syzkaller login: [ 79.148519] BUG: Bad rss-counter state mm:0000000013e8fd1b type:MM_FILEPAGES val:33 [ 79.149582] BUG: Bad rss-counter state mm:0000000013e8fd1b type:MM_ANONPAGES val:22 [ 79.323508] ================================================================== [ 79.324691] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 79.325774] Read of size 8 at addr ffff88800ec3fed8 by task sshd/219 [ 79.326583] [ 79.326817] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 79.327923] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 79.328966] Call Trace: [ 79.329301] [ 79.329602] dump_stack_lvl+0x91/0xf0 [ 79.330121] print_report+0xcc/0x620 [ 79.330635] ? __virt_addr_valid+0x102/0x340 [ 79.331217] ? vma_interval_tree_remove+0xc75/0xec0 [ 79.331871] ? vma_interval_tree_remove+0xc75/0xec0 [ 79.332531] kasan_report+0xbe/0xf0 [ 79.333034] ? vma_interval_tree_remove+0xc75/0xec0 [ 79.333697] vma_interval_tree_remove+0xc75/0xec0 [ 79.334342] vma_prepare+0xc54/0x11a0 [ 79.334855] __split_vma+0x5af/0x950 [ 79.335358] ? __pfx___split_vma+0x10/0x10 [ 79.335926] ? find_held_lock+0x2c/0x110 [ 79.336504] do_vmi_align_munmap+0x2ba/0x11f0 [ 79.337118] ? lock_is_held_type+0x9f/0x120 [ 79.337696] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 79.338351] ? mtree_range_walk+0x632/0x900 [ 79.338940] ? mas_walk+0x5c7/0x7c0 [ 79.339447] do_vmi_munmap+0x1f1/0x2b0 [ 79.339975] mmap_region+0x1f9/0x2660 [ 79.340494] ? vm_mmap_pgoff+0x15c/0x3a0 [ 79.341045] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 79.341817] ? __pfx_lock_acquire+0x10/0x10 [ 79.342390] ? __pfx_mmap_region+0x10/0x10 [ 79.342963] ? security_mmap_addr+0x7d/0xa0 [ 79.343531] ? get_unmapped_area+0x1f5/0x3f0 [ 79.344121] do_mmap+0x854/0xf00 [ 79.344595] vm_mmap_pgoff+0x1a6/0x3a0 [ 79.345125] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 79.345723] ksys_mmap_pgoff+0x3af/0x500 [ 79.346277] do_syscall_64+0x3f/0x90 [ 79.346782] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 79.347473] RIP: 0033:0x7fd4e5d7ed82 [ 79.347961] 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 [ 79.350250] RSP: 002b:00007ffdc575e108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 79.351230] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd4e5d7ed82 [ 79.352138] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd4e51b8000 [ 79.353055] RBP: 00007fd4e51b8000 R08: 0000000000000009 R09: 0000000000001000 [ 79.353960] R10: 0000000000000812 R11: 0000000000000206 R12: 00005646d880bec0 [ 79.354874] R13: 00007ffdc575e120 R14: 00007ffdc575e150 R15: 00007ffdc575e4b0 [ 79.355796] [ 79.356109] [ 79.356339] Allocated by task 212: [ 79.356795] kasan_save_stack+0x22/0x50 [ 79.357333] kasan_set_track+0x25/0x30 [ 79.357866] __kasan_slab_alloc+0x59/0x70 [ 79.358419] kmem_cache_alloc+0x16b/0x370 [ 79.358967] vm_area_dup+0x20/0x160 [ 79.359448] __split_vma+0x170/0x950 [ 79.359950] split_vma+0xc6/0x110 [ 79.360436] mprotect_fixup+0x8d2/0xb30 [ 79.360966] do_mprotect_pkey+0x87e/0xd40 [ 79.361518] __x64_sys_mprotect+0x78/0xc0 [ 79.362067] do_syscall_64+0x3f/0x90 [ 79.362566] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 79.363248] [ 79.363476] Freed by task 203: [ 79.363893] kasan_save_stack+0x22/0x50 [ 79.364439] kasan_set_track+0x25/0x30 [ 79.364963] kasan_save_free_info+0x2b/0x50 [ 79.365586] __kasan_slab_free+0x10a/0x190 [ 79.366174] kmem_cache_free+0x10d/0x4d0 [ 79.366715] rcu_core+0x8c8/0x2860 [ 79.367192] __do_softirq+0x1b7/0x7d4 [ 79.367703] [ 79.367935] Last potentially related work creation: [ 79.368576] kasan_save_stack+0x22/0x50 [ 79.369107] __kasan_record_aux_stack+0x8e/0xa0 [ 79.369717] __call_rcu_common.constprop.0+0x6a/0xb90 [ 79.370396] remove_vma+0x139/0x170 [ 79.370875] do_vmi_align_munmap+0xd4a/0x11f0 [ 79.371469] do_vmi_munmap+0x1f1/0x2b0 [ 79.371984] __vm_munmap+0x138/0x3a0 [ 79.372487] __x64_sys_munmap+0x59/0x80 [ 79.373013] do_syscall_64+0x3f/0x90 [ 79.373511] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 79.374187] [ 