syzkaller login: [ 38.687090] BUG: Bad rss-counter state mm:000000005162f761 type:MM_FILEPAGES val:33 [ 38.688205] BUG: Bad rss-counter state mm:000000005162f761 type:MM_ANONPAGES val:22 [ 38.835245] ================================================================== [ 38.836197] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.837145] Read of size 8 at addr ffff88800dcdd798 by task sshd/218 [ 38.837943] [ 38.838160] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.839131] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.840132] Call Trace: [ 38.840452] [ 38.840753] dump_stack_lvl+0x91/0xf0 [ 38.841253] print_report+0xcc/0x620 [ 38.841776] ? __virt_addr_valid+0x102/0x340 [ 38.842327] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.842969] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.843600] kasan_report+0xbe/0xf0 [ 38.844085] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.844729] vma_interval_tree_remove+0xc75/0xec0 [ 38.845340] vma_prepare+0xc54/0x11a0 [ 38.845860] __split_vma+0x5af/0x950 [ 38.846336] ? __pfx___split_vma+0x10/0x10 [ 38.846901] ? find_held_lock+0x2c/0x110 [ 38.847414] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.848042] ? lock_is_held_type+0x9f/0x120 [ 38.848611] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.849216] ? mtree_range_walk+0x632/0x900 [ 38.849803] ? mas_walk+0x5c7/0x7c0 [ 38.850281] do_vmi_munmap+0x1f1/0x2b0 [ 38.850794] mmap_region+0x1f9/0x2660 [ 38.851278] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.851831] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.852592] ? __pfx_lock_acquire+0x10/0x10 [ 38.853139] ? __pfx_mmap_region+0x10/0x10 [ 38.853705] ? security_mmap_addr+0x7d/0xa0 [ 38.854256] ? get_unmapped_area+0x1f5/0x3f0 [ 38.854830] do_mmap+0x854/0xf00 [ 38.855291] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.855819] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.856499] ksys_mmap_pgoff+0x3af/0x500 [ 38.857051] do_syscall_64+0x3f/0x90 [ 38.857564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.858246] RIP: 0033:0x7f97a7716d82 [ 38.858733] 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 [ 38.860987] RSP: 002b:00007fff5f3fe888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.861945] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f97a7716d82 [ 38.862835] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f97a6b50000 [ 38.863720] RBP: 00007f97a6b50000 R08: 0000000000000009 R09: 0000000000001000 [ 38.864591] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f7a5848f70 [ 38.865457] R13: 00007fff5f3fe8a0 R14: 00007fff5f3fe8d0 R15: 00007fff5f3fec30 [ 38.866339] [ 38.866676] [ 38.866912] Allocated by task 211: [ 38.867364] kasan_save_stack+0x22/0x50 [ 38.867888] kasan_set_track+0x25/0x30 [ 38.868410] __kasan_slab_alloc+0x59/0x70 [ 38.868943] kmem_cache_alloc+0x16b/0x370 [ 38.869488] vm_area_dup+0x20/0x160 [ 38.869967] __split_vma+0x170/0x950 [ 38.870428] split_vma+0xc6/0x110 [ 38.870882] mprotect_fixup+0x8d2/0xb30 [ 38.871386] do_mprotect_pkey+0x87e/0xd40 [ 38.871939] __x64_sys_mprotect+0x78/0xc0 [ 38.872458] do_syscall_64+0x3f/0x90 [ 38.872960] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.873652] [ 38.873867] Freed by task 19: [ 38.874261] kasan_save_stack+0x22/0x50 [ 38.874807] kasan_set_track+0x25/0x30 [ 38.875294] kasan_save_free_info+0x2b/0x50 [ 38.875855] __kasan_slab_free+0x10a/0x190 [ 38.876376] kmem_cache_free+0x10d/0x4d0 [ 38.876908] rcu_core+0x8c8/0x2860 [ 38.877355] __do_softirq+0x1b7/0x7d4 [ 38.877873] [ 38.878087] Last potentially related work creation: [ 38.878683] kasan_save_stack+0x22/0x50 [ 38.879189] __kasan_record_aux_stack+0x8e/0xa0 [ 38.879786] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.880427] remove_vma+0x139/0x170 [ 38.880897] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.881474] do_vmi_munmap+0x1f1/0x2b0 [ 