syzkaller login: [ 30.806031] BUG: Bad rss-counter state mm:00000000ef63f81d type:MM_FILEPAGES val:33 [ 30.807190] BUG: Bad rss-counter state mm:00000000ef63f81d type:MM_ANONPAGES val:22 [ 30.978721] ================================================================== [ 30.979832] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.980979] Read of size 8 at addr ffff88800a144228 by task sshd/221 [ 30.982029] [ 30.982265] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.983185] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.984264] Call Trace: [ 30.984601] [ 30.984918] dump_stack_lvl+0x91/0xf0 [ 30.985445] print_report+0xcc/0x620 [ 30.985963] ? __virt_addr_valid+0x102/0x340 [ 30.986550] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.987206] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.987867] kasan_report+0xbe/0xf0 [ 30.988387] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.989097] vma_interval_tree_remove+0xc75/0xec0 [ 30.989762] vma_prepare+0xc54/0x11a0 [ 30.990288] __split_vma+0x5af/0x950 [ 30.990803] ? __pfx___split_vma+0x10/0x10 [ 30.991382] ? find_held_lock+0x2c/0x110 [ 30.991949] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.992563] ? lock_is_held_type+0x9f/0x120 [ 30.993173] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.993843] ? mtree_range_walk+0x632/0x900 [ 30.994449] ? mas_walk+0x5c7/0x7c0 [ 30.994976] do_vmi_munmap+0x1f1/0x2b0 [ 30.995516] mmap_region+0x1f9/0x2660 [ 30.996053] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.996616] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.997403] ? __pfx_lock_acquire+0x10/0x10 [ 30.997988] ? __pfx_mmap_region+0x10/0x10 [ 30.998566] ? security_mmap_addr+0x7d/0xa0 [ 30.999157] ? get_unmapped_area+0x1f5/0x3f0 [ 30.999759] do_mmap+0x854/0xf00 [ 31.000243] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.000785] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.001424] ksys_mmap_pgoff+0x3af/0x500 [ 31.001978] do_syscall_64+0x3f/0x90 [ 31.002498] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.003210] RIP: 0033:0x7f9933d87d82 [ 31.003710] 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 [ 31.006066] RSP: 002b:00007ffd07e505f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.007057] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9933d87d82 [ 31.007996] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f99331c1000 [ 31.008942] RBP: 00007f99331c1000 R08: 0000000000000009 R09: 0000000000001000 [ 31.009877] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564959e4ed90 [ 31.010800] R13: 00007ffd07e50610 R14: 00007ffd07e50640 R15: 00007ffd07e509a0 [ 31.011713] [ 31.012029] [ 31.012257] Allocated by task 214: [ 31.012715] kasan_save_stack+0x22/0x50 [ 31.013275] kasan_set_track+0x25/0x30 [ 31.013801] __kasan_slab_alloc+0x59/0x70 [ 31.014355] kmem_cache_alloc+0x16b/0x370 [ 31.014916] vm_area_dup+0x20/0x160 [ 31.015413] __split_vma+0x170/0x950 [ 31.015926] split_vma+0xc6/0x110 [ 31.016391] mprotect_fixup+0x8d2/0xb30 [ 31.016935] do_mprotect_pkey+0x87e/0xd40 [ 31.017488] __x64_sys_mprotect+0x78/0xc0 [ 31.018046] do_syscall_64+0x3f/0x90 [ 31.018556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.019240] [ 31.019469] Freed by task 204: [ 31.019895] kasan_save_stack+0x22/0x50 [ 31.020439] kasan_set_track+0x25/0x30 [ 31.020989] kasan_save_free_info+0x2b/0x50 [ 31.021563] __kasan_slab_free+0x10a/0x190 [ 31.022213] kmem_cache_free+0x10d/0x4d0 [ 31.022757] rcu_core+0x8c8/0x2860 [ 31.023230] __do_softirq+0x1b7/0x7d4 [ 31.023738] [ 31.023970] Last potentially related work creation: [ 31.024587] kasan_save_stack+0x22/0x50 [ 31.025136] __kasan_record_aux_stack+0x8e/0xa0 [ 31.025756] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.026445] remove_vma+0x139/0x170 [ 31.026934] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.027524] do_vmi_munmap+0x1f1/0x2b0 [ 31.028041] __vm_munmap+0x138/0x3a0 [ 31.028538] __x64_sys_munmap+0x59/0x80 [ 31.029070] do_syscall_64+0x3f/0x90 [ 31.029575] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.030270] [ 31.030497] The buggy address belongs to the object at ffff88800a1441d0 [ 31.030497] which belongs to the cache vm_area_struct of size 168 [ 31.032079] The buggy address is located 88 bytes inside of [ 31.032079] freed 168-byte region [ffff88800a1441d0, ffff88800a144278) [ 31.033608] [ 31.033845] The buggy address belongs to the physical page: [ 31.034546] page:00000000754e1a5e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xa144 [ 31.035718] memcg:ffff8880147adb01 [ 31.036182] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.036877] page_type: 0xffffffff() [ 31.037368] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.038370] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880147adb01 [ 31.039344] page dumped because: kasan: bad access detected [ 31.040061] [ 31.040292] Memory state around the buggy address: [ 31.040940] ffff88800a144100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.041861] ffff88800a144180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.042781] >ffff88800a144200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.043698] ^ [ 31.044289] ffff88800a144280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.045217] ffff88800a144300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.046125] ================================================================== [ 31.047169] Disabling lock debugging due to kernel taint [ 33.109879] BUG: Bad rss-counter state mm:0000000080c7c720 type:MM_FILEPAGES val:33 [ 33.110716] BUG: Bad rss-counter state mm:0000000080c7c720 type:MM_ANONPAGES val:22 [ 33.539802] BUG: Bad rss-counter state mm:00000000af1e83a7 type:MM_FILEPAGES val:33 [ 33.540976] BUG: Bad rss-counter state mm:00000000af1e83a7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43727' (ECDSA) to the list of known hosts. 2023/06/21 06:13:52 fuzzer started 2023/06/21 06:13:52 dialing manager at localhost:36067 2023/06/21 06:13:52 checking machine... 2023/06/21 06:13:52 checking revisions... [ 34.208748] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:13:52 testing simple program... [ 34.266238] cgroup: Unknown subsys name 'net' [ 34.333936] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:13:52 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=1ffff110028bdfac RCX=0000000000000000 RDX=1ffff11002d4a7d6 RSI=ffffffff81718304 RDI=ffffea00005a94e8 RBP=ffff888016a53eb0 RSP=ffff8880145efd40 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88801a262790 R13=ffffffff852c61f8 R14=0000000016a53007 R15=000000001a262067 RIP=ffffffff81718319 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fdede5f7900 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=00007fdede5d6020 CR3=000000000daf2000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=0000000000000001 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=00007f95efa668d0 CR3=000000000c79c000 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=2031353a33313a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a33313a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000