=====================================================
BUG: KMSAN: uninit-value in __skb_dst_copy include/net/dst.h:279 [inline]
BUG: KMSAN: uninit-value in skb_dst_copy include/net/dst.h:285 [inline]
BUG: KMSAN: uninit-value in __copy_skb_header+0x2bf/0x720 net/core/skbuff.c:935
CPU: 0 PID: 11432 Comm: syz-executor.0 Not tainted 5.4.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c9/0x220 lib/dump_stack.c:118
 kmsan_report+0x128/0x220 mm/kmsan/kmsan_report.c:108
 __msan_warning+0x64/0xc0 mm/kmsan/kmsan_instr.c:245
 __skb_dst_copy include/net/dst.h:279 [inline]
 skb_dst_copy include/net/dst.h:285 [inline]
 __copy_skb_header+0x2bf/0x720 net/core/skbuff.c:935
 __skb_clone+0xa2/0x970 net/core/skbuff.c:987
 skb_clone+0x402/0x5d0 net/core/skbuff.c:1455
 frame_get_tagged_skb net/hsr/hsr_forward.c:187 [inline]
 hsr_forward_do net/hsr/hsr_forward.c:273 [inline]
 hsr_forward_skb+0x1752/0x3070 net/hsr/hsr_forward.c:361
 send_hsr_supervision_frame+0x10a6/0x14f0 net/hsr/hsr_device.c:306
 hsr_announce+0x1eb/0x370 net/hsr/hsr_device.c:334
 call_timer_fn+0x232/0x530 kernel/time/timer.c:1404
 expire_timers kernel/time/timer.c:1449 [inline]
 __run_timers+0xd60/0x1270 kernel/time/timer.c:1773
 run_timer_softirq+0x2d/0x50 kernel/time/timer.c:1786
 __do_softirq+0x4a1/0x83a kernel/softirq.c:293
 invoke_softirq kernel/softirq.c:375 [inline]
 irq_exit+0x230/0x280 kernel/softirq.c:416
 exiting_irq+0xe/0x10 arch/x86/include/asm/apic.h:536
 smp_apic_timer_interrupt+0x48/0x70 arch/x86/kernel/apic/apic.c:1138
 apic_timer_interrupt+0x2e/0x40 arch/x86/entry/entry_64.S:835
 </IRQ>
RIP: 0010:kmsan_slab_free+0x99/0xe0 mm/kmsan/kmsan_hooks.c:111
Code: 00 b9 03 00 00 00 e8 d6 e5 ff ff 65 ff 0d 13 ff 9b 79 65 8b 05 0c ff 9b 79 85 c0 75 2e e8 0f c7 36 ff 4c 89 7d d0 ff 75 d0 9d <65> 48 8b 04 25 28 00 00 00 48 3b 45 e0 75 0b 48 83 c4 18 5b 41 5e
RSP: 0018:ffffa868434ff770 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000000 RBX: ffff8d60ef8076c0 RCX: 0000000000000011
RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffff8d60c727cc40
RBP: ffffa868434ff7a0 R08: 0000000000000003 R09: ffffa868434ff58c
R10: 000000000000000f R11: ffffffff85e4d9b0 R12: 0000000000000000
R13: ffff8d60c727cc40 R14: ffff8d60c727cc40 R15: 0000000000000246
 slab_free_freelist_hook mm/slub.c:1457 [inline]
 slab_free mm/slub.c:3020 [inline]
 kfree+0x7d0/0x2f10 mm/slub.c:3973
 __vunmap+0xedb/0xf20 mm/vmalloc.c:2283
 __vfree mm/vmalloc.c:2324 [inline]
 vfree+0x7c/0x170 mm/vmalloc.c:2354
 copy_entries_to_user net/ipv4/netfilter/ip_tables.c:867 [inline]
 get_entries net/ipv4/netfilter/ip_tables.c:1024 [inline]
 do_ipt_get_ctl+0xf7e/0x1010 net/ipv4/netfilter/ip_tables.c:1700
 nf_sockopt net/netfilter/nf_sockopt.c:104 [inline]
 nf_getsockopt+0x481/0x4e0 net/netfilter/nf_sockopt.c:122
 ip_getsockopt+0x29a/0x460 net/ipv4/ip_sockglue.c:1576
 tcp_getsockopt+0x1c6/0x1f0 net/ipv4/tcp.c:3688
 sock_common_getsockopt+0x13f/0x180 net/core/sock.c:3110
 __sys_getsockopt+0x533/0x7b0 net/socket.c:2129
 __do_sys_getsockopt net/socket.c:2144 [inline]
 __se_sys_getsockopt+0xe1/0x100 net/socket.c:2141
 __x64_sys_getsockopt+0x62/0x80 net/socket.c:2141
 do_syscall_64+0xb6/0x160 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d14a
