syzkaller login: [ 24.126682] BUG: Bad rss-counter state mm:00000000456f10db type:MM_FILEPAGES val:33 [ 24.128111] BUG: Bad rss-counter state mm:00000000456f10db type:MM_ANONPAGES val:22 [ 24.250284] ================================================================== [ 24.251202] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.252133] Read of size 8 at addr ffff88801b858058 by task sshd/219 [ 24.252893] [ 24.253120] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.254083] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.255046] Call Trace: [ 24.255362] [ 24.255734] dump_stack_lvl+0x91/0xf0 [ 24.256235] print_report+0xcc/0x620 [ 24.256723] ? __virt_addr_valid+0x102/0x340 [ 24.257280] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.257891] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.258501] kasan_report+0xbe/0xf0 [ 24.258968] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.259585] vma_interval_tree_remove+0xc75/0xec0 [ 24.260180] vma_prepare+0xc54/0x11a0 [ 24.260652] __split_vma+0x5af/0x950 [ 24.261120] ? __pfx___split_vma+0x10/0x10 [ 24.261650] ? find_held_lock+0x2c/0x110 [ 24.262162] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.262725] ? lock_is_held_type+0x9f/0x120 [ 24.263259] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.263861] ? mtree_range_walk+0x632/0x900 [ 24.264410] ? mas_walk+0x5c7/0x7c0 [ 24.264880] do_vmi_munmap+0x1f1/0x2b0 [ 24.265391] mmap_region+0x1f9/0x2660 [ 24.265874] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.266376] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.267095] ? __pfx_lock_acquire+0x10/0x10 [ 24.267615] ? __pfx_mmap_region+0x10/0x10 [ 24.268133] ? security_mmap_addr+0x7d/0xa0 [ 24.268680] ? get_unmapped_area+0x1f5/0x3f0 [ 24.269221] do_mmap+0x854/0xf00 [ 24.269667] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.270154] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.270715] ksys_mmap_pgoff+0x3af/0x500 [ 24.271218] do_syscall_64+0x3f/0x90 [ 24.271706] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.272347] RIP: 0033:0x7f1c467f4d82 [ 24.272800] 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 [ 24.274922] RSP: 002b:00007ffc009a05b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.275821] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1c467f4d82 [ 24.276651] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1c45c2e000 [ 24.277515] RBP: 00007f1c45c2e000 R08: 0000000000000009 R09: 0000000000001000 [ 24.278347] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a7b688cb20 [ 24.279184] R13: 00007ffc009a05d0 R14: 00007ffc009a0600 R15: 00007ffc009a0960 [ 24.280035] [ 24.280327] [ 24.280542] Allocated by task 212: [ 24.280968] kasan_save_stack+0x22/0x50 [ 24.281477] kasan_set_track+0x25/0x30 [ 24.281969] __kasan_slab_alloc+0x59/0x70 [ 24.282483] kmem_cache_alloc+0x16b/0x370 [ 24.282994] vm_area_dup+0x20/0x160 [ 24.283438] __split_vma+0x170/0x950 [ 24.283897] split_vma+0xc6/0x110 [ 24.284327] mprotect_fixup+0x8d2/0xb30 [ 24.284829] do_mprotect_pkey+0x87e/0xd40 [ 24.285355] __x64_sys_mprotect+0x78/0xc0 [ 24.285874] do_syscall_64+0x3f/0x90 [ 24.286341] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.286986] [ 24.287201] Freed by task 212: [ 24.287591] kasan_save_stack+0x22/0x50 [ 24.288084] kasan_set_track+0x25/0x30 [ 24.288571] kasan_save_free_info+0x2b/0x50 [ 24.289097] __kasan_slab_free+0x10a/0x190 [ 24.289652] kmem_cache_free+0x10d/0x4d0 [ 24.290161] rcu_core+0x8c8/0x2860 [ 24.290604] __do_softirq+0x1b7/0x7d4 [ 24.291080] [ 24.291291] Last potentially related work creation: [ 24.291868] kasan_save_stack+0x22/0x50 [ 24.292379] __kasan_record_aux_stack+0x8e/0xa0 [ 24.292952] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.293602] remove_vma+0x139/0x170 [ 24.294053] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.294610] do_vmi_munmap+0x1f1/0x2b0 [ 24.295089] __vm_munmap+0x138/0x3a0 [ 24.295555] __x64_sys_munmap+0x59/0x80 [ 24.296051] do_syscall_64+0x3f/0x90 [ 24.296524] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.297157] [ 24.297377] The buggy address belongs to the object at ffff88801b858000 [ 24.297377] which belongs to the cache vm_area_struct of size 168 [ 24.298828] The buggy address is located 88 bytes inside of [ 24.298828] freed 168-byte region [ffff88801b858000, ffff88801b8580a8) [ 24.300212] [ 24.300425] The buggy address belongs to the physical page: [ 24.301072] page:0000000063dba757 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b858 [ 24.302173] memcg:ffff88800d10ea01 [ 24.302599] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.303232] page_type: 0xffffffff() [ 24.303676] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.304586] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d10ea01 [ 24.305489] page dumped because: kasan: bad access detected [ 24.306137] [ 24.306353] Memory state around the buggy address: [ 24.306928] ffff88801b857f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 24.307766] ffff88801b857f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.308607] >ffff88801b858000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.309469] ^ [ 24.310183] ffff88801b858080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 24.311023] ffff88801b858100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.311860] ================================================================== [ 24.312963] Disabling lock debugging due to kernel taint [ 26.484444] BUG: Bad rss-counter state mm:00000000a46ad184 type:MM_FILEPAGES val:33 [ 26.485662] BUG: Bad rss-counter state mm:00000000a46ad184 type:MM_ANONPAGES val:22 [ 26.947322] BUG: Bad rss-counter state mm:00000000c29a7161 type:MM_FILEPAGES val:33 [ 26.948970] BUG: Bad rss-counter state mm:00000000c29a7161 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52674' (ECDSA) to the list of known hosts. 2023/06/20 13:44:37 fuzzer started 2023/06/20 13:44:38 dialing manager at localhost:36067 2023/06/20 13:44:38 checking machine... 2023/06/20 13:44:38 checking revisions... [ 27.669083] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:44:38 testing simple program... [ 27.720986] cgroup: Unknown subsys name 'net' [ 27.767092] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:44:37 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=00000000a19ea6e3 RCX=ffff88806cb53718 RDX=0000000000000012 RSI=0000000000000003 RDI=000000009a040e0a RBP=ffff88800d7a1200 RSP=ffff888016a978b8 R8 =00000000d4c62adc R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000092cc0 R14=ffff888016a97920 R15=0000000000000012 RIP=ffffffff822704d3 RFL=00000202 [-------] 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 00007f96f777a900 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=00007f96f7d320b0 CR3=000000000ef30000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000004 RBX=0000000000000004 RCX=0000000000000000 RDX=00000000000101f5 RSI=ffffffff82191d98 RDI=0000000000000007 RBP=ffff8880094f01a0 RSP=ffff88800ba6f7a0 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f5 R11=0000000000000128 R12=00000000000101f5 R13=ffff8880094f0050 R14=ffff8880094f0048 R15=ffff8880094f0060 RIP=ffffffff82191d9e RFL=00000093 [--S-A-C] 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 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=00007ffd2f8113e8 CR3=000000001a42e000 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=2037333a34343a3331203032206e754a XMM01=6964206465766965636552203a5d3832 XMM02=6f63736964203a31313a363433353520 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a34343a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000