syzkaller login: [ 61.971368] BUG: Bad rss-counter state mm:00000000a36c5bef type:MM_FILEPAGES val:33 [ 61.972726] BUG: Bad rss-counter state mm:00000000a36c5bef type:MM_ANONPAGES val:22 [ 62.127826] ================================================================== [ 62.128799] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.129743] Read of size 8 at addr ffff8880146c0ed8 by task sshd/221 [ 62.130527] [ 62.130750] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 62.131813] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.132816] Call Trace: [ 62.133137] [ 62.133426] dump_stack_lvl+0x91/0xf0 [ 62.133933] print_report+0xcc/0x620 [ 62.134424] ? __virt_addr_valid+0x102/0x340 [ 62.134987] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.135611] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.136237] kasan_report+0xbe/0xf0 [ 62.136729] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.137343] vma_interval_tree_remove+0xc75/0xec0 [ 62.137940] vma_prepare+0xc54/0x11a0 [ 62.138416] __split_vma+0x5af/0x950 [ 62.138887] ? __pfx___split_vma+0x10/0x10 [ 62.139418] ? find_held_lock+0x2c/0x110 [ 62.139944] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.140515] ? lock_is_held_type+0x9f/0x120 [ 62.141066] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.141668] ? mtree_range_walk+0x632/0x900 [ 62.142215] ? mas_walk+0x5c7/0x7c0 [ 62.142685] do_vmi_munmap+0x1f1/0x2b0 [ 62.143184] mmap_region+0x1f9/0x2660 [ 62.143665] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.144177] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.144902] ? __pfx_lock_acquire+0x10/0x10 [ 62.145441] ? __pfx_mmap_region+0x10/0x10 [ 62.145969] ? security_mmap_addr+0x7d/0xa0 [ 62.146508] ? get_unmapped_area+0x1f5/0x3f0 [ 62.147066] do_mmap+0x854/0xf00 [ 62.147505] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.148010] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.148586] ksys_mmap_pgoff+0x3af/0x500 [ 62.149086] do_syscall_64+0x3f/0x90 [ 62.149563] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.150208] RIP: 0033:0x7fe491ef1d82 [ 62.150666] 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 [ 62.152828] RSP: 002b:00007ffd49859138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.153734] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe491ef1d82 [ 62.154610] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe49132b000 [ 62.155499] RBP: 00007fe49132b000 R08: 0000000000000009 R09: 0000000000001000 [ 62.156397] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e854d93ec0 [ 62.157293] R13: 00007ffd49859150 R14: 00007ffd49859180 R15: 00007ffd498594e0 [ 62.158192] [ 62.158495] [ 62.158718] Allocated by task 214: [ 62.159172] kasan_save_stack+0x22/0x50 [ 62.159695] kasan_set_track+0x25/0x30 [ 62.160217] __kasan_slab_alloc+0x59/0x70 [ 62.160767] kmem_cache_alloc+0x16b/0x370 [ 62.161317] vm_area_dup+0x20/0x160 [ 62.161789] __split_vma+0x170/0x950 [ 62.162279] split_vma+0xc6/0x110 [ 62.162734] mprotect_fixup+0x8d2/0xb30 [ 62.163258] do_mprotect_pkey+0x87e/0xd40 [ 62.163800] __x64_sys_mprotect+0x78/0xc0 [ 62.164370] do_syscall_64+0x3f/0x90 [ 62.164867] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.165525] [ 62.165753] Freed by task 214: [ 62.166160] kasan_save_stack+0x22/0x50 [ 62.166682] kasan_set_track+0x25/0x30 [ 62.167192] kasan_save_free_info+0x2b/0x50 [ 62.167755] __kasan_slab_free+0x10a/0x190 [ 62.168318] kmem_cache_free+0x10d/0x4d0 [ 62.168862] rcu_core+0x8c8/0x2860 [ 62.169334] __do_softirq+0x1b7/0x7d4 [ 62.169834] [ 62.170052] Last potentially related work creation: [ 62.170669] kasan_save_stack+0x22/0x50 [ 62.171189] __kasan_record_aux_stack+0x8e/0xa0 [ 62.171791] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.172473] remove_vma+0x139/0x170 [ 62.173033] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.173625] do_vmi_munmap+0x1f1/0x2b0 [ 62.174135] __vm_munmap+0x138/0x3a0 [ 62.174622] __x64_sys_munmap+0x59/0x80 [ 62.175135] do_syscall_64+0x3f/0x90 [ 62.175631] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.176302] [ 62.176535] The buggy address belongs to the object at ffff8880146c0e80 [ 62.176535] which belongs to the cache vm_area_struct of size 168 [ 62.178066] The buggy address is located 88 bytes inside of [ 62.178066] freed 168-byte region [ffff8880146c0e80, ffff8880146c0f28) [ 62.179544] [ 62.179771] The buggy address belongs to the physical page: [ 62.180481] page:000000006c6fce02 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x146c0 [ 62.181619] memcg:ffff88800e8ce101 [ 62.182058] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.182740] page_type: 0xffffffff() [ 62.183204] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 62.184168] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8ce101 [ 62.185129] page dumped because: kasan: bad access detected [ 62.185819] [ 62.186045] Memory state around the buggy address: [ 62.186652] ffff8880146c0d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 62.187557] ffff8880146c0e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 62.188459] >ffff8880146c0e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.189362] ^ [ 62.190114] ffff8880146c0f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 62.191009] ffff8880146c0f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 62.191889] ================================================================== [ 62.192856] Disabling lock debugging due to kernel taint [ 64.384963] BUG: Bad rss-counter state mm:000000008350558c type:MM_FILEPAGES val:33 [ 64.386105] BUG: Bad rss-counter state mm:000000008350558c type:MM_ANONPAGES val:22 [ 64.784396] BUG: Bad rss-counter state mm:00000000e90a7a24 type:MM_FILEPAGES val:33 [ 64.786261] BUG: Bad rss-counter state mm:00000000e90a7a24 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40296' (ECDSA) to the list of known hosts. 2023/06/19 15:20:55 fuzzer started 2023/06/19 15:20:55 dialing manager at localhost:44161 2023/06/19 15:20:55 checking machine... 2023/06/19 15:20:55 checking revisions... [ 65.510276] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:20:55 testing simple program... [ 65.550617] cgroup: Unknown subsys name 'net' [ 65.586659] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:20:54 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007ffcbb1fae48 CR3=0000000016cea000 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=30323a3531203931206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732034353a3032 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363038 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=ffffffff83642d12 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110028efea8 RSI=ffffffff83642d12 RDI=ffff88801477f5b0 RBP=ffff88801477f580 RSP=ffff88801477f4e0 R8 =0000000000000001 R9 =ffff88801477f528 R10=0000000000038001 R11=000000000008a85c R12=ffff88801477f5b0 R13=0000000000000000 R14=ffff8880146f3680 R15=1ffff110028eff1d RIP=ffffffff813ad424 RFL=00000286 [--S--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 00007fe5eb570900 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=00007fa7a9ab9650 CR3=0000000008dc0000 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=c889b2765b38ecad4e4f74cdfb1a291e XMM02=000000000011d438d59e07bde36eea69 XMM03=000000000011d560ec2efd57dc4c00df XMM04=14782b56c49c681c00000000000ae988 XMM05=054612726b017ce400000000001358b0 XMM06=c291bd5c70af25b900000000001346a0 XMM07=fb795ef6d65770560000000000124e00 XMM08=2c67c8bc2e329bc3000000000011d560 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000