syzkaller login: [ 28.823458] BUG: Bad rss-counter state mm:0000000097bda661 type:MM_FILEPAGES val:33 [ 28.824676] BUG: Bad rss-counter state mm:0000000097bda661 type:MM_ANONPAGES val:22 [ 28.867484] ================================================================== [ 28.868936] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.870189] Read of size 8 at addr ffff8880168e3d08 by task sshd/220 [ 28.870972] [ 28.871197] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.872078] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.873115] Call Trace: [ 28.873528] [ 28.873861] dump_stack_lvl+0x91/0xf0 [ 28.874535] print_report+0xcc/0x620 [ 28.875128] ? __virt_addr_valid+0x102/0x340 [ 28.875777] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.876544] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.877302] kasan_report+0xbe/0xf0 [ 28.877907] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.878684] vma_interval_tree_remove+0xc75/0xec0 [ 28.879398] vma_prepare+0xc54/0x11a0 [ 28.879978] __split_vma+0x5af/0x950 [ 28.880549] ? __pfx___split_vma+0x10/0x10 [ 28.881198] ? find_held_lock+0x2c/0x110 [ 28.881873] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.882552] ? lock_is_held_type+0x9f/0x120 [ 28.883207] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.883956] ? mtree_range_walk+0x632/0x900 [ 28.884612] ? mas_walk+0x5c7/0x7c0 [ 28.885192] do_vmi_munmap+0x1f1/0x2b0 [ 28.885803] mmap_region+0x1f9/0x2660 [ 28.886386] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.887020] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.887900] ? __pfx_lock_acquire+0x10/0x10 [ 28.888553] ? __pfx_mmap_region+0x10/0x10 [ 28.889203] ? security_mmap_addr+0x7d/0xa0 [ 28.889884] ? get_unmapped_area+0x1f5/0x3f0 [ 28.890550] do_mmap+0x854/0xf00 [ 28.891083] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.891675] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.892370] ksys_mmap_pgoff+0x3af/0x500 [ 28.892967] do_syscall_64+0x3f/0x90 [ 28.893569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.894357] RIP: 0033:0x7f906712fd82 [ 28.894918] 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 [ 28.897471] RSP: 002b:00007ffe0afcb438 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.898498] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f906712fd82 [ 28.899498] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9066569000 [ 28.900508] RBP: 00007f9066569000 R08: 0000000000000009 R09: 0000000000001000 [ 28.901546] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557459e04980 [ 28.902591] R13: 00007ffe0afcb450 R14: 00007ffe0afcb480 R15: 00007ffe0afcb7e0 [ 28.903636] [ 28.903989] [ 28.904251] Allocated by task 213: [ 28.904764] kasan_save_stack+0x22/0x50 [ 28.905385] kasan_set_track+0x25/0x30 [ 28.905995] __kasan_slab_alloc+0x59/0x70 [ 28.906634] kmem_cache_alloc+0x16b/0x370 [ 28.907271] vm_area_dup+0x20/0x160 [ 28.907800] __split_vma+0x170/0x950 [ 28.908360] split_vma+0xc6/0x110 [ 28.908887] mprotect_fixup+0x8d2/0xb30 [ 28.909531] do_mprotect_pkey+0x87e/0xd40 [ 28.910206] __x64_sys_mprotect+0x78/0xc0 [ 28.910845] do_syscall_64+0x3f/0x90 [ 28.911412] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.912195] [ 28.912458] Freed by task 213: [ 28.912935] kasan_save_stack+0x22/0x50 [ 28.913561] kasan_set_track+0x25/0x30 [ 28.914161] kasan_save_free_info+0x2b/0x50 [ 28.914818] __kasan_slab_free+0x10a/0x190 [ 28.915440] kmem_cache_free+0x10d/0x4d0 [ 28.916065] rcu_core+0x8c8/0x2860 [ 28.916615] __do_softirq+0x1b7/0x7d4 [ 28.917180] [ 28.917451] Last potentially related work creation: [ 28.918157] kasan_save_stack+0x22/0x50 [ 28.918768] __kasan_record_aux_stack+0x8e/0xa0 [ 28.919468] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.920256] remove_vma+0x139/0x170 [ 28.920796] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.921474] do_vmi_munmap+0x1f1/0x2b0 [ 28.922046] __vm_munmap+0x138/0x3a0 [ 28.922607] __x64_sys_munmap+0x59/0x80 [ 28.923209] do_syscall_64+0x3f/0x90 [ 28.923775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.924545] [ 28.924809] Second to last potentially related work