=====================================================
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: 0 PID: 11930 Comm: syz-fuzzer Not tainted 5.4.0-rc5+ #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+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]
 new_skb drivers/block/aoe/aoecmd.c:67 [inline]
 aoecmd_cfg_pkts drivers/block/aoe/aoecmd.c:426 [inline]
 aoecmd_cfg+0x205/0xa80 drivers/block/aoe/aoecmd.c:1372
 discover_timer+0x86/0xa0 drivers/block/aoe/aoemain.c:24
 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:1139
 apic_timer_interrupt+0x2e/0x40 arch/x86/entry/entry_64.S:837
 </IRQ>
RIP: 0010:metadata_is_contiguous+0x262/0x270 mm/kmsan/kmsan.c:532
Code: 08 73 ff 48 c7 c7 94 05 2a 90 4c 89 f6 e8 76 8d 4d 0c 8b 3b e8 5f 27 00 00 44 89 e0 48 83 c4 28 5b 41 5c 41 5d 41 5e 41 5f 5d <c3> 0f 1f 00 66 2e 0f 1f 84 00 00 00 00 00 55 48 89 e5 41 57 41 56
RSP: 0018:ffff8880b7f9f288 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13
RAX: 00000000058a5e01 RBX: ffffffff902a2000 RCX: ccccccccccccd000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff8881058a5e40
RBP: ffff8880b7f9f2c0 R08: ffff888113f8f0f0 R09: ffff88810a916128
R10: 0000000000000000 R11: ffffffff8c63ab20 R12: ffff8881058a5e40
R13: ffff88811f07f4e8 R14: ffff8881058a5e40 R15: 0000000000000008
 __msan_metadata_ptr_for_load_8+0x10/0x20 mm/kmsan/kmsan_instr.c:55
 dev_net include/net/net_namespace.h:320 [inline]
 rt_is_expired net/ipv4/route.c:422 [inline]
 ipv4_dst_check+0xdd/0x1b0 net/ipv4/route.c:1190
 __sk_dst_check+0x13b/0x2d0 net/core/sock.c:546
 __ip_queue_xmit+0x1a7/0x21f0 net/ipv4/ip_output.c:475
 ip_queue_xmit+0xcc/0xf0 include/net/ip.h:237
 __tcp_transmit_skb+0x40e3/0x5d90 net/ipv4/tcp_output.c:1169
 __tcp_send_ack+0x701/0x840 net/ipv4/tcp_output.c:3696
 tcp_send_ack+0x68/0x90 net/ipv4/tcp_output.c:3702
 tcp_cleanup_rbuf+0x764/0x800 net/ipv4/tcp.c:1578
 tcp_recvmsg+0x334d/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 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
RIP: 0033:0x47fd44
Code: ff ff cc cc cc cc e8 9b 40 fb ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 45 31 d2 45 31 c0 45 31 c9 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30
RSP: 002b:000000c4202b5760 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047fd44
RDX: 0000000000001000 RSI: 000000c42034c000 RDI: 0000000000000003
RBP: 000000c4202b57b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000010
R13: 0000000000000010 R14: 0000000000000002 R15: ffffffffffffffff

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]
 kmem_cache_alloc_node+0xaf4/0xe60 mm/slub.c:2836
 __alloc_skb+0x215/0xa10 net/core/skbuff.c:197
 alloc_skb include/linux/skbuff.h:1050 [inline]
 new_skb drivers/block/aoe/aoecmd.c:67 [inline]
 aoecmd_cfg_pkts drivers/block/aoe/aoecmd.c:426 [inline]
 aoecmd_cfg+0x205/0xa80 drivers/block/aoe/aoecmd.c:1372
 discover_timer+0x86/0xa0 drivers/block/aoe/aoemain.c:24
 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:1139
 apic_timer_interrupt+0x2e/0x40 arch/x86/entry/entry_64.S:837
 metadata_is_contiguous+0x262/0x270 mm/kmsan/kmsan.c:532
 __msan_metadata_ptr_for_load_8+0x10/0x20 mm/kmsan/kmsan_instr.c:55
 dev_net include/net/net_namespace.h:320 [inline]
 rt_is_expired net/ipv4/route.c:422 [inline]
 ipv4_dst_check+0xdd/0x1b0 net/ipv4/route.c:1190
 __sk_dst_check+0x13b/0x2d0 net/core/sock.c:546
 __ip_queue_xmit+0x1a7/0x21f0 net/ipv4/ip_output.c:475
 ip_queue_xmit+0xcc/0xf0 include/net/ip.h:237
 __tcp_transmit_skb+0x40e3/0x5d90 net/ipv4/tcp_output.c:1169
 __tcp_send_ack+0x701/0x840 net/ipv4/tcp_output.c:3696
 tcp_send_ack+0x68/0x90 net/ipv4/tcp_output.c:3702
 tcp_cleanup_rbuf+0x764/0x800 net/ipv4/tcp.c:1578
 tcp_recvmsg+0x334d/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 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

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
 native_safe_halt arch/x86/include/asm/irqflags.h:60 [inline]
 arch_safe_halt arch/x86/include/asm/irqflags.h:103 [inline]
 default_idle+0x53/0x90 arch/x86/kernel/process.c:580
 arch_cpu_idle+0x25/0x30 arch/x86/kernel/process.c:571
 default_idle_call kernel/sched/idle.c:94 [inline]
 cpuidle_idle_call kernel/sched/idle.c:154 [inline]
 do_idle+0x1d5/0x780 kernel/sched/idle.c:263
 cpu_startup_entry+0x45/0x50 kernel/sched/idle.c:355
 rest_init+0x1be/0x1f0 init/main.c:452
 arch_call_rest_init+0x13/0x15
 start_kernel+0x987/0xb57 init/main.c:787
 x86_64_start_reservations+0x18/0x2e arch/x86/kernel/head64.c:490
 x86_64_start_kernel+0x81/0x84 arch/x86/kernel/head64.c:471
 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241
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