syzkaller login: [ 40.719154] BUG: Bad rss-counter state mm:000000008e752d6e type:MM_FILEPAGES val:33 [ 40.720096] BUG: Bad rss-counter state mm:000000008e752d6e type:MM_ANONPAGES val:22 [ 40.880906] ================================================================== [ 40.881990] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.883254] Read of size 8 at addr ffff88800edf4a50 by task sshd/219 [ 40.884161] [ 40.884414] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.885642] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.887080] Call Trace: [ 40.887537] [ 40.887942] dump_stack_lvl+0x91/0xf0 [ 40.888627] print_report+0xcc/0x620 [ 40.889312] ? __virt_addr_valid+0x102/0x340 [ 40.890103] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.890876] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.891611] kasan_report+0xbe/0xf0 [ 40.892176] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.892925] vma_interval_tree_remove+0xc75/0xec0 [ 40.893643] vma_prepare+0xc54/0x11a0 [ 40.894255] __split_vma+0x5af/0x950 [ 40.894816] ? __pfx___split_vma+0x10/0x10 [ 40.895444] ? find_held_lock+0x2c/0x110 [ 40.896070] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.896752] ? lock_is_held_type+0x9f/0x120 [ 40.897383] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.898111] ? mtree_range_walk+0x632/0x900 [ 40.898771] ? mas_walk+0x5c7/0x7c0 [ 40.899329] do_vmi_munmap+0x1f1/0x2b0 [ 40.899916] mmap_region+0x1f9/0x2660 [ 40.900489] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.901095] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.901963] ? __pfx_lock_acquire+0x10/0x10 [ 40.902605] ? __pfx_mmap_region+0x10/0x10 [ 40.903240] ? security_mmap_addr+0x7d/0xa0 [ 40.903874] ? get_unmapped_area+0x1f5/0x3f0 [ 40.904533] do_mmap+0x854/0xf00 [ 40.905057] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.905651] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.906353] ksys_mmap_pgoff+0x3af/0x500 [ 40.906964] do_syscall_64+0x3f/0x90 [ 40.907536] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.908303] RIP: 0033:0x7fb9b1826d82 [ 40.908853] 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 [ 40.911417] RSP: 002b:00007fff5f8320d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.912509] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb9b1826d82 [ 40.913534] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb9b0c60000 [ 40.914559] RBP: 00007fb9b0c60000 R08: 0000000000000009 R09: 0000000000001000 [ 40.915579] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564482536ec0 [ 40.916605] R13: 00007fff5f8320f0 R14: 00007fff5f832120 R15: 00007fff5f832480 [ 40.917641] [ 40.918019] [ 40.918271] Allocated by task 212: [ 40.918786] kasan_save_stack+0x22/0x50 [ 40.919388] kasan_set_track+0x25/0x30 [ 40.919976] __kasan_slab_alloc+0x59/0x70 [ 40.920605] kmem_cache_alloc+0x16b/0x370 [ 40.921221] vm_area_dup+0x20/0x160 [ 40.921769] __split_vma+0x170/0x950 [ 40.922329] split_vma+0xc6/0x110 [ 40.922855] mprotect_fixup+0x8d2/0xb30 [ 40.923445] do_mprotect_pkey+0x87e/0xd40 [ 40.924081] __x64_sys_mprotect+0x78/0xc0 [ 40.924709] do_syscall_64+0x3f/0x90 [ 40.925273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.926061] [ 40.926313] Freed by task 212: [ 40.926784] kasan_save_stack+0x22/0x50 [ 40.927388] kasan_set_track+0x25/0x30 [ 40.927977] kasan_save_free_info+0x2b/0x50 [ 40.928613] __kasan_slab_free+0x10a/0x190 [ 40.929243] kmem_cache_free+0x10d/0x4d0 [ 40.929856] rcu_core+0x8c8/0x2860 [ 40.930385] __do_softirq+0x1b7/0x7d4 [ 40.930950] [ 40.931206] Last potentially related work creation: [ 40.931914] kasan_save_stack+0x22/0x50 [ 40.932512] __kasan_record_aux_stack+0x8e/0xa0 [ 40.933206] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.933985] remove_vma+0x139/0x170 [ 40.934528] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.935203] do_vmi_munmap+0x1f1/0x2b0 [ 40.935782] __vm_munmap+0x138/0x3a0 [ 40.936335] __x64_sys_munmap+0x59/0x80 [ 40.936925] do_syscall_64+0x3f/0x90 [ 40.937489] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.938269] [ 40.938521] The buggy address belongs to the object at ffff88800edf49f8 [ 40.938521] which belongs to the cache vm_area_struct of size 168 [ 40.940000] The buggy address is located 88 bytes inside of [ 40.940000] freed 168-byte region [ffff88800edf49f8, ffff88800edf4aa0) [ 40.941322] [ 40.941529] The buggy address belongs to the physical page: [ 40.942172] page:000000001e0df2aa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedf4 [ 40.943196] memcg:ffff88800d6a5501 [ 40.943596] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.944202] page_type: 0xffffffff() [ 40.944627] raw: 0100000000000200 ffff88800879fc80 ffffea000035d140 dead000000000008 [ 40.945498] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d6a5501 [ 40.946364] page dumped because: kasan: bad access detected [ 40.946986] [ 40.947193] Memory state around the buggy address: [ 40.947736] ffff88800edf4900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.948551] ffff88800edf4980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 40.949555] >ffff88800edf4a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.950574] ^ [ 40.951396] ffff88800edf4a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 40.952398] ffff88800edf4b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.953397] ================================================================== [ 40.954801] Disabling lock debugging due to kernel taint [ 43.382022] BUG: Bad rss-counter state mm:000000000906dc2d type:MM_FILEPAGES val:33 [ 43.383036] BUG: Bad rss-counter state mm:000000000906dc2d type:MM_ANONPAGES val:22 [ 43.849954] BUG: Bad rss-counter state mm:000000002c4acca7 type:MM_FILEPAGES val:33 [ 43.850950] BUG: Bad rss-counter state mm:000000002c4acca7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23653' (ECDSA) to the list of known hosts. 2023/06/19 21:30:14 fuzzer started 2023/06/19 21:30:14 dialing manager at localhost:44161 2023/06/19 21:30:14 checking machine... 2023/06/19 21:30:14 checking revisions... [ 44.554069] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:30:15 testing simple program... [ 44.599439] cgroup: Unknown subsys name 'net' [ 44.649260] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:30:04 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888017fe7580 RCX=ffff888017fe7588 RDX=1ffff11002ffce9d RSI=ffff888017fe74b8 RDI=ffff888017fe74e8 RBP=dffffc0000000000 RSP=ffff888017fe7470 R8 =0000000000000001 R9 =ffff888017fe7528 R10=0000000000038001 R11=0000000000006097 R12=ffffed1002ffce9f R13=ffffed1002ffce9e R14=ffff888017fe7530 R15=ffff888017fe74e8 RIP=ffffffff811305f0 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 00007fe84640e700 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=00007f331a1f8fa0 CR3=000000000c640000 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=00000000000000000000000000000000 XMM01=656e6e6f637369642064657669656365 XMM02=63736964203a31313a30393634332074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303936 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=0000000080000000 RBX=0000000000000007 RCX=0000000000000000 RDX=ffff88801a059b40 RSI=ffffffff837263f9 RDI=0000000000000005 RBP=0000000000000008 RSP=ffff88801a28f7b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000002 R13=ffffffff87f96b18 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c0805 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 00007f6915346900 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=000055be39e86954 CR3=000000001cc26000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000