syzkaller login: [ 34.933764] BUG: Bad rss-counter state mm:00000000a4470085 type:MM_FILEPAGES val:33 [ 34.934811] BUG: Bad rss-counter state mm:00000000a4470085 type:MM_ANONPAGES val:22 [ 35.116577] ================================================================== [ 35.117774] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.118791] Read of size 8 at addr ffff88800d1134e0 by task sshd/222 [ 35.119610] [ 35.119842] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.120744] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.121767] Call Trace: [ 35.122101] [ 35.122398] dump_stack_lvl+0x91/0xf0 [ 35.122911] print_report+0xcc/0x620 [ 35.123417] ? __virt_addr_valid+0x102/0x340 [ 35.123996] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.124642] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.125288] kasan_report+0xbe/0xf0 [ 35.125815] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.126468] vma_interval_tree_remove+0xc75/0xec0 [ 35.127100] vma_prepare+0xc54/0x11a0 [ 35.127602] __split_vma+0x5af/0x950 [ 35.128099] ? __pfx___split_vma+0x10/0x10 [ 35.128652] ? find_held_lock+0x2c/0x110 [ 35.129201] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.129807] ? lock_is_held_type+0x9f/0x120 [ 35.130373] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.131011] ? mtree_range_walk+0x632/0x900 [ 35.131589] ? mas_walk+0x5c7/0x7c0 [ 35.132087] do_vmi_munmap+0x1f1/0x2b0 [ 35.132604] mmap_region+0x1f9/0x2660 [ 35.133112] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.133669] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.134421] ? __pfx_lock_acquire+0x10/0x10 [ 35.134982] ? __pfx_mmap_region+0x10/0x10 [ 35.135543] ? security_mmap_addr+0x7d/0xa0 [ 35.136102] ? get_unmapped_area+0x1f5/0x3f0 [ 35.136680] do_mmap+0x854/0xf00 [ 35.137141] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.137670] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.138264] ksys_mmap_pgoff+0x3af/0x500 [ 35.138800] do_syscall_64+0x3f/0x90 [ 35.139303] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.139988] RIP: 0033:0x7f325ac1bd82 [ 35.140471] 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 [ 35.142852] RSP: 002b:00007ffdc3038608 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.143908] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f325ac1bd82 [ 35.144897] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f325a055000 [ 35.145909] RBP: 00007f325a055000 R08: 0000000000000009 R09: 0000000000001000 [ 35.146892] R10: 0000000000000812 R11: 0000000000000206 R12: 000055636689bd90 [ 35.147885] R13: 00007ffdc3038620 R14: 00007ffdc3038650 R15: 00007ffdc30389b0 [ 35.148890] [ 35.149235] [ 35.149489] Allocated by task 215: [ 35.149986] kasan_save_stack+0x22/0x50 [ 35.150539] kasan_set_track+0x25/0x30 [ 35.151056] __kasan_slab_alloc+0x59/0x70 [ 35.151607] kmem_cache_alloc+0x16b/0x370 [ 35.152160] vm_area_dup+0x20/0x160 [ 35.152668] __split_vma+0x170/0x950 [ 35.153197] split_vma+0xc6/0x110 [ 35.153716] mprotect_fixup+0x8d2/0xb30 [ 35.154277] do_mprotect_pkey+0x87e/0xd40 [ 35.154857] __x64_sys_mprotect+0x78/0xc0 [ 35.155442] do_syscall_64+0x3f/0x90 [ 35.155975] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.156695] [ 35.156934] Freed by task 215: [ 35.157373] kasan_save_stack+0x22/0x50 [ 35.157948] kasan_set_track+0x25/0x30 [ 35.158500] kasan_save_free_info+0x2b/0x50 [ 35.159098] __kasan_slab_free+0x10a/0x190 [ 35.159687] kmem_cache_free+0x10d/0x4d0 [ 35.160247] rcu_core+0x8c8/0x2860 [ 35.160727] __do_softirq+0x1b7/0x7d4 [ 35.161235] [ 35.161481] Last potentially related work creation: [ 35.162106] kasan_save_stack+0x22/0x50 [ 35.162646] __kasan_record_aux_stack+0x8e/0xa0 [ 35.163261] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.163951] remove_vma+0x139/0x170 [ 35.164433] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.165026] do_vmi_munmap+0x1f1/0x2b0 [ 