================================================================== 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: 21961 Comm: udevd 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:kmsan_slab_free+0xac/0x100 mm/kmsan/kmsan_hooks.c:198 Code: 00 b9 01 00 00 00 e8 83 c9 ff ff 65 ff 0d b0 e7 fe 7d 65 8b 05 a9 e7 fe 7d 85 c0 75 2e e8 fc 18 38 ff 4c 89 7d d0 ff 75 d0 9d <65> 48 8b 04 25 28 00 00 00 48 3b 45 e0 75 0b 48 83 c4 18 5b 41 5e RSP: 0018:ffff88805693f410 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffff88812f819dc0 RCX: 0000000000000011 RDX: 0000000000000010 RSI: ffffd0ffffffffff RDI: ffff8880a1db3f80 RBP: ffff88805693f440 R08: ffffea000000000f R09: ffff88812fffb000 R10: 0000000000000010 R11: ffffffff8182a660 R12: 0000000000000000 R13: 0000000000000000 R14: ffff8880a1db3f40 R15: 0000000000000246 slab_free_freelist_hook mm/slub.c:1472 [inline] slab_free mm/slub.c:3038 [inline] kmem_cache_free+0x2d1/0x2b70 mm/slub.c:3054 anon_vma_chain_free mm/rmap.c:134 [inline] unlink_anon_vmas+0xa2b/0xb70 mm/rmap.c:419 free_pgtables+0x2e2/0x6a0 mm/memory.c:396 exit_mmap+0x53f/0xa00 mm/mmap.c:3146 __mmput+0x148/0x590 kernel/fork.c:1066 mmput+0x83/0x90 kernel/fork.c:1087 exec_mmap fs/exec.c:1047 [inline] flush_old_exec+0xde1/0x2150 fs/exec.c:1280 load_elf_binary+0xfc5/0x5f60 fs/binfmt_elf.c:867 search_binary_handler+0x2f4/0xac0 fs/exec.c:1658 exec_binprm fs/exec.c:1701 [inline] __do_execve_file+0x2218/0x2ee0 fs/exec.c:1821 do_execveat_common fs/exec.c:1868 [inline] do_execve fs/exec.c:1885 [inline] __do_sys_execve fs/exec.c:1961 [inline] __se_sys_execve+0xec/0x110 fs/exec.c:1956 __x64_sys_execve+0x4a/0x70 fs/exec.c:1956 do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x7fef224e3207 Code: Bad RIP value. RSP: 002b:00007fff4f591e48 EFLAGS: 00000206 ORIG_RAX: 000000000000003b RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007fef224e3207 RDX: 0000000000ec4ea0 RSI: 00007fff4f591f40 RDI: 00007fff4f592f50 RBP: 0000000000625500 R08: 00000000000032fa R09: 00000000000032fa R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000ec4ea0 R13: 0000000000000007 R14: 0000000000ebe250 R15: 0000000000000005 Uninit was stored to memory at: kmsan_save_stack_with_flags mm/kmsan/kmsan.c:189 [inline] kmsan_internal_chain_origin+0xcc/0x150 mm/kmsan/kmsan.c:347 __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 native_restore_fl arch/x86/include/asm/irqflags.h:41 [inline] arch_local_irq_restore arch/x86/include/asm/irqflags.h:84 [inline] kmsan_slab_free+0xac/0x100 mm/kmsan/kmsan_hooks.c:198 slab_free_freelist_hook mm/slub.c:1472 [inline] slab_free mm/slub.c:3038 [inline] kmem_cache_free+0x2d1/0x2b70 mm/slub.c:3054 anon_vma_chain_free mm/rmap.c:134 [inline] unlink_anon_vmas+0xa2b/0xb70 mm/rmap.c:419 free_pgtables+0x2e2/0x6a0 mm/memory.c:396 exit_mmap+0x53f/0xa00 mm/mmap.c:3146 __mmput+0x148/0x590 kernel/fork.c:1066 mmput+0x83/0x90 kernel/fork.c:1087 exec_mmap fs/exec.c:1047 [inline] flush_old_exec+0xde1/0x2150 fs/exec.c:1280 load_elf_binary+0xfc5/0x5f60 fs/binfmt_elf.c:867 search_binary_handler+0x2f4/0xac0 fs/exec.c:1658 exec_binprm fs/exec.c:1701 [inline] __do_execve_file+0x2218/0x2ee0 fs/exec.c:1821 do_execveat_common fs/exec.c:1868 [inline] do_execve fs/exec.c:1885 [inline] __do_sys_execve fs/exec.c:1961 [inline] __se_sys_execve+0xec/0x110 fs/exec.c:1956 __x64_sys_execve+0x4a/0x70 fs/exec.c:1956 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:189 [inline] kmsan_internal_poison_shadow+0x58/0xb0 mm/kmsan/kmsan.c:148 kmsan_slab_free+0x8d/0x100 mm/kmsan/kmsan_hooks.c:195 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 rest_init+0x1be/0x1f0 init/main.c:452 arch_call_rest_init+0x13/0x15 start_kernel+0x991/0xb61 init/main.c:788 x86_64_start_reservations+0x18/0x2e arch/x86/kernel/head64.c:472 x86_64_start_kernel+0x81/0x84 arch/x86/kernel/head64.c:453 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:241 ==================================================================