syzkaller login: [ 30.937001] BUG: Bad rss-counter state mm:00000000f6382b0c type:MM_FILEPAGES val:33 [ 30.937963] BUG: Bad rss-counter state mm:00000000f6382b0c type:MM_ANONPAGES val:22 [ 31.102761] ================================================================== [ 31.103631] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.104514] Read of size 8 at addr ffff88800dcd7310 by task sshd/220 [ 31.105229] [ 31.105434] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.106349] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.107333] Call Trace: [ 31.107639] [ 31.107909] dump_stack_lvl+0x91/0xf0 [ 31.108388] print_report+0xcc/0x620 [ 31.108848] ? __virt_addr_valid+0x102/0x340 [ 31.109368] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.109955] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.110534] kasan_report+0xbe/0xf0 [ 31.110986] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.111582] vma_interval_tree_remove+0xc75/0xec0 [ 31.112146] vma_prepare+0xc54/0x11a0 [ 31.112597] __split_vma+0x5af/0x950 [ 31.113045] ? __pfx___split_vma+0x10/0x10 [ 31.113541] ? find_held_lock+0x2c/0x110 [ 31.114058] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.114645] ? lock_is_held_type+0x9f/0x120 [ 31.115201] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.115805] ? mtree_range_walk+0x632/0x900 [ 31.116351] ? mas_walk+0x5c7/0x7c0 [ 31.116815] do_vmi_munmap+0x1f1/0x2b0 [ 31.117300] mmap_region+0x1f9/0x2660 [ 31.117779] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.118280] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.118982] ? __pfx_lock_acquire+0x10/0x10 [ 31.119533] ? __pfx_mmap_region+0x10/0x10 [ 31.120058] ? security_mmap_addr+0x7d/0xa0 [ 31.120587] ? get_unmapped_area+0x1f5/0x3f0 [ 31.121128] do_mmap+0x854/0xf00 [ 31.121566] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.122048] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.122600] ksys_mmap_pgoff+0x3af/0x500 [ 31.123098] do_syscall_64+0x3f/0x90 [ 31.123584] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.124250] RIP: 0033:0x7fd1f854ed82 [ 31.124722] 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 [ 31.126721] RSP: 002b:00007ffc4698d088 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.127637] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd1f854ed82 [ 31.128496] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd1f7988000 [ 31.129346] RBP: 00007fd1f7988000 R08: 0000000000000009 R09: 0000000000001000 [ 31.130212] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a225150ec0 [ 31.131057] R13: 00007ffc4698d0a0 R14: 00007ffc4698d0d0 R15: 00007ffc4698d430 [ 31.131915] [ 31.132212] [ 31.132424] Allocated by task 213: [ 31.132852] kasan_save_stack+0x22/0x50 [ 31.133359] kasan_set_track+0x25/0x30 [ 31.133848] __kasan_slab_alloc+0x59/0x70 [ 31.134364] kmem_cache_alloc+0x16b/0x370 [ 31.134880] vm_area_dup+0x20/0x160 [ 31.135336] __split_vma+0x170/0x950 [ 31.135803] split_vma+0xc6/0x110 [ 31.136242] mprotect_fixup+0x8d2/0xb30 [ 31.136742] do_mprotect_pkey+0x87e/0xd40 [ 31.137260] __x64_sys_mprotect+0x78/0xc0 [ 31.137782] do_syscall_64+0x3f/0x90 [ 31.138252] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.138895] [ 31.139111] Freed by task 19: [ 31.139507] kasan_save_stack+0x22/0x50 [ 31.140010] kasan_set_track+0x25/0x30 [ 31.140498] kasan_save_free_info+0x2b/0x50 [ 31.141031] __kasan_slab_free+0x10a/0x190 [ 31.141557] kmem_cache_free+0x10d/0x4d0 [ 31.142060] rcu_core+0x8c8/0x2860 [ 31.142499] __do_softirq+0x1b7/0x7d4 [ 31.142972] [ 31.143184] Last potentially related work creation: [ 31.143772] kasan_save_stack+0x22/0x50 [ 31.144279] __kasan_record_aux_stack+0x8e/0xa0 [ 31.144848] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.145487] remove_vma+0x139/0x170 [ 31.145940] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.146489] do_vmi_munmap+0x1f1/0x2b0 [ 31.146976] __vm_munmap+0x138/0x3a0 [ 31.147525] __x64_sys_munmap+0x59/0x80 [ 31.148018] do_syscall_64+0x3f/0x90 [ 31.148493] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.149137] [ 31.149352] The buggy address belongs to the object at ffff88800dcd72b8 [ 31.149352] which belongs to the cache vm_area_struct of size 168 [ 31.150819] The buggy address is located 88 bytes inside of [ 31.150819] freed 168-byte region [ffff88800dcd72b8, ffff88800dcd7360) [ 31.152226] [ 31.152442] The buggy address belongs to the physical page: [ 31.153093] page:00000000689e5bf6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcd7 [ 31.154171] memcg:ffff88800ca49501 [ 31.154593] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.155230] page_type: 0xffffffff() [ 31.155687] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.156606] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca49501 [ 31.157502] page dumped because: kasan: bad access detected [ 31.158160] [ 31.158378] Memory state around the buggy address: [ 31.158958] ffff88800dcd7200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.159831] ffff88800dcd7280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.160685] >ffff88800dcd7300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.161537] ^ [ 31.162004] ffff88800dcd7380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.162860] ffff88800dcd7400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.163708] ================================================================== [ 31.164830] Disabling lock debugging due to kernel taint [ 33.333832] BUG: Bad rss-counter state mm:00000000fc3af31a type:MM_FILEPAGES val:33 [ 33.335037] BUG: Bad rss-counter state mm:00000000fc3af31a type:MM_ANONPAGES val:22 [ 33.844779] BUG: Bad rss-counter state mm:000000005822febe type:MM_FILEPAGES val:33 [ 33.846188] BUG: Bad rss-counter state mm:000000005822febe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40525' (ECDSA) to the list of known hosts. 2023/06/21 06:37:08 fuzzer started 2023/06/21 06:37:08 dialing manager at localhost:36067 2023/06/21 06:37:08 checking machine... 2023/06/21 06:37:08 checking revisions... [ 34.571448] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:37:08 testing simple program... [ 34.632151] cgroup: Unknown subsys name 'net' [ 34.692891] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:37:08 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff86139701 RDX=1ffff110028e1e95 RSI=ffffffff8180ca5a RDI=ffff88801470f4a8 RBP=ffff88801470f540 RSP=ffff88801470f480 R8 =ffffffff86139748 R9 =ffff88801470f4e8 R10=0000000000038001 R11=0000000000020f03 R12=ffff88801470f570 R13=0000000000000000 R14=ffff888014710000 R15=ffff88801470f4a8 RIP=ffffffff811305f0 RFL=00000216 [----AP-] 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 00007fe56aaad900 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=00007fe569eb0010 CR3=000000000d676000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=dbfd6ef227bfa65900000000000ae988 XMM05=f992f64b8b2c2b7d0000000000133468 XMM06=c291bd5c70af25b90000000000132258 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=00007f583982a0b0 CR3=000000000e0c2000 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=2037303a37333a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a37333a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000