syzkaller login: [ 31.447620] BUG: Bad rss-counter state mm:0000000039ec4cf9 type:MM_FILEPAGES val:33 [ 31.448662] BUG: Bad rss-counter state mm:0000000039ec4cf9 type:MM_ANONPAGES val:22 [ 31.482958] ================================================================== [ 31.483993] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.485125] Read of size 8 at addr ffff8880101563f8 by task sshd/222 [ 31.485948] [ 31.486184] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.487105] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.488151] Call Trace: [ 31.488496] [ 31.488805] dump_stack_lvl+0x91/0xf0 [ 31.489335] print_report+0xcc/0x620 [ 31.489870] ? __virt_addr_valid+0x102/0x340 [ 31.490513] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.491176] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.491848] kasan_report+0xbe/0xf0 [ 31.492354] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.493032] vma_interval_tree_remove+0xc75/0xec0 [ 31.493699] vma_prepare+0xc54/0x11a0 [ 31.494255] __split_vma+0x5af/0x950 [ 31.494776] ? __pfx___split_vma+0x10/0x10 [ 31.495359] ? find_held_lock+0x2c/0x110 [ 31.495932] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.496566] ? lock_is_held_type+0x9f/0x120 [ 31.497161] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.497835] ? mtree_range_walk+0x632/0x900 [ 31.498459] ? mas_walk+0x5c7/0x7c0 [ 31.498981] do_vmi_munmap+0x1f1/0x2b0 [ 31.499528] mmap_region+0x1f9/0x2660 [ 31.500063] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.500631] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.501414] ? __pfx_lock_acquire+0x10/0x10 [ 31.502090] ? __pfx_mmap_region+0x10/0x10 [ 31.502904] ? security_mmap_addr+0x7d/0xa0 [ 31.503592] ? get_unmapped_area+0x1f5/0x3f0 [ 31.504296] do_mmap+0x854/0xf00 [ 31.504842] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.505476] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.506219] ksys_mmap_pgoff+0x3af/0x500 [ 31.506864] do_syscall_64+0x3f/0x90 [ 31.507495] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.508323] RIP: 0033:0x7fc8c1583d82 [ 31.508901] 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 [ 31.512065] RSP: 002b:00007ffc77a38da8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.513230] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc8c1583d82 [ 31.514341] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc8c09bd000 [ 31.515243] RBP: 00007fc8c09bd000 R08: 0000000000000009 R09: 0000000000001000 [ 31.516090] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564f4ab26ec0 [ 31.516952] R13: 00007ffc77a38dc0 R14: 00007ffc77a38df0 R15: 00007ffc77a39150 [ 31.517855] [ 31.518167] [ 31.518402] Allocated by task 215: [ 31.518834] kasan_save_stack+0x22/0x50 [ 31.519353] kasan_set_track+0x25/0x30 [ 31.519849] __kasan_slab_alloc+0x59/0x70 [ 31.520388] kmem_cache_alloc+0x16b/0x370 [ 31.520910] vm_area_dup+0x20/0x160 [ 31.521389] __split_vma+0x170/0x950 [ 31.521872] split_vma+0xc6/0x110 [ 31.522356] mprotect_fixup+0x8d2/0xb30 [ 31.522873] do_mprotect_pkey+0x87e/0xd40 [ 31.523425] __x64_sys_mprotect+0x78/0xc0 [ 31.523950] do_syscall_64+0x3f/0x90 [ 31.524445] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.525093] [ 31.525324] Freed by task 212: [ 31.525727] kasan_save_stack+0x22/0x50 [ 31.526274] kasan_set_track+0x25/0x30 [ 31.526776] kasan_save_free_info+0x2b/0x50 [ 31.527344] __kasan_slab_free+0x10a/0x190 [ 31.527877] kmem_cache_free+0x10d/0x4d0 [ 31.528405] rcu_core+0x8c8/0x2860 [ 31.528851] __do_softirq+0x1b7/0x7d4 [ 31.529346] [ 31.529561] Last potentially related work creation: [ 31.530170] kasan_save_stack+0x22/0x50 [ 31.530693] __kasan_record_aux_stack+0x8e/0xa0 [ 31.531276] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.531926] remove_vma+0x139/0x170 [ 31.532403] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.532968] do_vmi_munmap+0x1f1/0x2b0 [ 31.533473] __vm_munmap+0x138/0x3a0 [ 31.533963] __x64_sys_munmap+0x59/0x80 [ 31.534484] do_syscall_64+0x3f/0x90 [ 31.534959] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.535624] [ 31.535841] The buggy address belongs to the object at ffff8880101563a0 [ 31.535841] which belongs to the cache vm_area_struct of size 168 [ 31.537351] The buggy address is located 88 bytes inside of [ 31.537351] freed 168-byte region [ffff8880101563a0, ffff888010156448) [ 31.538781] [ 31.539000] The buggy address belongs to the physical page: [ 31.539675] page:00000000e411e0e5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10156 [ 31.540771] memcg:ffff88801bd0d101 [ 31.541205] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.541865] page_type: 0xffffffff() [ 31.542362] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.543305] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bd0d101 [ 31.544214] page dumped because: kasan: bad access detected [ 31.544884] [ 31.545100] Memory state around the buggy address: [ 31.545692] ffff888010156280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.546580] ffff888010156300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.547476] >ffff888010156380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.548338] ^ [ 31.549187] ffff888010156400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.550070] ffff888010156480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.550933] ================================================================== [ 31.551895] Disabling lock debugging due to kernel taint [ 34.219482] BUG: Bad rss-counter state mm:00000000faebf5d4 type:MM_FILEPAGES val:33 [ 34.220505] BUG: Bad rss-counter state mm:00000000faebf5d4 type:MM_ANONPAGES val:22 [ 34.657585] BUG: Bad rss-counter state mm:000000000ce9c873 type:MM_FILEPAGES val:33 [ 34.658831] BUG: Bad rss-counter state mm:000000000ce9c873 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11582' (ECDSA) to the list of known hosts. 2023/06/20 16:22:45 fuzzer started 2023/06/20 16:22:45 dialing manager at localhost:36067 2023/06/20 16:22:45 checking machine... 2023/06/20 16:22:45 checking revisions... [ 35.324831] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:22:46 testing simple program... [ 35.383699] cgroup: Unknown subsys name 'net' [ 35.448384] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:22:45 Registers: info registers vcpu 0 RAX=1ffffffff0c77259 RBX=0000000000000001 RCX=ffffffff863b92cc RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff863b92ce RBP=ffff88800fda74c0 RSP=ffff88800fda73f8 R8 =ffffffff863b92d0 R9 =ffff88800fda74a8 R10=0000000000038001 R11=000000000008b8ed R12=ffff88800fda74c8 R13=ffff88800fda74b0 R14=ffff88800fda7a28 R15=ffff88800fda7468 RIP=ffffffff811311c7 RFL=00000217 [----APC] 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 00007f8bfc7ed900 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=00007f8bfcda2650 CR3=000000000dadc000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=ffff888008c04400 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=00007fffc7deec08 CR3=0000000016850000 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=32323a3631203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3133325b646873732035343a3232 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303032 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000