================================================================== BUG: KMSAN: uninit-value in _decode_session6+0x635/0x1630 net/ipv6/xfrm6_policy.c:149 CPU: 1 PID: 6359 Comm: syz-executor1 Not tainted 4.19.0-rc7+ #69 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+0x306/0x460 lib/dump_stack.c:113 kmsan_report+0x1a2/0x2e0 mm/kmsan/kmsan.c:917 __msan_warning+0x7c/0xe0 mm/kmsan/kmsan_instr.c:500 _decode_session6+0x635/0x1630 net/ipv6/xfrm6_policy.c:149 __xfrm_decode_session+0x156/0x200 net/xfrm/xfrm_policy.c:2299 xfrm_decode_session_reverse include/net/xfrm.h:1239 [inline] icmpv6_route_lookup net/ipv6/icmp.c:372 [inline] icmp6_send+0x3037/0x3c50 net/ipv6/icmp.c:551 icmpv6_send+0xe5/0x110 net/ipv6/ip6_icmp.c:43 ip6_link_failure+0x5c/0x310 net/ipv6/route.c:2260 dst_link_failure include/net/dst.h:427 [inline] ndisc_error_report+0x106/0x1a0 net/ipv6/ndisc.c:695 neigh_invalidate+0x35a/0x900 net/core/neighbour.c:894 neigh_timer_handler+0xca1/0x12a0 net/core/neighbour.c:980 call_timer_fn+0x326/0x700 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0xe75/0x12e0 kernel/time/timer.c:1682 run_timer_softirq+0x2e/0x50 kernel/time/timer.c:1695 __do_softirq+0x601/0xa6d kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x247/0x280 kernel/softirq.c:414 exiting_irq+0xe/0x10 arch/x86/include/asm/apic.h:536 smp_apic_timer_interrupt+0x64/0x90 arch/x86/kernel/apic/apic.c:1059 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:869 RIP: 0010:native_restore_fl arch/x86/include/asm/irqflags.h:40 [inline] RIP: 0010:arch_local_irq_restore arch/x86/include/asm/irqflags.h:81 [inline] RIP: 0010:kmsan_kmalloc+0xd4/0x120 mm/kmsan/kmsan_hooks.c:107 Code: 00 74 16 eb 53 48 89 df 4c 89 f6 e8 16 ba ff ff 41 ff 8d 7c 09 00 00 75 3f e8 d8 b1 36 ff 48 8b 45 c0 48 89 45 b8 ff 75 b8 9d <65> 48 8b 04 25 28 00 00 00 48 3b 45 d0 75 2f 48 83 c4 20 5b 41 5c RSP: 0018:ffff88015bb0f370 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000246 RBX: ffff8801295ba3c0 RCX: 0000000000000019 RDX: 0000000000000018 RSI: ffff88021fff2000 RDI: ffffffff7fffffff RBP: ffff88015bb0f3b8 R08: 00000000004000c0 R09: 0000000000000003 R10: ffffc900333fffff R11: 0000000000000000 R12: ffff88021f805680 R13: ffff8801bb030000 R14: 0000000000000060 R15: 00000000006000c0 kmsan_slab_alloc+0x10/0x20 mm/kmsan/kmsan_hooks.c:113 slab_post_alloc_hook mm/slab.h:446 [inline] slab_alloc_node mm/slub.c:2727 [inline] __kmalloc_node+0xf2c/0x1430 mm/slub.c:3830 kmalloc_node include/linux/slab.h:555 [inline] alloc_vmap_area+0x1e1/0x1640 mm/vmalloc.c:420 __get_vm_area_node+0x3ab/0x800 mm/vmalloc.c:1397 get_vm_area+0xbf/0xd0 mm/vmalloc.c:1435 kmsan_vmalloc_area_node+0x72/0x1b0 mm/kmsan/kmsan_hooks.c:176 __vmalloc_area_node mm/vmalloc.c:1705 [inline] __vmalloc_node_range+0xc0c/0x1280 mm/vmalloc.c:1752 __vmalloc_node mm/vmalloc.c:1797 [inline] __vmalloc_node_flags mm/vmalloc.c:1811 [inline] vzalloc+0xd8/0xf0 mm/vmalloc.c:1850 alloc_counters+0x99/0x8d0 net/ipv6/netfilter/ip6_tables.c:819 copy_entries_to_user net/ipv6/netfilter/ip6_tables.c:841 [inline] get_entries net/ipv6/netfilter/ip6_tables.c:1044 [inline] do_ip6t_get_ctl+0x854/0x1140 net/ipv6/netfilter/ip6_tables.c:1712 nf_sockopt net/netfilter/nf_sockopt.c:104 [inline] nf_getsockopt+0x481/0x4e0 net/netfilter/nf_sockopt.c:122 ipv6_getsockopt+0x279/0x510 net/ipv6/ipv6_sockglue.c:1381 tcp_getsockopt+0x1c6/0x1f0 net/ipv4/tcp.c:3583 sock_common_getsockopt+0x13f/0x180 net/core/sock.c:2997 __sys_getsockopt+0x48c/0x550 net/socket.c:1939 __do_sys_getsockopt net/socket.c:1950 [inline] __se_sys_getsockopt+0xe1/0x100 net/socket.c:1947 __x64_sys_getsockopt+0x62/0x80 net/socket.c:1947 do_syscall_64+0xbe/0x100 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x45a09a Code: b8 34 01 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 bd 88 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 37 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 9a 88 fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:0000000000a3f608 EFLAGS: 00000216 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 0000000000a3f630 RCX: 000000000045a09a RDX: 0000000000000041 RSI: 0000000000000029 RDI: 0000000000000003 RBP: 0000000000709cc0 R08: 0000000000a3f62c R09: 0000000000004000 R10: 0000000000a3f730 R11: 0000000000000216 R12: 0000000000000003 R13: 0000000000000000 R14: 0000000000000029 R15: 00000000007081c0 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:255 [inline] kmsan_internal_poison_shadow+0xc8/0x1d0 mm/kmsan/kmsan.c:180 kmsan_kmalloc+0xa4/0x120 mm/kmsan/kmsan_hooks.c:104 kmsan_slab_alloc+0x10/0x20 mm/kmsan/kmsan_hooks.c:113 slab_post_alloc_hook mm/slab.h:446 [inline] slab_alloc_node mm/slub.c:2727 [inline] __kmalloc_node_track_caller+0xb43/0x1400 mm/slub.c:4360 __kmalloc_reserve net/core/skbuff.c:138 [inline] __alloc_skb+0x422/0xe90 net/core/skbuff.c:206 alloc_skb include/linux/skbuff.h:996 [inline] __ip6_append_data+0x3bf8/0x5170 net/ipv6/ip6_output.c:1425 ip6_append_data+0x3d8/0x670 net/ipv6/ip6_output.c:1587 rawv6_sendmsg+0x26c2/0x54d0 net/ipv6/raw.c:937 inet_sendmsg+0x4d8/0x7f0 net/ipv4/af_inet.c:798 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg net/socket.c:631 [inline] ___sys_sendmsg+0xe47/0x1200 net/socket.c:2116 __sys_sendmsg net/socket.c:2154 [inline] __do_sys_sendmsg net/socket.c:2163 [inline] __se_sys_sendmsg+0x307/0x460 net/socket.c:2161 __x64_sys_sendmsg+0x4a/0x70 net/socket.c:2161 do_syscall_64+0xbe/0x100 arch/x86/entry/common.c:291 entry_SYSCALL_64_after_hwframe+0x63/0xe7 ==================================================================