Re: KMSAN: uninit-value in _decode_session6
syzbot has found a reproducer for the following crash on: HEAD commit:d2d741e5d189 kmsan: add initialization for shmem pages git tree: https://github.com/google/kmsan.git/master console output: https://syzkaller.appspot.com/x/log.txt?id=6550343064223744 kernel config: https://syzkaller.appspot.com/x/.config?id=328654897048964367 dashboard link: https://syzkaller.appspot.com/bug?extid=2974b85346f85b586f4d compiler: clang version 7.0.0 (trunk 329391) syzkaller repro:https://syzkaller.appspot.com/x/repro.syz?id=5023772637659136 C reproducer: https://syzkaller.appspot.com/x/repro.c?id=5102535626981376 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+2974b85346f85b586...@syzkaller.appspotmail.com IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready 8021q: adding VLAN 0 to HW filter on device team0 == BUG: KMSAN: uninit-value in _decode_session6+0x6d2/0x16e0 net/ipv6/xfrm6_policy.c:151 CPU: 0 PID: 4529 Comm: syz-executor165 Not tainted 4.16.0+ #87 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x185/0x1d0 lib/dump_stack.c:53 kmsan_report+0x142/0x240 mm/kmsan/kmsan.c:1067 __msan_warning_32+0x6c/0xb0 mm/kmsan/kmsan_instr.c:683 _decode_session6+0x6d2/0x16e0 net/ipv6/xfrm6_policy.c:151 __xfrm_decode_session+0x151/0x200 net/xfrm/xfrm_policy.c:2368 xfrm_decode_session_reverse include/net/xfrm.h:1213 [inline] icmpv6_route_lookup net/ipv6/icmp.c:372 [inline] icmp6_send+0x2bf7/0x3730 net/ipv6/icmp.c:551 icmpv6_send+0xe0/0x110 net/ipv6/ip6_icmp.c:43 ip6_link_failure+0x8f/0x580 net/ipv6/route.c:2034 dst_link_failure include/net/dst.h:426 [inline] ip6_tnl_xmit+0x1423/0x3af0 net/ipv6/ip6_tunnel.c:1215 ip6ip6_tnl_xmit net/ipv6/ip6_tunnel.c:1367 [inline] ip6_tnl_start_xmit+0x1cc0/0x1ef0 net/ipv6/ip6_tunnel.c:1390 __netdev_start_xmit include/linux/netdevice.h:4066 [inline] netdev_start_xmit include/linux/netdevice.h:4075 [inline] xmit_one net/core/dev.c:3026 [inline] dev_hard_start_xmit+0x5f1/0xc70 net/core/dev.c:3042 __dev_queue_xmit+0x27ee/0x3520 net/core/dev.c:3557 dev_queue_xmit+0x4b/0x60 net/core/dev.c:3590 neigh_direct_output+0x42/0x50 net/core/neighbour.c:1390 neigh_output include/net/neighbour.h:482 [inline] ip6_finish_output2+0x1d01/0x2130 net/ipv6/ip6_output.c:120 ip6_finish_output+0xae9/0xba0 net/ipv6/ip6_output.c:154 NF_HOOK_COND include/linux/netfilter.h:277 [inline] ip6_output+0x597/0x6c0 net/ipv6/ip6_output.c:171 dst_output include/net/dst.h:443 [inline] ip6_local_out+0x15e/0x1d0 net/ipv6/output_core.c:176 ip6_send_skb net/ipv6/ip6_output.c:1682 [inline] ip6_push_pending_frames+0x218/0x4d0 net/ipv6/ip6_output.c:1702 rawv6_push_pending_frames net/ipv6/raw.c:616 [inline] rawv6_sendmsg+0x4235/0x4fb0 net/ipv6/raw.c:935 inet_sendmsg+0x48d/0x740 net/ipv4/af_inet.c:764 sock_sendmsg_nosec net/socket.c:630 [inline] sock_sendmsg net/socket.c:640 [inline] sock_write_iter+0x3b9/0x470 net/socket.c:909 call_write_iter