================================================================== 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