syzkaller login: [ 24.093865] BUG: Bad rss-counter state mm:000000001029a0fa type:MM_FILEPAGES val:33 [ 24.095376] BUG: Bad rss-counter state mm:000000001029a0fa type:MM_ANONPAGES val:22 [ 24.139611] ================================================================== [ 24.140773] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.141885] Read of size 8 at addr ffff88800dc07058 by task sshd/219 [ 24.142790] [ 24.143046] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.144058] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.145098] Call Trace: [ 24.145437] [ 24.145724] dump_stack_lvl+0x91/0xf0 [ 24.146221] print_report+0xcc/0x620 [ 24.146719] ? __virt_addr_valid+0x102/0x340 [ 24.147275] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.147897] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.148517] kasan_report+0xbe/0xf0 [ 24.148990] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.149629] vma_interval_tree_remove+0xc75/0xec0 [ 24.150228] vma_prepare+0xc54/0x11a0 [ 24.150706] __split_vma+0x5af/0x950 [ 24.151174] ? __pfx___split_vma+0x10/0x10 [ 24.151699] ? find_held_lock+0x2c/0x110 [ 24.152217] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.152790] ? lock_is_held_type+0x9f/0x120 [ 24.153330] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.153940] ? mtree_range_walk+0x632/0x900 [ 24.154497] ? mas_walk+0x5c7/0x7c0 [ 24.154973] do_vmi_munmap+0x1f1/0x2b0 [ 24.155469] mmap_region+0x1f9/0x2660 [ 24.155960] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.156476] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.157193] ? __pfx_mmap_region+0x10/0x10 [ 24.157748] ? security_mmap_addr+0x7d/0xa0 [ 24.158280] ? get_unmapped_area+0x1f5/0x3f0 [ 24.158826] do_mmap+0x854/0xf00 [ 24.159263] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.159761] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.160323] ksys_mmap_pgoff+0x3af/0x500 [ 24.160837] do_syscall_64+0x3f/0x90 [ 24.161320] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.162023] RIP: 0033:0x7fadeed9fd82 [ 24.162481] 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 [ 24.164661] RSP: 002b:00007ffc72b2e608 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.165609] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fadeed9fd82 [ 24.166496] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fadee1d9000 [ 24.167357] RBP: 00007fadee1d9000 R08: 0000000000000009 R09: 0000000000001000 [ 24.168240] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559e7001b980 [ 24.169100] R13: 00007ffc72b2e620 R14: 00007ffc72b2e650 R15: 00007ffc72b2e9b0 [ 24.170010] [ 24.170307] [ 24.170525] Allocated by task 212: [ 24.170976] kasan_save_stack+0x22/0x50 [ 24.171481] kasan_set_track+0x25/0x30 [ 24.171992] __kasan_slab_alloc+0x59/0x70 [ 24.172513] kmem_cache_alloc+0x16b/0x370 [ 24.173042] vm_area_dup+0x20/0x160 [ 24.173517] __split_vma+0x170/0x950 [ 24.174059] split_vma+0xc6/0x110 [ 24.174502] mprotect_fixup+0x8d2/0xb30 [ 24.175018] do_mprotect_pkey+0x87e/0xd40 [ 24.175537] __x64_sys_mprotect+0x78/0xc0 [ 24.176079] do_syscall_64+0x3f/0x90 [ 24.176559] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.177222] [ 24.177461] Freed by task 212: [ 24.177891] kasan_save_stack+0x22/0x50 [ 24.178395] kasan_set_track+0x25/0x30 [ 24.178909] kasan_save_free_info+0x2b/0x50 [ 24.179443] __kasan_slab_free+0x10a/0x190 [ 24.180000] kmem_cache_free+0x10d/0x4d0 [ 24.180510] rcu_core+0x8c8/0x2860 [ 24.180972] __do_softirq+0x1b7/0x7d4 [ 24.181459] [ 24.181675] Last potentially related work creation: [ 24.182283] kasan_save_stack+0x22/0x50 [ 24.182802] __kasan_record_aux_stack+0x8e/0xa0 [ 24.183375] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.184033] remove_vma+0x139/0x170 [ 24.184485] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.185055] do_vmi_munmap+0x1f1/0x2b0 [ 24.185551] __vm_munmap+0x138/0x3a0 [ 24.186047] __x64_sys_munmap+0x59/0x80 [ 24.186543] do_syscall_64+0x3f/0x90 [ 24.187036] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.187684] [ 24.187918] The buggy address belongs to the object at ffff88800dc07000 [ 24.187918] which belongs to the cache vm_area_struct of size 168 [ 24.189415] The buggy address is located 88 bytes inside of [ 24.189415] freed 168-byte region [ffff88800dc07000, ffff88800dc070a8) [ 24.190864] [ 24.191080] The buggy address belongs to the physical page: [ 24.191762] page:000000003881d914 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc07 [ 24.192856] memcg:ffff88800ee7fa01 [ 24.193279] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.193969] page_type: 0xffffffff() [ 24.194419] raw: 0100000000000200 ffff8880087a0c80 ffffea0000370900 dead000000000004 [ 24.195361] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee7fa01 [ 24.196285] page dumped because: kasan: bad access detected [ 24.196956] [ 24.197172] Memory state around the buggy address: [ 24.197807] ffff88800dc06f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.198670] ffff88800dc06f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.199552] >ffff88800dc07000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.200425] ^ [ 24.201168] ffff88800dc07080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 24.202064] ffff88800dc07100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.202927] ================================================================== [ 24.203877] Disabling lock debugging due to kernel taint [ 26.219993] BUG: Bad rss-counter state mm:000000008aa92ab3 type:MM_FILEPAGES val:33 [ 26.221052] BUG: Bad rss-counter state mm:000000008aa92ab3 type:MM_ANONPAGES val:22 [ 26.678081] BUG: Bad rss-counter state mm:000000007d8fbaf3 type:MM_FILEPAGES val:33 [ 26.679055] BUG: Bad rss-counter state mm:000000007d8fbaf3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61338' (ECDSA) to the list of known hosts. 2023/06/20 12:28:47 fuzzer started 2023/06/20 12:28:47 dialing manager at localhost:36067 2023/06/20 12:28:47 checking machine... 2023/06/20 12:28:47 checking revisions... [ 27.444074] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:28:47 testing simple program... [ 27.490902] cgroup: Unknown subsys name 'net' [ 27.540247] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:28:46 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000040000003 RDI=00000000c000003e RBP=ffff8880147e7d28 RSP=ffff8880147e7c58 R8 =0000000000000004 R9 =000000007fff0000 R10=000000007fff0000 R11=0000000000000000 R12=0000000040000003 R13=ffff8880147e7d60 R14=00000000c000003e R15=ffffc90000655068 RIP=ffffffff814c0370 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 00007fed41d80900 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=00007fed4120ed80 CR3=000000000c5cc000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d43b3f7dc5b81af000000000000ae988 XMM05=692ecfb667da9bd70000000000132720 XMM06=806171799158d96700000000001311a0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888016b27c10 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff888016b27c00 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8e97 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 00007f335b00c900 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=00007fff52ec4000 CR3=000000000cc16000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000