syzkaller login: [ 38.958391] BUG: Bad rss-counter state mm:0000000079434fb6 type:MM_FILEPAGES val:33 [ 38.961188] BUG: Bad rss-counter state mm:0000000079434fb6 type:MM_ANONPAGES val:22 [ 39.089406] ================================================================== [ 39.090152] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.090806] Read of size 8 at addr ffff88800e405df0 by task sshd/220 [ 39.091361] [ 39.091523] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.092177] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.092827] Call Trace: [ 39.093029] [ 39.093227] dump_stack_lvl+0x91/0xf0 [ 39.093555] print_report+0xcc/0x620 [ 39.094083] ? __virt_addr_valid+0x102/0x340 [ 39.094443] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.094856] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.095262] kasan_report+0xbe/0xf0 [ 39.095569] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.096031] vma_interval_tree_remove+0xc75/0xec0 [ 39.096471] vma_prepare+0xc54/0x11a0 [ 39.096791] __split_vma+0x5af/0x950 [ 39.097110] ? __pfx___split_vma+0x10/0x10 [ 39.097455] ? find_held_lock+0x2c/0x110 [ 39.097810] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.098188] ? lock_is_held_type+0x9f/0x120 [ 39.098532] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.098929] ? mtree_range_walk+0x632/0x900 [ 39.099346] ? mas_walk+0x5c7/0x7c0 [ 39.099683] do_vmi_munmap+0x1f1/0x2b0 [ 39.100026] mmap_region+0x1f9/0x2660 [ 39.100360] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.100722] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.101227] ? __pfx_lock_acquire+0x10/0x10 [ 39.101575] ? __pfx_mmap_region+0x10/0x10 [ 39.101933] ? security_mmap_addr+0x7d/0xa0 [ 39.102337] ? get_unmapped_area+0x1f5/0x3f0 [ 39.102711] do_mmap+0x854/0xf00 [ 39.103006] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.103346] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.103733] ksys_mmap_pgoff+0x3af/0x500 [ 39.104096] do_syscall_64+0x3f/0x90 [ 39.104434] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.104910] RIP: 0033:0x7fbafb6fbd82 [ 39.105239] 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 [ 39.106713] RSP: 002b:00007ffe6430aa88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.107339] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbafb6fbd82 [ 39.107955] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbafab35000 [ 39.108532] RBP: 00007fbafab35000 R08: 0000000000000009 R09: 0000000000001000 [ 39.109105] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559c50144f70 [ 39.109682] R13: 00007ffe6430aaa0 R14: 00007ffe6430aad0 R15: 00007ffe6430ae30 [ 39.110253] [ 39.110450] [ 39.110590] Allocated by task 213: [ 39.110867] kasan_save_stack+0x22/0x50 [ 39.111199] kasan_set_track+0x25/0x30 [ 39.111525] __kasan_slab_alloc+0x59/0x70 [ 39.111904] kmem_cache_alloc+0x16b/0x370 [ 39.112297] vm_area_dup+0x20/0x160 [ 39.112609] __split_vma+0x170/0x950 [ 39.112924] split_vma+0xc6/0x110 [ 39.113225] mprotect_fixup+0x8d2/0xb30 [ 39.113560] do_mprotect_pkey+0x87e/0xd40 [ 39.113901] __x64_sys_mprotect+0x78/0xc0 [ 39.114239] do_syscall_64+0x3f/0x90 [ 39.114564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.115021] [ 39.115184] Freed by task 213: [ 39.115454] kasan_save_stack+0x22/0x50 [ 39.115833] kasan_set_track+0x25/0x30 [ 39.116199] kasan_save_free_info+0x2b/0x50 [ 39.116568] __kasan_slab_free+0x10a/0x190 [ 39.116911] kmem_cache_free+0x10d/0x4d0 [ 39.117232] rcu_core+0x8c8/0x2860 [ 39.117527] __do_softirq+0x1b7/0x7d4 [ 39.117834] [ 39.117976] Last potentially related work creation: [ 39.118385] kasan_save_stack+0x22/0x50 [ 39.118706] __kasan_record_aux_stack+0x8e/0xa0 [ 39.119082] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.119555] remove_vma+0x139/0x170 [ 39.119913] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.120300] do_vmi_munmap+0x1f1/0x2b0 [ 39.120630] __vm_munmap+0x138/0x3a0 [ 39.120944] __x64_sys_munmap+0x59/0x80 [ 39.121294] do_syscall_64+0x3f/0x90 [ 39.121611] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.122019] [ 39.122189] Second to last potentially related work creation: [ 39.122670] kasan_save_stack+0x22/0x50 [ 39.123019] __kasan_record_aux_stack+0x8e/0xa0 [ 39.123411] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.123878] remove_vma+0x139/0x170 [ 39.124185] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.124550] do_vmi_munmap+0x1f1/0x2b0 [ 39.124883] mmap_region+0x1f9/0x2660 [ 39.125248] do_mmap+0x854/0xf00 [ 39.125550] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.125884] ksys_mmap_pgoff+0x3af/0x500 [ 39.126218] do_syscall_64+0x3f/0x90 [ 39.126527] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.126962] [ 39.127119] The buggy address belongs to the object at ffff88800e405d98 [ 39.127119] which belongs to the cache vm_area_struct of size 168 [ 39.128168] The buggy address is located 88 bytes inside of [ 39.128168] freed 168-byte region [ffff88800e405d98, ffff88800e405e40) [ 39.129208] [ 39.129368] The buggy address belongs to the physical page: [ 39.129811] page:0000000079a664c7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe405 [ 39.130543] memcg:ffff88800e3ca601 [ 39.130832] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.131282] page_type: 0xffffffff() [ 39.131582] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 39.132197] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3ca601 [ 39.132785] page dumped because: kasan: bad access detected [ 39.133227] [ 39.133378] Memory state around the buggy address: [ 39.133779] ffff88800e405c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 39.134366] ffff88800e405d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 39.135020] >ffff88800e405d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.135634] ^ [ 39.136242] ffff88800e405e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.136830] ffff88800e405e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.137434] ================================================================== [ 39.138506] Disabling lock debugging due to kernel taint [ 40.576390] BUG: Bad rss-counter state mm:000000007b0f94ac type:MM_FILEPAGES val:33 [ 40.577100] BUG: Bad rss-counter state mm:000000007b0f94ac type:MM_ANONPAGES val:22 [ 40.950292] BUG: Bad rss-counter state mm:0000000035a36b75 type:MM_FILEPAGES val:33 [ 40.950978] BUG: Bad rss-counter state mm:0000000035a36b75 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27388' (ECDSA) to the list of known hosts. 2023/06/21 08:27:00 fuzzer started 2023/06/21 08:27:00 dialing manager at localhost:36067 2023/06/21 08:27:00 checking machine... 2023/06/21 08:27:00 checking revisions... [ 41.543972] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:27:01 testing simple program... [ 41.586743] cgroup: Unknown subsys name 'net' [ 41.619915] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:27:00 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=00007f479e55ec80 CR3=000000000e660000 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=2030303a37323a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a37323a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffff888016bbf038 RDX=1ffff11002d77dfb RSI=ffff888016bbef68 RDI=ffff888016bbef98 RBP=ffff888016bbeff0 RSP=ffff888016bbeed8 R8 =0000000000000001 R9 =ffff888016bbefd8 R10=0000000000038001 R11=0000000000006097 R12=ffff888016bbeff8 R13=ffff888016bbefe0 R14=ffff888016bbefd9 R15=ffff888016bbef98 RIP=ffffffff811306da RFL=00000212 [----A--] 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 00007f75031db900 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=00007f7503180008 CR3=000000000d6f6000 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