syzkaller login: [ 24.043958] BUG: Bad rss-counter state mm:000000009aa60647 type:MM_FILEPAGES val:33 [ 24.045253] BUG: Bad rss-counter state mm:000000009aa60647 type:MM_ANONPAGES val:22 [ 24.084964] ================================================================== [ 24.085693] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.086422] Read of size 8 at addr ffff88800e720b38 by task sshd/220 [ 24.087018] [ 24.087185] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.087844] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.088607] Call Trace: [ 24.088854] [ 24.089227] dump_stack_lvl+0x91/0xf0 [ 24.089620] print_report+0xcc/0x620 [ 24.089996] ? __virt_addr_valid+0x102/0x340 [ 24.090426] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.090902] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.091401] kasan_report+0xbe/0xf0 [ 24.091771] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.092253] vma_interval_tree_remove+0xc75/0xec0 [ 24.092717] vma_prepare+0xc54/0x11a0 [ 24.093107] __split_vma+0x5af/0x950 [ 24.093469] ? __pfx___split_vma+0x10/0x10 [ 24.093883] ? find_held_lock+0x2c/0x110 [ 24.094289] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.094726] ? lock_is_held_type+0x9f/0x120 [ 24.095146] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.095623] ? mtree_range_walk+0x632/0x900 [ 24.096052] ? mas_walk+0x5c7/0x7c0 [ 24.096427] do_vmi_munmap+0x1f1/0x2b0 [ 24.096815] mmap_region+0x1f9/0x2660 [ 24.097193] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.097592] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.098164] ? __pfx_lock_acquire+0x10/0x10 [ 24.098581] ? __pfx_mmap_region+0x10/0x10 [ 24.098991] ? security_mmap_addr+0x7d/0xa0 [ 24.099407] ? get_unmapped_area+0x1f5/0x3f0 [ 24.099836] do_mmap+0x854/0xf00 [ 24.100175] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.100562] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.100996] ksys_mmap_pgoff+0x3af/0x500 [ 24.101391] do_syscall_64+0x3f/0x90 [ 24.101755] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.102254] RIP: 0033:0x7fbccb9aad82 [ 24.102608] 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 [ 24.104276] RSP: 002b:00007ffda48d27f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.104981] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbccb9aad82 [ 24.105653] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbccade4000 [ 24.106314] RBP: 00007fbccade4000 R08: 0000000000000009 R09: 0000000000001000 [ 24.106978] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563ac4d33980 [ 24.107638] R13: 00007ffda48d2810 R14: 00007ffda48d2840 R15: 00007ffda48d2ba0 [ 24.108289] [ 24.108513] [ 24.108677] Allocated by task 213: [ 24.109024] kasan_save_stack+0x22/0x50 [ 24.109413] kasan_set_track+0x25/0x30 [ 24.109795] __kasan_slab_alloc+0x59/0x70 [ 24.110196] kmem_cache_alloc+0x16b/0x370 [ 24.110595] vm_area_dup+0x20/0x160 [ 24.110942] __split_vma+0x170/0x950 [ 24.111301] split_vma+0xc6/0x110 [ 24.111638] mprotect_fixup+0x8d2/0xb30 [ 24.112026] do_mprotect_pkey+0x87e/0xd40 [ 24.112429] __x64_sys_mprotect+0x78/0xc0 [ 24.112837] do_syscall_64+0x3f/0x90 [ 24.113221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.113719] [ 24.113883] Freed by task 213: [ 24.114201] kasan_save_stack+0x22/0x50 [ 24.114620] kasan_set_track+0x25/0x30 [ 24.115001] kasan_save_free_info+0x2b/0x50 [ 24.115417] __kasan_slab_free+0x10a/0x190 [ 24.115832] kmem_cache_free+0x10d/0x4d0 [ 24.116223] rcu_core+0x8c8/0x2860 [ 24.116572] __do_softirq+0x1b7/0x7d4 [ 24.116945] [ 24.117121] Last potentially related work creation: [ 24.117581] kasan_save_stack+0x22/0x50 [ 24.117973] __kasan_record_aux_stack+0x8e/0xa0 [ 24.118417] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.118914] remove_vma+0x139/0x170 [ 24.119263] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.119699] do_vmi_munmap+0x1f1/0x2b0 [ 24.120075] __vm_munmap+0x138/0x3a0 [ 24.120438] __x64_sys_munmap+0x59/0x80 [ 24.120826] do_syscall_64+0x3f/0x90 [ 24.121204] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.121707] [ 24.121874] Second to last potentially