syzkaller login: [ 30.260798] BUG: Bad rss-counter state mm:0000000063d30844 type:MM_FILEPAGES val:33 [ 30.262018] BUG: Bad rss-counter state mm:0000000063d30844 type:MM_ANONPAGES val:22 [ 30.308757] ================================================================== [ 30.309774] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.310712] Read of size 8 at addr ffff88800fc673f8 by task sshd/221 [ 30.311470] [ 30.311689] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.312551] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.313557] Call Trace: [ 30.313875] [ 30.314161] dump_stack_lvl+0x91/0xf0 [ 30.314650] print_report+0xcc/0x620 [ 30.315131] ? __virt_addr_valid+0x102/0x340 [ 30.315675] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.316292] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.316900] kasan_report+0xbe/0xf0 [ 30.317396] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.318017] vma_interval_tree_remove+0xc75/0xec0 [ 30.318628] vma_prepare+0xc54/0x11a0 [ 30.319109] __split_vma+0x5af/0x950 [ 30.319579] ? __pfx___split_vma+0x10/0x10 [ 30.320127] ? find_held_lock+0x2c/0x110 [ 30.320647] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.321226] ? lock_is_held_type+0x9f/0x120 [ 30.321772] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.322379] ? mtree_range_walk+0x632/0x900 [ 30.322938] ? mas_walk+0x5c7/0x7c0 [ 30.323416] do_vmi_munmap+0x1f1/0x2b0 [ 30.323919] mmap_region+0x1f9/0x2660 [ 30.324411] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.324929] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.325658] ? __pfx_lock_acquire+0x10/0x10 [ 30.326194] ? __pfx_mmap_region+0x10/0x10 [ 30.326728] ? security_mmap_addr+0x7d/0xa0 [ 30.327264] ? get_unmapped_area+0x1f5/0x3f0 [ 30.327821] do_mmap+0x854/0xf00 [ 30.328255] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.328747] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.329327] ksys_mmap_pgoff+0x3af/0x500 [ 30.329834] do_syscall_64+0x3f/0x90 [ 30.330316] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.330968] RIP: 0033:0x7fddf35d9d82 [ 30.331429] 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 [ 30.333561] RSP: 002b:00007ffc588f1da8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.334470] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fddf35d9d82 [ 30.335324] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fddf2a13000 [ 30.336172] RBP: 00007fddf2a13000 R08: 0000000000000009 R09: 0000000000001000 [ 30.337046] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559d1d523ec0 [ 30.337926] R13: 00007ffc588f1dc0 R14: 00007ffc588f1df0 R15: 00007ffc588f2150 [ 30.338793] [ 30.339084] [ 30.339299] Allocated by task 214: [ 30.339726] kasan_save_stack+0x22/0x50 [ 30.340227] kasan_set_track+0x25/0x30 [ 30.340720] __kasan_slab_alloc+0x59/0x70 [ 30.341254] kmem_cache_alloc+0x16b/0x370 [ 30.341779] vm_area_dup+0x20/0x160 [ 30.342230] __split_vma+0x170/0x950 [ 30.342695] split_vma+0xc6/0x110 [ 30.343129] mprotect_fixup+0x8d2/0xb30 [ 30.343629] do_mprotect_pkey+0x87e/0xd40 [ 30.344150] __x64_sys_mprotect+0x78/0xc0 [ 30.344668] do_syscall_64+0x3f/0x90 [ 30.345145] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.345795] [ 30.346017] Freed by task 214: [ 30.346407] kasan_save_stack+0x22/0x50 [ 30.346910] kasan_set_track+0x25/0x30 [ 30.347406] kasan_save_free_info+0x2b/0x50 [ 30.347942] __kasan_slab_free+0x10a/0x190 [ 30.348472] kmem_cache_free+0x10d/0x4d0 [ 30.348980] rcu_core+0x8c8/0x2860 [ 30.349446] __do_softirq+0x1b7/0x7d4 [ 30.349926] [ 30.350144] Last potentially related work creation: [ 30.350729] kasan_save_stack+0x22/0x50 [ 30.351228] __kasan_record_aux_stack+0x8e/0xa0 [ 30.351794] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.352428] remove_vma+0x139/0x170 [ 30.352873] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.353439] do_vmi_munmap+0x1f1/0x2b0 [ 30.353928] __vm_munmap+0x138/0x3a0 [ 30.354409] __x64_sys_munmap+0x59/0x80 [ 30.354913] do_syscall_64+0x3f/0x90 [ 30.355388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.356024] [ 30.356239] The buggy address belongs to the object at ffff88800fc673a0 [ 30.356239] which belongs to the cache vm_area_struct of size 168 [ 30.357722] The buggy address is located 88 bytes inside of [ 30.357722] freed 168-byte region [ffff88800fc673a0, ffff88800fc67448) [ 30.359123] [ 30.359340] The buggy address belongs to the physical page: [ 30.359997] page:000000001f1d85fe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc67 [ 30.361089] memcg:ffff8880096a7001 [ 30.361721] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.362521] page_type: 0xffffffff() [ 30.363073] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.364188] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880096a7001 [ 30.365334] page dumped because: kasan: bad access detected [ 30.366147] [ 30.366411] Memory state around the buggy address: [ 30.367115] ffff88800fc67280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.368161] ffff88800fc67300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.369192] >ffff88800fc67380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.370245] ^ [ 30.371270] ffff88800fc67400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.372321] ffff88800fc67480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.373368] ================================================================== [ 30.375114] Disabling lock debugging due to kernel taint [ 32.904631] BUG: Bad rss-counter state mm:00000000d5b78007 type:MM_FILEPAGES val:33 [ 32.906234] BUG: Bad rss-counter state mm:00000000d5b78007 type:MM_ANONPAGES val:22 [ 33.399342] BUG: Bad rss-counter state mm:000000002f0aa0e5 type:MM_FILEPAGES val:33 [ 33.400941] BUG: Bad rss-counter state mm:000000002f0aa0e5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56169' (ECDSA) to the list of known hosts. 2023/06/21 01:00:55 fuzzer started 2023/06/21 01:00:56 dialing manager at localhost:36067 2023/06/21 01:00:56 checking machine... 2023/06/21 01:00:56 checking revisions... [ 34.167033] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:00:56 testing simple program... [ 34.224451] cgroup: Unknown subsys name 'net' [ 34.269063] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:00:55 Registers: info registers vcpu 0 RAX=ffffffff84601286 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002b06e98 RSI=ffffffff84601286 RDI=ffff888015837530 RBP=ffff888015837500 RSP=ffff888015837460 R8 =0000000000000001 R9 =ffff8880158374a8 R10=0000000000038001 R11=00000000000b5365 R12=ffff888015837530 R13=0000000000000000 R14=ffff88800f571b40 R15=0000000000092c40 RIP=ffffffff813ad474 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0fff6ff900 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=00007f0ffeaf2de0 CR3=000000000d514000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=7fbe77c7f4c8d70100000000000ae988 XMM05=b683a55258f5f85500000000001327b0 XMM06=c291bd5c70af25b900000000001315a0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff86138e8c RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86138e90 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09de8 R15=ffff88806cf09a98 RIP=ffffffff81131151 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe1168de900 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=00007ffd43fbce1c CR3=000000001bc54000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=153f5120358c89a20596c290642ecd6c XMM05=00000000000000000000000000000000 XMM06=153f51203575733d05657220642e733d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000