syzkaller login: [ 34.920250] BUG: Bad rss-counter state mm:000000006900e2c2 type:MM_FILEPAGES val:33 [ 34.921517] BUG: Bad rss-counter state mm:000000006900e2c2 type:MM_ANONPAGES val:22 [ 35.093676] ================================================================== [ 35.094741] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.095848] Read of size 8 at addr ffff88800d8e3b38 by task sshd/220 [ 35.096976] [ 35.097238] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.098210] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.099203] Call Trace: [ 35.099526] [ 35.099805] dump_stack_lvl+0x91/0xf0 [ 35.100295] print_report+0xcc/0x620 [ 35.100775] ? __virt_addr_valid+0x102/0x340 [ 35.101345] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.101958] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.102566] kasan_report+0xbe/0xf0 [ 35.103037] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.103664] vma_interval_tree_remove+0xc75/0xec0 [ 35.104266] vma_prepare+0xc54/0x11a0 [ 35.104741] __split_vma+0x5af/0x950 [ 35.105232] ? __pfx___split_vma+0x10/0x10 [ 35.105763] ? find_held_lock+0x2c/0x110 [ 35.106285] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.106841] ? lock_is_held_type+0x9f/0x120 [ 35.107376] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.107973] ? mtree_range_walk+0x632/0x900 [ 35.108514] ? mas_walk+0x5c7/0x7c0 [ 35.108989] do_vmi_munmap+0x1f1/0x2b0 [ 35.109485] mmap_region+0x1f9/0x2660 [ 35.109966] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.110616] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.111378] ? __pfx_lock_acquire+0x10/0x10 [ 35.111889] ? __pfx_mmap_region+0x10/0x10 [ 35.112419] ? security_mmap_addr+0x7d/0xa0 [ 35.112948] ? get_unmapped_area+0x1f5/0x3f0 [ 35.113501] do_mmap+0x854/0xf00 [ 35.113938] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.114428] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.114983] ksys_mmap_pgoff+0x3af/0x500 [ 35.115484] do_syscall_64+0x3f/0x90 [ 35.115961] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.116606] RIP: 0033:0x7fa6d46f9d82 [ 35.117060] 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 [ 35.119185] RSP: 002b:00007ffe218cb588 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.120085] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa6d46f9d82 [ 35.120929] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa6d3b33000 [ 35.121776] RBP: 00007fa6d3b33000 R08: 0000000000000009 R09: 0000000000001000 [ 35.122610] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562ce7615ec0 [ 35.123445] R13: 00007ffe218cb5a0 R14: 00007ffe218cb5d0 R15: 00007ffe218cb930 [ 35.124292] [ 35.124580] [ 35.124794] Allocated by task 212: [ 35.125222] kasan_save_stack+0x22/0x50 [ 35.125725] kasan_set_track+0x25/0x30 [ 35.126211] __kasan_slab_alloc+0x59/0x70 [ 35.126726] kmem_cache_alloc+0x16b/0x370 [ 35.127238] vm_area_dup+0x20/0x160 [ 35.127689] __split_vma+0x170/0x950 [ 35.128151] split_vma+0xc6/0x110 [ 35.128588] mprotect_fixup+0x8d2/0xb30 [ 35.129088] do_mprotect_pkey+0x87e/0xd40 [ 35.129627] __x64_sys_mprotect+0x78/0xc0 [ 35.130143] do_syscall_64+0x3f/0x90 [ 35.130608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.131254] [ 35.131467] Freed by task 212: [ 35.131852] kasan_save_stack+0x22/0x50 [ 35.132351] kasan_set_track+0x25/0x30 [ 35.132841] kasan_save_free_info+0x2b/0x50 [ 35.133375] __kasan_slab_free+0x10a/0x190 [ 35.133905] kmem_cache_free+0x10d/0x4d0 [ 35.134404] rcu_core+0x8c8/0x2860 [ 35.134845] __do_softirq+0x1b7/0x7d4 [ 35.135319] [ 35.135532] Last potentially related work creation: [ 35.136112] kasan_save_stack+0x22/0x50 [ 35.136607] __kasan_record_aux_stack+0x8e/0xa0 [ 35.137176] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.137909] remove_vma+0x139/0x170 [ 35.138358] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.138908] do_vmi_munmap+0x1f1/0x2b0 [ 35.139388] __vm_munmap+0x138/0x3a0 [ 35.139851] __x64_sys_munmap+0x59/0x80 [ 35.140340] do_syscall_64+0x3f/0x90 [ 35.140805] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.141450] [ 35.141663] Second to last potentially related work creation: [ 35.142337] kasan_save_stack+0x22/0x50 [ 35.142831] __kasan_record_aux_stack+0x8e/0xa0 [ 35.143395] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.144042] remove_vma+0x139/0x170 [ 35.144489] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.145041] do_vmi_munmap+0x1f1/0x2b0 [ 35.145532] mmap_region+0x1f9/0x2660 [ 35.146002] do_mmap+0x854/0xf00 [ 35.146428] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.146920] ksys_mmap_pgoff+0x3af/0x500 [ 35.147415] do_syscall_64+0x3f/0x90 [ 35.147887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.148522] [ 35.148736] The buggy address belongs to the object at ffff88800d8e3ae0 [ 35.148736] which belongs to the cache vm_area_struct of size 168 [ 35.150200] The buggy address is located 88 bytes inside of [ 35.150200] freed 168-byte region [ffff88800d8e3ae0, ffff88800d8e3b88) [ 35.151578] [ 35.151791] The buggy address belongs to the physical page: [ 35.152443] page:0000000077b70fc1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd8e3 [ 35.153519] memcg:ffff88800d7f7c01 [ 35.153938] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.154627] page_type: 0xffffffff() [ 35.155070] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 35.155974] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d7f7c01 [ 35.156877] page dumped because: kasan: bad access detected [ 35.157543] [ 35.157756] Memory state around the buggy address: [ 35.158334] ffff88800d8e3a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.159178] ffff88800d8e3a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 35.160026] >ffff88800d8e3b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.160864] ^ [ 35.161482] ffff88800d8e3b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 35.162324] ffff88800d8e3c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 35.163167] ================================================================== [ 35.164110] Disabling lock debugging due to kernel taint [ 37.433911] BUG: Bad rss-counter state mm:000000000bf7ead3 type:MM_FILEPAGES val:33 [ 37.434959] BUG: Bad rss-counter state mm:000000000bf7ead3 type:MM_ANONPAGES val:22 [ 37.811476] BUG: Bad rss-counter state mm:000000003539fd1d type:MM_FILEPAGES val:33 [ 37.812031] BUG: Bad rss-counter state mm:000000003539fd1d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50042' (ECDSA) to the list of known hosts. 2023/06/20 04:44:56 fuzzer started 2023/06/20 04:44:56 dialing manager at localhost:44161 2023/06/20 04:44:56 checking machine... 2023/06/20 04:44:56 checking revisions... [ 38.457347] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:44:57 testing simple program... [ 38.509714] cgroup: Unknown subsys name 'net' [ 38.563130] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:44:50 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11002dfce36 RSI=ffffffff846000aa RDI=ffff888016fe7220 RBP=ffff888016fe71f0 RSP=ffff888016fe7150 R8 =0000000000000001 R9 =ffff888016fe7198 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff888016fe7220 R13=0000000000000000 R14=ffff88800cc91b40 R15=ffff88800e89a390 RIP=ffffffff813ad42e RFL=00000286 [--S--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 00007fea96334900 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=000055cbc2c69210 CR3=000000001d138000 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=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 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=0000000000000001 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=00007fb0c3506ec0 CR3=000000000ec7e000 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=2036353a34343a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a34343a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000