Code: b8 34 01 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 8d 8b 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 6a 8b fb ff c3 66 0f 1f 84 00 00 00 00 00
RSP: 002b:0000000000a6f618 EFLAGS: 00000216 ORIG_RAX: 0000000000000037
RAX: ffffffffffffffda RBX: 0000000000a6f640 RCX: 000000000045d14a
RDX: 0000000000000041 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000717e80 R08: 0000000000a6f63c R09: 0000000000004000
R10: 0000000000a6f740 R11: 0000000000000216 R12: 0000000000000003
R13: 0000000000000000 R14: 0000000000000000 R15: 00000000007177c0

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:149 [inline]
 kmsan_internal_poison_shadow+0x60/0x120 mm/kmsan/kmsan.c:132
 kmsan_slab_alloc+0x97/0x100 mm/kmsan/kmsan_hooks.c:86
 slab_alloc_node mm/slub.c:2773 [inline]
 slab_alloc mm/slub.c:2782 [inline]
 kmem_cache_alloc+0x8d9/0xd20 mm/slub.c:2787
 skb_clone+0x326/0x5d0 net/core/skbuff.c:1448
 frame_get_tagged_skb net/hsr/hsr_forward.c:187 [inline]
 hsr_forward_do net/hsr/hsr_forward.c:273 [inline]
 hsr_forward_skb+0x1752/0x3070 net/hsr/hsr_forward.c:361
 send_hsr_supervision_frame+0x10a6/0x14f0 net/hsr/hsr_device.c:306
 hsr_announce+0x1eb/0x370 net/hsr/hsr_device.c:334
 call_timer_fn+0x232/0x530 kernel/time/timer.c:1404
 expire_timers kernel/time/timer.c:1449 [inline]
 __run_timers+0xd60/0x1270 kernel/time/timer.c:1773
 run_timer_softirq+0x2d/0x50 kernel/time/timer.c:1786
 __do_softirq+0x4a1/0x83a kernel/softirq.c:293
 invoke_softirq kernel/softirq.c:375 [inline]
 irq_exit+0x230/0x280 kernel/softirq.c:416
 exiting_irq+0xe/0x10 arch/x86/include/asm/apic.h:536
 smp_apic_timer_interrupt+0x48/0x70 arch/x86/kernel/apic/apic.c:1138
 apic_timer_interrupt+0x2e/0x40 arch/x86/entry/entry_64.S:835
 native_restore_fl arch/x86/include/asm/irqflags.h:41 [inline]
 arch_local_irq_restore arch/x86/include/asm/irqflags.h:84 [inline]
 kmsan_slab_free+0x99/0xe0 mm/kmsan/kmsan_hooks.c:111
 slab_free_freelist_hook mm/slub.c:1457 [inline]
 slab_free mm/slub.c:3020 [inline]
 kfree+0x7d0/0x2f10 mm/slub.c:3973
 __vunmap+0xedb/0xf20 mm/vmalloc.c:2283
 __vfree mm/vmalloc.c:2324 [inline]
 vfree+0x7c/0x170 mm/vmalloc.c:2354
 copy_entries_to_user net/ipv4/netfilter/ip_tables.c:867 [inline]
 get_entries net/ipv4/netfilter/ip_tables.c:1024 [inline]
 do_ipt_get_ctl+0xf7e/0x1010 net/ipv4/netfilter/ip_tables.c:1700
 nf_sockopt net/netfilter/nf_sockopt.c:104 [inline]
 nf_getsockopt+0x481/0x4e0 net/netfilter/nf_sockopt.c:122
 ip_getsockopt+0x29a/0x460 net/ipv4/ip_sockglue.c:1576
 tcp_getsockopt+0x1c6/0x1f0 net/ipv4/tcp.c:3688
 sock_common_getsockopt+0x13f/0x180 net/core/sock.c:3110
 __sys_getsockopt+0x533/0x7b0 net/socket.c:2129
 __do_sys_getsockopt net/socket.c:2144 [inline]
 __se_sys_getsockopt+0xe1/0x100 net/socket.c:2141
 __x64_sys_getsockopt+0x62/0x80 net/socket.c:2141
 do_syscall_64+0xb6/0x160 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
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