syzkaller login: [ 31.438690] BUG: Bad rss-counter state mm:00000000804e73e3 type:MM_FILEPAGES val:33 [ 31.440896] BUG: Bad rss-counter state mm:00000000804e73e3 type:MM_ANONPAGES val:22 [ 31.619191] ================================================================== [ 31.620348] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.621649] Read of size 8 at addr ffff88801a0763f8 by task sshd/220 [ 31.622526] [ 31.622761] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.623716] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.624762] Call Trace: [ 31.625107] [ 31.625428] dump_stack_lvl+0x91/0xf0 [ 31.625958] print_report+0xcc/0x620 [ 31.626482] ? __virt_addr_valid+0x102/0x340 [ 31.627082] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.627749] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.628435] kasan_report+0xbe/0xf0 [ 31.628966] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.629686] vma_interval_tree_remove+0xc75/0xec0 [ 31.630361] vma_prepare+0xc54/0x11a0 [ 31.630900] __split_vma+0x5af/0x950 [ 31.631431] ? __pfx___split_vma+0x10/0x10 [ 31.632028] ? find_held_lock+0x2c/0x110 [ 31.632613] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.633247] ? lock_is_held_type+0x9f/0x120 [ 31.633872] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.634556] ? mtree_range_walk+0x632/0x900 [ 31.635174] ? mas_walk+0x5c7/0x7c0 [ 31.635709] do_vmi_munmap+0x1f1/0x2b0 [ 31.636262] mmap_region+0x1f9/0x2660 [ 31.636797] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.637374] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.638164] ? __pfx_lock_acquire+0x10/0x10 [ 31.638753] ? __pfx_mmap_region+0x10/0x10 [ 31.639338] ? security_mmap_addr+0x7d/0xa0 [ 31.639930] ? get_unmapped_area+0x1f5/0x3f0 [ 31.640539] do_mmap+0x854/0xf00 [ 31.641023] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.641600] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.642220] ksys_mmap_pgoff+0x3af/0x500 [ 31.642783] do_syscall_64+0x3f/0x90 [ 31.643317] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.644045] RIP: 0033:0x7fc3a11b6d82 [ 31.644552] 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 [ 31.646928] RSP: 002b:00007ffe95538948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.647933] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc3a11b6d82 [ 31.648872] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc3a05f0000 [ 31.649822] RBP: 00007fc3a05f0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.650751] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555db5d48ec0 [ 31.651688] R13: 00007ffe95538960 R14: 00007ffe95538990 R15: 00007ffe95538cf0 [ 31.652631] [ 31.652954] [ 31.653188] Allocated by task 213: [ 31.653683] kasan_save_stack+0x22/0x50 [ 31.654243] kasan_set_track+0x25/0x30 [ 31.654792] __kasan_slab_alloc+0x59/0x70 [ 31.655368] kmem_cache_alloc+0x16b/0x370 [ 31.655933] vm_area_dup+0x20/0x160 [ 31.656431] __split_vma+0x170/0x950 [ 31.656952] split_vma+0xc6/0x110 [ 31.657446] mprotect_fixup+0x8d2/0xb30 [ 31.657999] do_mprotect_pkey+0x87e/0xd40 [ 31.658572] __x64_sys_mprotect+0x78/0xc0 [ 31.659147] do_syscall_64+0x3f/0x90 [ 31.659671] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.660377] [ 31.660619] Freed by task 213: [ 31.661048] kasan_save_stack+0x22/0x50 [ 31.661613] kasan_set_track+0x25/0x30 [ 31.662154] kasan_save_free_info+0x2b/0x50 [ 31.662748] __kasan_slab_free+0x10a/0x190 [ 31.663345] kmem_cache_free+0x10d/0x4d0 [ 31.663899] rcu_core+0x8c8/0x2860 [ 31.664385] __do_softirq+0x1b7/0x7d4 [ 31.664909] [ 31.665143] Last potentially related work creation: [ 31.665799] kasan_save_stack+0x22/0x50 [ 31.666354] __kasan_record_aux_stack+0x8e/0xa0 [ 31.666983] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.667684] remove_vma+0x139/0x170 [ 31.668172] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.668779] do_vmi_munmap+0x1f1/0x2b0 [ 31.669311] __vm_munmap+0x138/0x3a0 [ 31.669827] __x64_sys_munmap+0x59/0x80 [ 31.670375] do_syscall_64+0x3f/0x90 [ 31.670900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.671603] [ 31.671836] The buggy address belongs to the object at ffff88801a0763a0 [ 31.671836] which belongs to the cache vm_area_struct of size 168 [ 31.673446] The buggy address is located 88 bytes inside of [ 31.673446] freed 168-byte region [ffff88801a0763a0, ffff88801a076448) [ 31.674971] [ 31.675211] The buggy address belongs to the physical page: [ 31.675926] page:000000007e4aecd3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a076 [ 31.677118] memcg:ffff88801a077001 [ 31.677593] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.678287] page_type: 0xffffffff() [ 31.678773] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.679768] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a077001 [ 31.680759] page dumped because: kasan: bad access detected [ 31.681483] [ 31.681716] Memory state around the buggy address: [ 31.682351] ffff88801a076280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.683287] ffff88801a076300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.684214] >ffff88801a076380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.685136] ^ [ 31.686054] ffff88801a076400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.686988] ffff88801a076480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.687909] ================================================================== [ 31.689045] Disabling lock debugging due to kernel taint [ 34.104761] BUG: Bad rss-counter state mm:0000000078b09f15 type:MM_FILEPAGES val:31 [ 34.105948] BUG: Bad rss-counter state mm:0000000078b09f15 type:MM_ANONPAGES val:22 [ 34.637935] BUG: Bad rss-counter state mm:0000000094359918 type:MM_FILEPAGES val:33 [ 34.639107] BUG: Bad rss-counter state mm:0000000094359918 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11247' (ECDSA) to the list of known hosts. 2023/06/20 18:02:59 fuzzer started 2023/06/20 18:03:00 dialing manager at localhost:36067 2023/06/20 18:03:00 checking machine... 2023/06/20 18:03:00 checking revisions... [ 35.293527] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:03:00 testing simple program... [ 35.346312] cgroup: Unknown subsys name 'net' [ 35.405450] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:02:59 Registers: info registers vcpu 0 RAX=ffffea0000253a01 RBX=00000000000000e8 RCX=0000000000000000 RDX=1ffffd400004a761 RSI=ffffffff8184cfb7 RDI=ffffea0000253b08 RBP=ffff8880094ecfa8 RSP=ffff888019dd7878 R8 =0000000000000006 R9 =ffff8880094ecec0 R10=ffff8880894ecec0 R11=0000000000000000 R12=ffff8880094ecec0 R13=0000000000000001 R14=ffffea0000253b00 R15=ffffea0000253b00 RIP=ffffffff8184d00e 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 00007fbfe2ea3900 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=00007ffd87c45000 CR3=000000001a23c000 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=0000006f730074696d7265705f6d6170 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=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=00007fa3c788bc30 CR3=000000000d9aa000 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=2039353a32303a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a32303a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000