syzkaller login: [ 42.095893] BUG: Bad rss-counter state mm:000000006ddfe2cc type:MM_FILEPAGES val:33 [ 42.097339] BUG: Bad rss-counter state mm:000000006ddfe2cc type:MM_ANONPAGES val:22 [ 42.253934] ================================================================== [ 42.254926] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.255889] Read of size 8 at addr ffff88800db205c8 by task sshd/220 [ 42.256768] [ 42.256984] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.257840] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.258824] Call Trace: [ 42.259145] [ 42.259441] dump_stack_lvl+0x91/0xf0 [ 42.259926] print_report+0xcc/0x620 [ 42.260414] ? __virt_addr_valid+0x102/0x340 [ 42.260993] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.261606] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.262221] kasan_report+0xbe/0xf0 [ 42.262696] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.263317] vma_interval_tree_remove+0xc75/0xec0 [ 42.263930] vma_prepare+0xc54/0x11a0 [ 42.264416] __split_vma+0x5af/0x950 [ 42.264899] ? __pfx___split_vma+0x10/0x10 [ 42.265434] ? find_held_lock+0x2c/0x110 [ 42.265966] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.266542] ? lock_is_held_type+0x9f/0x120 [ 42.267081] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.267691] ? mtree_range_walk+0x632/0x900 [ 42.268237] ? mas_walk+0x5c7/0x7c0 [ 42.268722] do_vmi_munmap+0x1f1/0x2b0 [ 42.269215] mmap_region+0x1f9/0x2660 [ 42.269701] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.270210] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.270917] ? __pfx_lock_acquire+0x10/0x10 [ 42.271466] ? __pfx_mmap_region+0x10/0x10 [ 42.272007] ? security_mmap_addr+0x7d/0xa0 [ 42.272533] ? get_unmapped_area+0x1f5/0x3f0 [ 42.273100] do_mmap+0x854/0xf00 [ 42.273550] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.274044] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.274605] ksys_mmap_pgoff+0x3af/0x500 [ 42.275115] do_syscall_64+0x3f/0x90 [ 42.275595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.276234] RIP: 0033:0x7fe683339d82 [ 42.276693] 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 [ 42.278813] RSP: 002b:00007ffe297025b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.279725] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe683339d82 [ 42.280584] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe682773000 [ 42.281439] RBP: 00007fe682773000 R08: 0000000000000009 R09: 0000000000001000 [ 42.282294] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557816e3fec0 [ 42.283138] R13: 00007ffe297025d0 R14: 00007ffe29702600 R15: 00007ffe29702960 [ 42.283989] [ 42.284281] [ 42.284497] Allocated by task 213: [ 42.284940] kasan_save_stack+0x22/0x50 [ 42.285455] kasan_set_track+0x25/0x30 [ 42.285944] __kasan_slab_alloc+0x59/0x70 [ 42.286462] kmem_cache_alloc+0x16b/0x370 [ 42.286976] vm_area_dup+0x20/0x160 [ 42.287430] __split_vma+0x170/0x950 [ 42.287896] split_vma+0xc6/0x110 [ 42.288338] mprotect_fixup+0x8d2/0xb30 [ 42.288846] do_mprotect_pkey+0x87e/0xd40 [ 42.289368] __x64_sys_mprotect+0x78/0xc0 [ 42.289892] do_syscall_64+0x3f/0x90 [ 42.290364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.291001] [ 42.291217] Freed by task 213: [ 42.291608] kasan_save_stack+0x22/0x50 [ 42.292111] kasan_set_track+0x25/0x30 [ 42.292601] kasan_save_free_info+0x2b/0x50 [ 42.293154] __kasan_slab_free+0x10a/0x190 [ 42.293682] kmem_cache_free+0x10d/0x4d0 [ 42.294188] rcu_core+0x8c8/0x2860 [ 42.294638] __do_softirq+0x1b7/0x7d4 [ 42.295118] [ 42.295334] Last potentially related work creation: [ 42.295922] kasan_save_stack+0x22/0x50 [ 42.296423] __kasan_record_aux_stack+0x8e/0xa0 [ 42.297002] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.297642] remove_vma+0x139/0x170 [ 42.298095] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.298655] do_vmi_munmap+0x1f1/0x2b0 [ 42.299141] __vm_munmap+0x138/0x3a0 [ 42.299608] __x64_sys_munmap+0x59/0x80 [ 42.300101] do_syscall_64+0x3f/0x90 [ 42.300572] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.301218] [ 42.301432] Second to last