79.374417] Second to last potentially related work creation: [ 79.375142] kasan_save_stack+0x22/0x50 [ 79.375671] __kasan_record_aux_stack+0x8e/0xa0 [ 79.376284] __call_rcu_common.constprop.0+0x6a/0xb90 [ 79.376970] remove_vma+0x139/0x170 [ 79.377445] do_vmi_align_munmap+0xd4a/0x11f0 [ 79.378041] do_vmi_munmap+0x1f1/0x2b0 [ 79.378551] mmap_region+0x1f9/0x2660 [ 79.379056] do_mmap+0x854/0xf00 [ 79.379510] vm_mmap_pgoff+0x1a6/0x3a0 [ 79.380032] ksys_mmap_pgoff+0x3af/0x500 [ 79.380581] do_syscall_64+0x3f/0x90 [ 79.381088] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 79.381769] [ 79.382002] The buggy address belongs to the object at ffff88800ec3fe80 [ 79.382002] which belongs to the cache vm_area_struct of size 168 [ 79.383537] The buggy address is located 88 bytes inside of [ 79.383537] freed 168-byte region [ffff88800ec3fe80, ffff88800ec3ff28) [ 79.385034] [ 79.385264] The buggy address belongs to the physical page: [ 79.385968] page:0000000041c7d4fe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec3f [ 79.387094] memcg:ffff88800cbc1601 [ 79.387543] flags: 0x100000000000200(slab|node=0|zone=1) [ 79.388241] page_type: 0xffffffff() [ 79.388717] raw: 0100000000000200 ffff88800879fc80 ffffea000038d900 dead000000000006 [ 79.389690] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cbc1601 [ 79.390655] page dumped because: kasan: bad access detected [ 79.391355] [ 79.391583] Memory state around the buggy address: [ 79.392209] ffff88800ec3fd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 79.393121] ffff88800ec3fe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 79.394040] >ffff88800ec3fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 79.394960] ^ [ 79.395722] ffff88800ec3ff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 79.396660] ffff88800ec3ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 79.397576] ================================================================== [ 79.398597] Disabling lock debugging due to kernel taint [ 81.945429] BUG: Bad rss-counter state mm:00000000400cf882 type:MM_FILEPAGES val:33 [ 81.946277] BUG: Bad rss-counter state mm:00000000400cf882 type:MM_ANONPAGES val:22 [ 82.382345] BUG: Bad rss-counter state mm:000000004b4be571 type:MM_FILEPAGES val:33 [ 82.383186] BUG: Bad rss-counter state mm:000000004b4be571 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2991' (ECDSA) to the list of known hosts. 2023/06/20 02:09:21 fuzzer started 2023/06/20 02:09:22 dialing manager at localhost:44161 2023/06/20 02:09:22 checking machine... 2023/06/20 02:09:22 checking revisions... [ 83.112669] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:09:22 testing simple program... [ 83.228814] cgroup: Unknown subsys name 'net' [ 83.285601] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:08:41 Registers: info registers vcpu 0 RAX=000000001ff29716 RBX=00000000973c04b9 RCX=ffff888016597bfc RDX=000000000000000a RSI=000000000000000b RDI=00000000877f5d9e RBP=0000000000000078 RSP=ffff888016597b50 R8 =00000000e4057c21 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000800 R14=ffff888016597bd8 R15=000000000000000a RIP=ffffffff82270ebf RFL=00000282 [--S----] 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 00007f25ad62a900 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=00007f25adbe20b0 CR3=000000000f08a000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf09b60 RCX=0000000000000001 RDX=1ffff1100d9e136e RSI=ffffffff8118ddc3 RDI=ffff88806cf09b70 RBP=ffff88806cf09b30 RSP=ffff88806cf09a78 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5c92 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff88800e4cada8 RIP=ffffffff813ad446 RFL=00000296 [--S-AP-] 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=00007fa8c0965980 CR3=000000000d7f4000 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=2031323a39303a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a39303a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000