syzkaller login: [ 28.722970] BUG: Bad rss-counter state mm:000000002c5d5c6c type:MM_FILEPAGES val:33 [ 28.724346] BUG: Bad rss-counter state mm:000000002c5d5c6c type:MM_ANONPAGES val:22 [ 28.882739] ================================================================== [ 28.883650] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.884695] Read of size 8 at addr ffff88801a88e140 by task sshd/220 [ 28.885462] [ 28.885681] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.886561] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.887538] Call Trace: [ 28.887870] [ 28.888154] dump_stack_lvl+0x91/0xf0 [ 28.888648] print_report+0xcc/0x620 [ 28.889136] ? __virt_addr_valid+0x102/0x340 [ 28.889687] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.890296] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.890912] kasan_report+0xbe/0xf0 [ 28.891387] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.892034] vma_interval_tree_remove+0xc75/0xec0 [ 28.892646] vma_prepare+0xc54/0x11a0 [ 28.893126] __split_vma+0x5af/0x950 [ 28.893597] ? __pfx___split_vma+0x10/0x10 [ 28.894122] ? find_held_lock+0x2c/0x110 [ 28.894645] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.895211] ? lock_is_held_type+0x9f/0x120 [ 28.895750] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.896360] ? mtree_range_walk+0x632/0x900 [ 28.896914] ? mas_walk+0x5c7/0x7c0 [ 28.897386] do_vmi_munmap+0x1f1/0x2b0 [ 28.897876] mmap_region+0x1f9/0x2660 [ 28.898358] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.898875] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.899587] ? __pfx_lock_acquire+0x10/0x10 [ 28.900143] ? __pfx_mmap_region+0x10/0x10 [ 28.900675] ? security_mmap_addr+0x7d/0xa0 [ 28.901207] ? get_unmapped_area+0x1f5/0x3f0 [ 28.901766] do_mmap+0x854/0xf00 [ 28.902208] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.902704] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.903265] ksys_mmap_pgoff+0x3af/0x500 [ 28.903780] do_syscall_64+0x3f/0x90 [ 28.904269] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.904914] RIP: 0033:0x7fc5db1b3d82 [ 28.905372] 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 [ 28.907491] RSP: 002b:00007fff8c1ff3c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.908410] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc5db1b3d82 [ 28.909258] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc5da5ed000 [ 28.910092] RBP: 00007fc5da5ed000 R08: 0000000000000009 R09: 0000000000001000 [ 28.910942] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b2f80e3ec0 [ 28.911815] R13: 00007fff8c1ff3e0 R14: 00007fff8c1ff410 R15: 00007fff8c1ff770 [ 28.912676] [ 28.912969] [ 28.913185] Allocated by task 213: [ 28.913614] kasan_save_stack+0x22/0x50 [ 28.914122] kasan_set_track+0x25/0x30 [ 28.914617] __kasan_slab_alloc+0x59/0x70 [ 28.915141] kmem_cache_alloc+0x16b/0x370 [ 28.915657] vm_area_dup+0x20/0x160 [ 28.916117] __split_vma+0x170/0x950 [ 28.916587] split_vma+0xc6/0x110 [ 28.917023] mprotect_fixup+0x8d2/0xb30 [ 28.917523] do_mprotect_pkey+0x87e/0xd40 [ 28.918044] __x64_sys_mprotect+0x78/0xc0 [ 28.918564] do_syscall_64+0x3f/0x90 [ 28.919040] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.919681] [ 28.919913] Freed by task 213: [ 28.920307] kasan_save_stack+0x22/0x50 [ 28.920812] kasan_set_track+0x25/0x30 [ 28.921308] kasan_save_free_info+0x2b/0x50 [ 28.921839] __kasan_slab_free+0x10a/0x190 [ 28.922371] kmem_cache_free+0x10d/0x4d0 [ 28.922873] rcu_core+0x8c8/0x2860 [ 28.923317] __do_softirq+0x1b7/0x7d4 [ 28.923809] [ 28.924031] Last potentially related work creation: [ 28.924614] kasan_save_stack+0x22/0x50 [ 28.925113] __kasan_record_aux_stack+0x8e/0xa0 [ 28.925686] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.926326] remove_vma+0x139/0x170 [ 28.926778] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.927334] do_vmi_munmap+0x1f1/0x2b0 [ 