syzkaller login: [ 34.189293] BUG: Bad rss-counter state mm:00000000386e95b8 type:MM_FILEPAGES val:33 [ 34.191085] BUG: Bad rss-counter state mm:00000000386e95b8 type:MM_ANONPAGES val:22 [ 34.366563] ================================================================== [ 34.367562] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.368613] Read of size 8 at addr ffff88801aeb1880 by task sshd/220 [ 34.369578] [ 34.369822] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.370812] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.371899] Call Trace: [ 34.372251] [ 34.372572] dump_stack_lvl+0x91/0xf0 [ 34.373116] print_report+0xcc/0x620 [ 34.373652] ? __virt_addr_valid+0x102/0x340 [ 34.374274] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.374971] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.375671] kasan_report+0xbe/0xf0 [ 34.376200] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.376885] vma_interval_tree_remove+0xc75/0xec0 [ 34.377549] vma_prepare+0xc54/0x11a0 [ 34.378092] __split_vma+0x5af/0x950 [ 34.378637] ? __pfx___split_vma+0x10/0x10 [ 34.379230] ? find_held_lock+0x2c/0x110 [ 34.379810] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.380443] ? lock_is_held_type+0x9f/0x120 [ 34.381040] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.381713] ? mtree_range_walk+0x632/0x900 [ 34.382345] ? mas_walk+0x5c7/0x7c0 [ 34.382882] do_vmi_munmap+0x1f1/0x2b0 [ 34.383432] mmap_region+0x1f9/0x2660 [ 34.383967] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.384536] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.385332] ? __pfx_lock_acquire+0x10/0x10 [ 34.385926] ? __pfx_mmap_region+0x10/0x10 [ 34.386536] ? security_mmap_addr+0x7d/0xa0 [ 34.387128] ? get_unmapped_area+0x1f5/0x3f0 [ 34.387758] do_mmap+0x854/0xf00 [ 34.388248] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.388813] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.389437] ksys_mmap_pgoff+0x3af/0x500 [ 34.390006] do_syscall_64+0x3f/0x90 [ 34.390551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.391280] RIP: 0033:0x7f22c3a91d82 [ 34.391793] 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 [ 34.394201] RSP: 002b:00007ffd14167ab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.395232] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f22c3a91d82 [ 34.396167] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f22c2ecb000 [ 34.397115] RBP: 00007f22c2ecb000 R08: 0000000000000009 R09: 0000000000001000 [ 34.398071] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a6ff50df70 [ 34.399027] R13: 00007ffd14167ad0 R14: 00007ffd14167b00 R15: 00007ffd14167e60 [ 34.399987] [ 34.400315] [ 34.400549] Allocated by task 213: [ 34.401023] kasan_save_stack+0x22/0x50 [ 34.401583] kasan_set_track+0x25/0x30 [ 34.402137] __kasan_slab_alloc+0x59/0x70 [ 34.402748] kmem_cache_alloc+0x16b/0x370 [ 34.403325] vm_area_dup+0x20/0x160 [ 34.403844] __split_vma+0x170/0x950 [ 34.404361] split_vma+0xc6/0x110 [ 34.404852] mprotect_fixup+0x8d2/0xb30 [ 34.405425] do_mprotect_pkey+0x87e/0xd40 [ 34.406006] __x64_sys_mprotect+0x78/0xc0 [ 34.406597] do_syscall_64+0x3f/0x90 [ 34.407133] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.407862] [ 34.408102] Freed by task 213: [ 34.408544] kasan_save_stack+0x22/0x50 [ 34.409111] kasan_set_track+0x25/0x30 [ 34.409675] kasan_save_free_info+0x2b/0x50 [ 34.410287] __kasan_slab_free+0x10a/0x190 [ 34.410889] kmem_cache_free+0x10d/0x4d0 [ 34.411455] rcu_core+0x8c8/0x2860 [ 34.411952] __do_softirq+0x1b7/0x7d4 [ 34.412477] [ 34.412716] Last potentially related work creation: [ 34.413372] kasan_save_stack+0x22/0x50 [ 34.413942] __kasan_record_aux_stack+0x8e/0xa0 [ 34.414601] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.415317] remove_vma+0x139/0x170 [ 34.415821] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.416439] do_vmi_munmap+0x1f1/0x2b0 [ 34.416990] __vm_munmap+0x138/0x3a0 [ 34.417516] __x64_sys_munmap+0x59/0x80 [ 34.418068] do_syscall_64+0x3f/0x90 [ 34.418602] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.419320] [ 34.419564] The buggy address belongs to the object at ffff88801aeb1828 [ 34.419564] which belongs to the cache vm_area_struct of size 168 [ 34.421207] The buggy address is located 88 bytes inside of [ 34.421207] freed 168-byte region [ffff88801aeb1828, ffff88801aeb18d0) [ 34.422797] [ 34.423037] The buggy address belongs to the physical page: [ 34.423778] page:00000000564cc57e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1aeb1 [ 34.424993] memcg:ffff888013f8bb01 [ 34.425470] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.426196] page_type: 0xffffffff() [ 34.426717] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.427754] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f8bb01 [ 34.428779] page dumped because: kasan: bad access detected [ 34.429523] [ 34.429762] Memory state around the buggy address: [ 34.430424] ffff88801aeb1780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 34.431383] ffff88801aeb1800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 34.432327] >ffff88801aeb1880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 34.433279] ^ [ 34.433740] ffff88801aeb1900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.434714] ffff88801aeb1980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 34.435671] ================================================================== [ 34.436769] Disabling lock debugging due to kernel taint [ 36.615657] BUG: Bad rss-counter state mm:000000001f7a0fb5 type:MM_FILEPAGES val:33 [ 36.616859] BUG: Bad rss-counter state mm:000000001f7a0fb5 type:MM_ANONPAGES val:22 [ 37.093277] BUG: Bad rss-counter state mm:00000000bf601e75 type:MM_FILEPAGES val:33 [ 37.094489] BUG: Bad rss-counter state mm:00000000bf601e75 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65362' (ECDSA) to the list of known hosts. 2023/06/20 08:34:43 fuzzer started 2023/06/20 08:34:43 dialing manager at localhost:44161 2023/06/20 08:34:43 checking machine... 2023/06/20 08:34:43 checking revisions... [ 37.791808] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:34:43 testing simple program... [ 37.837025] cgroup: Unknown subsys name 'net' [ 37.880281] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:34:39 Registers: info registers vcpu 0 RAX=ffffffff86120365 RBX=0000000000000001 RCX=ffffffff86120360 RDX=0000000000000000 RSI=1ffffffff0c2406c RDI=ffffffff85ded36c RBP=ffff8880146ef340 RSP=ffff8880146ef278 R8 =ffffffff86120330 R9 =ffff8880146ef328 R10=0000000000038001 R11=000000000001cfe6 R12=ffff8880146ef348 R13=ffff8880146ef330 R14=ffff8880146ef329 R15=ffff8880146ef2e8 RIP=ffffffff81130a5b RFL=00000217 [----APC] 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 00007f48539cd900 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=00007f4852dc8250 CR3=000000000c612000 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=e4f6e354868b36a87e44889f59fe9f9c XMM02=000000000011c798d59e07bde36eea69 XMM03=000000000011c8e0ec2efd57dc4c00df XMM04=1e118e65a3f7379800000000000ae988 XMM05=08072215fe35d6ea0000000000134418 XMM06=4fda316b135da52b00000000001334b8 XMM07=fb795ef6d65770560000000000123a48 XMM08=2c67c8bc2e329bc3000000000011c8e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000014 RCX=ffff888008fce280 RDX=0000000000000000 RSI=0000000000000014 RDI=0000000000000000 RBP=ffff88800e316114 RSP=ffff888017eafb98 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6996 R12=ffff88800e316100 R13=0000000000000000 R14=0000000000000001 R15=ffffea000038c500 RIP=ffffffff8180b9ef RFL=00000212 [----A--] 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 00007f9763561900 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=00007f9763b18618 CR3=0000000017cce000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000