syzkaller login: [ 35.297326] BUG: Bad rss-counter state mm:00000000d809ee25 type:MM_FILEPAGES val:33 [ 35.298392] BUG: Bad rss-counter state mm:00000000d809ee25 type:MM_ANONPAGES val:22 [ 35.348647] ================================================================== [ 35.349816] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.351012] Read of size 8 at addr ffff88800c799ed8 by task sshd/219 [ 35.351823] [ 35.352065] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.352959] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.354004] Call Trace: [ 35.354359] [ 35.354650] dump_stack_lvl+0x91/0xf0 [ 35.355163] print_report+0xcc/0x620 [ 35.355673] ? __virt_addr_valid+0x102/0x340 [ 35.356253] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.356891] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.357536] kasan_report+0xbe/0xf0 [ 35.358030] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.358650] vma_interval_tree_remove+0xc75/0xec0 [ 35.359320] vma_prepare+0xc54/0x11a0 [ 35.359813] __split_vma+0x5af/0x950 [ 35.360315] ? __pfx___split_vma+0x10/0x10 [ 35.360862] ? find_held_lock+0x2c/0x110 [ 35.361420] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.361999] ? lock_is_held_type+0x9f/0x120 [ 35.362561] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.363205] ? mtree_range_walk+0x632/0x900 [ 35.363776] ? mas_walk+0x5c7/0x7c0 [ 35.364290] do_vmi_munmap+0x1f1/0x2b0 [ 35.364803] mmap_region+0x1f9/0x2660 [ 35.365309] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.365843] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.366605] ? __pfx_lock_acquire+0x10/0x10 [ 35.367164] ? __pfx_mmap_region+0x10/0x10 [ 35.367744] ? security_mmap_addr+0x7d/0xa0 [ 35.368301] ? get_unmapped_area+0x1f5/0x3f0 [ 35.368873] do_mmap+0x854/0xf00 [ 35.369360] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.369874] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.370468] ksys_mmap_pgoff+0x3af/0x500 [ 35.370994] do_syscall_64+0x3f/0x90 [ 35.371512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.372198] RIP: 0033:0x7fc4c4eebd82 [ 35.372667] 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 [ 35.374872] RSP: 002b:00007ffebe60b958 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.375849] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc4c4eebd82 [ 35.376733] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc4c4325000 [ 35.377614] RBP: 00007fc4c4325000 R08: 0000000000000009 R09: 0000000000001000 [ 35.378509] R10: 0000000000000812 R11: 0000000000000206 R12: 00005576c85ebec0 [ 35.379431] R13: 00007ffebe60b970 R14: 00007ffebe60b9a0 R15: 00007ffebe60bd00 [ 35.380393] [ 35.380720] [ 35.380954] Allocated by task 212: [ 35.381434] kasan_save_stack+0x22/0x50 [ 35.381976] kasan_set_track+0x25/0x30 [ 35.382520] __kasan_slab_alloc+0x59/0x70 [ 35.383111] kmem_cache_alloc+0x16b/0x370 [ 35.383688] vm_area_dup+0x20/0x160 [ 35.384206] __split_vma+0x170/0x950 [ 35.384703] split_vma+0xc6/0x110 [ 35.385195] mprotect_fixup+0x8d2/0xb30 [ 35.385740] do_mprotect_pkey+0x87e/0xd40 [ 35.386322] __x64_sys_mprotect+0x78/0xc0 [ 35.386897] do_syscall_64+0x3f/0x90 [ 35.387447] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.388166] [ 35.388389] Freed by task 203: [ 35.388803] kasan_save_stack+0x22/0x50 [ 35.389435] kasan_set_track+0x25/0x30 [ 35.390014] kasan_save_free_info+0x2b/0x50 [ 35.390581] __kasan_slab_free+0x10a/0x190 [ 35.391156] kmem_cache_free+0x10d/0x4d0 [ 35.391752] rcu_core+0x8c8/0x2860 [ 35.392228] __do_softirq+0x1b7/0x7d4 [ 35.392733] [ 35.392956] Last potentially related work creation: [ 35.393576] kasan_save_stack+0x22/0x50 [ 35.394124] __kasan_record_aux_stack+0x8e/0xa0 [ 35.394722] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.395424] remove_vma+0x139/0x170 [ 35.395892] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.396484] do_vmi_munmap+0x1f1/0x2b0 [ 35.397000] __vm_munmap+0x138/0x3a0 [ 35.397492] __x64_sys_munmap+0x59/0x80 [ 35.398020] do_syscall_64+0x3f/0x90 [ 35.398516] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.399242] [ 35.399467] The buggy address belongs to the object at ffff88800c799e80 [ 35.399467] which belongs to the cache vm_area_struct of size 168 [ 35.401014] The buggy address is located 88 bytes inside of [ 35.401014] freed 168-byte region [ffff88800c799e80, ffff88800c799f28) [ 35.402483] [ 35.402706] The buggy address belongs to the physical page: [ 35.403450] page:0000000049455b85 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc799 [ 35.404599] memcg:ffff88800febb801 [ 35.405059] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.405788] page_type: 0xffffffff() [ 35.406268] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 35.407292] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800febb801 [ 35.408248] page dumped because: kasan: bad access detected [ 35.408942] [ 35.409189] Memory state around the buggy address: [ 35.409796] ffff88800c799d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.410694] ffff88800c799e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 35.411624] >ffff88800c799e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.412533] ^ [ 35.413297] ffff88800c799f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 35.414223] ffff88800c799f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.415137] ================================================================== [ 35.416129] Disabling lock debugging due to kernel taint [ 37.917030] BUG: Bad rss-counter state mm:00000000d7ce198c type:MM_FILEPAGES val:33 [ 37.918745] BUG: Bad rss-counter state mm:00000000d7ce198c type:MM_ANONPAGES val:22 [ 38.439275] BUG: Bad rss-counter state mm:000000005e2a7f71 type:MM_FILEPAGES val:33 [ 38.440347] BUG: Bad rss-counter state mm:000000005e2a7f71 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65485' (ECDSA) to the list of known hosts. 2023/06/21 00:10:43 fuzzer started 2023/06/21 00:10:44 dialing manager at localhost:36067 2023/06/21 00:10:44 checking machine... 2023/06/21 00:10:44 checking revisions... [ 39.267665] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:10:44 testing simple program... [ 39.323032] cgroup: Unknown subsys name 'net' [ 39.367949] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:10:43 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce39500 RCX=0000000000000000 RDX=1ffff1100d9c73e0 RSI=0000000000000004 RDI=ffff88806ce39f00 RBP=ffffffff85d3e490 RSP=ffff888008d9fd20 R8 =0000000000000001 R9 =ffffed10011b3f9f R10=0000000000000003 R11=0000000000000128 R12=ffff88806ce39500 R13=ffff88806ce39fe0 R14=ffff888008d90000 R15=0000000000000000 RIP=ffffffff812360a9 RFL=00000046 [---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 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=00007fe1d00ea6e0 CR3=000000000e278000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffdd20f5638 CR3=000000000f364000 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=30313a3030203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732033343a3031 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363635 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000