syzkaller login: [ 31.322466] BUG: Bad rss-counter state mm:000000000c24e859 type:MM_FILEPAGES val:33 [ 31.323672] BUG: Bad rss-counter state mm:000000000c24e859 type:MM_ANONPAGES val:22 [ 31.362752] ================================================================== [ 31.363749] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.364689] Read of size 8 at addr ffff888016447228 by task sshd/219 [ 31.365442] [ 31.365663] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.366503] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.367487] Call Trace: [ 31.367811] [ 31.368096] dump_stack_lvl+0x91/0xf0 [ 31.368583] print_report+0xcc/0x620 [ 31.369059] ? __virt_addr_valid+0x102/0x340 [ 31.369618] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.370225] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.370849] kasan_report+0xbe/0xf0 [ 31.371326] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.371950] vma_interval_tree_remove+0xc75/0xec0 [ 31.372560] vma_prepare+0xc54/0x11a0 [ 31.373032] __split_vma+0x5af/0x950 [ 31.373503] ? __pfx___split_vma+0x10/0x10 [ 31.374026] ? find_held_lock+0x2c/0x110 [ 31.374538] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.375119] ? lock_is_held_type+0x9f/0x120 [ 31.375649] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.376245] ? mtree_range_walk+0x632/0x900 [ 31.376796] ? mas_walk+0x5c7/0x7c0 [ 31.377267] do_vmi_munmap+0x1f1/0x2b0 [ 31.377755] mmap_region+0x1f9/0x2660 [ 31.378228] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.378740] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.379440] ? __pfx_lock_acquire+0x10/0x10 [ 31.379966] ? __pfx_mmap_region+0x10/0x10 [ 31.380489] ? security_mmap_addr+0x7d/0xa0 [ 31.381010] ? get_unmapped_area+0x1f5/0x3f0 [ 31.381555] do_mmap+0x854/0xf00 [ 31.381988] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.382483] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.383047] ksys_mmap_pgoff+0x3af/0x500 [ 31.383556] do_syscall_64+0x3f/0x90 [ 31.384037] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.384672] RIP: 0033:0x7ff2e9bead82 [ 31.385119] 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 [ 31.387222] RSP: 002b:00007ffd4e8285e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.388108] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff2e9bead82 [ 31.388950] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff2e9024000 [ 31.389781] RBP: 00007ff2e9024000 R08: 0000000000000009 R09: 0000000000001000 [ 31.390618] R10: 0000000000000812 R11: 0000000000000206 R12: 00005612ee4f7d90 [ 31.391446] R13: 00007ffd4e828600 R14: 00007ffd4e828630 R15: 00007ffd4e828990 [ 31.392288] [ 31.392579] [ 31.392790] Allocated by task 212: [ 31.393217] kasan_save_stack+0x22/0x50 [ 31.393716] kasan_set_track+0x25/0x30 [ 31.394208] __kasan_slab_alloc+0x59/0x70 [ 31.394742] kmem_cache_alloc+0x16b/0x370 [ 31.395260] vm_area_dup+0x20/0x160 [ 31.395714] __split_vma+0x170/0x950 [ 31.396176] split_vma+0xc6/0x110 [ 31.396612] mprotect_fixup+0x8d2/0xb30 [ 31.397106] do_mprotect_pkey+0x87e/0xd40 [ 31.397619] __x64_sys_mprotect+0x78/0xc0 [ 31.398133] do_syscall_64+0x3f/0x90 [ 31.398606] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.399325] [ 31.399541] Freed by task 212: [ 31.399932] kasan_save_stack+0x22/0x50 [ 31.400442] kasan_set_track+0x25/0x30 [ 31.400931] kasan_save_free_info+0x2b/0x50 [ 31.401457] __kasan_slab_free+0x10a/0x190 [ 31.401990] kmem_cache_free+0x10d/0x4d0 [ 31.402493] rcu_core+0x8c8/0x2860 [ 31.402947] __do_softirq+0x1b7/0x7d4 [ 31.403426] [ 31.403647] Last potentially related work creation: [ 31.404226] kasan_save_stack+0x22/0x50 [ 31.404722] __kasan_record_aux_stack+0x8e/0xa0 [ 31.405290] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.405927] remove_vma+0x139/0x170 [ 31.406368] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.406929] do_vmi_munmap+0x1f1/0x2b0 [ 31.407408] __vm_munmap+0x138/0x3a0 [ 31.407868] __x64_sys_munmap+0x59/0x80 [ 31.408360] do_syscall_64+0x3f/0x90 [ 31.408834] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.409470] [ 31.409683] The buggy address belongs to the object at ffff8880164471d0 [ 31.409683] which belongs to the cache vm_area_struct of size 168 [ 31.411146] The buggy address is located 88 bytes inside of [ 31.411146] freed 168-byte region [ffff8880164471d0, ffff888016447278) [ 31.412528] [ 31.412739] The buggy address belongs to the physical page: [ 31.413396] page:00000000603bfe7e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16447 [ 31.414474] memcg:ffff88800dd11201 [ 31.414901] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.415537] page_type: 0xffffffff() [ 31.415977] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.416879] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd11201 [ 31.417773] page dumped because: kasan: bad access detected [ 31.418426] [ 31.418644] Memory state around the buggy address: [ 31.419217] ffff888016447100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.420057] ffff888016447180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.420904] >ffff888016447200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.421739] ^ [ 31.422284] ffff888016447280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.423143] ffff888016447300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.423981] ================================================================== [ 31.425112] Disabling lock debugging due to kernel taint [ 33.346369] BUG: Bad rss-counter state mm:000000006fee54fc type:MM_FILEPAGES val:33 [ 33.347314] BUG: Bad rss-counter state mm:000000006fee54fc type:MM_ANONPAGES val:22 [ 33.826861] BUG: Bad rss-counter state mm:00000000ccccb634 type:MM_FILEPAGES val:33 [ 33.827903] BUG: Bad rss-counter state mm:00000000ccccb634 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52618' (ECDSA) to the list of known hosts. 2023/06/21 05:26:50 fuzzer started 2023/06/21 05:26:50 dialing manager at localhost:36067 2023/06/21 05:26:50 checking machine... 2023/06/21 05:26:50 checking revisions... [ 34.557722] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:26:51 testing simple program... [ 34.610354] cgroup: Unknown subsys name 'net' [ 34.669410] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:26:50 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fd8c962ffd0 CR3=0000000015a1e000 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=36323a3530203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363033 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000005 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff817f69a3 RDI=0000000000000000 RBP=ffffffff87b7de20 RSP=ffff888017cd7280 R8 =0000000000000005 R9 =00000000ffffffff R10=0000000000000000 R11=0000000000000282 R12=0000000000052800 R13=0000000000000001 R14=0000000000000001 R15=00000000ffffffff RIP=ffffffff817f69f0 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 00007fcb39599900 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=00007fcb39578020 CR3=000000000d934000 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=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