syzkaller login: [ 31.034085] BUG: Bad rss-counter state mm:00000000e7a04ccb type:MM_FILEPAGES val:33 [ 31.035079] BUG: Bad rss-counter state mm:00000000e7a04ccb type:MM_ANONPAGES val:22 [ 31.209050] ================================================================== [ 31.209960] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.210893] Read of size 8 at addr ffff88801b0335c8 by task sshd/220 [ 31.211755] [ 31.211972] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.212854] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.213835] Call Trace: [ 31.214155] [ 31.214445] dump_stack_lvl+0x91/0xf0 [ 31.214946] print_report+0xcc/0x620 [ 31.215436] ? __virt_addr_valid+0x102/0x340 [ 31.215984] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.216599] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.217234] kasan_report+0xbe/0xf0 [ 31.217708] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.218327] vma_interval_tree_remove+0xc75/0xec0 [ 31.218929] vma_prepare+0xc54/0x11a0 [ 31.219407] __split_vma+0x5af/0x950 [ 31.219882] ? __pfx___split_vma+0x10/0x10 [ 31.220404] ? find_held_lock+0x2c/0x110 [ 31.220954] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.221515] ? lock_is_held_type+0x9f/0x120 [ 31.222050] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.222661] ? mtree_range_walk+0x632/0x900 [ 31.223211] ? mas_walk+0x5c7/0x7c0 [ 31.223685] do_vmi_munmap+0x1f1/0x2b0 [ 31.224176] mmap_region+0x1f9/0x2660 [ 31.224655] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.225172] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.225884] ? __pfx_lock_acquire+0x10/0x10 [ 31.226414] ? __pfx_mmap_region+0x10/0x10 [ 31.226945] ? security_mmap_addr+0x7d/0xa0 [ 31.227473] ? get_unmapped_area+0x1f5/0x3f0 [ 31.228019] do_mmap+0x854/0xf00 [ 31.228459] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.228973] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.229535] ksys_mmap_pgoff+0x3af/0x500 [ 31.230041] do_syscall_64+0x3f/0x90 [ 31.230519] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.231162] RIP: 0033:0x7fb1f32c3d82 [ 31.231621] 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 [ 31.233754] RSP: 002b:00007ffe019ca308 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.234652] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb1f32c3d82 [ 31.235501] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb1f26fd000 [ 31.236344] RBP: 00007fb1f26fd000 R08: 0000000000000009 R09: 0000000000001000 [ 31.237208] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557897bafec0 [ 31.238054] R13: 00007ffe019ca320 R14: 00007ffe019ca350 R15: 00007ffe019ca6b0 [ 31.238904] [ 31.239195] [ 31.239409] Allocated by task 213: [ 31.239839] kasan_save_stack+0x22/0x50 [ 31.240342] kasan_set_track+0x25/0x30 [ 31.240841] __kasan_slab_alloc+0x59/0x70 [ 31.241365] kmem_cache_alloc+0x16b/0x370 [ 31.241882] vm_area_dup+0x20/0x160 [ 31.242340] __split_vma+0x170/0x950 [ 31.242806] split_vma+0xc6/0x110 [ 31.243238] mprotect_fixup+0x8d2/0xb30 [ 31.243742] do_mprotect_pkey+0x87e/0xd40 [ 31.244269] __x64_sys_mprotect+0x78/0xc0 [ 31.244808] do_syscall_64+0x3f/0x90 [ 31.245286] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.245930] [ 31.246144] Freed by task 213: [ 31.246544] kasan_save_stack+0x22/0x50 [ 31.247045] kasan_set_track+0x25/0x30 [ 31.247536] kasan_save_free_info+0x2b/0x50 [ 31.248067] __kasan_slab_free+0x10a/0x190 [ 31.248599] kmem_cache_free+0x10d/0x4d0 [ 31.249118] rcu_core+0x8c8/0x2860 [ 31.249562] __do_softirq+0x1b7/0x7d4 [ 31.250043] [ 31.250265] Last potentially related work creation: [ 31.250844] kasan_save_stack+0x22/0x50 [ 31.251350] __kasan_record_aux_stack+0x8e/0xa0 [ 31.251938] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.252579] remove_vma+0x139/0x170 [ 31.253037] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.253609] do_vmi_munmap+0x1f1/0x2b0 [ 31.254088] __vm_munmap+0x138/0x3a0 [ 31.254556] __x64_sys_munmap+0x59/0x80 [ 31.255047] do_syscall_64+0x3f/0x90 [ 31.255521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.256162] [ 31.256377] The buggy address belongs to the object at ffff88801b033570 [ 31.256377] which belongs to the cache vm_area_struct of size 168 [ 31.257879] The buggy address is located 88 bytes inside of [ 31.257879] freed 168-byte region [ffff88801b033570, ffff88801b033618) [ 31.259296] [ 31.259514] The buggy address belongs to the physical page: [ 31.260173] page:00000000526e21eb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b033 [ 31.261280] memcg:ffff88800e7e9701 [ 31.261708] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.262352] page_type: 0xffffffff() [ 31.262804] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.263717] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7e9701 [ 31.264618] page dumped because: kasan: bad access detected [ 31.265291] [ 31.265505] Memory state around the buggy address: [ 31.266081] ffff88801b033480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.266938] ffff88801b033500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.267790] >ffff88801b033580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.268650] ^ [ 31.269322] ffff88801b033600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.270176] ffff88801b033680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.271029] ================================================================== [ 31.272137] Disabling lock debugging due to kernel taint [ 32.968649] BUG: Bad rss-counter state mm:00000000f25de9b6 type:MM_FILEPAGES val:33 [ 32.970024] BUG: Bad rss-counter state mm:00000000f25de9b6 type:MM_ANONPAGES val:22 [ 33.362700] BUG: Bad rss-counter state mm:000000007afb290c type:MM_FILEPAGES val:33 [ 33.364232] BUG: Bad rss-counter state mm:000000007afb290c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49302' (ECDSA) to the list of known hosts. 2023/06/21 02:31:03 fuzzer started 2023/06/21 02:31:03 dialing manager at localhost:36067 2023/06/21 02:31:03 checking machine... 2023/06/21 02:31:03 checking revisions... [ 34.058164] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:31:03 testing simple program... [ 34.101204] cgroup: Unknown subsys name 'net' [ 34.145091] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:31:02 Registers: info registers vcpu 0 RAX=ffffffff8605534c RBX=ffffffff8605534c RCX=ffffffff846000a9 RDX=0000000000000000 RSI=ffffffff864bbb4e RDI=ffffffff86055348 RBP=ffffffff8605534c RSP=ffff88806ce099e0 R8 =ffffffff864bbb4e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b6a61 R12=ffffffff8605534c R13=ffffffff86055348 R14=ffffffff86055348 R15=dffffc0000000000 RIP=ffffffff8112fc76 RFL=00000256 [---ZAP-] 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 00007f4288b13900 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=00007f4288af2020 CR3=000000000e4ec000 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=00007f3da9e0dcb0 CR3=000000000fe2e000 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=31333a3230203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383435 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000