[ 43.689365] BUG: Bad rss-counter state mm:0000000026af138e type:MM_FILEPAGES val:33 [ 43.691022] BUG: Bad rss-counter state mm:0000000026af138e type:MM_ANONPAGES val:22 [ 43.856727] ================================================================== [ 43.857794] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.858724] Read of size 8 at addr ffff88801bdbeed8 by task sshd/218 [ 43.859609] [ 43.859833] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.860705] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.861708] Call Trace: [ 43.862028] [ 43.862319] dump_stack_lvl+0x91/0xf0 [ 43.862813] print_report+0xcc/0x620 [ 43.863304] ? __virt_addr_valid+0x102/0x340 [ 43.863851] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.864519] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.865139] kasan_report+0xbe/0xf0 [ 43.865621] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.866254] vma_interval_tree_remove+0xc75/0xec0 [ 43.866860] vma_prepare+0xc54/0x11a0 [ 43.867342] __split_vma+0x5af/0x950 [ 43.867819] ? __pfx___split_vma+0x10/0x10 [ 43.868354] ? find_held_lock+0x2c/0x110 [ 43.868892] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.869472] ? lock_is_held_type+0x9f/0x120 [ 43.870011] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.870625] ? mtree_range_walk+0x632/0x900 [ 43.871174] ? mas_walk+0x5c7/0x7c0 [ 43.871649] do_vmi_munmap+0x1f1/0x2b0 [ 43.872138] mmap_region+0x1f9/0x2660 [ 43.872648] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.873159] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.873873] ? __pfx_lock_acquire+0x10/0x10 [ 43.874405] ? __pfx_mmap_region+0x10/0x10 [ 43.874949] ? security_mmap_addr+0x7d/0xa0 [ 43.875486] ? get_unmapped_area+0x1f5/0x3f0 [ 43.876055] do_mmap+0x854/0xf00 [ 43.876532] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.877032] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.877607] ksys_mmap_pgoff+0x3af/0x500 [ 43.878129] do_syscall_64+0x3f/0x90 [ 43.878623] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.879284] RIP: 0033:0x7ffb69a06d82 [ 43.879752] 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 [ 43.881950] RSP: 002b:00007ffee8622b18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.882878] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffb69a06d82 [ 43.883741] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffb68e40000 [ 43.884599] RBP: 00007ffb68e40000 R08: 0000000000000009 R09: 0000000000001000 [ 43.885451] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a15ffb0ec0 [ 43.886308] R13: 00007ffee8622b30 R14: 00007ffee8622b60 R15: 00007ffee8622ec0 [ 43.887177] [ 43.887469] [ 43.887684] Allocated by task 210: [ 43.888116] kasan_save_stack+0x22/0x50 [ 43.888650] kasan_set_track+0x25/0x30 [ 43.889147] __kasan_slab_alloc+0x59/0x70 [ 43.889670] kmem_cache_alloc+0x16b/0x370 [ 43.890185] vm_area_dup+0x20/0x160 [ 43.890643] __split_vma+0x170/0x950 [ 43.891109] split_vma+0xc6/0x110 [ 43.891553] mprotect_fixup+0x8d2/0xb30 [ 43.892056] do_mprotect_pkey+0x87e/0xd40 [ 43.892594] __x64_sys_mprotect+0x78/0xc0 [ 43.893119] do_syscall_64+0x3f/0x90 [ 43.893608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.894259] [ 43.894473] Freed by task 210: [ 43.894873] kasan_save_stack+0x22/0x50 [ 43.895393] kasan_set_track+0x25/0x30 [ 43.895884] kasan_save_free_info+0x2b/0x50 [ 43.896443] __kasan_slab_free+0x10a/0x190 [ 43.896986] kmem_cache_free+0x10d/0x4d0 [ 43.897501] rcu_core+0x8c8/0x2860 [ 43.897956] __do_softirq+0x1b7/0x7d4 [ 43.898446] [ 43.898661] Last potentially related work creation: [ 43.899255] kasan_save_stack+0x22/0x50 [ 43.899777] __kasan_record_aux_stack+0x8e/0xa0 [ 43.900360] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.901039] remove_vma+0x139/0x170 [ 43.901495] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.902057] do_vmi_munmap+0x1f1/0x2b0 [ 43.902550] __vm_munmap+0x138/0x3a0 [ 43.903020] __x64_sys_munmap+0x59/0x80 [ 43.903519] do_syscall_64+0x3f/0x90 [ 43.903989] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.904643] [ 43.904862] The buggy address belongs to the object at ffff88801bdbee80 [ 43.904862] which belongs to the cache vm_area_struct of size 168 [ 43.906346] The buggy address is located 88 bytes inside of [ 43.906346] freed 168-byte region [ffff88801bdbee80, ffff88801bdbef28) [ 43.907748] [ 43.907962] The buggy address belongs to the physical page: [ 43.908635] page:000000001a7163a5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bdbe [ 43.909726] memcg:ffff88801bd50b01 [ 43.910151] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.910805] page_type: 0xffffffff() [ 43.911257] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 43.912171] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bd50b01 [ 43.913099] page dumped because: kasan: bad access detected [ 43.913768] [ 43.913982] Memory state around the buggy address: [ 43.914569] ffff88801bdbed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.915423] ffff88801bdbee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 43.916286] >ffff88801bdbee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.917158] ^ [ 43.917889] ffff88801bdbef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 43.918751] ffff88801bdbef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 43.919607] ================================================================== [ 43.920616] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 45.903212] BUG: Bad rss-counter state mm:00000000b7b76840 type:MM_FILEPAGES val:33 [ 45.904727] BUG: Bad rss-counter state mm:00000000b7b76840 type:MM_ANONPAGES val:22 [ 46.365367] BUG: Bad rss-counter state mm:00000000049fdba9 type:MM_FILEPAGES val:33 [ 46.366537] BUG: Bad rss-counter state mm:00000000049fdba9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32716' (ECDSA) to the list of known hosts. 2023/06/20 07:13:22 fuzzer started 2023/06/20 07:13:23 dialing manager at localhost:44161 2023/06/20 07:13:23 checking machine... 2023/06/20 07:13:23 checking revisions... [ 47.159387] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:13:23 testing simple program... [ 47.221297] cgroup: Unknown subsys name 'net' [ 47.259982] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:13:03 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff8880107aaaca RCX=ffffffff81f352ed RDX=ffff888015be1b40 RSI=0000000000000000 RDI=0000000000000006 RBP=0000000000000002 RSP=ffff88800cc27930 R8 =0000000000000006 R9 =0000000000000002 R10=0000000000000002 R11=00000000000b6996 R12=0000000000000700 R13=ffff8880107aaac8 R14=dffffc0000000000 R15=0000000000000002 RIP=ffffffff814c07eb RFL=00000246 [---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 00007effe8667900 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=00007ffe0aef2000 CR3=0000000008eee000 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=00007fd59af0d110 CR3=00000000168be000 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=2032323a33313a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a33313a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000