================================================================== BUG: KMSAN: uninit-value in slab_alloc_node mm/slub.c:2749 [inline] BUG: KMSAN: uninit-value in kmem_cache_alloc_node+0x5d0/0xe70 mm/slub.c:2828 CPU: 1 PID: 11321 Comm: syz-fuzzer Not tainted 5.3.0-rc7+ #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+0x162/0x2d0 mm/kmsan/kmsan_report.c:109 __msan_warning+0x75/0xe0 mm/kmsan/kmsan_instr.c:294 slab_alloc_node mm/slub.c:2749 [inline] kmem_cache_alloc_node+0x5d0/0xe70 mm/slub.c:2828 __alloc_skb+0x215/0xa10 net/core/skbuff.c:197 alloc_skb include/linux/skbuff.h:1056 [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:1322 expire_timers kernel/time/timer.c:1366 [inline] __run_timers+0xcdc/0x11a0 kernel/time/timer.c:1685 run_timer_softirq+0x2d/0x50 kernel/time/timer.c:1698 __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:537 smp_apic_timer_interrupt+0x48/0x70 arch/x86/kernel/apic/apic.c:1135 apic_timer_interrupt+0x2e/0x40 arch/x86/entry/entry_64.S:837 RIP: 0010:my_phys_addr_valid mm/kmsan/kmsan_shadow.c:71 [inline] RIP: 0010:my_virt_addr_valid mm/kmsan/kmsan_shadow.c:96 [inline] RIP: 0010:kmsan_get_shadow_origin_ptr+0x150/0x4c0 mm/kmsan/kmsan_shadow.c:181 Code: 00 00 00 00 80 77 00 00 4c 89 f1 48 81 e9 00 00 00 80 48 89 4d d0 0f 83 12 03 00 00 4c 01 f0 48 39 c8 77 59 8a 0d f1 39 c3 0d <48> 89 c2 48 d3 ea 48 85 d2 75 48 48 89 c1 48 c1 e9 2e 75 3f 48 8b RSP: 0018:ffff8880b1e2f480 EFLAGS: 00000207 ORIG_RAX: ffffffffffffff13 RAX: 00000000b92719bc RBX: ffff8880b92719bc RCX: ffff88813927192e RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880b92719bc RBP: ffff8880b1e2f4b0 R08: 00000000fe4001da R09: ffff8880b3011268 R10: 0000000000000004 R11: ffffffff813ed6f0 R12: ffffffff902c1000 R13: ffff8880b92719bc R14: ffff8880b92719bc R15: 0000000000000004 __msan_metadata_ptr_for_load_4+0x10/0x20 mm/kmsan/kmsan_instr.c:54 before include/net/tcp.h:270 [inline] tcp_rcv_rtt_measure net/ipv4/tcp_input.c:562 [inline] tcp_event_data_recv+0x836/0x1710 net/ipv4/tcp_input.c:684 tcp_rcv_established+0x2c33/0x31f0 net/ipv4/tcp_input.c:5618 tcp_v4_do_rcv+0x684/0xd70 net/ipv4/tcp_ipv4.c:1542 sk_backlog_rcv include/net/sock.h:945 [inline] __release_sock+0x448/0x640 net/core/sock.c:2427 release_sock+0x99/0x2a0 net/core/sock.c:2943 tcp_recvmsg+0x335f/0x4ff0 net/ipv4/tcp.c:2181 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:1864 [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+0xbc/0xf0 arch/x86/entry/common.c:297 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:000000c420355710 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 000000000047fd44 RDX: 0000000000001000 RSI: 000000c420142000 RDI: 0000000000000003 RBP: 000000c420355760 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000008 R13: 0000000000000008 R14: 0000000000000002 R15: ffffffffffffffff Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:174 [inline] kmsan_internal_chain_origin+0xcc/0x150 mm/kmsan/kmsan.c:332 __msan_chain_origin+0x6b/0xe0 mm/kmsan/kmsan_instr.c:190 ___slab_alloc+0x1dbc/0x1fb0 mm/slub.c:2634 __slab_alloc mm/slub.c:2687 [inline] slab_alloc_node mm/slub.c:2750 [inline] kmem_cache_alloc_node+0x769/0xe70 mm/slub.c:2828 __alloc_skb+0x215/0xa10 net/core/skbuff.c:197 alloc_skb include/linux/skbuff.h:1056 [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:1322 expire_timers kernel/time/timer.c:1366 [inline] __run_timers+0xcdc/0x11a0 kernel/time/timer.c:1685 run_timer_softirq+0x2d/0x50 kernel/time/timer.c:1698 __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:537 smp_apic_timer_interrupt+0x48/0x70 arch/x86/kernel/apic/apic.c:1135 apic_timer_interrupt+0x2e/0x40 arch/x86/entry/entry_64.S:837 my_phys_addr_valid mm/kmsan/kmsan_shadow.c:71 [inline] my_virt_addr_valid mm/kmsan/kmsan_shadow.c:96 [inline] kmsan_get_shadow_origin_ptr+0x150/0x4c0 mm/kmsan/kmsan_shadow.c:181 __msan_metadata_ptr_for_load_4+0x10/0x20 mm/kmsan/kmsan_instr.c:54 before include/net/tcp.h:270 [inline] tcp_rcv_rtt_measure net/ipv4/tcp_input.c:562 [inline] tcp_event_data_recv+0x836/0x1710 net/ipv4/tcp_input.c:684 tcp_rcv_established+0x2c33/0x31f0 net/ipv4/tcp_input.c:5618 tcp_v4_do_rcv+0x684/0xd70 net/ipv4/tcp_ipv4.c:1542 sk_backlog_rcv include/net/sock.h:945 [inline] __release_sock+0x448/0x640 net/core/sock.c:2427 release_sock+0x99/0x2a0 net/core/sock.c:2943 tcp_recvmsg+0x335f/0x4ff0 net/ipv4/tcp.c:2181 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:1864 [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+0xbc/0xf0 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x63/0xe7 Uninit was created at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:174 [inline] kmsan_internal_poison_shadow+0x58/0xb0 mm/kmsan/kmsan.c:134 kmsan_slab_free+0x8d/0x100 mm/kmsan/kmsan_hooks.c:123 slab_free_freelist_hook mm/slub.c:1472 [inline] slab_free mm/slub.c:3038 [inline] kmem_cache_free_bulk+0x3ad9/0x3f50 mm/slub.c:3163 _kfree_skb_defer net/core/skbuff.c:885 [inline] napi_consume_skb+0x593/0x5d0 net/core/skbuff.c:918 free_old_xmit_skbs+0x1a1/0x450 drivers/net/virtio_net.c:1366 virtnet_poll_tx+0x24c/0x4c0 drivers/net/virtio_net.c:1493 napi_poll net/core/dev.c:6352 [inline] net_rx_action+0x74b/0x1950 net/core/dev.c:6418 __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:537 [inline] do_IRQ+0x20d/0x3a0 arch/x86/kernel/irq.c:259 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+0x1d7/0x790 kernel/sched/idle.c:263 cpu_startup_entry+0x45/0x50 kernel/sched/idle.c:354 start_secondary+0x370/0x470 arch/x86/kernel/smpboot.c:264 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241 ==================================================================