syzkaller login: [ 31.430309] BUG: Bad rss-counter state mm:0000000056d20c35 type:MM_FILEPAGES val:33 [ 31.431525] BUG: Bad rss-counter state mm:0000000056d20c35 type:MM_ANONPAGES val:22 [ 31.468930] ================================================================== [ 31.469924] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.470856] Read of size 8 at addr ffff88800ea6bc20 by task sshd/220 [ 31.471677] [ 31.471897] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.472754] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.473760] Call Trace: [ 31.474076] [ 31.474366] dump_stack_lvl+0x91/0xf0 [ 31.474852] print_report+0xcc/0x620 [ 31.475337] ? __virt_addr_valid+0x102/0x340 [ 31.475892] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.476510] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.477122] kasan_report+0xbe/0xf0 [ 31.477603] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.478229] vma_interval_tree_remove+0xc75/0xec0 [ 31.478824] vma_prepare+0xc54/0x11a0 [ 31.479301] __split_vma+0x5af/0x950 [ 31.479767] ? __pfx___split_vma+0x10/0x10 [ 31.480297] ? find_held_lock+0x2c/0x110 [ 31.480812] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.481382] ? lock_is_held_type+0x9f/0x120 [ 31.481922] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.482528] ? mtree_range_walk+0x632/0x900 [ 31.483076] ? mas_walk+0x5c7/0x7c0 [ 31.483546] do_vmi_munmap+0x1f1/0x2b0 [ 31.484035] mmap_region+0x1f9/0x2660 [ 31.484519] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.485022] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.485745] ? __pfx_lock_acquire+0x10/0x10 [ 31.486276] ? __pfx_mmap_region+0x10/0x10 [ 31.486804] ? security_mmap_addr+0x7d/0xa0 [ 31.487335] ? get_unmapped_area+0x1f5/0x3f0 [ 31.487892] do_mmap+0x854/0xf00 [ 31.488329] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.488821] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.489394] ksys_mmap_pgoff+0x3af/0x500 [ 31.489902] do_syscall_64+0x3f/0x90 [ 31.490375] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.491013] RIP: 0033:0x7fed4bca1d82 [ 31.491474] 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 [ 31.493589] RSP: 002b:00007ffca054ed28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.494491] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fed4bca1d82 [ 31.495345] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fed4b0db000 [ 31.496182] RBP: 00007fed4b0db000 R08: 0000000000000009 R09: 0000000000001000 [ 31.497023] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560e9d664ec0 [ 31.497889] R13: 00007ffca054ed40 R14: 00007ffca054ed70 R15: 00007ffca054f0d0 [ 31.498737] [ 31.499029] [ 31.499243] Allocated by task 213: [ 31.499664] kasan_save_stack+0x22/0x50 [ 31.500166] kasan_set_track+0x25/0x30 [ 31.500658] __kasan_slab_alloc+0x59/0x70 [ 31.501184] kmem_cache_alloc+0x16b/0x370 [ 31.501707] vm_area_dup+0x20/0x160 [ 31.502158] __split_vma+0x170/0x950 [ 31.502619] split_vma+0xc6/0x110 [ 31.503051] mprotect_fixup+0x8d2/0xb30 [ 31.503557] do_mprotect_pkey+0x87e/0xd40 [ 31.504082] __x64_sys_mprotect+0x78/0xc0 [ 31.504605] do_syscall_64+0x3f/0x90 [ 31.505074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.505729] [ 31.505942] Freed by task 213: [ 31.506328] kasan_save_stack+0x22/0x50 [ 31.506830] kasan_set_track+0x25/0x30 [ 31.507331] kasan_save_free_info+0x2b/0x50 [ 31.507853] __kasan_slab_free+0x10a/0x190 [ 31.508381] kmem_cache_free+0x10d/0x4d0 [ 31.508880] rcu_core+0x8c8/0x2860 [ 31.509332] __do_softirq+0x1b7/0x7d4 [ 31.509802] [ 31.510017] Last potentially related work creation: [ 31.510597] kasan_save_stack+0x22/0x50 [ 31.511098] __kasan_record_aux_stack+0x8e/0xa0 [ 31.511685] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.512330] remove_vma+0x139/0x170 [ 31.512783] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.513348] do_vmi_munmap+0x1f1/0x2b0 [ 31.513841] __vm_munmap+0x138/0x3a0 [ 