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BUG: KMSAN: use-after-free in slab_alloc_node mm/slub.c:2762 [inline]
BUG: KMSAN: use-after-free in kmem_cache_alloc_node+0x5a9/0xe60 mm/slub.c:2836
CPU: 1 PID: 11709 Comm: syz-executor.1 Not tainted 5.4.0-rc5+ #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+0x191/0x1f0 lib/dump_stack.c:113
 kmsan_report+0x128/0x220 mm/kmsan/kmsan_report.c:108
 __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:245
 slab_alloc_node mm/slub.c:2762 [inline]
 kmem_cache_alloc_node+0x5a9/0xe60 mm/slub.c:2836
 __alloc_skb+0x215/0xa10 net/core/skbuff.c:197
 alloc_skb include/linux/skbuff.h:1050 [inline]
 __ip6_append_data+0x469e/0x6020 net/ipv6/ip6_output.c:1518
 ip6_append_data+0x3c2/0x650 net/ipv6/ip6_output.c:1687
 rawv6_sendmsg+0x3145/0x5a20 net/ipv6/raw.c:949
 inet_sendmsg+0x2d8/0x2e0 net/ipv4/af_inet.c:807
 sock_sendmsg_nosec net/socket.c:637 [inline]
 sock_sendmsg net/socket.c:657 [inline]
 ___sys_sendmsg+0x12c4/0x1590 net/socket.c:2311
 __sys_sendmmsg+0x53a/0xae0 net/socket.c:2413
 __do_sys_sendmmsg net/socket.c:2442 [inline]
 __se_sys_sendmmsg+0xbd/0xe0 net/socket.c:2439
 __x64_sys_sendmmsg+0x56/0x70 net/socket.c:2439
 do_syscall_64+0xb6/0x160 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x45a639
Code: ad b6 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f43aa3eec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000000045a639
RDX: 0400000000000107 RSI: 0000000020008440 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f43aa3ef6d4
R13: 00000000004c83c8 R14: 00000000004de808 R15: 00000000ffffffff

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:151 [inline]
 kmsan_internal_chain_origin+0xbd/0x180 mm/kmsan/kmsan.c:319
 __msan_chain_origin+0x6b/0xd0 mm/kmsan/kmsan_instr.c:179
 ___slab_alloc+0x1dbc/0x1fb0 mm/slub.c:2636
 __slab_alloc mm/slub.c:2689 [inline]
 slab_alloc_node mm/slub.c:2763 [inline]
 slab_alloc mm/slub.c:2808 [inline]
 kmem_cache_alloc+0xadf/0xd20 mm/slub.c:2813
 skb_clone+0x326/0x5d0 net/core/skbuff.c:1448
 ipv6_raw_deliver net/ipv6/raw.c:214 [inline]
 raw6_local_deliver+0xaf2/0x1040 net/ipv6/raw.c:235
 ip6_protocol_deliver_rcu+0x607/0x22a0 net/ipv6/ip6_input.c:359
 ip6_input_finish net/ipv6/ip6_input.c:450 [inline]
 NF_HOOK include/linux/netfilter.h:305 [inline]
 ip6_input+0x2af/0x340 net/ipv6/ip6_input.c:459
 dst_input include/net/dst.h:442 [inline]
 ip6_rcv_finish net/ipv6/ip6_input.c:76 [inline]
 NF_HOOK include/linux/netfilter.h:305 [inline]
 ipv6_rcv+0x683/0x710 net/ipv6/ip6_input.c:284
 __netif_receive_skb_one_core net/core/dev.c:5010 [inline]
 __netif_receive_skb net/core/dev.c:5124 [inline]
 process_backlog+0x721/0x1410 net/core/dev.c:5955
 napi_poll net/core/dev.c:6392 [inline]
 net_rx_action+0x7a6/0x1aa0 net/core/dev.c:6460
 __do_softirq+0x4a1/0x83a kernel/softirq.c:293
 do_softirq_own_stack+0x49/0x80 arch/x86/entry/entry_64.S:1093
 do_softirq kernel/softirq.c:338 [inline]
 __local_bh_enable_ip+0x184/0x1d0 kernel/softirq.c:190
 local_bh_enable+0x36/0x40 include/linux/bottom_half.h:32
