syzkaller login: [ 34.709414] BUG: Bad rss-counter state mm:00000000fbebedd4 type:MM_FILEPAGES val:33 [ 34.710487] BUG: Bad rss-counter state mm:00000000fbebedd4 type:MM_ANONPAGES val:22 [ 34.878626] ================================================================== [ 34.879757] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.880843] Read of size 8 at addr ffff88800c650ed8 by task sshd/221 [ 34.881662] [ 34.881885] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.882827] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.883849] Call Trace: [ 34.884179] [ 34.884486] dump_stack_lvl+0x91/0xf0 [ 34.884983] print_report+0xcc/0x620 [ 34.885498] ? __virt_addr_valid+0x102/0x340 [ 34.886107] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.886749] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.887395] kasan_report+0xbe/0xf0 [ 34.887906] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.888542] vma_interval_tree_remove+0xc75/0xec0 [ 34.889157] vma_prepare+0xc54/0x11a0 [ 34.889631] __split_vma+0x5af/0x950 [ 34.890122] ? __pfx___split_vma+0x10/0x10 [ 34.890652] ? find_held_lock+0x2c/0x110 [ 34.891206] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.891773] ? lock_is_held_type+0x9f/0x120 [ 34.892348] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.892988] ? mtree_range_walk+0x632/0x900 [ 34.893552] ? mas_walk+0x5c7/0x7c0 [ 34.894053] do_vmi_munmap+0x1f1/0x2b0 [ 34.894557] mmap_region+0x1f9/0x2660 [ 34.895050] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.895589] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.896337] ? __pfx_lock_acquire+0x10/0x10 [ 34.896891] ? __pfx_mmap_region+0x10/0x10 [ 34.897448] ? security_mmap_addr+0x7d/0xa0 [ 34.897995] ? get_unmapped_area+0x1f5/0x3f0 [ 34.898588] do_mmap+0x854/0xf00 [ 34.899044] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.899551] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.900137] ksys_mmap_pgoff+0x3af/0x500 [ 34.900651] do_syscall_64+0x3f/0x90 [ 34.901141] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.901817] RIP: 0033:0x7f728ba50d82 [ 34.902299] 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 [ 34.904473] RSP: 002b:00007fff89fe4178 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.905393] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f728ba50d82 [ 34.906264] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f728ae8a000 [ 34.907125] RBP: 00007f728ae8a000 R08: 0000000000000009 R09: 0000000000001000 [ 34.907980] R10: 0000000000000812 R11: 0000000000000206 R12: 000055effedc4ec0 [ 34.908846] R13: 00007fff89fe4190 R14: 00007fff89fe41c0 R15: 00007fff89fe4520 [ 34.909707] [ 34.910010] [ 34.910260] Allocated by task 214: [ 34.910702] kasan_save_stack+0x22/0x50 [ 34.911219] kasan_set_track+0x25/0x30 [ 34.911730] __kasan_slab_alloc+0x59/0x70 [ 34.912269] kmem_cache_alloc+0x16b/0x370 [ 34.912798] vm_area_dup+0x20/0x160 [ 34.913278] __split_vma+0x170/0x950 [ 34.913758] split_vma+0xc6/0x110 [ 34.914245] mprotect_fixup+0x8d2/0xb30 [ 34.914762] do_mprotect_pkey+0x87e/0xd40 [ 34.915304] __x64_sys_mprotect+0x78/0xc0 [ 34.915825] do_syscall_64+0x3f/0x90 [ 34.916323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.916961] [ 34.917176] Freed by task 19: [ 34.917577] kasan_save_stack+0x22/0x50 [ 34.918100] kasan_set_track+0x25/0x30 [ 34.918599] kasan_save_free_info+0x2b/0x50 [ 34.919136] __kasan_slab_free+0x10a/0x190 [ 34.919684] kmem_cache_free+0x10d/0x4d0 [ 34.920191] rcu_core+0x8c8/0x2860 [ 34.920651] __do_softirq+0x1b7/0x7d4 [ 34.921126] [ 34.921340] Last potentially related work creation: [ 34.921940] kasan_save_stack+0x22/0x50 [ 34.922467] __kasan_record_aux_stack+0x8e/0xa0 [ 34.923050] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.923711] remove_vma+0x139/0x170 [ 34.924177] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.924733] do_vmi_munmap+0x1f1/0x2b0 [ 34.925239] __vm_munmap+0x138/0x3a0 [ 34.925717] __x64_sys_munmap+0x59/0x80 [ 34.926241] do_syscall_64+0x3f/0x90 [ 34.926737] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.927383] [ 34.927602] The buggy address belongs to the object at ffff88800c650e80 [ 34.927602] which belongs to the cache vm_area_struct of size 168 [ 34.929091] The buggy address is located 88 bytes inside of [ 34.929091] freed 168-byte region [ffff88800c650e80, ffff88800c650f28) [ 34.930556] [ 34.930784] The buggy address belongs to the physical page: [ 34.931455] page:000000001542455e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc650 [ 34.932560] memcg:ffff88800e616e01 [ 34.932986] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.933633] page_type: 0xffffffff() [ 34.934110] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.935040] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e616e01 [ 34.935970] page dumped because: kasan: bad access detected [ 34.936642] [ 34.936860] Memory state around the buggy address: [ 34.937460] ffff88800c650d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.938345] ffff88800c650e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 34.939220] >ffff88800c650e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.940086] ^ [ 34.940817] ffff88800c650f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 34.941682] ffff88800c650f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.942556] ================================================================== [ 34.943876] Disabling lock debugging due to kernel taint [ 37.239121] BUG: Bad rss-counter state mm:00000000c8f52711 type:MM_FILEPAGES val:33 [ 37.240774] BUG: Bad rss-counter state mm:00000000c8f52711 type:MM_ANONPAGES val:22 [ 37.789345] BUG: Bad rss-counter state mm:000000003e473353 type:MM_FILEPAGES val:33 [ 37.790435] BUG: Bad rss-counter state mm:000000003e473353 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5089' (ECDSA) to the list of known hosts. 2023/06/19 19:08:00 fuzzer started 2023/06/19 19:08:01 dialing manager at localhost:44161 2023/06/19 19:08:01 checking machine... 2023/06/19 19:08:01 checking revisions... [ 38.436512] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:08:01 testing simple program... [ 38.487725] cgroup: Unknown subsys name 'net' [ 38.550170] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:07:56 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652a88 RCX=0000000000000000 RDX=ffff888014668000 RSI=ffffffff814c84dd RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888014667358 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652a88 R15=ffff888019e655f0 RIP=ffffffff8450bdc0 RFL=00000293 [--S-A-C] 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 00007f48cd5c8900 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=00007f48cca2e060 CR3=000000000ef80000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=de7bab5cb8059d2b00000000000ae988 XMM05=77499a61dab470bd0000000000135650 XMM06=566e311825d6d9ad00000000001343f0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110011caf2a RSI=ffffffff84531da7 RDI=ffff888008e57950 RBP=ffff888008e579e8 RSP=ffff888008e57928 R8 =0000000000000001 R9 =ffff888008e57990 R10=0000000000038001 R11=000000000000fdc6 R12=ffff888008e57a18 R13=0000000000000000 R14=ffff888008e2d1c0 R15=ffff888008e57950 RIP=ffffffff811305f0 RFL=00000212 [----A--] 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 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=00007fb5305de50c CR3=0000000019e08000 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=6720646572637465733a4d41503d706f 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