31.514330] __x64_sys_munmap+0x59/0x80 [ 31.514827] do_syscall_64+0x3f/0x90 [ 31.515298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.515936] [ 31.516149] Second to last potentially related work creation: [ 31.516832] kasan_save_stack+0x22/0x50 [ 31.517359] __kasan_record_aux_stack+0x8e/0xa0 [ 31.517932] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.518572] remove_vma+0x139/0x170 [ 31.519023] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.519581] do_vmi_munmap+0x1f1/0x2b0 [ 31.520063] mmap_region+0x1f9/0x2660 [ 31.520541] do_mmap+0x854/0xf00 [ 31.520973] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.521460] ksys_mmap_pgoff+0x3af/0x500 [ 31.521968] do_syscall_64+0x3f/0x90 [ 31.522445] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.523083] [ 31.523299] The buggy address belongs to the object at ffff88800ea6bbc8 [ 31.523299] which belongs to the cache vm_area_struct of size 168 [ 31.524759] The buggy address is located 88 bytes inside of [ 31.524759] freed 168-byte region [ffff88800ea6bbc8, ffff88800ea6bc70) [ 31.526156] [ 31.526392] The buggy address belongs to the physical page: [ 31.527082] page:00000000417f4a82 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea6b [ 31.528224] memcg:ffff88800ea78001 [ 31.528667] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.529344] page_type: 0xffffffff() [ 31.529798] raw: 0100000000000200 ffff8880087a0c80 ffffea000040d080 dead000000000006 [ 31.530724] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea78001 [ 31.531633] page dumped because: kasan: bad access detected [ 31.532322] [ 31.532541] Memory state around the buggy address: [ 31.533139] ffff88800ea6bb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.534052] ffff88800ea6bb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.534945] >ffff88800ea6bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.535796] ^ [ 31.536331] ffff88800ea6bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.537218] ffff88800ea6bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.538107] ================================================================== [ 31.539178] Disabling lock debugging due to kernel taint [ 33.480590] BUG: Bad rss-counter state mm:000000002cfdc89e type:MM_FILEPAGES val:33 [ 33.481539] BUG: Bad rss-counter state mm:000000002cfdc89e type:MM_ANONPAGES val:22 [ 34.046293] BUG: Bad rss-counter state mm:000000007127aa7c type:MM_FILEPAGES val:33 [ 34.047452] BUG: Bad rss-counter state mm:000000007127aa7c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34306' (ECDSA) to the list of known hosts. 2023/06/20 15:44:10 fuzzer started 2023/06/20 15:44:10 dialing manager at localhost:36067 2023/06/20 15:44:10 checking machine... 2023/06/20 15:44:10 checking revisions... [ 34.696373] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:44:10 testing simple program... [ 34.743506] cgroup: Unknown subsys name 'net' [ 34.804015] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:44:10 Registers: info registers vcpu 0 RAX=0000000000000019 RBX=00007ffc04f64bc0 RCX=00007fd99bf0e5c0 RDX=0000000100000000 RSI=00007ffc04f64a60 RDI=0000000000000019 RBP=00007ffc04f64cf0 RSP=00007ffc04f64a60 R8 =0000000000000000 R9 =00007ffc04f64bf0 R10=000000000000002b R11=0000000200000000 R12=0000000000000000 R13=0000000000000000 R14=000000000000002b R15=0000000000000000 RIP=00007fd99c6fca82 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd99bb71900 00000000 00000000 GS =0000 0000000000000000 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=00007fd99bb50020 CR3=000000000c956000 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=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=00007feb93f1f5a0 CR3=000000000e062000 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=2030313a34343a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a34343a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000