================================================================== BUG: KMSAN: uninit-value in _decode_session6+0x635/0x1630 net/ipv6/xfrm6_policy.c:149 CPU: 0 PID: 17765 Comm: blkid 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:should_fail+0x18c/0x1350 lib/fault-inject.c:122 Code: e8 99 ab e0 fc 65 8b 04 25 14 fd 02 00 a9 00 01 1f 00 0f 84 8a 00 00 00 e8 81 ab e0 fc 4d 85 e4 0f 85 2c 05 00 00 49 8b 5d 00 <4c> 89 ef e8 7c 0a 43 fd 48 8b 00 48 85 c0 74 0c 48 f7 d0 48 21 d8 RSP: 0000:ffff8801046af988 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffffffff84c3e85f RBX: 0000000000000000 RCX: ffff8801cfedda00 RDX: 0000000000000000 RSI: aaaaaaaaaaaab000 RDI: ffffea000adf9340 RBP: ffff8801046afa40 R08: 0000000000480020 R09: 0000000000000002 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffffffff8b91f780 R14: 0000000000000040 R15: ffff8801cfede388 __should_failslab+0x278/0x2a0 mm/failslab.c:32 should_failslab+0x29/0x70 mm/slab_common.c:1557 slab_pre_alloc_hook mm/slab.h:423 [inline] slab_alloc_node mm/slub.c:2653 [inline] slab_alloc mm/slub.c:2735 [inline] kmem_cache_alloc+0x146/0xd50 mm/slub.c:2740 anon_vma_chain_alloc mm/rmap.c:129 [inline] __anon_vma_prepare+0x10b/0xd90 mm/rmap.c:183 anon_vma_prepare include/linux/rmap.h:153 [inline] do_anonymous_page mm/memory.c:3172 [inline] handle_pte_fault mm/memory.c:3983 [inline] __handle_mm_fault mm/memory.c:4109 [inline] handle_mm_fault+0x72e6/0xa3b0 mm/memory.c:4146 __do_page_fault+0xec9/0x1b50 arch/x86/mm/fault.c:1396 do_page_fault+0x98/0xd0 arch/x86/mm/fault.c:1473 page_fault+0x1e/0x30 arch/x86/entry/entry_64.S:1170 RIP: 0033:0x7f6120979c57 Code: 48 83 ec 18 48 8b 07 48 89 3d dd b1 20 00 48 83 c7 08 48 89 3d 82 af 20 00 89 05 5c b1 20 00 48 98 48 8d 54 c7 08 48 83 3a 00 <48> 89 15 d2 c4 20 00 74 0a 48 83 c2 08 48 83 3a 00 75 f6 48 8d 35 RSP: 002b:00007fff453a6c20 EFLAGS: 00010206 RAX: 0000000000000005 RBX: 00007fff453a6cd0 RCX: 00007f612097dc53 RDX: 00007fff453a6d08 RSI: 00007f61209674b0 RDI: 00007fff453a6cd8 RBP: 00007f61209674b0 R08: 0000000000000002 R09: 00000162cb5ced55 R10: 000000006fffff6e R11: 000000006ffffeff R12: 00007f6120965a78 R13: 00007f6120965000 R14: 00007f6120965a78 R15: 00007f6120965380 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 ==================================================================