include/linux/fs.h:1782 [inline] new_sync_write fs/read_write.c:469 [inline] __vfs_write+0x7fb/0x9f0 fs/read_write.c:482 vfs_write+0x463/0x8d0 fs/read_write.c:544 SYSC_write+0x172/0x360 fs/read_write.c:589 SyS_write+0x55/0x80 fs/read_write.c:581 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x3d/0xa2 RIP: 0033:0x4418b9 RSP: 002b:7ffece331e68 EFLAGS: 0217 ORIG_RAX: 0001 RAX: ffda RBX: 0003 RCX: 004418b9 RDX: 036b RSI: 2240 RDI: 0004 RBP: 006cd018 R08: R09: R10: R11: 0217 R12: 004025b0 R13: 00402640 R14: R15: Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:278 [inline] kmsan_internal_poison_shadow+0xb8/0x1b0 mm/kmsan/kmsan.c:188 kmsan_kmalloc+0x94/0x100 mm/kmsan/kmsan.c:314 kmsan_slab_alloc+0x11/0x20 mm/kmsan/kmsan.c:321 slab_post_alloc_hook mm/slab.h:445 [inline] slab_alloc_node mm/slub.c:2737 [inline] __kmalloc_node_track_caller+0xaed/0x11c0 mm/slub.c:4369 __kmalloc_reserve net/core/skbuff.c:138 [inline] pskb_expand_head+0x21d/0x1a70 net/core/skbuff.c:1458 __pskb_pull_tail+0x1d7/0x2300 net/core/skbuff.c:1878 pskb_may_pull include/linux/skbuff.h:2112 [inline] ip6_tnl_parse_tlv_enc_lim+0x7f5/0xa90 net/ipv6/ip6_tunnel.c:411 ip6ip6_tnl_xmit net/ipv6/ip6_tunnel.c:1326 [inline] ip6_tnl_start_xmit+0x911/0x1ef0 net/ipv6/ip6_tunnel.c:1390 __netdev_start_xmit include/linux/netdevice.h:4066 [inline] netdev_start_xmit include/linux/netdevice.h:4075 [inline] xmit_one net/core/dev.c:3026 [inline] dev_hard_start_xmit+0x5f1/0xc70 net/core
Re: KMSAN: uninit-value in _decode_session6
syzbot has found a reproducer for the following crash on: HEAD commit:d2d741e5d189 kmsan: add initialization for shmem pages git tree: https://github.com/google/kmsan.git/master console output: https://syzkaller.appspot.com/x/log.txt?id=6550343064223744 kernel config: https://syzkaller.appspot.com/x/.config?id=328654897048964367 dashboard link: https://syzkaller.appspot.com/bug?extid=2974b85346f85b586f4d compiler: clang version 7.0.0 (trunk 329391) syzkaller repro:https://syzkaller.appspot.com/x/repro.syz?id=5023772637659136 C reproducer: https://syzkaller.appspot.com/x/repro.c?id=5102535626981376 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+2974b85346f85b586...@syzkaller.appspotmail.com IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready 8021q: adding VLAN 0 to HW filter on device team0 == BUG: KMSAN: uninit-value in _decode_session6+0x6d2/0x16e0 net/ipv6/xfrm6_policy.c:151 CPU: 0 PID: 4529 Comm: syz-executor165 Not tainted 4.16.0+ #87 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x185/0x1d0 lib/dump_stack.c:53 kmsan_report+0x142/0x240 mm/kmsan/kmsan.c:1067 __msan_warning_32+0x6c/0xb0 mm/kmsan/kmsan_instr.c:683 _decode_session6+0x6d2/0x16e0 net/ipv6/xfrm6_policy.c:151 __xfrm_decode_session+0x151/0x200 net/xfrm/xfrm_policy.c:2368 xfrm_decode_session_reverse include/net/xfrm.h:1213 [inline] icmpv6_route_lookup net/ipv6/icmp.c:372 [inline] icmp6_send+0x2bf7/0x3730 