syzkaller login: [ 31.675603] BUG: Bad rss-counter state mm:000000002c3c4c99 type:MM_FILEPAGES val:33 [ 31.677201] BUG: Bad rss-counter state mm:000000002c3c4c99 type:MM_ANONPAGES val:22 [ 31.854258] ================================================================== [ 31.855265] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.856283] Read of size 8 at addr ffff88800b8aa4e0 by task sshd/220 [ 31.857264] [ 31.857498] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.858427] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.859510] Call Trace: [ 31.859855] [ 31.860184] dump_stack_lvl+0x91/0xf0 [ 31.860709] print_report+0xcc/0x620 [ 31.861220] ? __virt_addr_valid+0x102/0x340 [ 31.861801] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.862460] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.863118] kasan_report+0xbe/0xf0 [ 31.863632] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.864439] vma_interval_tree_remove+0xc75/0xec0 [ 31.865427] vma_prepare+0xc54/0x11a0 [ 31.866258] __split_vma+0x5af/0x950 [ 31.867075] ? __pfx___split_vma+0x10/0x10 [ 31.867959] ? find_held_lock+0x2c/0x110 [ 31.868666] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.869280] ? lock_is_held_type+0x9f/0x120 [ 31.869839] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.870459] ? mtree_range_walk+0x632/0x900 [ 31.871037] ? mas_walk+0x5c7/0x7c0 [ 31.871526] do_vmi_munmap+0x1f1/0x2b0 [ 31.872085] mmap_region+0x1f9/0x2660 [ 31.872575] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.873111] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.873845] ? __pfx_lock_acquire+0x10/0x10 [ 31.874380] ? __pfx_mmap_region+0x10/0x10 [ 31.874941] ? security_mmap_addr+0x7d/0xa0 [ 31.875481] ? get_unmapped_area+0x1f5/0x3f0 [ 31.876081] do_mmap+0x854/0xf00 [ 31.876537] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.877070] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.877636] ksys_mmap_pgoff+0x3af/0x500 [ 31.878168] do_syscall_64+0x3f/0x90 [ 31.878647] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.879312] RIP: 0033:0x7f6e9e0ded82 [ 31.879776] 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 [ 31.881997] RSP: 002b:00007ffeb0fa02e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.882934] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6e9e0ded82 [ 31.883803] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6e9d518000 [ 31.884688] RBP: 00007f6e9d518000 R08: 0000000000000009 R09: 0000000000001000 [ 31.885579] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c0de2e2f70 [ 31.886462] R13: 00007ffeb0fa0300 R14: 00007ffeb0fa0330 R15: 00007ffeb0fa0690 [ 31.887348] [ 31.887646] [ 31.887895] Allocated by task 213: [ 31.888363] kasan_save_stack+0x22/0x50 [ 31.888916] kasan_set_track+0x25/0x30 [ 31.889465] __kasan_slab_alloc+0x59/0x70 [ 31.890021] kmem_cache_alloc+0x16b/0x370 [ 31.890550] vm_area_dup+0x20/0x160 [ 31.891039] __split_vma+0x170/0x950 [ 31.891523] split_vma+0xc6/0x110 [ 31.892000] mprotect_fixup+0x8d2/0xb30 [ 31.892510] do_mprotect_pkey+0x87e/0xd40 [ 31.893067] __x64_sys_mprotect+0x78/0xc0 [ 31.893595] do_syscall_64+0x3f/0x90 [ 31.894104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.894753] [ 31.894983] Freed by task 213: [ 31.895378] kasan_save_stack+0x22/0x50 [ 31.895905] kasan_set_track+0x25/0x30 [ 31.896410] kasan_save_free_info+0x2b/0x50 [ 31.896974] __kasan_slab_free+0x10a/0x190 [ 31.897523] kmem_cache_free+0x10d/0x4d0 [ 31.898127] rcu_core+0x8c8/0x2860 [ 31.898590] __do_softirq+0x1b7/0x7d4 [ 31.899087] [ 31.899308] Last potentially related work creation: [ 31.899927] kasan_save_stack+0x22/0x50 [ 31.900466] __kasan_record_aux_stack+0x8e/0xa0 [ 31.901071] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.901725] remove_vma+0x139/0x170 [ 31.902209] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.902777] do_vmi_munmap+0x1f1/0x2b0 [ 31.903298] __vm_munmap+0x138/0x3a0 [ 31.903788] __x64_sys_munmap+0x59/0x80 [ 31.904317] do_syscall_64+0x3f/0x90 [ 31.904807] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.905472] [ 31.905690] The buggy address belongs to the object at ffff88800b8aa488 [ 31.905690] which belongs to the cache vm_area_struct of size 168 [ 31.907242] The buggy address is located 88 bytes inside of [ 31.907242] freed 168-byte region [ffff88800b8aa488, ffff88800b8aa530) [ 31.908695] [ 31.908926] The buggy address belongs to the physical page: [ 31.909599] page:000000009df1a45c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb8aa [ 31.910730] memcg:ffff888016898201 [ 31.911197] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.911883] page_type: 0xffffffff() [ 31.912382] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.913348] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016898201 [ 31.914287] page dumped because: kasan: bad access detected [ 31.914986] [ 31.915215] Memory state around the buggy address: [ 31.915812] ffff88800b8aa380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.916725] ffff88800b8aa400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.917625] >ffff88800b8aa480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.918509] ^ [ 31.919302] ffff88800b8aa500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.920238] ffff88800b8aa580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.921133] ================================================================== [ 31.922081] Disabling lock debugging due to kernel taint [ 34.921580] BUG: Bad rss-counter state mm:00000000505a54c8 type:MM_FILEPAGES val:33 [ 34.922953] BUG: Bad rss-counter state mm:00000000505a54c8 type:MM_ANONPAGES val:22 [ 35.416923] BUG: Bad rss-counter state mm:000000004843508c type:MM_FILEPAGES val:33 [ 35.417922] BUG: Bad rss-counter state mm:000000004843508c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20222' (ECDSA) to the list of known hosts. 2023/06/19 19:50:19 fuzzer started 2023/06/19 19:50:19 dialing manager at localhost:44161 2023/06/19 19:50:19 checking machine... 2023/06/19 19:50:19 checking revisions... [ 36.126855] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:50:19 testing simple program... [ 36.173280] cgroup: Unknown subsys name 'net' [ 36.241957] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:50:18 Registers: info registers vcpu 0 RAX=1ffff110027786ab RBX=ffff888013bc3528 RCX=1ffff110026ed3b6 RDX=dffffc0000000000 RSI=ffff888019728b00 RDI=ffff888013bc3558 RBP=ffff888013769d80 RSP=ffff888019e4fcd8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff8880197285c0 R13=0000000000000000 R14=ffff88800ffc52a8 R15=ffff88800ffc5260 RIP=ffffffff818474fe 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 00007f2262be1900 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=000055ec021da954 CR3=000000000e892000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf09b60 RCX=ffffffff864bb001 RDX=1ffff1100d9e136d RSI=ffffffff8450d49f RDI=ffff88806cf09b68 RBP=000000000000000a RSP=ffff88806cf09a78 R8 =ffffffff864bb032 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff88800de39080 RIP=ffffffff813ad46e 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 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=00007f13f93dbb00 CR3=0000000009b50000 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=30353a3931203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383133 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000