syzkaller login: [ 31.469935] BUG: Bad rss-counter state mm:000000004a59e235 type:MM_FILEPAGES val:33 [ 31.471192] BUG: Bad rss-counter state mm:000000004a59e235 type:MM_ANONPAGES val:22 [ 31.510363] ================================================================== [ 31.511452] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.512589] Read of size 8 at addr ffff88800fef7310 by task sshd/219 [ 31.513441] [ 31.513673] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.514580] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.515601] Call Trace: [ 31.515937] [ 31.516235] dump_stack_lvl+0x91/0xf0 [ 31.516752] print_report+0xcc/0x620 [ 31.517280] ? __virt_addr_valid+0x102/0x340 [ 31.517863] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.518512] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.519159] kasan_report+0xbe/0xf0 [ 31.519661] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.520316] vma_interval_tree_remove+0xc75/0xec0 [ 31.520954] vma_prepare+0xc54/0x11a0 [ 31.521468] __split_vma+0x5af/0x950 [ 31.521968] ? __pfx___split_vma+0x10/0x10 [ 31.522527] ? find_held_lock+0x2c/0x110 [ 31.523080] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.523675] ? lock_is_held_type+0x9f/0x120 [ 31.524242] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.524884] ? mtree_range_walk+0x632/0x900 [ 31.525481] ? mas_walk+0x5c7/0x7c0 [ 31.525982] do_vmi_munmap+0x1f1/0x2b0 [ 31.526499] mmap_region+0x1f9/0x2660 [ 31.527009] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.527552] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.528303] ? __pfx_lock_acquire+0x10/0x10 [ 31.528870] ? __pfx_mmap_region+0x10/0x10 [ 31.529433] ? security_mmap_addr+0x7d/0xa0 [ 31.529995] ? get_unmapped_area+0x1f5/0x3f0 [ 31.530575] do_mmap+0x854/0xf00 [ 31.531036] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.531567] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.532160] ksys_mmap_pgoff+0x3af/0x500 [ 31.532698] do_syscall_64+0x3f/0x90 [ 31.533202] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.533901] RIP: 0033:0x7f55d0ce4d82 [ 31.534385] 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 [ 31.536633] RSP: 002b:00007ffdc7f3e5b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.537597] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f55d0ce4d82 [ 31.538494] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f55d011e000 [ 31.539390] RBP: 00007f55d011e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.540283] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561012448ec0 [ 31.541175] R13: 00007ffdc7f3e5d0 R14: 00007ffdc7f3e600 R15: 00007ffdc7f3e960 [ 31.542090] [ 31.542399] [ 31.542626] Allocated by task 212: [ 31.543078] kasan_save_stack+0x22/0x50 [ 31.543610] kasan_set_track+0x25/0x30 [ 31.544130] __kasan_slab_alloc+0x59/0x70 [ 31.544679] kmem_cache_alloc+0x16b/0x370 [ 31.545322] vm_area_dup+0x20/0x160 [ 31.545806] __split_vma+0x170/0x950 [ 31.546299] split_vma+0xc6/0x110 [ 31.546766] mprotect_fixup+0x8d2/0xb30 [ 31.547295] do_mprotect_pkey+0x87e/0xd40 [ 31.547848] __x64_sys_mprotect+0x78/0xc0 [ 31.548396] do_syscall_64+0x3f/0x90 [ 31.548894] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.549578] [ 31.549808] Freed by task 19: [ 31.550210] kasan_save_stack+0x22/0x50 [ 31.550737] kasan_set_track+0x25/0x30 [ 31.551259] kasan_save_free_info+0x2b/0x50 [ 31.551818] __kasan_slab_free+0x10a/0x190 [ 31.552389] kmem_cache_free+0x10d/0x4d0 [ 31.552925] rcu_core+0x8c8/0x2860 [ 31.553416] __do_softirq+0x1b7/0x7d4 [ 31.553927] [ 31.554161] Last potentially related work creation: [ 31.554788] kasan_save_stack+0x22/0x50 [ 31.555318] __kasan_record_aux_stack+0x8e/0xa0 [ 31.555928] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.556625] remove_vma+0x139/0x170 [ 31.557103] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.557710] do_vmi_munmap+0x1f1/0x2b0 [ 31.558239] __vm_munmap+0x138/0x3a0 [ 31.558734] __x64_sys_munmap+0x59/0x80 [ 31.559265] do_syscall_64+0x3f/0x90 [ 31.559773] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.560451] [ 31.560683] The buggy address belongs to the object at ffff88800fef72b8 [ 31.560683] which belongs to the cache vm_area_struct of size 168 [ 31.562261] The buggy address is located 88 bytes inside of [ 31.562261] freed 168-byte region [ffff88800fef72b8, ffff88800fef7360) [ 31.563747] [ 31.563980] The buggy address belongs to the physical page: [ 31.564679] page:0000000040d12779 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfef7 [ 31.565834] memcg:ffff88800df38901 [ 31.566291] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.567026] page_type: 0xffffffff() [ 31.567505] raw: 0100000000000200 ffff88800879fc80 ffffea0000270340 dead000000000005 [ 31.568481] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df38901 [ 31.569446] page dumped because: kasan: bad access detected [ 31.570147] [ 31.570374] Memory state around the buggy address: [ 31.570985] ffff88800fef7200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.571890] ffff88800fef7280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.572803] >ffff88800fef7300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.573719] ^ [ 31.574208] ffff88800fef7380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.575123] ffff88800fef7400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.576033] ================================================================== [ 31.577034] Disabling lock debugging due to kernel taint [ 33.413760] BUG: Bad rss-counter state mm:0000000005d474ae type:MM_FILEPAGES val:33 [ 33.415390] BUG: Bad rss-counter state mm:0000000005d474ae type:MM_ANONPAGES val:22 [ 33.898877] BUG: Bad rss-counter state mm:00000000135ec7d0 type:MM_FILEPAGES val:33 [ 33.899974] BUG: Bad rss-counter state mm:00000000135ec7d0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27972' (ECDSA) to the list of known hosts. 2023/06/20 10:46:20 fuzzer started 2023/06/20 10:46:21 dialing manager at localhost:44161 2023/06/20 10:46:21 checking machine... 2023/06/20 10:46:21 checking revisions... [ 34.650537] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:46:21 testing simple program... [ 34.700453] cgroup: Unknown subsys name 'net' [ 34.758974] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:46:19 Registers: info registers vcpu 0 RAX=ffffffff86088c1f RBX=0000000000000001 RCX=ffffffff86088c1a RDX=0000000000000000 RSI=1ffffffff0c11183 RDI=ffffffff85d88408 RBP=ffff88801cdd72b0 RSP=ffff88801cdd7198 R8 =ffffffff86088c1a R9 =ffff88801cdd7298 R10=0000000000038001 R11=0000000000003c0d R12=ffff88801cdd72b8 R13=ffff88801cdd72a0 R14=ffff88801cdd7299 R15=ffff88801cdd7258 RIP=ffffffff81130a5b RFL=00000213 [----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 00007f52f6c0e900 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=00007ffe6d1c2000 CR3=000000000fd6c000 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=0000000080000001 RBX=ffff88801b8002b0 RCX=0000000000000000 RDX=ffff888009c68000 RSI=ffffffff81656fb9 RDI=0000000000000005 RBP=ffffea000070e580 RSP=ffff888009c77a68 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000128 R12=ffff88801b8004d8 R13=ffff88801b800601 R14=0000000000000001 R15=ffff88801b8004e0 RIP=ffffffff814c0800 RFL=00000046 [---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 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=00007f578b2ed720 CR3=000000000d658000 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=4194b4de631f1792a84d265beba505ba XMM02=ec2efd57dc4c00df000000000011f8d8 XMM03=7ce737e18fb9f73a000000000011f9a8 XMM04=766a4e3272d194c200000000000ae988 XMM05=dfcdbad4f1609c3700000000001331f0 XMM06=806171799158d9670000000000133078 XMM07=e042d86d42eb936e0000000000123870 XMM08=7ce737e18fb9f73a000000000011f9a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000