related work creation: [ 24.122411] kasan_save_stack+0x22/0x50 [ 24.122808] __kasan_record_aux_stack+0x8e/0xa0 [ 24.123256] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.123753] remove_vma+0x139/0x170 [ 24.124102] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.124540] do_vmi_munmap+0x1f1/0x2b0 [ 24.124917] mmap_region+0x1f9/0x2660 [ 24.125301] do_mmap+0x854/0xf00 [ 24.125638] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.126020] ksys_mmap_pgoff+0x3af/0x500 [ 24.126411] do_syscall_64+0x3f/0x90 [ 24.126782] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.127288] [ 24.127455] The buggy address belongs to the object at ffff88800e720ae0 [ 24.127455] which belongs to the cache vm_area_struct of size 168 [ 24.128603] The buggy address is located 88 bytes inside of [ 24.128603] freed 168-byte region [ffff88800e720ae0, ffff88800e720b88) [ 24.129709] [ 24.129876] The buggy address belongs to the physical page: [ 24.130436] page:00000000f6a24a5f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe720 [ 24.131282] memcg:ffff88800e5a0801 [ 24.131610] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.132112] page_type: 0xffffffff() [ 24.132462] raw: 0100000000000200 ffff8880087a0c80 ffffea0000385fc0 dead000000000004 [ 24.133199] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5a0801 [ 24.133910] page dumped because: kasan: bad access detected [ 24.134421] [ 24.134588] Memory state around the buggy address: [ 24.135046] ffff88800e720a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.135713] ffff88800e720a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 24.136385] >ffff88800e720b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.137056] ^ [ 24.137526] ffff88800e720b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 24.138193] ffff88800e720c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 24.138857] ================================================================== [ 24.139597] Disabling lock debugging due to kernel taint [ 26.029233] BUG: Bad rss-counter state mm:000000008e63244f type:MM_FILEPAGES val:33 [ 26.030039] BUG: Bad rss-counter state mm:000000008e63244f type:MM_ANONPAGES val:22 [ 26.496078] BUG: Bad rss-counter state mm:00000000332d3318 type:MM_FILEPAGES val:33 [ 26.497067] BUG: Bad rss-counter state mm:00000000332d3318 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35787' (ECDSA) to the list of known hosts. 2023/06/20 19:56:01 fuzzer started 2023/06/20 19:56:02 dialing manager at localhost:36067 2023/06/20 19:56:02 checking machine... 2023/06/20 19:56:02 checking revisions... [ 27.238936] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:56:02 testing simple program... [ 27.296038] cgroup: Unknown subsys name 'net' [ 27.346653] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:56:01 Registers: info registers vcpu 0 RAX=0000000080010004 RBX=ffff888009098000 RCX=0000000000000000 RDX=000000000001c062 RSI=ffffffff8219168b RDI=0000000000000007 RBP=ffff888009098180 RSP=ffff88806ce09de8 R8 =0000000000000007 R9 =0000000000010000 R10=000000000001c062 R11=ffff88806ce09ff8 R12=000000000001c062 R13=ffff88800909c4c8 R14=0000000000000000 R15=ffff888009098008 RIP=ffffffff8219168f 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 00007fb1c1393900 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=00007fb1c194b0b0 CR3=000000001bc2c000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000050 RBX=ffff888009098000 RCX=0000000000000000 RDX=00000000000101f7 RSI=ffffffff8219168b RDI=0000000000000007 RBP=00000000000003e7 RSP=ffff888016c0f7d8 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f7 R11=0000000000000128 R12=00000000000101f7 R13=ffffed1001213001 R14=ffffffff85a23960 R15=dffffc0000000000 RIP=ffffffff8219168f RFL=00000093 [--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 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=00007f9fba3f2630 CR3=000000000e804000 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=36353a3931203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363830 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000