syzkaller login: [ 72.452781] BUG: Bad rss-counter state mm:00000000f97e2a48 type:MM_FILEPAGES val:33 [ 72.454560] BUG: Bad rss-counter state mm:00000000f97e2a48 type:MM_ANONPAGES val:22 [ 72.621632] ================================================================== [ 72.622569] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 72.623546] Read of size 8 at addr ffff888019d90968 by task sshd/226 [ 72.624347] [ 72.624690] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 72.625579] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 72.626583] Call Trace: [ 72.626937] [ 72.627239] dump_stack_lvl+0x91/0xf0 [ 72.627746] print_report+0xcc/0x620 [ 72.628252] ? __virt_addr_valid+0x102/0x340 [ 72.628837] ? vma_interval_tree_remove+0xc75/0xec0 [ 72.629477] ? vma_interval_tree_remove+0xc75/0xec0 [ 72.630118] kasan_report+0xbe/0xf0 [ 72.630619] ? vma_interval_tree_remove+0xc75/0xec0 [ 72.631267] vma_interval_tree_remove+0xc75/0xec0 [ 72.631900] vma_prepare+0xc54/0x11a0 [ 72.632397] __split_vma+0x5af/0x950 [ 72.632896] ? __pfx___split_vma+0x10/0x10 [ 72.633463] ? find_held_lock+0x2c/0x110 [ 72.634022] do_vmi_align_munmap+0x2ba/0x11f0 [ 72.634628] ? lock_is_held_type+0x9f/0x120 [ 72.635203] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 72.635855] ? mtree_range_walk+0x632/0x900 [ 72.636442] ? mas_walk+0x5c7/0x7c0 [ 72.636963] do_vmi_munmap+0x1f1/0x2b0 [ 72.637489] mmap_region+0x1f9/0x2660 [ 72.638004] ? vm_mmap_pgoff+0x15c/0x3a0 [ 72.638548] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 72.639308] ? __pfx_lock_acquire+0x10/0x10 [ 72.639875] ? __pfx_mmap_region+0x10/0x10 [ 72.640440] ? security_mmap_addr+0x7d/0xa0 [ 72.641011] ? get_unmapped_area+0x1f5/0x3f0 [ 72.641592] do_mmap+0x854/0xf00 [ 72.642059] vm_mmap_pgoff+0x1a6/0x3a0 [ 72.642587] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 72.643189] ksys_mmap_pgoff+0x3af/0x500 [ 72.643725] do_syscall_64+0x3f/0x90 [ 72.644232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.644928] RIP: 0033:0x7f5ce551ed82 [ 72.645416] 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 [ 72.647665] RSP: 002b:00007fff33a06b78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 72.648632] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5ce551ed82 [ 72.649540] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5ce4958000 [ 72.650450] RBP: 00007f5ce4958000 R08: 0000000000000009 R09: 0000000000001000 [ 72.651359] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559e3e4aef70 [ 72.652263] R13: 00007fff33a06b90 R14: 00007fff33a06bc0 R15: 00007fff33a06f20 [ 72.653206] [ 72.653516] [ 72.653745] Allocated by task 219: [ 72.654205] kasan_save_stack+0x22/0x50 [ 72.654748] kasan_set_track+0x25/0x30 [ 72.655273] __kasan_slab_alloc+0x59/0x70 [ 72.655835] kmem_cache_alloc+0x16b/0x370 [ 72.656388] vm_area_dup+0x20/0x160 [ 72.656881] __split_vma+0x170/0x950 [ 72.657383] split_vma+0xc6/0x110 [ 72.657854] mprotect_fixup+0x8d2/0xb30 [ 72.658390] do_mprotect_pkey+0x87e/0xd40 [ 72.658949] __x64_sys_mprotect+0x78/0xc0 [ 72.659505] do_syscall_64+0x3f/0x90 [ 72.660013] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.660706] [ 72.660940] Freed by task 219: [ 72.661362] kasan_save_stack+0x22/0x50 [ 72.661900] kasan_set_track+0x25/0x30 [ 72.662423] kasan_save_free_info+0x2b/0x50 [ 72.662993] __kasan_slab_free+0x10a/0x190 [ 72.663566] kmem_cache_free+0x10d/0x4d0 [ 72.664114] rcu_core+0x8c8/0x2860 [ 72.664584] __do_softirq+0x1b7/0x7d4 [ 72.665118] [ 72.665347] Last potentially related work creation: [ 72.665972] kasan_save_stack+0x22/0x50 [ 72.666510] __kasan_record_aux_stack+0x8e/0xa0 [ 72.667122] __call_rcu_common.constprop.0+0x6a/0xb90 [ 72.667805] remove_vma+0x139/0x170 [ 72.668288] do_vmi_align_munmap+0xd4a/0x11f0 [ 72.668885] do_vmi_munmap+0x1f1/0x2b0 [ 72.669401] __vm_munmap+0x138/0x3a0 [ 72.669899] __x64_sys_munmap+0x59/0x80 [ 72.670424] do_syscall_64+0x3f/0x90 [ 72.670936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.671617] [ 72.671847] The buggy address belongs to the object at ffff888019d90910 [ 72.671847] which belongs to the cache vm_area_struct of size 168 [ 72.673422] The buggy address is located 88 bytes inside of [ 72.673422] freed 168-byte region [ffff888019d90910, ffff888019d909b8) [ 72.674920] [ 72.675152] The buggy address belongs to the physical page: [ 72.675858] page:00000000e01db27e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d90 [ 72.677037] memcg:ffff888018c2ec01 [ 72.677491] flags: 0x100000000000200(slab|node=0|zone=1) [ 72.678176] page_type: 0xffffffff() [ 72.678658] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 72.679626] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018c2ec01 [ 72.680586] page dumped because: kasan: bad access detected [ 72.681295] [ 72.681531] Memory state around the buggy address: [ 72.682153] ffff888019d90800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 72.683201] ffff888019d90880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 72.684154] >ffff888019d90900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 72.685117] ^ [ 72.685984] ffff888019d90980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 72.686931] ffff888019d90a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 72.687882] ================================================================== [ 72.688973] Disabling lock debugging due to kernel taint [ 74.752337] BUG: Bad rss-counter state mm:0000000078728be4 type:MM_FILEPAGES val:33 [ 74.753550] BUG: Bad rss-counter state mm:0000000078728be4 type:MM_ANONPAGES val:22 [ 75.231174] BUG: Bad rss-counter state mm:00000000ba4ae922 type:MM_FILEPAGES val:33 [ 75.232206] BUG: Bad rss-counter state mm:00000000ba4ae922 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13454' (ECDSA) to the list of known hosts. 2023/06/20 05:05:43 fuzzer started 2023/06/20 05:05:43 dialing manager at localhost:44161 2023/06/20 05:05:43 checking machine... 2023/06/20 05:05:43 checking revisions... [ 75.898907] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:05:43 testing simple program... [ 75.951641] cgroup: Unknown subsys name 'net' [ 76.005016] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:05:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff86137cac RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09aa8 RSP=ffff88806ce099e0 R8 =ffffffff86137cb0 R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000020ed0 R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=0000000000000005 R15=ffff88806ce09a50 RIP=ffffffff81130b3f RFL=00000246 [---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 00007fb64efb5900 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=00007fb64e3f6ad0 CR3=00000000145ea000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=9676c4c6742794d500000000000ae988 XMM05=e1c23fd428e3b8190000000000135300 XMM06=16bbfc4fa606b6250000000000134410 XMM07=fb795ef6d65770560000000000124280 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff8880165f8001 RBX=ffff8880165f75a8 RCX=0000000000000001 RDX=ffff8880165f7501 RSI=ffff8880165f7578 RDI=ffff8880165f75b8 RBP=ffff8880165f7578 RSP=ffff8880165f74b0 R8 =0000000000000001 R9 =ffff8880165f75e8 R10=0000000000038001 R11=0000000000006097 R12=0000000000000008 R13=ffff8880165f0000 R14=ffff8880165f7578 R15=ffff8880165f75a8 RIP=ffffffff8113048d RFL=00000283 [--S---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 00007f374c55e700 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=00007fadbb105618 CR3=000000001464c000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3633325b646873732033343a3530 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383632 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000