================================================================== 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: 0 PID: 11914 Comm: syz-executor.3 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 __pskb_copy_fclone+0x178/0x1670 net/core/skbuff.c:1553 __pskb_copy include/linux/skbuff.h:1120 [inline] create_tagged_skb net/hsr/hsr_forward.c:158 [inline] frame_get_tagged_skb net/hsr/hsr_forward.c:194 [inline] hsr_forward_do net/hsr/hsr_forward.c:273 [inline] hsr_forward_skb+0x1a7d/0x3070 net/hsr/hsr_forward.c:361 hsr_dev_xmit+0xf8/0x160 net/hsr/hsr_device.c:231 __netdev_start_xmit include/linux/netdevice.h:4406 [inline] netdev_start_xmit include/linux/netdevice.h:4420 [inline] xmit_one net/core/dev.c:3280 [inline] dev_hard_start_xmit+0x51a/0xab0 net/core/dev.c:3296 __dev_queue_xmit+0x394d/0x4270 net/core/dev.c:3869 dev_queue_xmit+0x4b/0x60 net/core/dev.c:3902 neigh_connected_output+0x66f/0x6f0 net/core/neighbour.c:1519 neigh_output include/net/neighbour.h:511 [inline] ip6_finish_output2+0x2129/0x2670 net/ipv6/ip6_output.c:116 __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] NF_HOOK include/linux/netfilter.h:305 [inline] mld_sendpack+0xebd/0x13d0 net/ipv6/mcast.c:1682 mld_send_cr net/ipv6/mcast.c:1978 [inline] mld_ifc_timer_expire+0x116b/0x1680 net/ipv6/mcast.c:2477 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:__nr_to_section include/linux/mmzone.h:1234 [inline] RIP: 0010:pfn_valid include/linux/mmzone.h:1344 [inline] RIP: 0010:my_virt_addr_valid mm/kmsan/kmsan_shadow.c:104 [inline] RIP: 0010:virt_to_page_or_null+0x69/0x100 mm/kmsan/kmsan_shadow.c:157 Code: ad 57 5e 0d 48 01 c2 48 89 d1 48 c1 e9 2e 74 03 31 c0 c3 48 8b 0d 27 bc 26 0e 48 85 c9 74 32 48 89 d6 48 c1 ee 22 4c 8b 0c f1 <4d> 85 c9 74 25 48 89 d6 48 c1 ee 1b 83 e6 7f 48 c1 e6 05 4c 89 c9 RSP: 0018:ffff88804fe9fc98 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff8880cdd2dc10 RBX: ffffffff902c1000 RCX: ffff88821fff1000 RDX: 000000004dd2dc10 RSI: 0000000000000000 RDI: ffff88804dd2dc10 RBP: ffff88804fe9fcd0 R08: ffffea000000000f R09: ffff88812fffb000 R10: 0000000000000004 R11: ffffffff843eaca0 R12: ffff88804dd2dc10 R13: ffff88804dd2dc10 R14: ffff88804dd2dc10 R15: 0000000000000008 __msan_metadata_ptr_for_load_8+0x10/0x20 mm/kmsan/kmsan_instr.c:55 vfs_getattr_nosec fs/stat.c:80 [inline] vfs_getattr+0x2a9/0x990 fs/stat.c:118 vfs_statx fs/stat.c:191 [inline] vfs_lstat include/linux/fs.h:3193 [inline] __do_sys_newlstat fs/stat.c:354 [inline] __se_sys_newlstat+0x17c/0xab0 fs/stat.c:348 __x64_sys_newlstat+0x3e/0x60 fs/stat.c:348 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x458ca5 Code: d4 ff ff ff 64 c7 00 16 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 83 ff 01 48 89 f0 77 30 48 89 c7 48 89 d6 b8 06 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 03 f3 c3 90 48 c7 c2 d4 ff ff ff f7 d8 64 89 RSP: 002b:0000000000a6ecb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000006 RAX: ffffffffffffffda RBX: 000000000006b609 RCX: 0000000000458ca5 RDX: 0000000000a6ecd0 RSI: 0000000000a6ecd0 RDI: 0000000000a6ed60 RBP: 00000000000004d8 R08: 0000000000000000 R09: 0000000000000010 R10: 000000000000000a R11: 0000000000000246 R12: 0000000000a6fdf0 R13: 00005555574ee940 R14: 0000000000000000 R15: 0000000000a6fdf0 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 __pskb_copy_fclone+0x178/0x1670 net/core/skbuff.c:1553 __pskb_copy include/linux/skbuff.h:1120 [inline] create_tagged_skb net/hsr/hsr_forward.c:158 [inline] frame_get_tagged_skb net/hsr/hsr_forward.c:194 [inline] hsr_forward_do net/hsr/hsr_forward.c:273 [inline] hsr_forward_skb+0x1a7d/0x3070 net/hsr/hsr_forward.c:361 hsr_dev_xmit+0xf8/0x160 net/hsr/hsr_device.c:231 __netdev_start_xmit include/linux/netdevice.h:4406 [inline] netdev_start_xmit include/linux/netdevice.h:4420 [inline] xmit_one net/core/dev.c:3280 [inline] dev_hard_start_xmit+0x51a/0xab0 net/core/dev.c:3296 __dev_queue_xmit+0x394d/0x4270 net/core/dev.c:3869 dev_queue_xmit+0x4b/0x60 net/core/dev.c:3902 neigh_connected_output+0x66f/0x6f0 net/core/neighbour.c:1519 neigh_output include/net/neighbour.h:511 [inline] ip6_finish_output2+0x2129/0x2670 net/ipv6/ip6_output.c:116 __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] NF_HOOK include/linux/netfilter.h:305 [inline] mld_sendpack+0xebd/0x13d0 net/ipv6/mcast.c:1682 mld_send_cr net/ipv6/mcast.c:1978 [inline] mld_ifc_timer_expire+0x116b/0x1680 net/ipv6/mcast.c:2477 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 __nr_to_section include/linux/mmzone.h:1234 [inline] pfn_valid include/linux/mmzone.h:1344 [inline] my_virt_addr_valid mm/kmsan/kmsan_shadow.c:104 [inline] virt_to_page_or_null+0x69/0x100 mm/kmsan/kmsan_shadow.c:157 __msan_metadata_ptr_for_load_8+0x10/0x20 mm/kmsan/kmsan_instr.c:55 vfs_getattr_nosec fs/stat.c:80 [inline] vfs_getattr+0x2a9/0x990 fs/stat.c:118 vfs_statx fs/stat.c:191 [inline] vfs_lstat include/linux/fs.h:3193 [inline] __do_sys_newlstat fs/stat.c:354 [inline] __se_sys_newlstat+0x17c/0xab0 fs/stat.c:348 __x64_sys_newlstat+0x3e/0x60 fs/stat.c:348 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_flush+0xb0/0x100 net/core/skbuff.c:862 net_rx_action+0x1908/0x1950 net/core/dev.c:6441 __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 ==================================================================