syzkaller login: [ 67.055651] BUG: Bad rss-counter state mm:00000000575cd002 type:MM_FILEPAGES val:33 [ 67.057076] BUG: Bad rss-counter state mm:00000000575cd002 type:MM_ANONPAGES val:22 [ 67.116844] ================================================================== [ 67.117783] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 67.118773] Read of size 8 at addr ffff88800f6a3310 by task sshd/220 [ 67.119590] [ 67.119819] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 67.121075] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 67.122140] Call Trace: [ 67.122485] [ 67.122797] dump_stack_lvl+0x91/0xf0 [ 67.123312] print_report+0xcc/0x620 [ 67.123822] ? __virt_addr_valid+0x102/0x340 [ 67.124412] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.125087] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.125752] kasan_report+0xbe/0xf0 [ 67.126259] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.126931] vma_interval_tree_remove+0xc75/0xec0 [ 67.127577] vma_prepare+0xc54/0x11a0 [ 67.128101] __split_vma+0x5af/0x950 [ 67.128610] ? __pfx___split_vma+0x10/0x10 [ 67.129189] ? find_held_lock+0x2c/0x110 [ 67.129742] do_vmi_align_munmap+0x2ba/0x11f0 [ 67.130355] ? lock_is_held_type+0x9f/0x120 [ 67.130941] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 67.131590] ? mtree_range_walk+0x632/0x900 [ 67.132182] ? mas_walk+0x5c7/0x7c0 [ 67.132684] do_vmi_munmap+0x1f1/0x2b0 [ 67.133232] mmap_region+0x1f9/0x2660 [ 67.133755] ? vm_mmap_pgoff+0x15c/0x3a0 [ 67.134292] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 67.135063] ? __pfx_lock_acquire+0x10/0x10 [ 67.135624] ? __pfx_mmap_region+0x10/0x10 [ 67.136177] ? security_mmap_addr+0x7d/0xa0 [ 67.136726] ? get_unmapped_area+0x1f5/0x3f0 [ 67.137327] do_mmap+0x854/0xf00 [ 67.137789] vm_mmap_pgoff+0x1a6/0x3a0 [ 67.138312] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 67.138897] ksys_mmap_pgoff+0x3af/0x500 [ 67.139431] do_syscall_64+0x3f/0x90 [ 67.139927] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.140613] RIP: 0033:0x7f64f64acd82 [ 67.141111] 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 [ 67.143387] RSP: 002b:00007fff34a2ce98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 67.144343] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f64f64acd82 [ 67.145265] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f64f58e6000 [ 67.146180] RBP: 00007f64f58e6000 R08: 0000000000000009 R09: 0000000000001000 [ 67.147098] R10: 0000000000000812 R11: 0000000000000206 R12: 000055effcb3bec0 [ 67.148008] R13: 00007fff34a2ceb0 R14: 00007fff34a2cee0 R15: 00007fff34a2d240 [ 67.149016] [ 67.149461] [ 67.149790] Allocated by task 213: [ 67.150430] kasan_save_stack+0x22/0x50 [ 67.151225] kasan_set_track+0x25/0x30 [ 67.151988] __kasan_slab_alloc+0x59/0x70 [ 67.152765] kmem_cache_alloc+0x16b/0x370 [ 67.153478] vm_area_dup+0x20/0x160 [ 67.154120] __split_vma+0x170/0x950 [ 67.154760] split_vma+0xc6/0x110 [ 67.155407] mprotect_fixup+0x8d2/0xb30 [ 67.156169] do_mprotect_pkey+0x87e/0xd40 [ 67.156966] __x64_sys_mprotect+0x78/0xc0 [ 67.157741] do_syscall_64+0x3f/0x90 [ 67.158432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.159400] [ 67.159735] Freed by task 213: [ 67.160329] kasan_save_stack+0x22/0x50 [ 67.161203] kasan_set_track+0x25/0x30 [ 67.161974] kasan_save_free_info+0x2b/0x50 [ 67.162590] __kasan_slab_free+0x10a/0x190 [ 67.163208] kmem_cache_free+0x10d/0x4d0 [ 67.163787] rcu_core+0x8c8/0x2860 [ 67.164240] __do_softirq+0x1b7/0x7d4 [ 67.164738] [ 67.164980] Last potentially related work creation: [ 67.165568] kasan_save_stack+0x22/0x50 [ 67.166109] __kasan_record_aux_stack+0x8e/0xa0 [ 67.166709] __call_rcu_common.constprop.0+0x6a/0xb90 [ 67.167364] remove_vma+0x139/0x170 [ 67.167831] do_vmi_align_munmap+0xd4a/0x11f0 [ 67.168406] do_vmi_munmap+0x1f1/0x2b0 [ 67.168922] __vm_munmap+0x138/0x3a0 [ 67.169404] __x64_sys_munmap+0x59/0x80 [ 67.169923] do_syscall_64+0x3f/0x90 [ 67.170409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.171114] [ 67.171334] The buggy address belongs to the object at ffff88800f6a32b8 [ 67.171334] which belongs to the cache vm_area_struct of size 168 [ 67.172886] The buggy address is located 88 bytes inside of [ 67.172886] freed 168-byte region [ffff88800f6a32b8, ffff88800f6a3360) [ 67.174334] [ 67.174559] The buggy address belongs to the physical page: [ 67.175236] page:000000007f9f1bba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf6a3 [ 67.176384] memcg:ffff888015dd9201 [ 67.176836] flags: 0x100000000000200(slab|node=0|zone=1) [ 67.177484] page_type: 0xffffffff() [ 67.177965] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 67.178924] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015dd9201 [ 67.179869] page dumped because: kasan: bad access detected [ 67.180535] [ 67.180791] Memory state around the buggy address: [ 67.181410] ffff88800f6a3200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 67.182289] ffff88800f6a3280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 67.183162] >ffff88800f6a3300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 67.184027] ^ [ 67.184509] ffff88800f6a3380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 67.185398] ffff88800f6a3400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 67.186298] ================================================================== [ 67.187306] Disabling lock debugging due to kernel taint [ 69.320960] BUG: Bad rss-counter state mm:0000000013d9569f type:MM_FILEPAGES val:33 [ 69.322172] BUG: Bad rss-counter state mm:0000000013d9569f type:MM_ANONPAGES val:22 [ 69.852943] BUG: Bad rss-counter state mm:00000000388ea4db type:MM_FILEPAGES val:33 [ 69.854099] BUG: Bad rss-counter state mm:00000000388ea4db type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10137' (ECDSA) to the list of known hosts. 2023/06/20 01:34:29 fuzzer started 2023/06/20 01:34:29 dialing manager at localhost:44161 2023/06/20 01:34:29 checking machine... 2023/06/20 01:34:29 checking revisions... [ 70.465135] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:34:29 testing simple program... [ 70.514971] cgroup: Unknown subsys name 'net' [ 70.584301] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:33:53 Registers: info registers vcpu 0 RAX=ffff888019946780 RBX=ffff88800c63e2c8 RCX=1ffff11001c8d544 RDX=dffffc0000000000 RSI=ffff888019945b80 RDI=ffff88800c63e2f8 RBP=ffff88800e46a9f0 RSP=ffff888017ca7cd8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff888019945640 R13=0000000000000000 R14=ffff88800c4612a8 R15=ffff88800c461260 RIP=ffffffff81847508 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 00007f6fb74a8900 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=00007ffc85ebf000 CR3=000000001a326000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ff70f43fac0 CR3=0000000009724000 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=34333a3130203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363331 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000