28.927829] __vm_munmap+0x138/0x3a0 [ 28.928294] __x64_sys_munmap+0x59/0x80 [ 28.928791] do_syscall_64+0x3f/0x90 [ 28.929272] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.929906] [ 28.930118] Second to last potentially related work creation: [ 28.930797] kasan_save_stack+0x22/0x50 [ 28.931295] __kasan_record_aux_stack+0x8e/0xa0 [ 28.931886] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.932530] remove_vma+0x139/0x170 [ 28.932983] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.933535] do_vmi_munmap+0x1f1/0x2b0 [ 28.934023] mmap_region+0x1f9/0x2660 [ 28.934500] do_mmap+0x854/0xf00 [ 28.934928] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.935476] ksys_mmap_pgoff+0x7d/0x500 [ 28.935985] do_syscall_64+0x3f/0x90 [ 28.936460] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.937109] [ 28.937325] The buggy address belongs to the object at ffff88801a88e0e8 [ 28.937325] which belongs to the cache vm_area_struct of size 168 [ 28.938783] The buggy address is located 88 bytes inside of [ 28.938783] freed 168-byte region [ffff88801a88e0e8, ffff88801a88e190) [ 28.940195] [ 28.940407] The buggy address belongs to the physical page: [ 28.941058] page:00000000b24b1cc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a88e [ 28.942144] memcg:ffff88800de82e01 [ 28.942570] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.943261] page_type: 0xffffffff() [ 28.943714] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 0000000000000001 [ 28.944657] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de82e01 [ 28.945562] page dumped because: kasan: bad access detected [ 28.946224] [ 28.946441] Memory state around the buggy address: [ 28.947014] ffff88801a88e000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.947865] ffff88801a88e080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 28.948718] >ffff88801a88e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.949563] ^ [ 28.950187] ffff88801a88e180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 28.951031] ffff88801a88e200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 28.951902] ================================================================== [ 28.953057] Disabling lock debugging due to kernel taint [ 31.582207] BUG: Bad rss-counter state mm:00000000d9d686e1 type:MM_FILEPAGES val:33 [ 31.583187] BUG: Bad rss-counter state mm:00000000d9d686e1 type:MM_ANONPAGES val:22 [ 32.041971] BUG: Bad rss-counter state mm:00000000f77307db type:MM_FILEPAGES val:33 [ 32.043334] BUG: Bad rss-counter state mm:00000000f77307db type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43599' (ECDSA) to the list of known hosts. 2023/06/20 23:30:14 fuzzer started 2023/06/20 23:30:14 dialing manager at localhost:36067 2023/06/20 23:30:14 checking machine... 2023/06/20 23:30:14 checking revisions... [ 32.761872] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:30:14 testing simple program... [ 32.806183] cgroup: Unknown subsys name 'net' [ 32.850300] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:30:14 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f606e0e4008 CR3=0000000018544000 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=2034313a30333a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a30333a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff864aa543 RBX=0000000000000001 RCX=ffffffff864aa53e RDX=0000000000000002 RSI=0000000000000003 RDI=ffffffff860499d0 RBP=ffff88800d797400 RSP=ffff88800d797338 R8 =ffffffff864aa51a R9 =ffff88800d7973e8 R10=0000000000038001 R11=00000000000b3c03 R12=ffff88800d797408 R13=ffff88800d7973f0 R14=ffff88800d7973e9 R15=ffff88800d7973a8 RIP=ffffffff81130a72 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 00007f45f1687900 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=00007f45f1647008 CR3=000000000f12c000 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