38.881988] __vm_munmap+0x138/0x3a0 [ 38.882452] __x64_sys_munmap+0x59/0x80 [ 38.882961] do_syscall_64+0x3f/0x90 [ 38.883432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.884092] [ 38.884304] Second to last potentially related work creation: [ 38.884999] kasan_save_stack+0x22/0x50 [ 38.885508] __kasan_record_aux_stack+0x8e/0xa0 [ 38.886078] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.886717] remove_vma+0x139/0x170 [ 38.887153] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.887736] do_vmi_munmap+0x1f1/0x2b0 [ 38.888210] mmap_region+0x1f9/0x2660 [ 38.888701] do_mmap+0x854/0xf00 [ 38.889117] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.889637] ksys_mmap_pgoff+0x3af/0x500 [ 38.890134] do_syscall_64+0x3f/0x90 [ 38.890630] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.891260] [ 38.891478] The buggy address belongs to the object at ffff88800dcdd740 [ 38.891478] which belongs to the cache vm_area_struct of size 168 [ 38.892964] The buggy address is located 88 bytes inside of [ 38.892964] freed 168-byte region [ffff88800dcdd740, ffff88800dcdd7e8) [ 38.894381] [ 38.894608] The buggy address belongs to the physical page: [ 38.895245] page:0000000099ddea92 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcdd [ 38.896706] memcg:ffff88800de0f701 [ 38.897280] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.898251] page_type: 0xffffffff() [ 38.898860] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.900093] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de0f701 [ 38.901314] page dumped because: kasan: bad access detected [ 38.902217] [ 38.902508] Memory state around the buggy address: [ 38.903290] ffff88800dcdd680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.904442] ffff88800dcdd700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.905607] >ffff88800dcdd780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.906759] ^ [ 38.907418] ffff88800dcdd800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.908572] ffff88800dcdd880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.909725] ================================================================== [ 38.911393] Disabling lock debugging due to kernel taint [ 40.826013] BUG: Bad rss-counter state mm:0000000022423b51 type:MM_FILEPAGES val:33 [ 40.827259] BUG: Bad rss-counter state mm:0000000022423b51 type:MM_ANONPAGES val:22 [ 41.270157] BUG: Bad rss-counter state mm:00000000f624873a type:MM_FILEPAGES val:33 [ 41.271100] BUG: Bad rss-counter state mm:00000000f624873a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39410' (ECDSA) to the list of known hosts. 2023/06/20 21:08:45 fuzzer started 2023/06/20 21:08:46 dialing manager at localhost:36067 2023/06/20 21:08:46 checking machine... 2023/06/20 21:08:46 checking revisions... [ 42.053160] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:08:46 testing simple program... [ 42.105496] cgroup: Unknown subsys name 'net' [ 42.143492] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:08:45 Registers: info registers vcpu 0 RAX=ffffffff83632183 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800bec7e01 RSI=ffff88800bec7e50 RDI=ffff88800bec7e50 RBP=ffff88800bec7880 RSP=ffff88800bec77b8 R8 =ffffffff86143870 R9 =ffff88800bec7868 R10=0000000000038001 R11=00000000000229e6 R12=ffff88800bec7888 R13=ffff88800bec7870 R14=ffff88800bec7e58 R15=ffff88800bec7828 RIP=ffffffff81131041 RFL=00000202 [-------] 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 00007f7066240900 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=00007ffefbec7000 CR3=000000000e5aa000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f9502e1e3f0 CR3=0000000019606000 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=2035343a38303a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a38303a3132203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000