Message-ID: <CACkBjsZERr5LPkyTha5jkATx2udEFVViFYVoVa_-QehQETmA7Q@mail.gmail.com>
Date:   Wed, 8 Sep 2021 16:10:17 +0800
From:   Hao Sun <sunhao.th@...il.com>
To:     jbaron@...mai.com, jpoimboe@...hat.com,
        linux-kernel@...r.kernel.org, peterz@...radead.org
Cc:     ardb@...nel.org, rostedt@...dmis.org
Subject: WARNING in __static_key_slow_dec_deferred

Hello,

When using Healer to fuzz the latest Linux kernel, the following crash
was triggered.

HEAD commit: ac08b1c68d1b Merge tag 'pci-v5.15-changes'
git tree: upstream
console output:
https://drive.google.com/file/d/18VO37lgTvr6OLFJy4r0lOquCYXTV7mKD/view?usp=sharing
kernel config: https://drive.google.com/file/d/1qrJUXD8ZIeAkg-xojzDpp04v9MtQ8RR6/view?usp=sharing
C reproducer: https://drive.google.com/file/d/1JI1EmZewm7fgdiHFXcODDGAtV70PYCXY/view?usp=sharing
Syzlang reproducer:
https://drive.google.com/file/d/1PjiSFUWZyLo655E8bTVfytsTjlMTN45F/view?usp=sharing

If you fix this issue, please add the following tag to the commit:
Reported-by: Hao Sun <sunhao.th@...il.com>

FAULT_INJECTION: forcing a failure.
name failslab, interval 1, probability 0, space 0, times 0
CPU: 2 PID: 9142 Comm: syz-executor Not tainted 5.14.0+ #15
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
Call Trace:
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x8d/0xcf lib/dump_stack.c:105
 fail_dump lib/fault-inject.c:52 [inline]
 should_fail+0x13c/0x160 lib/fault-inject.c:146
 should_failslab+0x5/0x10 mm/slab_common.c:1326
 slab_pre_alloc_hook.constprop.100+0x4e/0xc0 mm/slab.h:494
 slab_alloc_node mm/slub.c:2880 [inline]
 slab_alloc mm/slub.c:2967 [inline]
 kmem_cache_alloc+0x44/0x2a0 mm/slub.c:2972
 kmem_cache_zalloc include/linux/slab.h:711 [inline]
 lsm_file_alloc security/security.c:572 [inline]
 security_file_alloc+0x2c/0xb0 security/security.c:1515
 __alloc_file+0x7f/0x150 fs/file_table.c:106
 alloc_empty_file+0x4b/0x100 fs/file_table.c:150
 alloc_file+0x31/0x170 fs/file_table.c:192
 alloc_file_pseudo+0xb6/0x120 fs/file_table.c:232
 __shmem_file_setup.part.53+0xb9/0x150 mm/shmem.c:4085
 __shmem_file_setup mm/shmem.c:4148 [inline]
 shmem_kernel_file_setup mm/shmem.c:4104 [inline]
 shmem_zero_setup+0x6b/0x1f0 mm/shmem.c:4148
 mmap_region+0x62e/0x790 mm/mmap.c:1824
 do_mmap+0x438/0x670 mm/mmap.c:1575
 vm_mmap_pgoff+0x10d/0x1b0 mm/util.c:519
 vm_mmap+0x60/0x80 mm/util.c:538
 __x86_set_memory_region+0x233/0x340 arch/x86/kvm/x86.c:11271
 alloc_apic_access_page arch/x86/kvm/vmx/vmx.c:3648 [inline]
 vmx_create_vcpu+0xc4b/0x1930 arch/x86/kvm/vmx/vmx.c:6871
 kvm_arch_vcpu_create+0x256/0x460 arch/x86/kvm/x86.c:10724
 kvm_vm_ioctl_create_vcpu
arch/x86/kvm/../../../virt/kvm/kvm_main.c:3592 [inline]
 kvm_vm_ioctl+0x57c/0x1180 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4314
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl fs/ioctl.c:860 [inline]
 __x64_sys_ioctl+0xb6/0x100 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x34/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x46a9a9
Code: f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fad048d2c58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000078c0a0 RCX: 000000000046a9a9
RDX: 0000000000000000 RSI: 000000000000ae41 RDI: 0000000000000004
RBP: 00007fad048d2c90 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000017
R13: 0000000000000000 R14: 000000000078c0a0 R15: 00007fff737be610
------------[ cut here ]------------
jump label: negative count!
WARNING: CPU: 2 PID: 9142 at kernel/jump_label.c:235
static_key_slow_try_dec+0x88/0xa0 kernel/jump_label.c:235
Modules linked in:
CPU: 2 PID: 9142 Comm: syz-executor Not tainted 5.14.0+ #15
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
RSP: 0018:ffffc900027b3d90 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 00000000ffffffff RCX: ffffc90000b35000
RDX: 0000000000040000 RSI: ffffffff812d185c RDI: 00000000ffffffff
RBP: ffffffff860d83a0 R08: 0000000000000000 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000000 R12: 00000000ffffffff
R13: ffff888018411040 R14: ffffc900027b71e8 R15: 0000000000000004
FS:  00007fad048d3700(0000) GS:ffff88813dd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000563eb1f86d08 CR3: 0000000108bac000 CR4: 0000000000752ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
PKRU: 55555554
Call Trace:
 __static_key_slow_dec_deferred+0x28/0x70 kernel/jump_label.c:286
 kvm_free_lapic+0xaf/0xd0 arch/x86/kvm/lapic.c:2211
 kvm_arch_vcpu_create+0x2f7/0x460 arch/x86/kvm/x86.c:10751
 kvm_vm_ioctl_create_vcpu
arch/x86/kvm/../../../virt/kvm/kvm_main.c:3592 [inline]
 kvm_vm_ioctl+0x57c/0x1180 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4314
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl fs/ioctl.c:860 [inline]
 __x64_sys_ioctl+0xb6/0x100 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x34/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x46a9a9
Code: f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fad048d2c58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000000000078c0a0 RCX: 000000000046a9a9
RDX: 0000000000000000 RSI: 000000000000ae41 RDI: 0000000000000004
RBP: 00007fad048d2c90 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000017
R13: 0000000000000000 R14: 000000000078c0a0 R15: 00007fff737be610%

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