null) Code: Bad RIP value. RSP: 0018:ffff888047d4f198 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000aa79000 RDX: 1ffffffff167633e RSI: ffff888047d4f218 RDI: ffff888047d4f268 RBP: ffff8880a933e180 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000001 R14: ffffffff8b3b19b8 R15: ffff888047d4f218 BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 PGD 9a91e067 P4D 9a91e067 PUD 56725067 PMD 0 Oops: 0010 [#1] PREEMPT SMP KASAN CPU: 1 PID: 23961 Comm: syz-executor.2 Tainted: G W 4.19.147-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010: (null) Code: Bad RIP value. RSP: 0018:ffff888047d4f198 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000aa79000 RDX: 1ffffffff167633e RSI: ffff888047d4f218 RDI: ffff888047d4f268 RBP: ffff8880a933e180 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000001 R14: ffffffff8b3b19b8 R15: ffff888047d4f218 FS: 00007ff00f26e700(0000) GS:ffff8880ae300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 000000008feea000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: nfnetlink_parse_nat net/netfilter/nf_nat_core.c:847 [inline] nfnetlink_parse_nat_setup+0x255/0x750 net/netfilter/nf_nat_core.c:884 ctnetlink_parse_nat_setup+0xd6/0x760 net/netfilter/nf_conntrack_netlink.c:1521 ctnetlink_setup_nat net/netfilter/nf_conntrack_netlink.c:1591 [inline] ctnetlink_create_conntrack+0x48f/0x1350 net/netfilter/nf_conntrack_netlink.c:1984 ctnetlink_new_conntrack+0x4f3/0xdb0 net/netfilter/nf_conntrack_netlink.c:2114 nfnetlink_rcv_msg+0xeff/0x1210 net/netfilter/nfnetlink.c:233 netlink_rcv_skb+0x160/0x440 net/netlink/af_netlink.c:2455 nfnetlink_rcv+0x1b2/0x41b net/netfilter/nfnetlink.c:565 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x4d5/0x690 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x717/0xcc0 net/netlink/af_netlink.c:1909 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xc7/0x130 net/socket.c:632 ___sys_sendmsg+0x7bb/0x8f0 net/socket.c:2115 __sys_sendmsg net/socket.c:2153 [inline] __do_sys_sendmsg net/socket.c:2162 [inline] __se_sys_sendmsg net/socket.c:2160 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2160 do_syscall_64+0xf9/0x670 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45e179 Code: 3d b2 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 0b b2 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff00f26dc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000029400 RCX: 000000000045e179 RDX: 0000000000000000 RSI: 0000000020000300 RDI: 0000000000000005 RBP: 000000000118cf80 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c R13: 00007ffdcdc4433f R14: 00007ff00f26e9c0 R15: 000000000118cf4c Modules linked in: CR2: 0000000000000000 ---[ end trace 01e3b5658bd6e5df ]--- RIP: 0010: (null) Code: Bad RIP value. RSP: 0018:ffff888047d4f198 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000aa79000 RDX: 1ffffffff167633e RSI: ffff888047d4f218 RDI: ffff888047d4f268 RBP: ffff8880a933e180 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000001 R14: ffffffff8b3b19b8 R15: ffff888047d4f218 FS: 00007ff00f26e700(0000) GS:ffff8880ae200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c0297f7091 CR3: 000000008feea000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400