 rcu_read_unlock_bh include/linux/rcupdate.h:688 [inline]
 ip6_finish_output2+0x213f/0x2670 net/ipv6/ip6_output.c:117
 __ip6_finish_output+0x83d/0x8f0 net/ipv6/ip6_output.c:142
 ip6_finish_output+0x2db/0x420 net/ipv6/ip6_output.c:152
 NF_HOOK_COND include/linux/netfilter.h:294 [inline]
 ip6_output+0x5d3/0x720 net/ipv6/ip6_output.c:175
 dst_output include/net/dst.h:436 [inline]
 ip6_local_out+0x164/0x1d0 net/ipv6/output_core.c:179
 ip6_send_skb net/ipv6/ip6_output.c:1795 [inline]
 ip6_push_pending_frames+0x215/0x4f0 net/ipv6/ip6_output.c:1815
 rawv6_push_pending_frames net/ipv6/raw.c:613 [inline]
 rawv6_sendmsg+0x4125/0x5a20 net/ipv6/raw.c:956
 inet_sendmsg+0x2d8/0x2e0 net/ipv4/af_inet.c:807
 sock_sendmsg_nosec net/socket.c:637 [inline]
 sock_sendmsg net/socket.c:657 [inline]
 ___sys_sendmsg+0x12c4/0x1590 net/socket.c:2311
 __sys_sendmmsg+0x53a/0xae0 net/socket.c:2413
 __do_sys_sendmmsg net/socket.c:2442 [inline]
 __se_sys_sendmmsg+0xbd/0xe0 net/socket.c:2439
 __x64_sys_sendmmsg+0x56/0x70 net/socket.c:2439
 do_syscall_64+0xb6/0x160 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7

Uninit was created at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:151 [inline]
 kmsan_internal_poison_shadow+0x60/0x120 mm/kmsan/kmsan.c:134
 kmsan_slab_free+0x8d/0xf0 mm/kmsan/kmsan_hooks.c:108
 slab_free_freelist_hook mm/slub.c:1473 [inline]
 slab_free mm/slub.c:3046 [inline]
 kmem_cache_free_bulk+0x3ad9/0x3f10 mm/slub.c:3171
 __kfree_skb_flush+0xb0/0x100 net/core/skbuff.c:862
 net_rx_action+0x1a5e/0x1aa0 net/core/dev.c:6483
 __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 arch/x86/include/asm/apic.h:536 [inline]
 do_IRQ+0x123/0x360 arch/x86/kernel/irq.c:263
 ret_from_intr+0x0/0x33
 skb_end_pointer include/linux/skbuff.h:1383 [inline]
 skb_cloned include/linux/skbuff.h:1588 [inline]
 skb_try_coalesce+0x150/0x1c30 net/core/skbuff.c:5034
 tcp_try_coalesce+0x1f1/0x9c0 net/ipv4/tcp_input.c:4428
 tcp_queue_rcv net/ipv4/tcp_input.c:4682 [inline]
 tcp_rcv_established+0x2665/0x31f0 net/ipv4/tcp_input.c:5662
 tcp_v4_do_rcv+0x684/0xd70 net/ipv4/tcp_ipv4.c:1564
 sk_backlog_rcv include/net/sock.h:950 [inline]
 __release_sock+0x448/0x640 net/core/sock.c:2439
 release_sock+0x99/0x2a0 net/core/sock.c:2955
 tcp_recvmsg+0x335f/0x4ff0 net/ipv4/tcp.c:2184
 inet_recvmsg+0x237/0x7d0 net/ipv4/af_inet.c:838
 sock_recvmsg_nosec net/socket.c:871 [inline]
 sock_recvmsg net/socket.c:889 [inline]
 sock_read_iter+0x5be/0x660 net/socket.c:967
 call_read_iter include/linux/fs.h:1889 [inline]
 new_sync_read fs/read_write.c:414 [inline]
 __vfs_read+0xa67/0xc90 fs/read_write.c:427
 vfs_read+0x359/0x6f0 fs/read_write.c:461
 ksys_read+0x265/0x430 fs/read_write.c:587
 __do_sys_read fs/read_write.c:597 [inline]
 __se_sys_read+0x92/0xb0 fs/read_write.c:595
 __x64_sys_read+0x4a/0x70 fs/read_write.c:595
 do_syscall_64+0xb6/0x160 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
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