syzkaller login: [ 98.304198] BUG: Bad rss-counter state mm:000000008ece375d type:MM_FILEPAGES val:33 [ 98.305818] BUG: Bad rss-counter state mm:000000008ece375d type:MM_ANONPAGES val:22 [ 98.468604] ================================================================== [ 98.469689] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 98.471007] Read of size 8 at addr ffff88800da9cb38 by task sshd/219 [ 98.471848] [ 98.472070] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 98.473117] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 98.474099] Call Trace: [ 98.474423] [ 98.474710] dump_stack_lvl+0x91/0xf0 [ 98.475208] print_report+0xcc/0x620 [ 98.475740] ? __virt_addr_valid+0x102/0x340 [ 98.476292] ? vma_interval_tree_remove+0xc75/0xec0 [ 98.476911] ? vma_interval_tree_remove+0xc75/0xec0 [ 98.477535] kasan_report+0xbe/0xf0 [ 98.478005] ? vma_interval_tree_remove+0xc75/0xec0 [ 98.478625] vma_interval_tree_remove+0xc75/0xec0 [ 98.479231] vma_prepare+0xc54/0x11a0 [ 98.479714] __split_vma+0x5af/0x950 [ 98.480198] ? __pfx___split_vma+0x10/0x10 [ 98.480737] ? find_held_lock+0x2c/0x110 [ 98.481269] do_vmi_align_munmap+0x2ba/0x11f0 [ 98.481841] ? lock_is_held_type+0x9f/0x120 [ 98.482380] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 98.483005] ? mtree_range_walk+0x632/0x900 [ 98.483563] ? mas_walk+0x5c7/0x7c0 [ 98.484041] do_vmi_munmap+0x1f1/0x2b0 [ 98.484548] mmap_region+0x1f9/0x2660 [ 98.485029] ? vm_mmap_pgoff+0x15c/0x3a0 [ 98.485548] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 98.486260] ? __pfx_lock_acquire+0x10/0x10 [ 98.486818] ? __pfx_mmap_region+0x10/0x10 [ 98.487349] ? security_mmap_addr+0x7d/0xa0 [ 98.487954] ? get_unmapped_area+0x1f5/0x3f0 [ 98.488616] do_mmap+0x854/0xf00 [ 98.489131] vm_mmap_pgoff+0x1a6/0x3a0 [ 98.489721] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 98.490383] ksys_mmap_pgoff+0x3af/0x500 [ 98.491009] do_syscall_64+0x3f/0x90 [ 98.491565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 98.492320] RIP: 0033:0x7fed51c33d82 [ 98.492855] 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 [ 98.495394] RSP: 002b:00007ffd2d3dd6c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 98.496469] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fed51c33d82 [ 98.497488] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fed5106d000 [ 98.498499] RBP: 00007fed5106d000 R08: 0000000000000009 R09: 0000000000001000 [ 98.499519] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563ea9533d90 [ 98.500517] R13: 00007ffd2d3dd6e0 R14: 00007ffd2d3dd710 R15: 00007ffd2d3dda70 [ 98.501525] [ 98.501872] [ 98.502131] Allocated by task 212: [ 98.502640] kasan_save_stack+0x22/0x50 [ 98.503247] kasan_set_track+0x25/0x30 [ 98.503831] __kasan_slab_alloc+0x59/0x70 [ 98.504450] kmem_cache_alloc+0x16b/0x370 [ 98.505060] vm_area_dup+0x20/0x160 [ 98.505595] __split_vma+0x170/0x950 [ 98.506147] split_vma+0xc6/0x110 [ 98.506668] mprotect_fixup+0x8d2/0xb30 [ 98.507284] do_mprotect_pkey+0x87e/0xd40 [ 98.507899] __x64_sys_mprotect+0x78/0xc0 [ 98.508518] do_syscall_64+0x3f/0x90 [ 98.509080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 98.509836] [ 98.510094] Freed by task 212: [ 98.510570] kasan_save_stack+0x22/0x50 [ 98.511177] kasan_set_track+0x25/0x30 [ 98.511771] kasan_save_free_info+0x2b/0x50 [ 98.512408] __kasan_slab_free+0x10a/0x190 [ 98.513046] kmem_cache_free+0x10d/0x4d0 [ 98.513656] rcu_core+0x8c8/0x2860 [ 98.514177] __do_softirq+0x1b7/0x7d4 [ 98.514750] [ 98.515015] Last potentially related work creation: [ 98.515712] kasan_save_stack+0x22/0x50 [ 98.516311] __kasan_record_aux_stack+0x8e/0xa0 [ 98.516992] __call_rcu_common.constprop.0+0x6a/0xb90 [ 98.517755] remove_vma+0x139/0x170 [ 98.518291] do_vmi_align_munmap+0xd4a/0x11f0 [ 98.518977] do_vmi_munmap+0x1f1/0x2b0 [ 98.519554] __vm_munmap+0x138/0x3a0 [ 98.520106] __x64_sys_munmap+0x59/0x80 [ 98.520700] do_syscall_64+0x3f/0x90 [ 98.521263] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 98.522022] [ 98.522284] Second