syzkaller login: [ 30.032950] BUG: Bad rss-counter state mm:00000000ebf8e5bb type:MM_FILEPAGES val:33 [ 30.034228] BUG: Bad rss-counter state mm:00000000ebf8e5bb type:MM_ANONPAGES val:22 [ 30.191275] ================================================================== [ 30.192134] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.193014] Read of size 8 at addr ffff88800e7a56b0 by task sshd/219 [ 30.193737] [ 30.193945] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.194825] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.195749] Call Trace: [ 30.196051] [ 30.196325] dump_stack_lvl+0x91/0xf0 [ 30.196792] print_report+0xcc/0x620 [ 30.197252] ? __virt_addr_valid+0x102/0x340 [ 30.197798] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.198374] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.198957] kasan_report+0xbe/0xf0 [ 30.199407] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.199990] vma_interval_tree_remove+0xc75/0xec0 [ 30.200556] vma_prepare+0xc54/0x11a0 [ 30.201036] __split_vma+0x5af/0x950 [ 30.201509] ? __pfx___split_vma+0x10/0x10 [ 30.202044] ? find_held_lock+0x2c/0x110 [ 30.202569] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.203129] ? lock_is_held_type+0x9f/0x120 [ 30.203668] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.204284] ? mtree_range_walk+0x632/0x900 [ 30.204834] ? mas_walk+0x5c7/0x7c0 [ 30.205307] do_vmi_munmap+0x1f1/0x2b0 [ 30.205816] mmap_region+0x1f9/0x2660 [ 30.206298] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.206809] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.207525] ? __pfx_lock_acquire+0x10/0x10 [ 30.208062] ? __pfx_mmap_region+0x10/0x10 [ 30.208585] ? security_mmap_addr+0x7d/0xa0 [ 30.209113] ? get_unmapped_area+0x1f5/0x3f0 [ 30.209681] do_mmap+0x854/0xf00 [ 30.210118] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.210609] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.211179] ksys_mmap_pgoff+0x3af/0x500 [ 30.211688] do_syscall_64+0x3f/0x90 [ 30.212167] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.212804] RIP: 0033:0x7f814bd22d82 [ 30.213260] 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 [ 30.215424] RSP: 002b:00007ffdd020a4e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.216314] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f814bd22d82 [ 30.217162] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f814b15c000 [ 30.218020] RBP: 00007f814b15c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.218869] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a7ee25bf70 [ 30.219722] R13: 00007ffdd020a500 R14: 00007ffdd020a530 R15: 00007ffdd020a890 [ 30.220583] [ 30.220883] [ 30.221101] Allocated by task 212: [ 30.221551] kasan_save_stack+0x22/0x50 [ 30.222062] kasan_set_track+0x25/0x30 [ 30.222552] __kasan_slab_alloc+0x59/0x70 [ 30.223076] kmem_cache_alloc+0x16b/0x370 [ 30.223589] vm_area_dup+0x20/0x160 [ 30.224041] __split_vma+0x170/0x950 [ 30.224503] split_vma+0xc6/0x110 [ 30.224942] mprotect_fixup+0x8d2/0xb30 [ 30.225439] do_mprotect_pkey+0x87e/0xd40 [ 30.225975] __x64_sys_mprotect+0x78/0xc0 [ 30.226493] do_syscall_64+0x3f/0x90 [ 30.226967] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.227604] [ 30.227815] Freed by task 212: [ 30.228210] kasan_save_stack+0x22/0x50 [ 30.228705] kasan_set_track+0x25/0x30 [ 30.229199] kasan_save_free_info+0x2b/0x50 [ 30.229744] __kasan_slab_free+0x10a/0x190 [ 30.230274] kmem_cache_free+0x10d/0x4d0 [ 30.230778] rcu_core+0x8c8/0x2860 [ 30.231217] __do_softirq+0x1b7/0x7d4 [ 30.231700] [ 30.231922] Last potentially related work creation: [ 30.232507] kasan_save_stack+0x22/0x50 [ 30.233013] __kasan_record_aux_stack+0x8e/0xa0 [ 30.233595] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.234245] remove_vma+0x139/0x170 [ 30.234701] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.235256] do_vmi_munmap+0x1f1/0x2b0 [ 30.235738] __vm_munmap+0x138/0x3a0 [ 30.236207] __x64_sys_munmap+0x59/0x80 [ 30.236707] do_syscall_64+0x3f/0x90 [ 30.237178] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.237839] [ 30.238049] The buggy address belongs to the object at ffff88800e7a5658 [ 30.238049] which belongs to the cache vm_area_struct of size 168 [ 30.239654] The buggy address is located 88 bytes inside of [ 30.239654] freed 168-byte region [ffff88800e7a5658, ffff88800e7a5700) [ 30.241082] [ 30.241300] The buggy address belongs to the physical page: [ 30.241988] page:00000000b29617cf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7a5 [ 30.243059] memcg:ffff88800eb7e001 [ 30.243489] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.244139] page_type: 0xffffffff() [ 30.244586] raw: 0100000000000200 ffff8880087a0c80 ffffea00003fed40 dead000000000002 [ 30.245512] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb7e001 [ 30.246424] page dumped because: kasan: bad access detected [ 30.247091] [ 30.247307] Memory state around the buggy address: [ 30.247896] ffff88800e7a5580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.248745] ffff88800e7a5600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.249609] >ffff88800e7a5680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.250457] ^ [ 30.251048] ffff88800e7a5700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.251902] ffff88800e7a5780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.252756] ================================================================== [ 30.253753] Disabling lock debugging due to kernel taint [ 32.834877] BUG: Bad rss-counter state mm:00000000ece45918 type:MM_FILEPAGES val:33 [ 32.836082] BUG: Bad rss-counter state mm:00000000ece45918 type:MM_ANONPAGES val:22 [ 33.296882] BUG: Bad rss-counter state mm:00000000aec28848 type:MM_FILEPAGES val:33 [ 33.298550] BUG: Bad rss-counter state mm:00000000aec28848 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2453' (ECDSA) to the list of known hosts. 2023/06/21 02:45:24 fuzzer started 2023/06/21 02:45:24 dialing manager at localhost:36067 2023/06/21 02:45:24 checking machine... 2023/06/21 02:45:24 checking revisions... [ 34.023071] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:45:24 testing simple program... [ 34.066493] cgroup: Unknown subsys name 'net' [ 34.118596] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:45:23 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff854ee9e8 RCX=ffffffff814831dd RDX=ffff888015b551c0 RSI=0000000000000000 RDI=0000000000000004 RBP=0000000000000000 RSP=ffff8880147877c8 R8 =0000000000000004 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffffffff854ee9e0 R15=0000000000000001 RIP=ffffffff814c0864 RFL=00000246 [---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 00007ff0857bb900 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=00007ff084c12550 CR3=000000000d764000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=8ce90fd81a38c5a700000000000ae988 XMM05=384a35d073afef0d0000000000132698 XMM06=806171799158d9670000000000131488 XMM07=fb795ef6d657705600000000001217d0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007f3054315618 CR3=0000000014766000 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=35343a3230203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363030 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000