syzkaller login: [ 44.066805] BUG: Bad rss-counter state mm:000000000d558826 type:MM_FILEPAGES val:33 [ 44.067749] BUG: Bad rss-counter state mm:000000000d558826 type:MM_ANONPAGES val:22 [ 44.188783] ================================================================== [ 44.189480] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.190112] Read of size 8 at addr ffff88801653c310 by task sshd/220 [ 44.190642] [ 44.190785] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.191367] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.192074] Call Trace: [ 44.192298] [ 44.192498] dump_stack_lvl+0x91/0xf0 [ 44.192843] print_report+0xcc/0x620 [ 44.193326] ? __virt_addr_valid+0x102/0x340 [ 44.193695] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.194111] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.194524] kasan_report+0xbe/0xf0 [ 44.194828] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.195246] vma_interval_tree_remove+0xc75/0xec0 [ 44.195663] vma_prepare+0xc54/0x11a0 [ 44.195976] __split_vma+0x5af/0x950 [ 44.196322] ? __pfx___split_vma+0x10/0x10 [ 44.196677] ? find_held_lock+0x2c/0x110 [ 44.197031] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.197461] ? lock_is_held_type+0x9f/0x120 [ 44.197841] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.198248] ? mtree_range_walk+0x632/0x900 [ 44.198619] ? mas_walk+0x5c7/0x7c0 [ 44.198940] do_vmi_munmap+0x1f1/0x2b0 [ 44.199280] mmap_region+0x1f9/0x2660 [ 44.199636] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.199979] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.200492] ? __pfx_lock_acquire+0x10/0x10 [ 44.200862] ? __pfx_mmap_region+0x10/0x10 [ 44.201227] ? security_mmap_addr+0x7d/0xa0 [ 44.201589] ? get_unmapped_area+0x1f5/0x3f0 [ 44.201974] do_mmap+0x854/0xf00 [ 44.202279] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.202624] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.203034] ksys_mmap_pgoff+0x3af/0x500 [ 44.203396] do_syscall_64+0x3f/0x90 [ 44.203780] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.204251] RIP: 0033:0x7fb405fd5d82 [ 44.204591] 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 [ 44.206106] RSP: 002b:00007ffd849e2518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.206746] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb405fd5d82 [ 44.207377] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb40540f000 [ 44.207987] RBP: 00007fb40540f000 R08: 0000000000000009 R09: 0000000000001000 [ 44.208633] R10: 0000000000000812 R11: 0000000000000206 R12: 000056481b2a4b20 [ 44.209230] R13: 00007ffd849e2530 R14: 00007ffd849e2560 R15: 00007ffd849e28c0 [ 44.209843] [ 44.210064] [ 44.210216] Allocated by task 213: [ 44.210516] kasan_save_stack+0x22/0x50 [ 44.210883] kasan_set_track+0x25/0x30 [ 44.211241] __kasan_slab_alloc+0x59/0x70 [ 44.211668] kmem_cache_alloc+0x16b/0x370 [ 44.212058] vm_area_dup+0x20/0x160 [ 44.212381] __split_vma+0x170/0x950 [ 44.212719] split_vma+0xc6/0x110 [ 44.213025] mprotect_fixup+0x8d2/0xb30 [ 44.213380] do_mprotect_pkey+0x87e/0xd40 [ 44.213755] __x64_sys_mprotect+0x78/0xc0 [ 44.214131] do_syscall_64+0x3f/0x90 [ 44.214453] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.214904] [ 44.215065] Freed by task 204: [ 44.215338] kasan_save_stack+0x22/0x50 [ 44.215722] kasan_set_track+0x25/0x30 [ 44.216064] kasan_save_free_info+0x2b/0x50 [ 44.216463] __kasan_slab_free+0x10a/0x190 [ 44.216837] kmem_cache_free+0x10d/0x4d0 [ 44.217183] rcu_core+0x8c8/0x2860 [ 44.217547] __do_softirq+0x1b7/0x7d4 [ 44.217883] [ 44.218035] Last potentially related work creation: [ 44.218455] kasan_save_stack+0x22/0x50 [ 44.218811] __kasan_record_aux_stack+0x8e/0xa0 [ 44.219215] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.219688] remove_vma+0x139/0x170 [ 44.220006] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.220399] do_vmi_munmap+0x1f1/0x2b0 [ 44.220743] __vm_munmap+0x138/0x3a0 [ 44.221073] __x64_sys_munmap+0x59/0x80 [ 44.221424] do_syscall_64+0x3f/0x90 [ 44.221761] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.222211] [ 44.222360] The buggy address belongs to the object at ffff88801653c2b8 [ 44.222360] which belongs to the cache vm_area_struct of size 168 [ 44.223394] The buggy address is located 88 bytes inside of [ 44.223394] freed 168-byte region [ffff88801653c2b8, ffff88801653c360) [ 44.224404] [ 44.224561] The buggy address belongs to the physical page: [ 44.225024] page:00000000485e0e80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1653c [ 44.225782] memcg:ffff88800dd2ce01 [ 44.226082] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.226556] page_type: 0xffffffff() [ 44.226873] raw: 0100000000000200 ffff88800879fc80 ffffea00005ce480 dead000000000008 [ 44.227545] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd2ce01 [ 44.228204] page dumped because: kasan: bad access detected [ 44.228673] [ 44.228831] Memory state around the buggy address: [ 44.229247] ffff88801653c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 44.229854] ffff88801653c280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 44.230460] >ffff88801653c300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 44.231053] ^ [ 44.231380] ffff88801653c380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 44.231994] ffff88801653c400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 44.232595] ================================================================== [ 44.233468] Disabling lock debugging due to kernel taint [ 46.243200] BUG: Bad rss-counter state mm:00000000576d8097 type:MM_FILEPAGES val:33 [ 46.243959] BUG: Bad rss-counter state mm:00000000576d8097 type:MM_ANONPAGES val:22 [ 46.601956] BUG: Bad rss-counter state mm:00000000d7f6d12b type:MM_FILEPAGES val:33 [ 46.602615] BUG: Bad rss-counter state mm:00000000d7f6d12b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19811' (ECDSA) to the list of known hosts. 2023/06/20 09:43:57 fuzzer started 2023/06/20 09:43:58 dialing manager at localhost:44161 2023/06/20 09:43:58 checking machine... 2023/06/20 09:43:58 checking revisions... [ 47.212035] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:43:58 testing simple program... [ 47.248643] cgroup: Unknown subsys name 'net' [ 47.293631] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:43:52 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f0d85437163 RCX=ffffffff812d869a RDX=0000000000000000 RSI=00007f0d85437163 RDI=ffffffff856529e0 RBP=00007f0d85437163 RSP=ffff88800d6ef290 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800d6ef3a0 R13=0000000000000000 R14=ffff8880170b1b40 R15=00000000000928c0 RIP=ffffffff814c83d0 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 00007f0d84f44900 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=00007ffe3194c000 CR3=000000000e434000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fad68303580 CR3=000000000dc28000 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=e0430fd0a94ca493ba4ecead46821b5a XMM02=ec2efd57dc4c00df000000000011e770 XMM03=7f75a1a3aa0d4393000000000011e840 XMM04=580f97276c9db73800000000000ae988 XMM05=e4cb8bb95a7664b600000000001342c8 XMM06=9e7f5f8389f2179a00000000001334a0 XMM07=e042d86d42eb936e0000000000124ce0 XMM08=7f75a1a3aa0d4393000000000011e840 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000