syzkaller login: [ 29.761276] BUG: Bad rss-counter state mm:00000000b96dc1c7 type:MM_FILEPAGES val:33 [ 29.762552] BUG: Bad rss-counter state mm:00000000b96dc1c7 type:MM_ANONPAGES val:22 [ 29.917571] ================================================================== [ 29.918496] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.919425] Read of size 8 at addr ffff8880193f25c8 by task sshd/219 [ 29.920196] [ 29.920411] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.921360] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.922379] Call Trace: [ 29.922706] [ 29.923022] dump_stack_lvl+0x91/0xf0 [ 29.923513] print_report+0xcc/0x620 [ 29.923996] ? __virt_addr_valid+0x102/0x340 [ 29.924546] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.925162] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.925780] kasan_report+0xbe/0xf0 [ 29.926255] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.926888] vma_interval_tree_remove+0xc75/0xec0 [ 29.927487] vma_prepare+0xc54/0x11a0 [ 29.927970] __split_vma+0x5af/0x950 [ 29.928446] ? __pfx___split_vma+0x10/0x10 [ 29.928979] ? find_held_lock+0x2c/0x110 [ 29.929496] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.930058] ? lock_is_held_type+0x9f/0x120 [ 29.930607] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.931216] ? mtree_range_walk+0x632/0x900 [ 29.931763] ? mas_walk+0x5c7/0x7c0 [ 29.932234] do_vmi_munmap+0x1f1/0x2b0 [ 29.932727] mmap_region+0x1f9/0x2660 [ 29.933207] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.933720] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.934462] ? __pfx_lock_acquire+0x10/0x10 [ 29.934991] ? __pfx_mmap_region+0x10/0x10 [ 29.935519] ? security_mmap_addr+0x7d/0xa0 [ 29.936049] ? get_unmapped_area+0x1f5/0x3f0 [ 29.936597] do_mmap+0x854/0xf00 [ 29.937038] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.937530] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.938086] ksys_mmap_pgoff+0x3af/0x500 [ 29.938609] do_syscall_64+0x3f/0x90 [ 29.939084] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.939733] RIP: 0033:0x7fc7c020bd82 [ 29.940192] 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 [ 29.942320] RSP: 002b:00007ffc2314d9c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.943227] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc7c020bd82 [ 29.944080] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc7bf645000 [ 29.944925] RBP: 00007fc7bf645000 R08: 0000000000000009 R09: 0000000000001000 [ 29.945778] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560b275fbec0 [ 29.946632] R13: 00007ffc2314d9e0 R14: 00007ffc2314da10 R15: 00007ffc2314dd70 [ 29.947489] [ 29.947783] [ 29.948005] Allocated by task 212: [ 29.948434] kasan_save_stack+0x22/0x50 [ 29.948944] kasan_set_track+0x25/0x30 [ 29.949432] __kasan_slab_alloc+0x59/0x70 [ 29.949954] kmem_cache_alloc+0x16b/0x370 [ 29.950482] vm_area_dup+0x20/0x160 [ 29.950935] __split_vma+0x170/0x950 [ 29.951402] split_vma+0xc6/0x110 [ 29.951840] mprotect_fixup+0x8d2/0xb30 [ 29.952340] do_mprotect_pkey+0x87e/0xd40 [ 29.952860] __x64_sys_mprotect+0x78/0xc0 [ 29.953377] do_syscall_64+0x3f/0x90 [ 29.953850] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.954500] [ 29.954717] Freed by task 212: [ 29.955109] kasan_save_stack+0x22/0x50 [ 29.955611] kasan_set_track+0x25/0x30 [ 29.956108] kasan_save_free_info+0x2b/0x50 [ 29.956640] __kasan_slab_free+0x10a/0x190 [ 29.957172] kmem_cache_free+0x10d/0x4d0 [ 29.957681] rcu_core+0x8c8/0x2860 [ 29.958125] __do_softirq+0x1b7/0x7d4 [ 29.958603] [ 29.958818] Last potentially related work creation: [ 29.959406] kasan_save_stack+0x22/0x50 [ 29.959906] __kasan_record_aux_stack+0x8e/0xa0 [ 29.960479] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.961120] remove_vma+0x139/0x170 [ 29.961571] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.962129] do_vmi_munmap+0x1f1/0x2b0 [ 29.962636] __vm_munmap+0x138/0x3a0 [ 29.963103] __x64_sys_munmap+0x59/0x80 [ 29.963599] do_syscall_64+0x3f/0x90 [ 29.964070] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.964718] [ 29.964933] The buggy address belongs to the object at ffff8880193f2570 [ 29.964933] which belongs to the cache vm_area_struct of size 168 [ 29.966404] The buggy address is located 88 bytes inside of [ 29.966404] freed 168-byte region [ffff8880193f2570, ffff8880193f2618) [ 29.967829] [ 29.968047] The buggy address belongs to the physical page: [ 29.968701] page:00000000c28c2401 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x193f2 [ 29.969791] memcg:ffff8880165a4c01 [ 29.970218] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.970896] page_type: 0xffffffff() [ 29.971344] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 29.972278] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880165a4c01 [ 29.973184] page dumped because: kasan: bad access detected [ 29.973857] [ 29.974074] Memory state around the buggy address: [ 29.974658] ffff8880193f2480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.975514] ffff8880193f2500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 29.976378] >ffff8880193f2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.977224] ^ [ 29.977885] ffff8880193f2600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 29.978757] ffff8880193f2680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.979604] ================================================================== [ 29.980657] Disabling lock debugging due to kernel taint [ 31.941175] BUG: Bad rss-counter state mm:0000000098417f70 type:MM_FILEPAGES val:33 [ 31.942373] BUG: Bad rss-counter state mm:0000000098417f70 type:MM_ANONPAGES val:22 [ 32.335132] BUG: Bad rss-counter state mm:00000000eca4751a type:MM_FILEPAGES val:33 [ 32.336296] BUG: Bad rss-counter state mm:00000000eca4751a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52637' (ECDSA) to the list of known hosts. 2023/06/19 17:15:56 fuzzer started 2023/06/19 17:15:56 dialing manager at localhost:44161 2023/06/19 17:15:56 checking machine... 2023/06/19 17:15:56 checking revisions... [ 33.108880] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:15:57 testing simple program... [ 33.167326] cgroup: Unknown subsys name 'net' [ 33.219972] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:15:55 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff856529e0 RCX=ffffffff814c8421 RDX=ffff8880167c3680 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880146cf568 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007f5f0744ec64 R13=0000000000000000 R14=ffff8880167c3680 R15=0000000000092cc0 RIP=ffffffff814c0245 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 00007f5f06b95900 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=00007ff2b16d2650 CR3=000000000c99a000 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=753e8c17f5b0c71900000000000ae988 XMM05=eb7bbef572f165e50000000000135b28 XMM06=dfcdbad4f1609c370000000000134988 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff844b2256 RDX=ffff88800db39b40 RSI=0000000000000000 RDI=0000000000000001 RBP=dffffc0000000000 RSP=ffff88800951fd68 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000100 R13=ffff88800951fe70 R14=ffffffffffffffff R15=1ffff110012a3faf RIP=ffffffff814c07e0 RFL=00000202 [-------] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff2b111d900 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=00007ff2b1c71044 CR3=000000000c920000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=0a7e5553fd244fca463a4cabcc5bdd51 XMM05=00000000000000000000000000000000 XMM06=0a73555363244f3d463a4c20685b733d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000