potentially related work creation: [ 42.302115] kasan_save_stack+0x22/0x50 [ 42.302619] __kasan_record_aux_stack+0x8e/0xa0 [ 42.303194] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.303832] remove_vma+0x139/0x170 [ 42.304283] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.304879] do_vmi_munmap+0x1f1/0x2b0 [ 42.305373] __vm_munmap+0x138/0x3a0 [ 42.305843] elf_map+0x26f/0x310 [ 42.306290] load_elf_binary+0x3417/0x5030 [ 42.306828] bprm_execve+0x803/0x1940 [ 42.307300] do_execveat_common+0x734/0x8e0 [ 42.307832] __x64_sys_execve+0x93/0xc0 [ 42.308319] do_syscall_64+0x3f/0x90 [ 42.308804] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.309448] [ 42.309662] The buggy address belongs to the object at ffff88800db20570 [ 42.309662] which belongs to the cache vm_area_struct of size 168 [ 42.311152] The buggy address is located 88 bytes inside of [ 42.311152] freed 168-byte region [ffff88800db20570, ffff88800db20618) [ 42.312542] [ 42.312770] The buggy address belongs to the physical page: [ 42.313428] page:00000000de17332a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb20 [ 42.314517] memcg:ffff88800d94ca01 [ 42.314941] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.315582] page_type: 0xffffffff() [ 42.316030] raw: 0100000000000200 ffff88800879fc80 ffffea0000386480 dead000000000002 [ 42.316957] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d94ca01 [ 42.317867] page dumped because: kasan: bad access detected [ 42.318531] [ 42.318747] Memory state around the buggy address: [ 42.319321] ffff88800db20480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.320174] ffff88800db20500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 42.321043] >ffff88800db20580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.321899] ^ [ 42.322573] ffff88800db20600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 42.323425] ffff88800db20680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.324271] ================================================================== [ 42.325391] Disabling lock debugging due to kernel taint [ 44.223948] BUG: Bad rss-counter state mm:000000002a74ea2f type:MM_FILEPAGES val:33 [ 44.224987] BUG: Bad rss-counter state mm:000000002a74ea2f type:MM_ANONPAGES val:22 [ 44.743304] BUG: Bad rss-counter state mm:00000000fcd04d05 type:MM_FILEPAGES val:33 [ 44.744363] BUG: Bad rss-counter state mm:00000000fcd04d05 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31248' (ECDSA) to the list of known hosts. 2023/06/19 17:39:31 fuzzer started 2023/06/19 17:39:31 dialing manager at localhost:44161 2023/06/19 17:39:31 checking machine... 2023/06/19 17:39:31 checking revisions... [ 45.478584] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:39:31 testing simple program... [ 45.519558] cgroup: Unknown subsys name 'net' [ 45.561390] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:39:27 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff856528e0 RCX=0000000000000100 RDX=ffff8880166d51c0 RSI=ffffffff814c842f RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09a20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007f3a29a7fdad R13=0000000000000000 R14=ffff8880166d51c0 R15=ffff88800d625a00 RIP=ffffffff84532a40 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 00007f3a2943d700 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=00007f800a53ea00 CR3=000000000d810000 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=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363835 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000000b523e RBX=0000000000000002 RCX=ffffffff8450b05d RDX=00000000000b524f RSI=00000000000350b0 RDI=ffffffff865bbe84 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000000 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b523e R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130837 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 00007f0b37d4e900 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=00007ffc93312000 CR3=0000000016b64000 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