syzkaller login: [ 35.744766] BUG: Bad rss-counter state mm:000000006fcc0da3 type:MM_FILEPAGES val:33 [ 35.746379] BUG: Bad rss-counter state mm:000000006fcc0da3 type:MM_ANONPAGES val:22 [ 35.909188] ================================================================== [ 35.910052] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.910931] Read of size 8 at addr ffff88801800f880 by task sshd/220 [ 35.911829] [ 35.912068] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.912885] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.913821] Call Trace: [ 35.914126] [ 35.914395] dump_stack_lvl+0x91/0xf0 [ 35.914861] print_report+0xcc/0x620 [ 35.915361] ? __virt_addr_valid+0x102/0x340 [ 35.915879] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.916516] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.917099] kasan_report+0xbe/0xf0 [ 35.917555] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.918145] vma_interval_tree_remove+0xc75/0xec0 [ 35.918715] vma_prepare+0xc54/0x11a0 [ 35.919211] __split_vma+0x5af/0x950 [ 35.919668] ? __pfx___split_vma+0x10/0x10 [ 35.920217] ? find_held_lock+0x2c/0x110 [ 35.920737] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.921311] ? lock_is_held_type+0x9f/0x120 [ 35.921848] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.922438] ? mtree_range_walk+0x632/0x900 [ 35.922991] ? mas_walk+0x5c7/0x7c0 [ 35.923489] do_vmi_munmap+0x1f1/0x2b0 [ 35.923969] mmap_region+0x1f9/0x2660 [ 35.924471] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.924971] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.925671] ? __pfx_lock_acquire+0x10/0x10 [ 35.926202] ? __pfx_mmap_region+0x10/0x10 [ 35.926712] ? security_mmap_addr+0x7d/0xa0 [ 35.927276] ? get_unmapped_area+0x1f5/0x3f0 [ 35.927817] do_mmap+0x854/0xf00 [ 35.928282] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.928767] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.929317] ksys_mmap_pgoff+0x3af/0x500 [ 35.929806] do_syscall_64+0x3f/0x90 [ 35.930278] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.930910] RIP: 0033:0x7f5ed5b8cd82 [ 35.931404] 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 [ 35.933465] RSP: 002b:00007ffe77eb0738 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.934338] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5ed5b8cd82 [ 35.935203] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5ed4fc6000 [ 35.936067] RBP: 00007f5ed4fc6000 R08: 0000000000000009 R09: 0000000000001000 [ 35.936902] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d0b146ec0 [ 35.937710] R13: 00007ffe77eb0750 R14: 00007ffe77eb0780 R15: 00007ffe77eb0ae0 [ 35.938544] [ 35.938837] [ 35.939046] Allocated by task 213: [ 35.939512] kasan_save_stack+0x22/0x50 [ 35.940013] kasan_set_track+0x25/0x30 [ 35.940516] __kasan_slab_alloc+0x59/0x70 [ 35.941031] kmem_cache_alloc+0x16b/0x370 [ 35.941536] vm_area_dup+0x20/0x160 [ 35.941991] __split_vma+0x170/0x950 [ 35.942444] split_vma+0xc6/0x110 [ 35.942870] mprotect_fixup+0x8d2/0xb30 [ 35.943401] do_mprotect_pkey+0x87e/0xd40 [ 35.943912] __x64_sys_mprotect+0x78/0xc0 [ 35.944435] do_syscall_64+0x3f/0x90 [ 35.944895] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.945518] [ 35.945727] Freed by task 19: [ 35.946098] kasan_save_stack+0x22/0x50 [ 35.946587] kasan_set_track+0x25/0x30 [ 35.947079] kasan_save_free_info+0x2b/0x50 [ 35.947620] __kasan_slab_free+0x10a/0x190 [ 35.948168] kmem_cache_free+0x10d/0x4d0 [ 35.948669] rcu_core+0x8c8/0x2860 [ 35.949119] __do_softirq+0x1b7/0x7d4 [ 35.949597] [ 35.949817] Last potentially related work creation: [ 35.950386] kasan_save_stack+0x22/0x50 [ 35.950878] __kasan_record_aux_stack+0x8e/0xa0 [ 35.951476] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.952110] remove_vma+0x139/0x170 [ 35.952547] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.953101] do_vmi_munmap+0x1f1/0x2b0 [ 35.953577] __vm_munmap+0x138/0x3a0 [ 35.954042] __x64_sys_munmap+0x59/0x80 [ 35.954519] do_syscall_64+0x3f/0x90 [ 35.954985] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.955658] [ 35.955875] The buggy address belongs to the object at ffff88801800f828 [ 35.955875] which belongs to the cache vm_area_struct of size 168 [ 35.957324] The buggy address is located 88 bytes inside of [ 35.957324] freed 168-byte region [ffff88801800f828, ffff88801800f8d0) [ 35.958677] [ 35.958893] The buggy address belongs to the physical page: [ 35.959592] page:000000003db38af3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1800f [ 35.960680] memcg:ffff8880193ff001 [ 35.961096] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.961727] page_type: 0xffffffff() [ 35.962171] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.963063] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880193ff001 [ 35.963982] page dumped because: kasan: bad access detected [ 35.964654] [ 35.964863] Memory state around the buggy address: [ 35.965425] ffff88801800f780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 35.966265] ffff88801800f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.967085] >ffff88801800f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.967923] ^ [ 35.968326] ffff88801800f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.969155] ffff88801800f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 35.969949] ================================================================== [ 35.970882] Disabling lock debugging due to kernel taint [ 38.759935] BUG: Bad rss-counter state mm:00000000f45b52d7 type:MM_FILEPAGES val:33 [ 38.761120] BUG: Bad rss-counter state mm:00000000f45b52d7 type:MM_ANONPAGES val:22 [ 39.327788] BUG: Bad rss-counter state mm:0000000002f3121b type:MM_FILEPAGES val:33 [ 39.328990] BUG: Bad rss-counter state mm:0000000002f3121b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18165' (ECDSA) to the list of known hosts. 2023/06/20 06:28:53 fuzzer started 2023/06/20 06:28:53 dialing manager at localhost:44161 2023/06/20 06:28:53 checking machine... 2023/06/20 06:28:53 checking revisions... [ 39.974026] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:28:53 testing simple program... [ 40.025844] cgroup: Unknown subsys name 'net' [ 40.068982] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:28:47 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff88800da3f8f0 RSI=ffff88800da3f8b8 RDI=ffff88800da3f2f8 RBP=ffff88800da3f380 RSP=ffff88800da3f2c0 R8 =0000000000000001 R9 =ffff88800da3f328 R10=0000000000038001 R11=0000000000038891 R12=ffff88800da3f348 R13=ffff88800da3f330 R14=ffff88800da3f8b8 R15=ffff88800da3f2e8 RIP=ffffffff81130931 RFL=00000292 [--S-A--] 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 00007fdfdf55b700 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=00007faf5682aff0 CR3=000000000e7c0000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732032353a3832 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343638 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88807ffd7010 RCX=ffffffff811432de RDX=ffff88800f4bd1c0 RSI=0000000000000000 RDI=0000000000000007 RBP=000000000f52a080 RSP=ffff88800b96f9d8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000008 R11=0000000000000000 R12=0000000000000001 R13=0000000000000008 R14=0000000000000002 R15=0000000000000024 RIP=ffffffff814c07e0 RFL=00000202 [-------] 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 00007f3055e6f900 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=00007ffc212da000 CR3=000000001ce20000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000