35.165551] __vm_munmap+0x138/0x3a0 [ 35.166052] __x64_sys_munmap+0x59/0x80 [ 35.166587] do_syscall_64+0x3f/0x90 [ 35.167107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.167782] [ 35.168012] Second to last potentially related work creation: [ 35.168728] kasan_save_stack+0x22/0x50 [ 35.169279] __kasan_record_aux_stack+0x8e/0xa0 [ 35.169912] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.170609] remove_vma+0x139/0x170 [ 35.171103] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.171710] do_vmi_munmap+0x1f1/0x2b0 [ 35.172240] mmap_region+0x1f9/0x2660 [ 35.172766] do_mmap+0x854/0xf00 [ 35.173238] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.173888] ksys_mmap_pgoff+0x3af/0x500 [ 35.174441] do_syscall_64+0x3f/0x90 [ 35.174949] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.175645] [ 35.175873] The buggy address belongs to the object at ffff88800d113488 [ 35.175873] which belongs to the cache vm_area_struct of size 168 [ 35.177511] The buggy address is located 88 bytes inside of [ 35.177511] freed 168-byte region [ffff88800d113488, ffff88800d113530) [ 35.179048] [ 35.179278] The buggy address belongs to the physical page: [ 35.179985] page:000000007e741869 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd113 [ 35.181175] memcg:ffff888014107b01 [ 35.181647] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.182434] page_type: 0xffffffff() [ 35.182955] raw: 0100000000000200 ffff88800879fc80 ffffea0000259740 dead000000000005 [ 35.184019] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014107b01 [ 35.185074] page dumped because: kasan: bad access detected [ 35.185864] [ 35.186114] Memory state around the buggy address: [ 35.186790] ffff88800d113380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.187782] ffff88800d113400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 35.188774] >ffff88800d113480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.189791] ^ [ 35.190663] ffff88800d113500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 35.191654] ffff88800d113580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.192650] ================================================================== [ 35.193872] Disabling lock debugging due to kernel taint [ 37.239755] BUG: Bad rss-counter state mm:00000000e5c7250e type:MM_FILEPAGES val:33 [ 37.240752] BUG: Bad rss-counter state mm:00000000e5c7250e type:MM_ANONPAGES val:22 [ 37.679214] BUG: Bad rss-counter state mm:000000007545cc44 type:MM_FILEPAGES val:33 [ 37.680618] BUG: Bad rss-counter state mm:000000007545cc44 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52875' (ECDSA) to the list of known hosts. 2023/06/20 03:26:24 fuzzer started 2023/06/20 03:26:25 dialing manager at localhost:44161 2023/06/20 03:26:25 checking machine... 2023/06/20 03:26:25 checking revisions... [ 38.370057] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:26:25 testing simple program... [ 38.425090] cgroup: Unknown subsys name 'net' [ 38.464961] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:26:21 Registers: info registers vcpu 0 RAX=ffffffff8614c039 RBX=0000000000000001 RCX=ffffffff8614c034 RDX=0000000000000000 RSI=1ffffffff0c29807 RDI=ffffffff85e0a6c4 RBP=ffff88801695f9d0 RSP=ffff88801695f908 R8 =ffffffff8614c034 R9 =ffff88801695f9b8 R10=0000000000038001 R11=00000000000244bc R12=ffff88801695f9d8 R13=ffff88801695f9c0 R14=ffff88801695f9b9 R15=ffff88801695f978 RIP=ffffffff81130a5b RFL=00000212 [----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 00007f5db057a900 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=00007fffcd216000 CR3=0000000018348000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fa9128bed70 CR3=000000000e1c4000 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=2034323a36323a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a36323a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000