net/ipv6/icmp.c:551 icmpv6_send+0xe0/0x110 net/ipv6/ip6_icmp.c:43 ip6_link_failure+0x8f/0x580 net/ipv6/route.c:2034 dst_link_failure include/net/dst.h:426 [inline] ip6_tnl_xmit+0x1423/0x3af0 net/ipv6/ip6_tunnel.c:1215 ip6ip6_tnl_xmit net/ipv6/ip6_tunnel.c:1367 [inline] ip6_tnl_start_xmit+0x1cc0/0x1ef0 net/ipv6/ip6_tunnel.c:1390 __netdev_start_xmit include/linux/netdevice.h:4066 [inline] netdev_start_xmit include/linux/netdevice.h:4075 [inline] xmit_one net/core/dev.c:3026 [inline] dev_hard_start_xmit+0x5f1/0xc70 net/core/dev.c:3042 __dev_queue_xmit+0x27ee/0x3520 net/core/dev.c:3557 dev_queue_xmit+0x4b/0x60 net/core/dev.c:3590 neigh_direct_output+0x42/0x50 net/core/neighbour.c:1390 neigh_output include/net/neighbour.h:482 [inline] ip6_finish_output2+0x1d01/0x2130 net/ipv6/ip6_output.c:120 ip6_finish_output+0xae9/0xba0 net/ipv6/ip6_output.c:154 NF_HOOK_COND include/linux/netfilter.h:277 [inline] ip6_output+0x597/0x6c0 net/ipv6/ip6_output.c:171 dst_output include/net/dst.h:443 [inline] ip6_local_out+0x15e/0x1d0 net/ipv6/output_core.c:176 ip6_send_skb net/ipv6/ip6_output.c:1682 [inline] ip6_push_pending_frames+0x218/0x4d0 net/ipv6/ip6_output.c:1702 rawv6_push_pending_frames net/ipv6/raw.c:616 [inline] rawv6_sendmsg+0x4235/0x4fb0 net/ipv6/raw.c:935 inet_sendmsg+0x48d/0x740 net/ipv4/af_inet.c:764 sock_sendmsg_nosec net/socket.c:630 [inline] sock_sendmsg net/socket.c:640 [inline] sock_write_iter+0x3b9/0x470 net/socket.c:909 call_write_iter include/linux/fs.h:1782 [inline] new_sync_write fs/read_write.c:469 [inline] __vfs_write+0x7fb/0x9f0 fs/read_write.c:482 vfs_write+0x463/0x8d0 fs/read_write.c:544 SYSC_write+0x172/0x360 fs/read_write.c:589 SyS_write+0x55/0x80 fs/read_write.c:581 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x3d/0xa2 RIP: 0033:0x4418b9 RSP: 002b:7ffece331e68 EFLAGS: 0217 ORIG_RAX: 0001 RAX: ffda RBX: 0003 RCX: 004418b9 RDX: 036b RSI: 2240 RDI: 0004 RBP: 006cd018 R08: R09: R10: R11: 0217 R12: 004025b0 R13: 00402640 R14: R15: Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:278 [inline] kmsan_internal_poison_shadow+0xb8/0x1b0 mm/kmsan/kmsan.c:188 kmsan_kmalloc+0x94/0x100 mm/kmsan/kmsan.c:314 kmsan_slab_alloc+0x11/0x20 mm/kmsan/kmsan.c:321 slab_post_alloc_hook mm/slab.h:445 [inline] slab_alloc_node mm/slub.c:2737 [inline] __kmalloc_node_track_caller+0xaed/0x11c0 mm/slub.c:4369 __kmalloc_reserve net/core/skbuff.c:138 [inline] pskb_expand_head+0x21d/0x1a70 net/core/skbuff.c:1458 __pskb_pull_tail+0x1d7/0x2300 net/core/skbuff.c:1878 pskb_may_pull include/linux/skbuff.h:2112 [inline] ip6_tnl_parse_tlv_enc_lim+0x7f5/0xa90 net/ipv6/ip6_tunnel.c:411 ip6ip6_tnl_xmit net/ipv6/ip6_tunnel.c:1326 [inline] ip6_tnl_start_xmit+0x911/0x1ef0 net/ipv6/ip6_tunnel.c:1390 __netdev_start_xmit include/linux/netdevice.h:4066 [inline] netdev_start_xmit include/linux/netdevice.h:4075 [inline] xmit_one net/core/dev.c:3026 [inline] dev_hard_start_xmit+0x5f1/0xc70 net/core
