KASAN: vmalloc-out-of-bounds Read in init_srcu_struct

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
android-5-10	KASAN: vmalloc-out-of-bounds Read in init_srcu_struct_fields (2)				1	819d	819d	0/2	auto-obsoleted due to no activity on 2022/11/25 15:27
upstream	KASAN: vmalloc-out-of-bounds Read in init_srcu_struct_fields kvm				1	1744d	1740d	0/28	auto-closed as invalid on 2020/05/14 08:36
==================================================================
BUG: KASAN: vmalloc-out-of-bounds in init_srcu_struct_nodes kernel/rcu/srcutree.c:153 [inline]
BUG: KASAN: vmalloc-out-of-bounds in init_srcu_struct_fields+0xfa4/0x1360 kernel/rcu/srcutree.c:183
Read of size 4 at addr ffffc9000267a3e0 by task syz-executor.1/22067

CPU: 0 PID: 22067 Comm: syz-executor.1 Not tainted 5.10.87-syzkaller-00611-gc4d08791d941 #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_lvl+0x1e2/0x24b lib/dump_stack.c:118
 print_address_description+0x8d/0x3d0 mm/kasan/report.c:233
 __kasan_report+0x142/0x220 mm/kasan/report.c:419
 kasan_report+0x51/0x70 mm/kasan/report.c:436
 __asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308
 init_srcu_struct_nodes kernel/rcu/srcutree.c:153 [inline]
 init_srcu_struct_fields+0xfa4/0x1360 kernel/rcu/srcutree.c:183
 init_srcu_struct+0x3b/0x60 kernel/rcu/srcutree.c:216
 kvm_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:770 [inline]
 kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:3990 [inline]
 kvm_dev_ioctl+0x2c3/0x1710 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4042
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl+0x115/0x190 fs/ioctl.c:739
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:739
 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7fcf3b2ebe99
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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:00007fcf3a3ff168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fcf3b3ff1d0 RCX: 00007fcf3b2ebe99
RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000005
RBP: 00007fcf3b345ff1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffae1f8c0f R14: 00007fcf3a3ff300 R15: 0000000000022000


Memory state around the buggy address:
 ffffc9000267a280: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
 ffffc9000267a300: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
>ffffc9000267a380: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
                                                       ^
 ffffc9000267a400: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
 ffffc9000267a480: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
==================================================================
BUG: unable to handle page fault for address: ffffc9000267a3e0
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 100000067 P4D 100000067 PUD 10012d067 PMD 14f93f067 PTE 0
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 22067 Comm: syz-executor.1 Tainted: G    B             5.10.87-syzkaller-00611-gc4d08791d941 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:init_srcu_struct_nodes kernel/rcu/srcutree.c:153 [inline]
RIP: 0010:init_srcu_struct_fields+0xea8/0x1360 kernel/rcu/srcutree.c:183
Code: 0e d0 4d 00 48 ba 00 00 00 00 00 fc ff df 48 8b 1b 48 83 c3 58 48 89 d8 48 c1 e8 03 8a 04 10 84 c0 0f 85 e7 00 00 00 44 89 f9 <2b> 0b b8 01 00 00 00 d3 e0 4c 63 f0 49 8d 9c 24 38 01 00 00 48 89
RSP: 0018:ffffc900025dfcc8 EFLAGS: 00010286
RAX: ffff88815c36bb01 RBX: ffffc9000267a3e0 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000246 RDI: 0000000000000001
RBP: ffffc900025dfd58 R08: ffffffff813fceb4 R09: fffffbfff0dc89b9
R10: fffffbfff0dc89b9 R11: 0000000000000000 R12: ffff8881f7000000
R13: ffffc900026851f0 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fcf3a3ff700(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc9000267a3e0 CR3: 000000015d5f6000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 init_srcu_struct+0x3b/0x60 kernel/rcu/srcutree.c:216
 kvm_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:770 [inline]
 kvm_dev_ioctl_create_vm arch/x86/kvm/../../../virt/kvm/kvm_main.c:3990 [inline]
 kvm_dev_ioctl+0x2c3/0x1710 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4042
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl+0x115/0x190 fs/ioctl.c:739
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:739
 do_syscall_64+0x31/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7fcf3b2ebe99
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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:00007fcf3a3ff168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fcf3b3ff1d0 RCX: 00007fcf3b2ebe99
RDX: 0000000000000000 RSI: 000000000000ae01 RDI: 0000000000000005
RBP: 00007fcf3b345ff1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fffae1f8c0f R14: 00007fcf3a3ff300 R15: 0000000000022000
Modules linked in:
CR2: ffffc9000267a3e0
---[ end trace 1d6ff0af2e86b1c8 ]---
RIP: 0010:init_srcu_struct_nodes kernel/rcu/srcutree.c:153 [inline]
RIP: 0010:init_srcu_struct_fields+0xea8/0x1360 kernel/rcu/srcutree.c:183
Code: 0e d0 4d 00 48 ba 00 00 00 00 00 fc ff df 48 8b 1b 48 83 c3 58 48 89 d8 48 c1 e8 03 8a 04 10 84 c0 0f 85 e7 00 00 00 44 89 f9 <2b> 0b b8 01 00 00 00 d3 e0 4c 63 f0 49 8d 9c 24 38 01 00 00 48 89
RSP: 0018:ffffc900025dfcc8 EFLAGS: 00010286
RAX: ffff88815c36bb01 RBX: ffffc9000267a3e0 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000246 RDI: 0000000000000001
RBP: ffffc900025dfd58 R08: ffffffff813fceb4 R09: fffffbfff0dc89b9
R10: fffffbfff0dc89b9 R11: 0000000000000000 R12: ffff8881f7000000
R13: ffffc900026851f0 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fcf3a3ff700(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffc9000267a3e0 CR3: 000000015d5f6000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	d0 4d 00             	rorb   0x0(%rbp)
   3:	48 ba 00 00 00 00 00 	movabs $0xdffffc0000000000,%rdx
   a:	fc ff df
   d:	48 8b 1b             	mov    (%rbx),%rbx
  10:	48 83 c3 58          	add    $0x58,%rbx
  14:	48 89 d8             	mov    %rbx,%rax
  17:	48 c1 e8 03          	shr    $0x3,%rax
  1b:	8a 04 10             	mov    (%rax,%rdx,1),%al
  1e:	84 c0                	test   %al,%al
  20:	0f 85 e7 00 00 00    	jne    0x10d
  26:	44 89 f9             	mov    %r15d,%ecx
* 29:	2b 0b                	sub    (%rbx),%ecx <-- trapping instruction
  2b:	b8 01 00 00 00       	mov    $0x1,%eax
  30:	d3 e0                	shl    %cl,%eax
  32:	4c 63 f0             	movslq %eax,%r14
  35:	49 8d 9c 24 38 01 00 	lea    0x138(%r12),%rbx
  3c:	00
  3d:	48                   	rex.W
  3e:	89                   	.byte 0x89