syzkaller login: [ 32.170556] BUG: Bad rss-counter state mm:000000009ad03de2 type:MM_FILEPAGES val:33 [ 32.171978] BUG: Bad rss-counter state mm:000000009ad03de2 type:MM_ANONPAGES val:22 [ 32.335285] ================================================================== [ 32.336223] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.337199] Read of size 8 at addr ffff88800f9a4140 by task sshd/220 [ 32.337987] [ 32.338217] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.339215] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.340211] Call Trace: [ 32.340539] [ 32.340850] dump_stack_lvl+0x91/0xf0 [ 32.341347] print_report+0xcc/0x620 [ 32.341854] ? __virt_addr_valid+0x102/0x340 [ 32.342447] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.343070] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.343701] kasan_report+0xbe/0xf0 [ 32.344196] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.344835] vma_interval_tree_remove+0xc75/0xec0 [ 32.345436] vma_prepare+0xc54/0x11a0 [ 32.345931] __split_vma+0x5af/0x950 [ 32.346428] ? __pfx___split_vma+0x10/0x10 [ 32.346972] ? find_held_lock+0x2c/0x110 [ 32.347513] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.348092] ? lock_is_held_type+0x9f/0x120 [ 32.348631] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.349250] ? mtree_range_walk+0x632/0x900 [ 32.349807] ? mas_walk+0x5c7/0x7c0 [ 32.350299] do_vmi_munmap+0x1f1/0x2b0 [ 32.350797] mmap_region+0x1f9/0x2660 [ 32.351281] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.351807] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.352523] ? __pfx_lock_acquire+0x10/0x10 [ 32.353067] ? __pfx_mmap_region+0x10/0x10 [ 32.353607] ? security_mmap_addr+0x7d/0xa0 [ 32.354179] ? get_unmapped_area+0x1f5/0x3f0 [ 32.354757] do_mmap+0x854/0xf00 [ 32.355206] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.355720] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.356301] ksys_mmap_pgoff+0x3af/0x500 [ 32.356816] do_syscall_64+0x3f/0x90 [ 32.357299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.357960] RIP: 0033:0x7f72ae8fed82 [ 32.358438] 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 [ 32.360629] RSP: 002b:00007fff827d6788 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.361589] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f72ae8fed82 [ 32.362479] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f72add38000 [ 32.363347] RBP: 00007f72add38000 R08: 0000000000000009 R09: 0000000000001000 [ 32.364218] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564d762c8f70 [ 32.365096] R13: 00007fff827d67a0 R14: 00007fff827d67d0 R15: 00007fff827d6b30 [ 32.365985] [ 32.366291] [ 32.366509] Allocated by task 213: [ 32.366941] kasan_save_stack+0x22/0x50 [ 32.367455] kasan_set_track+0x25/0x30 [ 32.367969] __kasan_slab_alloc+0x59/0x70 [ 32.368507] kmem_cache_alloc+0x16b/0x370 [ 32.369041] vm_area_dup+0x20/0x160 [ 32.369502] __split_vma+0x170/0x950 [ 32.370001] split_vma+0xc6/0x110 [ 32.370460] mprotect_fixup+0x8d2/0xb30 [ 32.370972] do_mprotect_pkey+0x87e/0xd40 [ 32.371497] __x64_sys_mprotect+0x78/0xc0 [ 32.372024] do_syscall_64+0x3f/0x90 [ 32.372504] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.373151] [ 32.373365] Freed by task 203: [ 32.373762] kasan_save_stack+0x22/0x50 [ 32.374276] kasan_set_track+0x25/0x30 [ 32.374783] kasan_save_free_info+0x2b/0x50 [ 32.375322] __kasan_slab_free+0x10a/0x190 [ 32.375856] kmem_cache_free+0x10d/0x4d0 [ 32.376371] rcu_core+0x8c8/0x2860 [ 32.376817] __do_softirq+0x1b7/0x7d4 [ 32.377301] [ 32.377515] Last potentially related work creation: [ 32.378108] kasan_save_stack+0x22/0x50 [ 32.378612] __kasan_record_aux_stack+0x8e/0xa0 [ 32.379189] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.379836] remove_vma+0x139/0x170 [ 32.380297] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.380867] do_vmi_munmap+0x1f1/0x2b0 [ 32.381358] __vm_munmap+0x138/0x3a0 [ 32.381834] __x64_sys_munmap+0x59/0x80 [ 32.382362] do_syscall_64+0x3f/0x90 [ 32.382848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.383492] [ 32.383710] The buggy address belongs to the object at ffff88800f9a40e8 [ 32.383710] which belongs to the cache vm_area_struct of size 168 [ 32.385192] The buggy address is located 88 bytes inside of [ 32.385192] freed 168-byte region [ffff88800f9a40e8, ffff88800f9a4190) [ 32.386601] [ 32.386821] The buggy address belongs to the physical page: [ 32.387492] page:00000000d65ba34a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf9a4 [ 32.388577] memcg:ffff888015da1201 [ 32.389001] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.389661] page_type: 0xffffffff() [ 32.390130] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.391051] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015da1201 [ 32.391963] page dumped because: kasan: bad access detected [ 32.392623] [ 32.392843] Memory state around the buggy address: [ 32.393426] ffff88800f9a4000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.394294] ffff88800f9a4080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 32.395166] >ffff88800f9a4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.396015] ^ [ 32.396653] ffff88800f9a4180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.397515] ffff88800f9a4200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.398380] ================================================================== [ 32.399417] Disabling lock debugging due to kernel taint [ 34.463078] BUG: Bad rss-counter state mm:00000000faaf91a6 type:MM_FILEPAGES val:33 [ 34.464279] BUG: Bad rss-counter state mm:00000000faaf91a6 type:MM_ANONPAGES val:22 [ 34.970935] BUG: Bad rss-counter state mm:00000000c5bb52f7 type:MM_FILEPAGES val:33 [ 34.972241] BUG: Bad rss-counter state mm:00000000c5bb52f7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44532' (ECDSA) to the list of known hosts. 2023/06/19 18:15:38 fuzzer started 2023/06/19 18:15:38 dialing manager at localhost:44161 2023/06/19 18:15:38 checking machine... 2023/06/19 18:15:38 checking revisions... [ 35.528595] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:15:38 testing simple program... [ 35.580667] cgroup: Unknown subsys name 'net' [ 35.613475] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:15:37 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000056226165ed60 RCX=0000000000000000 RDX=0000000000000200 RSI=0000000000000003 RDI=00007fe2301e9b5f RBP=00007ffe4bf332b0 RSP=00007ffe4bf33130 R8 =0000000000000005 R9 =ffffffffffffff01 R10=0000000000000002 R11=000056226165f358 R12=00000000ffffffff R13=0000000000000002 R14=00005622616a2030 R15=0000000000000002 RIP=00007fe22fdfeb92 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe22f5f6900 00000000 00000000 GS =0000 0000000000000000 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=00007fe22ea5bf40 CR3=000000000d656000 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=006c616e72756f6a2e6d65747379732f XMM01=ffffffffffffff00ffffffffffffff00 XMM02=00000000000000410000000000000038 XMM03=000000006563696c732e6d6574737973 XMM04=04e2cc81ffba259300000000000ae988 XMM05=1319e678c5640f8a0000000000134a28 XMM06=94aac670ef06ff650000000000134990 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888008e2d1c0 RBX=ffff888008e57a10 RCX=ffff888008e57a10 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff888008e57978 RBP=ffff888008e2d1c0 RSP=ffff888008e57920 R8 =0000000000000002 R9 =0000000000000006 R10=ffffed1003469b56 R11=0000000000000128 R12=0000000000000000 R13=ffff888008e579a0 R14=ffff888008e2d1c0 R15=ffff888008e57978 RIP=ffffffff8450d3a0 RFL=00000296 [--S-AP-] 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=00007ffde6075000 CR3=000000000f6f8000 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=35313a3831203931206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732037333a3531 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323134 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000