KMSAN: uninit-value in _decode_session6
Hello, syzbot hit the following crash on https://github.com/google/kmsan.git/master commit e2ab7e8abba47a2f2698216258e5d8727ae58717 (Fri Apr 6 16:24:31 2018 +) kmsan: temporarily disable visitAsmInstruction() to help syzbot syzbot dashboard link: https://syzkaller.appspot.com/bug?extid=2974b85346f85b586f4d Unfortunately, I don't have any reproducer for this crash yet. Raw console output: https://syzkaller.appspot.com/x/log.txt?id=4871594698604544 Kernel config: https://syzkaller.appspot.com/x/.config?id=6627248707860932248 compiler: clang version 7.0.0 (trunk 329060) (llvm/trunk 329054) IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+2974b85346f85b586...@syzkaller.appspotmail.com It will help syzbot understand when the bug is fixed. See footer for details. If you forward the report, please keep this part and the footer. == BUG: KMSAN: uninit-value in _decode_session6+0x6d1/0x1290 net/ipv6/xfrm6_policy.c:151 CPU: 1 PID: 5714 Comm: blkid Not tainted 4.16.0+ #81 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x185/0x1d0 lib/dump_stack.c:53 kmsan_report+0x142/0x240 mm/kmsan/kmsan.c:1067 __msan_warning_32+0x6c/0xb0 mm/kmsan/kmsan_instr.c:676 _decode_session6+0x6d1/0x1290 net/ipv6/xfrm6_policy.c:151 __xfrm_decode_session+0x140/0x1c0 net/xfrm/xfrm_policy.c:2368 xfrm_decode_session_reverse include/net/xfrm.h:1213 [inline] icmpv6_route_lookup net/ipv6/icmp.c:372 [inline] icmp6_send+0x305f/0x3460 net/ipv6/icmp.c:551 icmpv6_send+0xe0/0x110 net/ipv6/ip6_icmp.c:43 ip6_link_failure+0x8f/0x580 net/ipv6/route.c:2034 dst_link_failure include/net/dst.h:426 [inline] ndisc_error_report+0x101/0x1a0 net/ipv6/ndisc.c:695 neigh_invalidate+0x385/0x930 net/core/neighbour.c:883 neigh_timer_handler+0xd85/0x12d0 net/core/neighbour.c:969 call_timer_fn+0x26a/0x5a0 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0xda7/0x11c0 kernel/time/timer.c:1666 run_timer_softirq+0x43/0x70 kernel/time/timer.c:1692 __do_softirq+0x56d/0x93d kernel/softirq.c:285 invoke_softirq kernel/softirq.c:365 [inline] irq_exit+0x202/0x240 kernel/softirq.c:405 exiting_irq+0xe/0x10 arch/x86/include/asm/apic.h:541 smp_apic_timer_interrupt+0x64/0x90 arch/x86/kernel/apic/apic.c:1055 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:857 RIP: 0010:kmsan_get_origin_address_noruntime+0x8f/0x260 include/linux/mmzone.h:1206 RSP: :880165b0fb40 EFLAGS: 0202 ORIG_RAX: ff12 RAX: 8801e5b0fcc8 RBX: RCX: 88021fff1580 RDX: 0580 RSI: RDI: 880165b0fcc8 RBP: 880165b0fb78 R08: 01080020 R09: 0002 R10: R11: R12: 0068 R13: d3a0004b R14: 880165b0fcc8 R15: kmsan_set_origin_inline+0x6b/0x120 mm/kmsan/kmsan_instr.c:585 __msan_poison_alloca+0x15c/0x1d0 mm/kmsan/kmsan_instr.c:647 handle_mm_fault+0x1c8/0x7ba0 mm/memory.c:4114 __do_page_fault+0xec4/0x1a10 arch/x86/mm/fault.c:1423 do_page_fault+0xd3/0x260 arch/x86/mm/fault.c:1500 page_fault+0x45/0x50 arch/x86/entry/entry_64.S:1151 