creation: [ 28.925636] kasan_save_stack+0x22/0x50 [ 28.926246] __kasan_record_aux_stack+0x8e/0xa0 [ 28.926930] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.927728] remove_vma+0x139/0x170 [ 28.928301] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.928973] do_vmi_munmap+0x1f1/0x2b0 [ 28.929584] mmap_region+0x1f9/0x2660 [ 28.930122] do_mmap+0x854/0xf00 [ 28.930586] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.931094] ksys_mmap_pgoff+0x3af/0x500 [ 28.931612] do_syscall_64+0x3f/0x90 [ 28.932100] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.932748] [ 28.932972] The buggy address belongs to the object at ffff8880168e3cb0 [ 28.932972] which belongs to the cache vm_area_struct of size 168 [ 28.934684] The buggy address is located 88 bytes inside of [ 28.934684] freed 168-byte region [ffff8880168e3cb0, ffff8880168e3d58) [ 28.936393] [ 28.936656] The buggy address belongs to the physical page: [ 28.937469] page:000000002690e53b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168e3 [ 28.938719] memcg:ffff8880183b3f01 [ 28.939155] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.939817] page_type: 0xffffffff() [ 28.940295] raw: 0100000000000200 ffff8880087a0c80 ffffea00005186c0 0000000000000004 [ 28.941227] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880183b3f01 [ 28.942192] page dumped because: kasan: bad access detected [ 28.942986] [ 28.943236] Memory state around the buggy address: [ 28.943944] ffff8880168e3c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 28.945001] ffff8880168e3c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 28.946029] >ffff8880168e3d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 28.947118] ^ [ 28.947658] ffff8880168e3d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 28.948690] ffff8880168e3e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 28.949772] ================================================================== [ 28.950895] Disabling lock debugging due to kernel taint [ 30.966581] BUG: Bad rss-counter state mm:000000000a12f062 type:MM_FILEPAGES val:33 [ 30.967889] BUG: Bad rss-counter state mm:000000000a12f062 type:MM_ANONPAGES val:22 [ 31.504530] BUG: Bad rss-counter state mm:0000000083dc99c6 type:MM_FILEPAGES val:33 [ 31.505709] BUG: Bad rss-counter state mm:0000000083dc99c6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2623' (ECDSA) to the list of known hosts. 2023/06/21 07:47:41 fuzzer started 2023/06/21 07:47:41 dialing manager at localhost:36067 2023/06/21 07:47:41 checking machine... 2023/06/21 07:47:41 checking revisions... [ 32.157910] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:47:42 testing simple program... [ 32.209942] cgroup: Unknown subsys name 'net' [ 32.265159] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:47:41 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888017e99800 RCX=0000000000010000 RDX=1ffff11001d45022 RSI=0000000000000002 RDI=ffff88800ea28110 RBP=ffff888015df1b40 RSP=ffff88806ce09da8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000001599eebf88 R12=00000000000f4240 R13=0000000000000002 R14=ffff88800ea28000 R15=dffffc0000000000 RIP=ffffffff8129950b 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 00007f464ffff700 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=00007fffaed03000 CR3=000000000c528000 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=2031343a37343a3730203132206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a343935393320 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a37343a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff8880166a0000 RSI=ffffffff81f2ff1b RDI=0000000000000004 RBP=0000000000000000 RSP=ffff888016577928 R8 =0000000000000004 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000000 R14=ffff888016577c20 R15=0000000000000000 RIP=ffffffff814c0860 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 00007f3f8a757900 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=00007fd5032e1710 CR3=000000001810c000 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=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