syzkaller login: [ 30.059990] BUG: Bad rss-counter state mm:00000000116eb1c7 type:MM_FILEPAGES val:33 [ 30.061394] BUG: Bad rss-counter state mm:00000000116eb1c7 type:MM_ANONPAGES val:22 [ 30.233346] ================================================================== [ 30.234382] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.235416] Read of size 8 at addr ffff888016ca9310 by task sshd/221 [ 30.236448] [ 30.236684] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.237608] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.238884] Call Trace: [ 30.239307] [ 30.239673] dump_stack_lvl+0x91/0xf0 [ 30.240319] print_report+0xcc/0x620 [ 30.240949] ? __virt_addr_valid+0x102/0x340 [ 30.241719] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.242517] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.243334] kasan_report+0xbe/0xf0 [ 30.243959] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.244761] vma_interval_tree_remove+0xc75/0xec0 [ 30.245582] vma_prepare+0xc54/0x11a0 [ 30.246229] __split_vma+0x5af/0x950 [ 30.246874] ? __pfx___split_vma+0x10/0x10 [ 30.247467] ? find_held_lock+0x2c/0x110 [ 30.248027] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.248637] ? lock_is_held_type+0x9f/0x120 [ 30.249224] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.249929] ? mtree_range_walk+0x632/0x900 [ 30.250531] ? mas_walk+0x5c7/0x7c0 [ 30.251058] do_vmi_munmap+0x1f1/0x2b0 [ 30.251592] mmap_region+0x1f9/0x2660 [ 30.252114] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.252665] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.253435] ? __pfx_lock_acquire+0x10/0x10 [ 30.254051] ? __pfx_mmap_region+0x10/0x10 [ 30.254650] ? security_mmap_addr+0x7d/0xa0 [ 30.255376] ? get_unmapped_area+0x1f5/0x3f0 [ 30.256058] do_mmap+0x854/0xf00 [ 30.256589] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.257189] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.257865] ksys_mmap_pgoff+0x3af/0x500 [ 30.258481] do_syscall_64+0x3f/0x90 [ 30.259097] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.259889] RIP: 0033:0x7f0531da1d82 [ 30.260438] 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 [ 30.263050] RSP: 002b:00007ffccd6ad6b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.264151] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0531da1d82 [ 30.265187] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f05311db000 [ 30.266221] RBP: 00007f05311db000 R08: 0000000000000009 R09: 0000000000001000 [ 30.267268] R10: 0000000000000812 R11: 0000000000000206 R12: 00005574a2f9eec0 [ 30.268306] R13: 00007ffccd6ad6d0 R14: 00007ffccd6ad700 R15: 00007ffccd6ada60 [ 30.269355] [ 30.269707] [ 30.269973] Allocated by task 214: [ 30.270495] kasan_save_stack+0x22/0x50 [ 30.271119] kasan_set_track+0x25/0x30 [ 30.271617] __kasan_slab_alloc+0x59/0x70 [ 30.272149] kmem_cache_alloc+0x16b/0x370 [ 30.272667] vm_area_dup+0x20/0x160 [ 30.273119] __split_vma+0x170/0x950 [ 30.273584] split_vma+0xc6/0x110 [ 30.274014] mprotect_fixup+0x8d2/0xb30 [ 30.274510] do_mprotect_pkey+0x87e/0xd40 [ 30.275047] __x64_sys_mprotect+0x78/0xc0 [ 30.275559] do_syscall_64+0x3f/0x90 [ 30.276027] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.276666] [ 30.276879] Freed by task 214: [ 30.277319] kasan_save_stack+0x22/0x50 [ 30.277819] kasan_set_track+0x25/0x30 [ 30.278309] kasan_save_free_info+0x2b/0x50 [ 30.278852] __kasan_slab_free+0x10a/0x190 [ 30.279383] kmem_cache_free+0x10d/0x4d0 [ 30.279883] rcu_core+0x8c8/0x2860 [ 30.280323] __do_softirq+0x1b7/0x7d4 [ 30.280797] [ 30.281012] Last potentially related work creation: [ 30.281583] kasan_save_stack+0x22/0x50 [ 30.282078] __kasan_record_aux_stack+0x8e/0xa0 [ 30.282653] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.283294] remove_vma+0x139/0x170 [ 30.283738] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.284290] do_vmi_munmap+0x1f1/0x2b0 [ 30.284772] __vm_munmap+0x138/0x3a0 [ 30.285232] __x64_sys_munmap+0x59/0x80 [ 30.285727] do_syscall_64+0x3f/0x90 [ 30.286193] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.286844] [ 30.287058] The buggy address belongs to the object at ffff888016ca92b8 [ 30.287058] which belongs to the cache vm_area_struct of size 168 [ 30.288489] The buggy address is located 88 bytes inside of [ 30.288489] freed 168-byte region [ffff888016ca92b8, ffff888016ca9360) [ 30.289875] [ 30.290094] The buggy address belongs to the physical page: [ 30.290769] page:000000005e379842 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ca9 [ 30.291858] memcg:ffff88800ea59d01 [ 30.292276] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.292907] page_type: 0xffffffff() [ 30.293354] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.294266] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea59d01 [ 30.295164] page dumped because: kasan: bad access detected [ 30.295814] [ 30.296028] Memory state around the buggy address: [ 30.296605] ffff888016ca9200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.297455] ffff888016ca9280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.298299] >ffff888016ca9300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.299147] ^ [ 30.299604] ffff888016ca9380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.300449] ffff888016ca9400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.301289] ================================================================== [ 30.302206] Disabling lock debugging due to kernel taint [ 32.461588] BUG: Bad rss-counter state mm:000000006cdf976a type:MM_FILEPAGES val:33 [ 32.462822] BUG: Bad rss-counter state mm:000000006cdf976a type:MM_ANONPAGES val:22 [ 32.878792] BUG: Bad rss-counter state mm:00000000f4806194 type:MM_FILEPAGES val:33 [ 32.879746] BUG: Bad rss-counter state mm:00000000f4806194 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20014' (ECDSA) to the list of known hosts. 2023/06/21 07:37:46 fuzzer started 2023/06/21 07:37:46 dialing manager at localhost:36067 2023/06/21 07:37:46 checking machine... 2023/06/21 07:37:46 checking revisions... [ 33.653275] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:37:46 testing simple program... [ 33.702020] cgroup: Unknown subsys name 'net' [ 33.738256] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:37:46 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f0a7309a650 CR3=00000000159ae000 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=37333a3730203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732035343a3733 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323439 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=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=1ffff11001f75aad RSI=0000000000000008 RDI=ffff88800fbad568 RBP=ffff88800fbad560 RSP=ffff888016eb7570 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000095d0000095d R12=0000000000000000 R13=0000000000000005 R14=ffff888016eb7728 R15=ffff8880097f1b40 RIP=ffffffff812e0672 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 00007f0a72ae5900 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=00007f0a7309c618 CR3=000000000cc14000 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