syzkaller login: [ 38.659815] BUG: Bad rss-counter state mm:000000000e06f6d7 type:MM_FILEPAGES val:33 [ 38.661281] BUG: Bad rss-counter state mm:000000000e06f6d7 type:MM_ANONPAGES val:22 [ 38.824792] ================================================================== [ 38.825887] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.827010] Read of size 8 at addr ffff8880182006b0 by task sshd/225 [ 38.828005] [ 38.828226] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.829089] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.830101] Call Trace: [ 38.830420] [ 38.830721] dump_stack_lvl+0x91/0xf0 [ 38.831220] print_report+0xcc/0x620 [ 38.831702] ? __virt_addr_valid+0x102/0x340 [ 38.832252] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.832864] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.833481] kasan_report+0xbe/0xf0 [ 38.833964] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.834584] vma_interval_tree_remove+0xc75/0xec0 [ 38.835190] vma_prepare+0xc54/0x11a0 [ 38.835674] __split_vma+0x5af/0x950 [ 38.836147] ? __pfx___split_vma+0x10/0x10 [ 38.836688] ? find_held_lock+0x2c/0x110 [ 38.837214] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.837783] ? lock_is_held_type+0x9f/0x120 [ 38.838322] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.838957] ? mtree_range_walk+0x632/0x900 [ 38.839511] ? mas_walk+0x5c7/0x7c0 [ 38.839991] do_vmi_munmap+0x1f1/0x2b0 [ 38.840485] mmap_region+0x1f9/0x2660 [ 38.840965] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.841475] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.842196] ? __pfx_lock_acquire+0x10/0x10 [ 38.842742] ? __pfx_mmap_region+0x10/0x10 [ 38.843274] ? security_mmap_addr+0x7d/0xa0 [ 38.843806] ? get_unmapped_area+0x1f5/0x3f0 [ 38.844356] do_mmap+0x854/0xf00 [ 38.844795] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.845291] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.845856] ksys_mmap_pgoff+0x3af/0x500 [ 38.846366] do_syscall_64+0x3f/0x90 [ 38.846869] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.847515] RIP: 0033:0x7ff03b0bfd82 [ 38.847977] 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 [ 38.850109] RSP: 002b:00007ffd768003d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.851029] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff03b0bfd82 [ 38.851877] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff03a4f9000 [ 38.852727] RBP: 00007ff03a4f9000 R08: 0000000000000009 R09: 0000000000001000 [ 38.853576] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560485945ec0 [ 38.854422] R13: 00007ffd768003f0 R14: 00007ffd76800420 R15: 00007ffd76800780 [ 38.855286] [ 38.855586] [ 38.855804] Allocated by task 218: [ 38.856230] kasan_save_stack+0x22/0x50 [ 38.856730] kasan_set_track+0x25/0x30 [ 38.857231] __kasan_slab_alloc+0x59/0x70 [ 38.857761] kmem_cache_alloc+0x16b/0x370 [ 38.858280] vm_area_dup+0x20/0x160 [ 38.858751] __split_vma+0x170/0x950 [ 38.859215] split_vma+0xc6/0x110 [ 38.859662] mprotect_fixup+0x8d2/0xb30 [ 38.860166] do_mprotect_pkey+0x87e/0xd40 [ 38.860687] __x64_sys_mprotect+0x78/0xc0 [ 38.861207] do_syscall_64+0x3f/0x90 [ 38.861689] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.862330] [ 38.862543] Freed by task 19: [ 38.862943] kasan_save_stack+0x22/0x50 [ 38.863448] kasan_set_track+0x25/0x30 [ 38.863944] kasan_save_free_info+0x2b/0x50 [ 38.864480] __kasan_slab_free+0x10a/0x190 [ 38.865024] kmem_cache_free+0x10d/0x4d0 [ 38.865539] rcu_core+0x8c8/0x2860 [ 38.865988] __do_softirq+0x1b7/0x7d4 [ 38.866463] [ 38.866683] Last potentially related work creation: [ 38.867292] kasan_save_stack+0x22/0x50 [ 38.867810] __kasan_record_aux_stack+0x8e/0xa0 [ 38.868485] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.869136] remove_vma+0x139/0x170 [ 38.869587] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.870150] do_vmi_munmap+0x1f1/0x2b0 [ 38.870652] __vm_munmap+0x138/0x3a0 [ 38.871134] __x64_sys_munmap+0x59/0x80 [ 38.871632] do_syscall_64+0x3f/0x90 [ 38.872118] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.872769] [ 38.872986] The buggy address belongs to the object at ffff888018200658 [ 38.872986] which belongs to the cache vm_area_struct of size 168 [ 38.874464] The buggy address is located 88 bytes inside of [ 38.874464] freed 168-byte region [ffff888018200658, ffff888018200700) [ 38.875886] [ 38.876104] The buggy address belongs to the physical page: [ 38.876764] page:00000000f7395ef2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18200 [ 38.877855] memcg:ffff88800f04f501 [ 38.878281] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.878950] page_type: 0xffffffff() [ 38.879400] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.880316] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f04f501 [ 38.881211] page dumped because: kasan: bad access detected [ 38.881906] [ 38.882123] Memory state around the buggy address: [ 38.882721] ffff888018200580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.883573] ffff888018200600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.884442] >ffff888018200680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.885310] ^ [ 38.885889] ffff888018200700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.886768] ffff888018200780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.887610] ================================================================== [ 38.888546] Disabling lock debugging due to kernel taint [ 41.162542] BUG: Bad rss-counter state mm:00000000111c0ddd type:MM_FILEPAGES val:33 [ 41.163578] BUG: Bad rss-counter state mm:00000000111c0ddd type:MM_ANONPAGES val:22 [ 41.623088] BUG: Bad rss-counter state mm:000000003c9e99ba type:MM_FILEPAGES val:33 [ 41.624256] BUG: Bad rss-counter state mm:000000003c9e99ba type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43160' (ECDSA) to the list of known hosts. 2023/06/20 22:58:55 fuzzer started 2023/06/20 22:58:55 dialing manager at localhost:36067 2023/06/20 22:58:55 checking machine... 2023/06/20 22:58:55 checking revisions... [ 42.325907] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:58:56 testing simple program... [ 42.368129] cgroup: Unknown subsys name 'net' [ 42.410548] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:58:55 Registers: info registers vcpu 0 RAX=44d400ac00000000 RBX=0000000000000038 RCX=0000000000000000 RDX=ffffed1003923f86 RSI=00007ffc884c0798 RDI=ffff88801c91fc30 RBP=00007ffc884c0798 RSP=ffff88801c91fba8 R8 =0000000000000001 R9 =ffffed1003923f85 R10=ffff88801c91fc2f R11=0000000000000000 R12=0000000000000000 R13=ffff88801c91fbf8 R14=0000000000000000 R15=ffff88801c91fcd8 RIP=ffffffff8217bb2b 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 00007fbbb6f2c900 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=00007ffc884bd000 CR3=0000000016548000 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=00000000000000000000000000000000 XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fc8cb41a250 CR3=000000000d5e8000 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=519f702de747f7bfdd4f2e3aad33bb71 XMM02=ec2efd57dc4c00df000000000011b478 XMM03=b9dafdc5a3b45a44000000000011b548 XMM04=d965d5a3e739c0b800000000000ae988 XMM05=e7a3b7508224713400000000001319f0 XMM06=ae9b264101391a5b0000000000131878 XMM07=e042d86d42eb936e0000000000122160 XMM08=b9dafdc5a3b45a44000000000011b548 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000