syzkaller login: [ 31.829716] BUG: Bad rss-counter state mm:00000000511104a0 type:MM_FILEPAGES val:33 [ 31.830994] BUG: Bad rss-counter state mm:00000000511104a0 type:MM_ANONPAGES val:22 [ 31.867472] ================================================================== [ 31.868310] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.869311] Read of size 8 at addr ffff88800c97ddf0 by task sshd/219 [ 31.870110] [ 31.870388] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.871190] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.872117] Call Trace: [ 31.872416] [ 31.872687] dump_stack_lvl+0x91/0xf0 [ 31.873147] print_report+0xcc/0x620 [ 31.873599] ? __virt_addr_valid+0x102/0x340 [ 31.874114] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.874709] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.875288] kasan_report+0xbe/0xf0 [ 31.875734] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.876317] vma_interval_tree_remove+0xc75/0xec0 [ 31.876878] vma_prepare+0xc54/0x11a0 [ 31.877326] __split_vma+0x5af/0x950 [ 31.877768] ? __pfx___split_vma+0x10/0x10 [ 31.878286] ? find_held_lock+0x2c/0x110 [ 31.878773] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.879309] ? lock_is_held_type+0x9f/0x120 [ 31.879813] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.880390] ? mtree_range_walk+0x632/0x900 [ 31.880913] ? mas_walk+0x5c7/0x7c0 [ 31.881362] do_vmi_munmap+0x1f1/0x2b0 [ 31.881823] mmap_region+0x1f9/0x2660 [ 31.882286] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.882765] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.883436] ? __pfx_lock_acquire+0x10/0x10 [ 31.883934] ? __pfx_mmap_region+0x10/0x10 [ 31.884428] ? security_mmap_addr+0x7d/0xa0 [ 31.884925] ? get_unmapped_area+0x1f5/0x3f0 [ 31.885440] do_mmap+0x854/0xf00 [ 31.885855] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.886327] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.886853] ksys_mmap_pgoff+0x3af/0x500 [ 31.887334] do_syscall_64+0x3f/0x90 [ 31.887787] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.888392] RIP: 0033:0x7f370a339d82 [ 31.888818] 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 [ 31.890809] RSP: 002b:00007ffd272d9a28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.891663] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f370a339d82 [ 31.892448] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3709773000 [ 31.893239] RBP: 00007f3709773000 R08: 0000000000000009 R09: 0000000000001000 [ 31.894035] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c0841ffec0 [ 31.894832] R13: 00007ffd272d9a40 R14: 00007ffd272d9a70 R15: 00007ffd272d9dd0 [ 31.895631] [ 31.895905] [ 31.896112] Allocated by task 212: [ 31.896513] kasan_save_stack+0x22/0x50 [ 31.896991] kasan_set_track+0x25/0x30 [ 31.897462] __kasan_slab_alloc+0x59/0x70 [ 31.897954] kmem_cache_alloc+0x16b/0x370 [ 31.898457] vm_area_dup+0x20/0x160 [ 31.898881] __split_vma+0x170/0x950 [ 31.899315] split_vma+0xc6/0x110 [ 31.899728] mprotect_fixup+0x8d2/0xb30 [ 31.900201] do_mprotect_pkey+0x87e/0xd40 [ 31.900689] __x64_sys_mprotect+0x78/0xc0 [ 31.901177] do_syscall_64+0x3f/0x90 [ 31.901620] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.902231] [ 31.902437] Freed by task 212: [ 31.902805] kasan_save_stack+0x22/0x50 [ 31.903276] kasan_set_track+0x25/0x30 [ 31.903738] kasan_save_free_info+0x2b/0x50 [ 31.904236] __kasan_slab_free+0x10a/0x190 [ 31.904739] kmem_cache_free+0x10d/0x4d0 [ 31.905218] rcu_core+0x8c8/0x2860 [ 31.905641] __do_softirq+0x1b7/0x7d4 [ 31.906088] [ 31.906308] Last potentially related work creation: [ 31.906856] kasan_save_stack+0x22/0x50 [ 31.907324] __kasan_record_aux_stack+0x8e/0xa0 [ 31.907864] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.908465] remove_vma+0x139/0x170 [ 31.908888] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.909414] do_vmi_munmap+0x1f1/0x2b0 [ 31.909869] __vm_munmap+0x138/0x3a0 [ 31.910317] __x64_sys_munmap+0x59/0x80 [ 31.910787] do_syscall_64+0x3f/0x90 [ 31.911232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.911830] [ 31.912032] The buggy address belongs to the object at ffff88800c97dd98 [ 31.912032] which belongs to the cache vm_area_struct of size 168 [ 31.913393] The buggy address is located 88 bytes inside of [ 31.913393] freed 168-byte region [ffff88800c97dd98, ffff88800c97de40) [ 31.914726] [ 31.914933] The buggy address belongs to the physical page: [ 31.915548] page:00000000bf6aa47c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc97d [ 31.916561] memcg:ffff88800c56d201 [ 31.916965] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.917569] page_type: 0xffffffff() [ 31.917993] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.918856] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c56d201 [ 31.919706] page dumped because: kasan: bad access detected [ 31.920321] [ 31.920524] Memory state around the buggy address: [ 31.921068] ffff88800c97dc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.921869] ffff88800c97dd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.922677] >ffff88800c97dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.923469] ^ [ 31.924221] ffff88800c97de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.925020] ffff88800c97de80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.925818] ================================================================== [ 31.926901] Disabling lock debugging due to kernel taint [ 33.710992] BUG: Bad rss-counter state mm:00000000fd012125 type:MM_FILEPAGES val:33 [ 33.712038] BUG: Bad rss-counter state mm:00000000fd012125 type:MM_ANONPAGES val:22 [ 34.166535] BUG: Bad rss-counter state mm:00000000cb80ee4d type:MM_FILEPAGES val:33 [ 34.167422] BUG: Bad rss-counter state mm:00000000cb80ee4d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15722' (ECDSA) to the list of known hosts. 2023/06/19 10:56:08 fuzzer started 2023/06/19 10:56:08 dialing manager at localhost:44161 2023/06/19 10:56:08 checking machine... 2023/06/19 10:56:08 checking revisions... [ 34.930983] kmemleak: Automatic memory scanning thread ended 2023/06/19 10:56:08 testing simple program... [ 34.990512] cgroup: Unknown subsys name 'net' [ 35.054799] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:56:06 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f326aa20cc0 CR3=000000000ff86000 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=2037303a36353a3031203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a36353a3031203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f074bc450b0 CR3=000000000ff86000 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=36353a3031203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383832 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000