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BUG: KMSAN: use-after-free in slab_alloc_node mm/slub.c:2751 [inline]
BUG: KMSAN: use-after-free in kmem_cache_alloc_node+0x5d0/0xe70 mm/slub.c:2830
CPU: 0 PID: 18005 Comm: syz-executor.3 Not tainted 5.4.0-rc3+ #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+0x14a/0x2f0 mm/kmsan/kmsan_report.c:109
 __msan_warning+0x73/0xf0 mm/kmsan/kmsan_instr.c:245
 slab_alloc_node mm/slub.c:2751 [inline]
 kmem_cache_alloc_node+0x5d0/0xe70 mm/slub.c:2830
 __alloc_skb+0x215/0xa10 net/core/skbuff.c:197
 alloc_skb include/linux/skbuff.h:1050 [inline]
 __tcp_send_ack+0xfb/0x840 net/ipv4/tcp_output.c:3675
 tcp_send_ack+0x68/0x90 net/ipv4/tcp_output.c:3702
 __tcp_ack_snd_check+0x643/0xb40 net/ipv4/tcp_input.c:5241
 tcp_rcv_established+0x2d7b/0x31f0 net/ipv4/tcp_input.c:5672
 tcp_v4_do_rcv+0x684/0xd70 net/ipv4/tcp_ipv4.c:1561
 sk_backlog_rcv include/net/sock.h:945 [inline]
 __release_sock+0x448/0x640 net/core/sock.c:2435
 release_sock+0x99/0x2a0 net/core/sock.c:2951
 tcp_recvmsg+0x335f/0x4ff0 net/ipv4/tcp.c:2182
 inet_recvmsg+0x237/0x7d0 net/ipv4/af_inet.c:838
 sock_recvmsg_nosec net/socket.c:871 [inline]
 sock_recvmsg+0x323/0x3c0 net/socket.c:889
 ___sys_recvmsg+0x461/0x11e0 net/socket.c:2480
 __sys_recvmsg net/socket.c:2537 [inline]
 __do_sys_recvmsg net/socket.c:2547 [inline]
 __se_sys_recvmsg+0x2fa/0x450 net/socket.c:2544
 __x64_sys_recvmsg+0x4a/0x70 net/socket.c:2544
 do_syscall_64+0xb6/0x160 arch/x86/entry/common.c:291
 entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x459a59
Code: fd b7 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 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f3d171adc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002f
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459a59
RDX: 0000000000000000 RSI: 00000000200003c0 RDI: 0000000000000003
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3d171ae6d4
R13: 00000000004c7204 R14: 00000000004dcba0 R15: 00000000ffffffff

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:150 [inline]
 kmsan_internal_chain_origin+0xbd/0x170 mm/kmsan/kmsan.c:317
 __msan_chain_origin+0x6b/0xe0 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:2752 [inline]
 kmem_cache_alloc_node+0x769/0xe70 mm/slub.c:2830
 __alloc_skb+0x215/0xa10 net/core/skbuff.c:197
 alloc_skb include/linux/skbuff.h:1050 [inline]
 __tcp_send_ack+0xfb/0x840 net/ipv4/tcp_output.c:3675
 tcp_send_ack+0x68/0x90 net/ipv4/tcp_output.c:3702
 __tcp_ack_snd_check+0x643/0xb40 net/ipv4/tcp_input.c:5241
 tcp_rcv_established+0x2d7b/0x31f0 net/ipv4/tcp_input.c:5672
 tcp_v4_do_rcv+0x684/0xd70 net/ipv4/tcp_ipv4.c:1561
 sk_backlog_rcv include/net/sock.h:945 [inline]
 __release_sock+0x448/0x640 net/core/sock.c:2435
 release_sock+0x99/0x2a0 net/core/sock.c:2951
 tcp_recvmsg+0x335f/0x4ff0 net/ipv4/tcp.c:2182
 inet_recvmsg+0x237/0x7d0 net/ipv4/af_inet.c:838
 sock_recvmsg_nosec net/socket.c:871 [inline]
 sock_recvmsg+0x323/0x3c0 net/socket.c:889
 ___sys_recvmsg+0x461/0x11e0 net/socket.c:2480
 __sys_recvmsg net/socket.c:2537 [inline]
 __do_sys_recvmsg net/socket.c:2547 [inline]
 __se_sys_recvmsg+0x2fa/0x450 net/socket.c:2544
 __x64_sys_recvmsg+0x4a/0x70 net/socket.c:2544
 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:150 [inline]
 kmsan_internal_poison_shadow+0x60/0x110 mm/kmsan/kmsan.c:133
 kmsan_slab_free+0x8d/0x100 mm/kmsan/kmsan_hooks.c:121
 slab_free_freelist_hook mm/slub.c:1473 [inline]
 slab_free mm/slub.c:3040 [inline]
 kmem_cache_free_bulk+0x3ad9/0x3f10 mm/slub.c:3165
 __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
 run_ksoftirqd+0x25/0x40 kernel/softirq.c:607
 smpboot_thread_fn+0x4a3/0x990 kernel/smpboot.c:165
 kthread+0x4b5/0x4f0 kernel/kthread.c:256
 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355
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