syzkaller login: [ 41.211589] BUG: Bad rss-counter state mm:0000000080961e8a type:MM_FILEPAGES val:33 [ 41.212731] BUG: Bad rss-counter state mm:0000000080961e8a type:MM_ANONPAGES val:22 [ 41.280374] ================================================================== [ 41.281379] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.282395] Read of size 8 at addr ffff888014559a50 by task sshd/225 [ 41.283352] [ 41.283592] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.284520] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.285623] Call Trace: [ 41.285977] [ 41.286297] dump_stack_lvl+0x91/0xf0 [ 41.286825] print_report+0xcc/0x620 [ 41.287347] ? __virt_addr_valid+0x102/0x340 [ 41.287948] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.288609] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.289270] kasan_report+0xbe/0xf0 [ 41.289786] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.290469] vma_interval_tree_remove+0xc75/0xec0 [ 41.291114] vma_prepare+0xc54/0x11a0 [ 41.291628] __split_vma+0x5af/0x950 [ 41.292132] ? __pfx___split_vma+0x10/0x10 [ 41.292697] ? find_held_lock+0x2c/0x110 [ 41.293267] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.293886] ? lock_is_held_type+0x9f/0x120 [ 41.294486] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.295146] ? mtree_range_walk+0x632/0x900 [ 41.295742] ? mas_walk+0x5c7/0x7c0 [ 41.296252] do_vmi_munmap+0x1f1/0x2b0 [ 41.296787] mmap_region+0x1f9/0x2660 [ 41.297304] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.297863] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.298639] ? __pfx_lock_acquire+0x10/0x10 [ 41.299211] ? __pfx_mmap_region+0x10/0x10 [ 41.299786] ? security_mmap_addr+0x7d/0xa0 [ 41.300361] ? get_unmapped_area+0x1f5/0x3f0 [ 41.300952] do_mmap+0x854/0xf00 [ 41.301425] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.301972] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.302607] ksys_mmap_pgoff+0x3af/0x500 [ 41.303171] do_syscall_64+0x3f/0x90 [ 41.303688] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.304383] RIP: 0033:0x7f6981904d82 [ 41.304878] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 41.307196] RSP: 002b:00007fff957752a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.308180] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6981904d82 [ 41.309119] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6980d3e000 [ 41.310036] RBP: 00007f6980d3e000 R08: 0000000000000009 R09: 0000000000001000 [ 41.310966] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a19cea4b20 [ 41.311878] R13: 00007fff957752c0 R14: 00007fff957752f0 R15: 00007fff95775650 [ 41.312828] [ 41.313148] [ 41.313376] Allocated by task 218: [ 41.313837] kasan_save_stack+0x22/0x50 [ 41.314394] kasan_set_track+0x25/0x30 [ 41.314930] __kasan_slab_alloc+0x59/0x70 [ 41.315495] kmem_cache_alloc+0x16b/0x370 [ 41.316059] vm_area_dup+0x20/0x160 [ 41.316553] __split_vma+0x170/0x950 [ 41.317056] split_vma+0xc6/0x110 [ 41.317532] mprotect_fixup+0x8d2/0xb30 [ 41.318079] do_mprotect_pkey+0x87e/0xd40 [ 41.318644] __x64_sys_mprotect+0x78/0xc0 [ 41.319210] do_syscall_64+0x3f/0x90 [ 41.319721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.320418] [ 41.320646] Freed by task 218: [ 41.321062] kasan_save_stack+0x22/0x50 [ 41.321606] kasan_set_track+0x25/0x30 [ 41.322157] kasan_save_free_info+0x2b/0x50 [ 41.322752] __kasan_slab_free+0x10a/0x190 [ 41.323339] kmem_cache_free+0x10d/0x4d0 [ 41.323893] rcu_core+0x8c8/0x2860 [ 41.324441] __do_softirq+0x1b7/0x7d4 [ 41.324958] [ 41.325189] Last potentially related work creation: [ 41.325815] kasan_save_stack+0x22/0x50 [ 41.326382] __kasan_record_aux_stack+0x8e/0xa0 [ 41.327018] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.327708] remove_vma+0x139/0x170 [ 41.328197] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.328797] do_vmi_munmap+0x1f1/0x2b0 [ 41.329338] __vm_munmap+0x138/0x3a0 [ 41.329857] __x64_sys_munmap+0x59/0x80 [ 41.330398] do_syscall_64+0x3f/0x90 [ 41.330914] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.331599] [ 41.331827] The buggy address belongs to the object at ffff8880145599f8 [ 41.331827] which belongs to the cache vm_area_struct of size 168 [ 41.333423] The buggy address is located 88 bytes inside of [ 41.333423] freed 168-byte region [ffff8880145599f8, ffff888014559aa0) [ 41.334956] [ 41.335191] The buggy address belongs to the physical page: [ 41.335896] page:00000000ff0c7b53 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14559 [ 41.337106] memcg:ffff8880160c3401 [ 41.337568] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.338274] page_type: 0xffffffff() [ 41.338753] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.339742] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880160c3401 [ 41.340723] page dumped because: kasan: bad access detected [ 41.341435] [ 41.341667] Memory state around the buggy address: [ 41.342309] ffff888014559900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.343253] ffff888014559980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 41.344179] >ffff888014559a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.345094] ^ [ 41.345863] ffff888014559a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 41.346789] ffff888014559b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.347701] ================================================================== [ 41.348977] Disabling lock debugging due to kernel taint [ 44.050429] BUG: Bad rss-counter state mm:00000000aac15d0c type:MM_FILEPAGES val:33 [ 44.051201] BUG: Bad rss-counter state mm:00000000aac15d0c type:MM_ANONPAGES val:22 [ 44.430296] BUG: Bad rss-counter state mm:000000009aa421b9 type:MM_FILEPAGES val:33 [ 44.431099] BUG: Bad rss-counter state mm:000000009aa421b9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35465' (ECDSA) to the list of known hosts. 2023/06/19 19:12:28 fuzzer started 2023/06/19 19:12:28 dialing manager at localhost:44161 2023/06/19 19:12:28 checking machine... 2023/06/19 19:12:28 checking revisions... [ 45.042118] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:12:28 testing simple program... [ 45.082663] cgroup: Unknown subsys name 'net' [ 45.133389] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:12:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86137cac RDX=0000000000000008 RSI=ffff88800ec97b78 RDI=ffff88800ec97820 RBP=ffff88800ec97878 RSP=ffff88800ec97790 R8 =0000000000000001 R9 =ffff88800ec97860 R10=0000000000038001 R11=0000000000020ed0 R12=ffff88800ec97880 R13=ffff88800ec97868 R14=ffff88800ec97b78 R15=ffff88800ec97820 RIP=ffffffff81130400 RFL=00000287 [--S--PC] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fc7ea17e7d0 CR3=000000000c6fc000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2038323a32313a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3433 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3433325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a32313a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed1001b71eb4 RBX=ffff88800db8f2f8 RCX=0000000000000000 RDX=ffff8880158c3680 RSI=ffffffff844b7fa4 RDI=ffff88800db8f318 RBP=00007fafa4dbe000 RSP=ffff88800db8f178 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=ffff88800f1e2e80 R12=0000000000000000 R13=0000000000000000 R14=dffffc0000000000 R15=0000000000000000 RIP=ffffffff844b8024 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fafa4e0b900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fafa4dd0008 CR3=000000000c74c000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000