RIP: 0033:0x7f93ad8e4789 RSP: 002b:7ffd11b3cf20 EFLAGS: 00010216 RAX: 7f93ad4742a0 RBX: 7f93adaf79a8 RCX: 04a8 RDX: 7f93ad6a9028 RSI: aaab RDI: RBP: 7ffd11b3d000 R08: 0001 R09: 0010 R10: 7f93ad343a30 R11: 0206 R12: 7f93ad325000 R13: 7f93ad343220 R14: 7f93ad33d748 R15: 7f93adaef740 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:278 [inline] kmsan_save_stack mm/kmsan/kmsan.c:293 [inline] kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:684 kmsan_memcpy_origins+0x11d/0x170 mm/kmsan/kmsan.c:526 __msan_memcpy+0x19f/0x1f0 mm/kmsan/kmsan_instr.c:470 skb_copy_bits+0x63a/0xdb0 net/core/skbuff.c:2046 __pskb_pull_tail+0x483/0x22e0 net/core/skbuff.c:1883 pskb_may_pull include/linux/skbuff.h:2112 [inline] _decode_session6+0x79f/0x1290 net/ipv6/xfrm6_policy.c:152 __xfrm_decode_session+0x140/0x1c0 net/xfrm/xfrm_policy.c:2368 xfrm_decode_session_reverse include/net/xfrm.h:1213 [inline] icmpv6_route_lookup net/ipv6/icmp.c:372 [inline] icmp6_send+0x305f/0x3460 net/ipv6/icmp.c:551 icmpv6_send+0xe0/0x110 net/ipv6/ip6_icmp.c:43 ip6_link_failure+0x8f/0x580 net/ipv6/route.c:2034 dst_link_failure include/net/dst.h:426 [inline] ndisc_error_report+0x101/0x1a0 net/ipv6/ndisc.c:695 neigh_invalidate+0x385/0x930 net/core/neighbour.c:883 neigh_timer_handler+0xd85/0x12d0 net/core/neighbour.c:969 call_timer_fn+0x26a/0x5a0 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0xda7/0x11c0 kernel/time/timer.c:1666 run_timer_softirq+0x43/0x70 kernel
KMSAN: uninit-value in _decode_session6
Hello, syzbot hit the following crash on https://github.com/google/kmsan.git/master commit e2ab7e8abba47a2f2698216258e5d8727ae58717 (Fri Apr 6 16:24:31 2018 +) kmsan: temporarily disable visitAsmInstruction() to help syzbot syzbot dashboard link: https://syzkaller.appspot.com/bug?extid=2974b85346f85b586f4d Unfortunately, I don't have any reproducer for this crash yet. Raw console output: https://syzkaller.appspot.com/x/log.txt?id=4871594698604544 Kernel config: https://syzkaller.appspot.com/x/.config?id=6627248707860932248 compiler: clang version 7.0.0 (trunk 329060) (llvm/trunk 329054) IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+2974b85346f85b586...@syzkaller.appspotmail.com It will help syzbot understand when the bug is fixed. See footer for details. If you forward the report, please keep this part and the footer. == BUG: KMSAN: uninit-value in _decode_session6+0x6d1/0x1290 net/ipv6/xfrm6_policy.c:151 CPU: 1 PID: 5714 Comm: blkid Not tainted 4.16.0+ #81 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x185/0x1d0 lib/dump_stack.c:53 kmsan_report+0x142/0x240 mm/kmsan/kmsan.c:1067 __msan_warning_32+0x6c/0xb0 mm/kmsan/kmsan_instr.c:676 _decode_session6+0x6d1/0x1290 net/ipv6/xfrm6_policy.c:151 __xfrm_decode_session+0x140/0x1c0 net/xfrm/xfrm_policy.c:2368 xfrm_decode_session_reverse include/net/xfrm.h:1213 [inline] icmpv6_route_lookup net/ipv6/icmp.c:372 [inline] icmp6_send+0x305f/0x3460 net/ipv6/icmp.c:551 icmpv6_send+0xe0/0x110 net/ipv6/ip6_icmp.c:43 ip6_link_failure+0x8f/0x580 net/ipv6/route.c:2034 dst_link_failure include/net/dst.h:426 [inline] ndisc_error_report+0x101/0x1a0 net/ipv6/ndisc.c:695 neigh_invalidate+0x385/0x930 net/core/neighbour.c:883 neigh_timer_handler+0xd85/0x12d0 net/core/neighbour.c:969 call_timer_fn+0x26a/0x5a0 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0xda7/0x11c0 kernel/time/timer.c:1666 run_timer_softirq+0x43/0x70 kernel/time/timer.c:1692 __do_softirq+0x56d/0x93d kernel/softirq.c:285 invoke_softirq kernel/softirq.c:365 [inline] irq_exit+0x202/0x240 kernel/softirq.c:405 exiting_irq+0xe/0x10 arch/x86/include/asm/apic.h:541 smp_apic_timer_interrupt+0x64/0x90 arch/x86/kernel/apic/apic.c:1055 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:857 RIP: 0010:kmsan_get_origin_address_noruntime+0x8f/0x260 include/linux/mmzone.h:1206 RSP: :880165b0fb40 EFLAGS: 0202 ORIG_RAX: ff12 RAX: 8801e5b0fcc8 RBX: RCX: 88021fff1580 RDX: 0580 RSI: RDI: 880165b0fcc8 RBP: 880165b0fb78 R08: 01080020 R09: 0002 R10: R11: R12: 0068 R13: d3a0004b R14: 880165b0fcc8 R15: kmsan_set_origin_inline+0x6b/0x120 mm/kmsan/kmsan_instr.c:585 __msan_poison_alloca+0x15c/0x1d0 mm/kmsan/kmsan_instr.c:647 handle_mm_fault+0x1c8/0x7ba0 mm/memory.c:4114 __do_page_fault+0xec4/0x1a10 arch/x86/mm/fault.c:1423 do_page_fault+0xd3/0x260 arch/x86/mm/fault.c:1500 page_fault+0x45/0x50 arch/x86/entry/entry_64.S:1151 RIP: 0033:0x7f93ad8e4789 RSP: 002b:7ffd11b3cf20 EFLAGS: 00010216 RAX: 7f93ad4742a0 RBX: 7f93adaf79a8 RCX: 04a8 RDX: 7f93ad6a9028 RSI: aaab RDI: RBP: 7ffd11b3d000 R08: 0001 R09: 0010 R10: 7f93ad343a30 R11: 0206 R12: 7f93ad325000 R13: 7f93ad343220 R14: 7f93ad33d748 R15: 7f93adaef740 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:278 [inline] kmsan_save_stack mm/kmsan/kmsan.c:293 [inline] kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:684 kmsan_memcpy_origins+0x11d/0x170 mm/kmsan/kmsan.c:526 __msan_memcpy+0x19f/0x1f0 mm/kmsan/kmsan_instr.c:470 skb_copy_bits+0x63a/0xdb0 net/core/skbuff.c:2046 __pskb_pull_tail+0x483/0x22e0 net/core/skbuff.c:1883 pskb_may_pull include/linux/skbuff.h:2112 [inline] _decode_session6+0x79f/0x1290 net/ipv6/xfrm6_policy.c:152 __xfrm_decode_session+0x140/0x1c0 net/xfrm/xfrm_policy.c:2368 xfrm_decode_session_reverse include/net/xfrm.h:1213 [inline] icmpv6_route_lookup net/ipv6/icmp.c:372 [inline] icmp6_send+0x305f/0x3460 net/ipv6/icmp.c:551 icmpv6_send+0xe0/0x110 net/ipv6/ip6_icmp.c:43 ip6_link_failure+0x8f/0x580 net/ipv6/route.c:2034 dst_link_failure include/net/dst.h:426 [inline] ndisc_error_report+0x101/0x1a0 net/ipv6/ndisc.c:695 neigh_invalidate+0x385/0x930 net/core/neighbour.c:883 neigh_timer_handler+0xd85/0x12d0 net/core/neighbour.c:969 call_timer_fn+0x26a/0x5a0 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0xda7/0x11c0 kernel/time/timer.c:1666 run_timer_softirq+0x43/0x70 kernel
