syzkaller login: [ 32.639142] BUG: Bad rss-counter state mm:0000000024ca0d8e type:MM_FILEPAGES val:33 [ 32.640589] BUG: Bad rss-counter state mm:0000000024ca0d8e type:MM_ANONPAGES val:22 [ 32.799300] ================================================================== [ 32.800232] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.801201] Read of size 8 at addr ffff888019c28880 by task sshd/221 [ 32.801998] [ 32.802346] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.803225] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.804217] Call Trace: [ 32.804548] [ 32.804834] dump_stack_lvl+0x91/0xf0 [ 32.805333] print_report+0xcc/0x620 [ 32.805855] ? __virt_addr_valid+0x102/0x340 [ 32.806418] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.807043] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.807670] kasan_report+0xbe/0xf0 [ 32.808153] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.808785] vma_interval_tree_remove+0xc75/0xec0 [ 32.809407] vma_prepare+0xc54/0x11a0 [ 32.809910] __split_vma+0x5af/0x950 [ 32.810390] ? __pfx___split_vma+0x10/0x10 [ 32.810925] ? find_held_lock+0x2c/0x110 [ 32.811449] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.812021] ? lock_is_held_type+0x9f/0x120 [ 32.812566] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.813190] ? mtree_range_walk+0x632/0x900 [ 32.813759] ? mas_walk+0x5c7/0x7c0 [ 32.814239] do_vmi_munmap+0x1f1/0x2b0 [ 32.814746] mmap_region+0x1f9/0x2660 [ 32.815240] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.815765] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.816493] ? __pfx_lock_acquire+0x10/0x10 [ 32.817042] ? __pfx_mmap_region+0x10/0x10 [ 32.817606] ? security_mmap_addr+0x7d/0xa0 [ 32.818145] ? get_unmapped_area+0x1f5/0x3f0 [ 32.818716] do_mmap+0x854/0xf00 [ 32.819170] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.819675] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.820240] ksys_mmap_pgoff+0x3af/0x500 [ 32.820764] do_syscall_64+0x3f/0x90 [ 32.821248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.821912] RIP: 0033:0x7ff3e0975d82 [ 32.822389] 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 [ 32.824556] RSP: 002b:00007ffd61cea088 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.825503] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff3e0975d82 [ 32.826375] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff3dfdaf000 [ 32.827243] RBP: 00007ff3dfdaf000 R08: 0000000000000009 R09: 0000000000001000 [ 32.828105] R10: 0000000000000812 R11: 0000000000000206 R12: 00005596ab036ec0 [ 32.828957] R13: 00007ffd61cea0a0 R14: 00007ffd61cea0d0 R15: 00007ffd61cea430 [ 32.829834] [ 32.830140] [ 32.830368] Allocated by task 213: [ 32.830813] kasan_save_stack+0x22/0x50 [ 32.831344] kasan_set_track+0x25/0x30 [ 32.831851] __kasan_slab_alloc+0x59/0x70 [ 32.832398] kmem_cache_alloc+0x16b/0x370 [ 32.832927] vm_area_dup+0x20/0x160 [ 32.833402] __split_vma+0x170/0x950 [ 32.833896] split_vma+0xc6/0x110 [ 32.834353] mprotect_fixup+0x8d2/0xb30 [ 32.834871] do_mprotect_pkey+0x87e/0xd40 [ 32.835397] __x64_sys_mprotect+0x78/0xc0 [ 32.835942] do_syscall_64+0x3f/0x90 [ 32.836415] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.837072] [ 32.837292] Freed by task 213: [ 32.837710] kasan_save_stack+0x22/0x50 [ 32.838226] kasan_set_track+0x25/0x30 [ 32.838740] kasan_save_free_info+0x2b/0x50 [ 32.839301] __kasan_slab_free+0x10a/0x190 [ 32.839857] kmem_cache_free+0x10d/0x4d0 [ 32.840395] rcu_core+0x8c8/0x2860 [ 32.840878] __do_softirq+0x1b7/0x7d4 [ 32.841392] [ 32.841631] Last potentially related work creation: [ 32.842249] kasan_save_stack+0x22/0x50 [ 32.842781] __kasan_record_aux_stack+0x8e/0xa0 [ 32.843384] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.844068] remove_vma+0x139/0x170 [ 32.844550] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.845148] do_vmi_munmap+0x1f1/0x2b0 [ 32.845678] __vm_munmap+0x138/0x3a0 [ 32.846179] __x64_sys_munmap+0x59/0x80 [ 32.846704] do_syscall_64+0x3f/0x90 [ 32.847215] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.847910] [ 32.848139] The buggy address belongs to the object at ffff888019c28828 [ 32.848139] which belongs to the cache vm_area_struct of size 168 [ 32.849719] The buggy address is located 88 bytes inside of [ 32.849719] freed 168-byte region [ffff888019c28828, ffff888019c288d0) [ 32.851195] [ 32.851422] The buggy address belongs to the physical page: [ 32.852129] page:000000004db96980 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c28 [ 32.853280] memcg:ffff88800cac3d01 [ 32.853742] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.854438] page_type: 0xffffffff() [ 32.854915] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.855899] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cac3d01 [ 32.856861] page dumped because: kasan: bad access detected [ 32.857574] [ 32.857806] Memory state around the buggy address: [ 32.858415] ffff888019c28780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 32.859319] ffff888019c28800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.860227] >ffff888019c28880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.861129] ^ [ 32.861578] ffff888019c28900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.862482] ffff888019c28980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 32.863401] ================================================================== [ 32.864489] Disabling lock debugging due to kernel taint [ 34.869262] BUG: Bad rss-counter state mm:0000000028ff1006 type:MM_FILEPAGES val:33 [ 34.870053] BUG: Bad rss-counter state mm:0000000028ff1006 type:MM_ANONPAGES val:22 [ 35.304102] BUG: Bad rss-counter state mm:00000000caeecc03 type:MM_FILEPAGES val:33 [ 35.304878] BUG: Bad rss-counter state mm:00000000caeecc03 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58333' (ECDSA) to the list of known hosts. 2023/06/20 04:37:25 fuzzer started 2023/06/20 04:37:25 dialing manager at localhost:44161 2023/06/20 04:37:25 checking machine... 2023/06/20 04:37:25 checking revisions... [ 36.007361] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:37:25 testing simple program... [ 36.049368] cgroup: Unknown subsys name 'net' [ 36.091788] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:37:22 Registers: info registers vcpu 0 RAX=ffffffff81859f8c RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100206af5d RSI=ffffffff81859f8c RDI=ffff888010357b58 RBP=ffff888010357b28 RSP=ffff888010357a88 R8 =0000000000000001 R9 =ffff888010357ad0 R10=0000000000038001 R11=0000000000023884 R12=ffff888010357b58 R13=0000000000000000 R14=ffff8880142051c0 R15=ffff88800dbac260 RIP=ffffffff813ad420 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 00007fce40d35900 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=00007fce401ab7e0 CR3=000000000c6ac000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f91033fc6521e13c00000000000ae988 XMM05=fdf09ffc8271fec10000000000136660 XMM06=c291bd5c70af25b90000000000135450 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=ffff888008c58400 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=00007fa75b72b0b0 CR3=000000000e0d4000 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=37333a3430203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343036 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000