to last potentially related work creation: [ 98.523102] kasan_save_stack+0x22/0x50 [ 98.523693] __kasan_record_aux_stack+0x8e/0xa0 [ 98.524381] __call_rcu_common.constprop.0+0x6a/0xb90 [ 98.525146] remove_vma+0x139/0x170 [ 98.525679] do_vmi_align_munmap+0xd4a/0x11f0 [ 98.526341] do_vmi_munmap+0x1f1/0x2b0 [ 98.526922] mmap_region+0x1f9/0x2660 [ 98.527484] do_mmap+0x854/0xf00 [ 98.528000] vm_mmap_pgoff+0x1a6/0x3a0 [ 98.528585] ksys_mmap_pgoff+0x3af/0x500 [ 98.529184] do_syscall_64+0x3f/0x90 [ 98.529746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 98.530506] [ 98.530765] The buggy address belongs to the object at ffff88800da9cae0 [ 98.530765] which belongs to the cache vm_area_struct of size 168 [ 98.532536] The buggy address is located 88 bytes inside of [ 98.532536] freed 168-byte region [ffff88800da9cae0, ffff88800da9cb88) [ 98.534180] [ 98.534433] The buggy address belongs to the physical page: [ 98.535203] page:000000003f1f137d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda9c [ 98.536466] memcg:ffff88800e4ad501 [ 98.536959] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 98.537765] page_type: 0xffffffff() [ 98.538296] raw: 0100000000000200 ffff88800879fc80 ffffea000039ac00 dead000000000007 [ 98.539372] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4ad501 [ 98.540429] page dumped because: kasan: bad access detected [ 98.541206] [ 98.541458] Memory state around the buggy address: [ 98.542137] ffff88800da9ca00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 98.543154] ffff88800da9ca80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 98.544144] >ffff88800da9cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 98.545122] ^ [ 98.545832] ffff88800da9cb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 98.546839] ffff88800da9cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 98.547827] ================================================================== [ 98.549212] Disabling lock debugging due to kernel taint [ 100.512274] BUG: Bad rss-counter state mm:00000000e8b9c8f4 type:MM_FILEPAGES val:33 [ 100.513473] BUG: Bad rss-counter state mm:00000000e8b9c8f4 type:MM_ANONPAGES val:22 [ 100.890097] BUG: Bad rss-counter state mm:0000000007644aff type:MM_FILEPAGES val:33 [ 100.891197] BUG: Bad rss-counter state mm:0000000007644aff type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55281' (ECDSA) to the list of known hosts. 2023/06/20 00:36:06 fuzzer started 2023/06/20 00:36:06 dialing manager at localhost:44161 2023/06/20 00:36:06 checking machine... 2023/06/20 00:36:06 checking revisions... [ 101.637958] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:36:06 testing simple program... [ 101.680523] cgroup: Unknown subsys name 'net' [ 101.741222] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:35:06 Registers: info registers vcpu 0 RAX=ffffffff8460144a RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff8460144a RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b523e R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff888016ad8c60 RIP=ffffffff813ad420 RFL=00000282 [--S----] 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 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=00007f5fdd610180 CR3=00000000167aa000 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=2035303a36333a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a36333a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800f1a7880 RBX=0000000000000008 RCX=0000000000000000 RDX=0000000000000010 RSI=ffff8880168dbe58 RDI=ffff88800f1a7880 RBP=0000000000000008 RSP=ffff88800f1a70d8 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000003 R11=ffff8880145db60c R12=ffff88800f1a7768 R13=0000000000000010 R14=ffff8880168dbe50 R15=0000000000000002 RIP=ffffffff8450d12a 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 00007f8ea6558900 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=00007f8ea6537020 CR3=000000000efc0000 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