syzkaller login: [ 29.733772] BUG: Bad rss-counter state mm:00000000ace0f687 type:MM_FILEPAGES val:33 [ 29.735026] BUG: Bad rss-counter state mm:00000000ace0f687 type:MM_ANONPAGES val:22 [ 29.904934] ================================================================== [ 29.905882] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.906842] Read of size 8 at addr ffff88800cba0a50 by task sshd/220 [ 29.907734] [ 29.907957] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.908828] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.909819] Call Trace: [ 29.910139] [ 29.910423] dump_stack_lvl+0x91/0xf0 [ 29.910924] print_report+0xcc/0x620 [ 29.911406] ? __virt_addr_valid+0x102/0x340 [ 29.912010] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.912652] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.913284] kasan_report+0xbe/0xf0 [ 29.913770] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.914402] vma_interval_tree_remove+0xc75/0xec0 [ 29.915023] vma_prepare+0xc54/0x11a0 [ 29.915502] __split_vma+0x5af/0x950 [ 29.915998] ? __pfx___split_vma+0x10/0x10 [ 29.916542] ? find_held_lock+0x2c/0x110 [ 29.917072] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.917640] ? lock_is_held_type+0x9f/0x120 [ 29.918201] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.918828] ? mtree_range_walk+0x632/0x900 [ 29.919399] ? mas_walk+0x5c7/0x7c0 [ 29.919912] do_vmi_munmap+0x1f1/0x2b0 [ 29.920401] mmap_region+0x1f9/0x2660 [ 29.920882] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.921392] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.922112] ? __pfx_lock_acquire+0x10/0x10 [ 29.922650] ? __pfx_mmap_region+0x10/0x10 [ 29.923178] ? security_mmap_addr+0x7d/0xa0 [ 29.923726] ? get_unmapped_area+0x1f5/0x3f0 [ 29.924272] do_mmap+0x854/0xf00 [ 29.924714] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.925215] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.925791] ksys_mmap_pgoff+0x3af/0x500 [ 29.926294] do_syscall_64+0x3f/0x90 [ 29.926777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.927423] RIP: 0033:0x7fb8fe8abd82 [ 29.927900] 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 [ 29.930023] RSP: 002b:00007ffff1c27518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.930920] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb8fe8abd82 [ 29.931792] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb8fdce5000 [ 29.932642] RBP: 00007fb8fdce5000 R08: 0000000000000009 R09: 0000000000001000 [ 29.933485] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558d786aa980 [ 29.934323] R13: 00007ffff1c27530 R14: 00007ffff1c27560 R15: 00007ffff1c278c0 [ 29.935169] [ 29.935457] [ 29.935672] Allocated by task 213: [ 29.936120] kasan_save_stack+0x22/0x50 [ 29.936618] kasan_set_track+0x25/0x30 [ 29.937115] __kasan_slab_alloc+0x59/0x70 [ 29.937638] kmem_cache_alloc+0x16b/0x370 [ 29.938156] vm_area_dup+0x20/0x160 [ 29.938611] __split_vma+0x170/0x950 [ 29.939073] split_vma+0xc6/0x110 [ 29.939508] mprotect_fixup+0x8d2/0xb30 [ 29.940031] do_mprotect_pkey+0x87e/0xd40 [ 29.940547] __x64_sys_mprotect+0x78/0xc0 [ 29.941071] do_syscall_64+0x3f/0x90 [ 29.941543] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.942186] [ 29.942401] Freed by task 213: [ 29.942789] kasan_save_stack+0x22/0x50 [ 29.943296] kasan_set_track+0x25/0x30 [ 29.943791] kasan_save_free_info+0x2b/0x50 [ 29.944324] __kasan_slab_free+0x10a/0x190 [ 29.944848] kmem_cache_free+0x10d/0x4d0 [ 29.945353] rcu_core+0x8c8/0x2860 [ 29.945794] __do_softirq+0x1b7/0x7d4 [ 29.946267] [ 29.946483] Last potentially related work creation: [ 29.947065] kasan_save_stack+0x22/0x50 [ 29.947561] __kasan_record_aux_stack+0x8e/0xa0 [ 29.948159] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.948805] remove_vma+0x139/0x170 [ 29.949250] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.949807] do_vmi_munmap+0x1f1/0x2b0 [ 29.950296] __vm_munmap+0x138/0x3a0 [ 29.950769] __x64_sys_munmap+0x59/0x80 [ 29.951256] do_syscall_64+0x3f/0x90 [ 29.951737] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.952375] [ 29.952589] The buggy address belongs to the object at ffff88800cba09f8 [ 29.952589] which belongs to the cache vm_area_struct of size 168 [ 29.954033] The buggy address is located 88 bytes inside of [ 29.954033] freed 168-byte region [ffff88800cba09f8, ffff88800cba0aa0) [ 29.955427] [ 29.955642] The buggy address belongs to the physical page: [ 29.956316] page:000000000014bf39 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcba0 [ 29.957389] memcg:ffff8880158c1e01 [ 29.957817] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.958461] page_type: 0xffffffff() [ 29.958910] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.959837] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880158c1e01 [ 29.960739] page dumped because: kasan: bad access detected [ 29.961396] [ 29.961610] Memory state around the buggy address: [ 29.962186] ffff88800cba0900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.963041] ffff88800cba0980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 29.963914] >ffff88800cba0a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.964762] ^ [ 29.965456] ffff88800cba0a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 29.966312] ffff88800cba0b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.967150] ================================================================== [ 29.968121] Disabling lock debugging due to kernel taint [ 31.964843] BUG: Bad rss-counter state mm:000000000e25ad55 type:MM_FILEPAGES val:33 [ 31.966036] BUG: Bad rss-counter state mm:000000000e25ad55 type:MM_ANONPAGES val:22 [ 32.500788] BUG: Bad rss-counter state mm:00000000fe375599 type:MM_FILEPAGES val:33 [ 32.501981] BUG: Bad rss-counter state mm:00000000fe375599 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23610' (ECDSA) to the list of known hosts. 2023/06/21 08:35:43 fuzzer started 2023/06/21 08:35:43 dialing manager at localhost:36067 2023/06/21 08:35:43 checking machine... 2023/06/21 08:35:43 checking revisions... [ 33.144092] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:35:43 testing simple program... [ 33.187510] cgroup: Unknown subsys name 'net' [ 33.239121] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:35:43 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000607f92e15678 RCX=0000000000000000 RDX=1ffffffff0a58f20 RSI=ffff8880164cca00 RDI=ffffffff852c7900 RBP=ffff8880068b77e8 RSP=ffff8880068b76b8 R8 =ffff88801462d668 R9 =ffffed1002c99a2e R10=0000000000000001 R11=0000000000000000 R12=ffff88806ce39500 R13=ffff88801462d1c0 R14=ffff8880165e5668 R15=ffff8880165e51c0 RIP=ffffffff8451df3e 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 00007f319fda1700 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=00007fb7bf6e3618 CR3=000000000fb26000 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=35333a3830203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363134 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007f702d7b15c0 CR3=000000000dd94000 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=2032343a35333a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a35333a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000