syzkaller login: [ 30.210421] BUG: Bad rss-counter state mm:000000001d4a6633 type:MM_FILEPAGES val:33 [ 30.211459] BUG: Bad rss-counter state mm:000000001d4a6633 type:MM_ANONPAGES val:22 [ 30.368284] ================================================================== [ 30.369191] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.370127] Read of size 8 at addr ffff888015d86058 by task sshd/220 [ 30.370893] [ 30.371111] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.372175] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.373154] Call Trace: [ 30.373473] [ 30.373755] dump_stack_lvl+0x91/0xf0 [ 30.374259] print_report+0xcc/0x620 [ 30.374741] ? __virt_addr_valid+0x102/0x340 [ 30.375317] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.375943] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.376556] kasan_report+0xbe/0xf0 [ 30.377035] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.377655] vma_interval_tree_remove+0xc75/0xec0 [ 30.378251] vma_prepare+0xc54/0x11a0 [ 30.378729] __split_vma+0x5af/0x950 [ 30.379206] ? __pfx___split_vma+0x10/0x10 [ 30.379749] ? find_held_lock+0x2c/0x110 [ 30.380269] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.380866] ? lock_is_held_type+0x9f/0x120 [ 30.381430] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.382073] ? mtree_range_walk+0x632/0x900 [ 30.382664] ? mas_walk+0x5c7/0x7c0 [ 30.383170] do_vmi_munmap+0x1f1/0x2b0 [ 30.383716] mmap_region+0x1f9/0x2660 [ 30.384223] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.384769] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.385531] ? __pfx_lock_acquire+0x10/0x10 [ 30.386101] ? __pfx_mmap_region+0x10/0x10 [ 30.386665] ? security_mmap_addr+0x7d/0xa0 [ 30.387229] ? get_unmapped_area+0x1f5/0x3f0 [ 30.387843] do_mmap+0x854/0xf00 [ 30.388315] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.388815] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.389379] ksys_mmap_pgoff+0x3af/0x500 [ 30.389889] do_syscall_64+0x3f/0x90 [ 30.390367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.391009] RIP: 0033:0x7f4e775c0d82 [ 30.391472] 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 [ 30.393602] RSP: 002b:00007ffead76fb88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.394509] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4e775c0d82 [ 30.395367] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4e769fa000 [ 30.396213] RBP: 00007f4e769fa000 R08: 0000000000000009 R09: 0000000000001000 [ 30.397056] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558da3226ec0 [ 30.397902] R13: 00007ffead76fba0 R14: 00007ffead76fbd0 R15: 00007ffead76ff30 [ 30.398765] [ 30.399060] [ 30.399272] Allocated by task 213: [ 30.399720] kasan_save_stack+0x22/0x50 [ 30.400227] kasan_set_track+0x25/0x30 [ 30.400725] __kasan_slab_alloc+0x59/0x70 [ 30.401246] kmem_cache_alloc+0x16b/0x370 [ 30.401771] vm_area_dup+0x20/0x160 [ 30.402222] __split_vma+0x170/0x950 [ 30.402685] split_vma+0xc6/0x110 [ 30.403124] mprotect_fixup+0x8d2/0xb30 [ 30.403634] do_mprotect_pkey+0x87e/0xd40 [ 30.404154] __x64_sys_mprotect+0x78/0xc0 [ 30.404677] do_syscall_64+0x3f/0x90 [ 30.405152] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.405790] [ 30.406006] Freed by task 213: [ 30.406403] kasan_save_stack+0x22/0x50 [ 30.406905] kasan_set_track+0x25/0x30 [ 30.407409] kasan_save_free_info+0x2b/0x50 [ 30.407945] __kasan_slab_free+0x10a/0x190 [ 30.408477] kmem_cache_free+0x10d/0x4d0 [ 30.408985] rcu_core+0x8c8/0x2860 [ 30.409430] __do_softirq+0x1b7/0x7d4 [ 30.409910] [ 30.410129] Last potentially related work creation: [ 30.410712] kasan_save_stack+0x22/0x50 [ 30.411216] __kasan_record_aux_stack+0x8e/0xa0 [ 30.411805] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.412447] remove_vma+0x139/0x170 [ 30.412900] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.413518] do_vmi_munmap+0x1f1/0x2b0 [ 30.414005] __vm_munmap+0x138/0x3a0 [ 30.414473] __x64_sys_munmap+0x59/0x80 [ 30.414968] do_syscall_64+0x3f/0x90 [ 30.415449] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.416094] [ 30.416312] The buggy address belongs to the object at ffff888015d86000 [ 30.416312] which belongs to the cache vm_area_struct of size 168 [ 30.417786] The buggy address is located 88 bytes inside of [ 30.417786] freed 168-byte region [ffff888015d86000, ffff888015d860a8) [ 30.419211] [ 30.419441] The buggy address belongs to the physical page: [ 30.420126] page:0000000012b17eaf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15d86 [ 30.421233] memcg:ffff88800f065501 [ 30.421660] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.422316] page_type: 0xffffffff() [ 30.422771] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.423704] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f065501 [ 30.424627] page dumped because: kasan: bad access detected [ 30.425293] [ 30.425508] Memory state around the buggy address: [ 30.426098] ffff888015d85f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 30.426969] ffff888015d85f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.427858] >ffff888015d86000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.428713] ^ [ 30.429445] ffff888015d86080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.430304] ffff888015d86100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.431159] ================================================================== [ 30.432175] Disabling lock debugging due to kernel taint [ 32.733746] BUG: Bad rss-counter state mm:00000000a18a43a2 type:MM_FILEPAGES val:33 [ 32.734886] BUG: Bad rss-counter state mm:00000000a18a43a2 type:MM_ANONPAGES val:22 [ 33.203816] BUG: Bad rss-counter state mm:000000007f19cbe3 type:MM_FILEPAGES val:33 [ 33.204994] BUG: Bad rss-counter state mm:000000007f19cbe3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58353' (ECDSA) to the list of known hosts. 2023/06/21 10:33:40 fuzzer started 2023/06/21 10:33:41 dialing manager at localhost:36067 2023/06/21 10:33:41 checking machine... 2023/06/21 10:33:41 checking revisions... [ 33.897850] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:33:41 testing simple program... [ 33.943148] cgroup: Unknown subsys name 'net' [ 33.997771] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:33:40 Registers: info registers vcpu 0 RAX=1ffff1100323cf30 RBX=ffff8880191e7a10 RCX=ffff8880191e8000 RDX=0000000000000001 RSI=1ffff1100323cf31 RDI=ffff8880191e7928 RBP=dffffc0000000000 RSP=ffff8880191e7928 R8 =0000000000000000 R9 =0000000000000000 R10=ffff8880191e7978 R11=0000000000000000 R12=ffffed100323cf31 R13=ffffed100323cf30 R14=ffff8880191e79c0 R15=ffff8880191e7978 RIP=ffffffff81132faa 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 00007f0668a1e900 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=00007fff6d021000 CR3=0000000016742000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 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=00007fe235f36a20 CR3=000000000cbcc000 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=932d2d32b4f9e698d447b64d08b8da23 XMM02=ec2efd57dc4c00df000000000011bc08 XMM03=550c8300b6eebdf1000000000011bcd8 XMM04=3aded07fffc6801a00000000000ae988 XMM05=19e9129bd510f2350000000000132318 XMM06=cbf149f70e3086df0000000000131180 XMM07=e042d86d42eb936e00000000001227c0 XMM08=550c8300b6eebdf1000000000011bcd8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000