syzkaller login: [ 23.740828] BUG: Bad rss-counter state mm:00000000be13ddfb type:MM_FILEPAGES val:33 [ 23.742757] BUG: Bad rss-counter state mm:00000000be13ddfb type:MM_ANONPAGES val:22 [ 23.894024] ================================================================== [ 23.895009] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.895987] Read of size 8 at addr ffff8880182024e0 by task sshd/220 [ 23.896945] [ 23.897181] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.898134] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.899167] Call Trace: [ 23.899511] [ 23.899826] dump_stack_lvl+0x91/0xf0 [ 23.900345] print_report+0xcc/0x620 [ 23.900884] ? __virt_addr_valid+0x102/0x340 [ 23.901467] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.902113] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.902778] kasan_report+0xbe/0xf0 [ 23.903280] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.903942] vma_interval_tree_remove+0xc75/0xec0 [ 23.904595] vma_prepare+0xc54/0x11a0 [ 23.905112] __split_vma+0x5af/0x950 [ 23.905618] ? __pfx___split_vma+0x10/0x10 [ 23.906176] ? find_held_lock+0x2c/0x110 [ 23.906730] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.907338] ? lock_is_held_type+0x9f/0x120 [ 23.907925] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.908583] ? mtree_range_walk+0x632/0x900 [ 23.909179] ? mas_walk+0x5c7/0x7c0 [ 23.909688] do_vmi_munmap+0x1f1/0x2b0 [ 23.910213] mmap_region+0x1f9/0x2660 [ 23.910725] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.911268] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.912035] ? __pfx_lock_acquire+0x10/0x10 [ 23.912614] ? __pfx_mmap_region+0x10/0x10 [ 23.913186] ? security_mmap_addr+0x7d/0xa0 [ 23.913749] ? get_unmapped_area+0x1f5/0x3f0 [ 23.914333] do_mmap+0x854/0xf00 [ 23.914801] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.915332] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.915928] ksys_mmap_pgoff+0x3af/0x500 [ 23.916473] do_syscall_64+0x3f/0x90 [ 23.917002] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.917684] RIP: 0033:0x7fe87227cd82 [ 23.918169] 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 [ 23.920422] RSP: 002b:00007ffd52805da8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.921401] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe87227cd82 [ 23.922322] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe8716b6000 [ 23.923229] RBP: 00007fe8716b6000 R08: 0000000000000009 R09: 0000000000001000 [ 23.924129] R10: 0000000000000812 R11: 0000000000000206 R12: 000055caa78c4b20 [ 23.925042] R13: 00007ffd52805dc0 R14: 00007ffd52805df0 R15: 00007ffd52806150 [ 23.925957] [ 23.926273] [ 23.926499] Allocated by task 213: [ 23.926951] kasan_save_stack+0x22/0x50 [ 23.927482] kasan_set_track+0x25/0x30 [ 23.928009] __kasan_slab_alloc+0x59/0x70 [ 23.928587] kmem_cache_alloc+0x16b/0x370 [ 23.929139] vm_area_dup+0x20/0x160 [ 23.929620] __split_vma+0x170/0x950 [ 23.930110] split_vma+0xc6/0x110 [ 23.930575] mprotect_fixup+0x8d2/0xb30 [ 23.931110] do_mprotect_pkey+0x87e/0xd40 [ 23.931662] __x64_sys_mprotect+0x78/0xc0 [ 23.932221] do_syscall_64+0x3f/0x90 [ 23.932734] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.933414] [ 23.933646] Freed by task 213: [ 23.934064] kasan_save_stack+0x22/0x50 [ 23.934603] kasan_set_track+0x25/0x30 [ 23.935129] kasan_save_free_info+0x2b/0x50 [ 23.935701] __kasan_slab_free+0x10a/0x190 [ 23.936274] kmem_cache_free+0x10d/0x4d0 [ 23.936839] rcu_core+0x8c8/0x2860 [ 23.937316] __do_softirq+0x1b7/0x7d4 [ 23.937831] [ 23.938105] Last potentially related work creation: [ 23.938737] kasan_save_stack+0x22/0x50 [ 23.939273] __kasan_record_aux_stack+0x8e/0xa0 [ 23.939882] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.940575] remove_vma+0x139/0x170 [ 23.941062] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.941660] do_vmi_munmap+0x1f1/0x2b0 [ 23.942181] __vm_munmap+0x138/0x3a0 [ 23.942677] __x64_sys_munmap+0x59/0x80 [ 23.943206] do_syscall_64+0x3f/0x90 [ 23.943713] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.944394] [ 23.944649] The buggy address belongs to the object at ffff888018202488 [ 23.944649] which belongs to the cache vm_area_struct of size 168 [ 23.946230] The buggy address is located 88 bytes inside of [ 23.946230] freed 168-byte region [ffff888018202488, ffff888018202530) [ 23.947744] [ 23.947980] The buggy address belongs to the physical page: [ 23.948720] page:00000000e0fbd30d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18202 [ 23.949897] memcg:ffff888015da1401 [ 23.950356] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.951034] page_type: 0xffffffff() [ 23.951515] raw: 0100000000000200 ffff8880087a0c80 ffffea000038ccc0 0000000000000006 [ 23.952492] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015da1401 [ 23.953478] page dumped because: kasan: bad access detected [ 23.954187] [ 23.954418] Memory state around the buggy address: [ 23.955041] ffff888018202380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 23.955955] ffff888018202400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 23.956881] >ffff888018202480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.957783] ^ [ 23.958586] ffff888018202500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 23.959497] ffff888018202580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.960402] ================================================================== [ 23.961470] Disabling lock debugging due to kernel taint [ 25.869846] BUG: Bad rss-counter state mm:00000000f9fb36de type:MM_FILEPAGES val:33 [ 25.870902] BUG: Bad rss-counter state mm:00000000f9fb36de type:MM_ANONPAGES val:22 [ 26.339975] BUG: Bad rss-counter state mm:00000000f82a3816 type:MM_FILEPAGES val:33 [ 26.341032] BUG: Bad rss-counter state mm:00000000f82a3816 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22941' (ECDSA) to the list of known hosts. 2023/06/21 04:16:29 fuzzer started 2023/06/21 04:16:29 dialing manager at localhost:36067 2023/06/21 04:16:29 checking machine... 2023/06/21 04:16:29 checking revisions... [ 27.037654] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:16:29 testing simple program... [ 27.087681] cgroup: Unknown subsys name 'net' [ 27.135028] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:16:28 Registers: info registers vcpu 0 RAX=1ffff110027a0b43 RBX=ffff888013d059e8 RCX=1ffff1100271163a RDX=dffffc0000000000 RSI=ffff8880182d6500 RDI=ffff888013d05a18 RBP=ffff88801388b1a0 RSP=ffff888015cf7cb8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff8880182d5500 R13=0000000000000000 R14=ffff88800e598c28 R15=ffff88800e598be0 RIP=ffffffff8184767e 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 00007f1789514900 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=00007f36e077d650 CR3=000000000c5a6000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b8aa3870b66847d900000000000ae988 XMM05=52dd1bb4ec92d56e0000000000132600 XMM06=4fda316b135da52b0000000000131080 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffd4fc89f88 CR3=000000000e0a8000 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=36313a3430203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343230 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000