syzkaller login: [ 23.660892] BUG: Bad rss-counter state mm:000000005d855bdc type:MM_FILEPAGES val:33 [ 23.662217] BUG: Bad rss-counter state mm:000000005d855bdc type:MM_ANONPAGES val:22 [ 23.810300] ================================================================== [ 23.811360] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.812464] Read of size 8 at addr ffff88800ec065c8 by task sshd/220 [ 23.813603] [ 23.813862] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.814876] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.816064] Call Trace: [ 23.816441] [ 23.816756] dump_stack_lvl+0x91/0xf0 [ 23.817285] print_report+0xcc/0x620 [ 23.817772] ? __virt_addr_valid+0x102/0x340 [ 23.818319] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.818933] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.819543] kasan_report+0xbe/0xf0 [ 23.820028] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.820644] vma_interval_tree_remove+0xc75/0xec0 [ 23.821297] vma_prepare+0xc54/0x11a0 [ 23.821781] __split_vma+0x5af/0x950 [ 23.822254] ? __pfx___split_vma+0x10/0x10 [ 23.822784] ? find_held_lock+0x2c/0x110 [ 23.823307] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.823868] ? lock_is_held_type+0x9f/0x120 [ 23.824406] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.825045] ? mtree_range_walk+0x632/0x900 [ 23.825630] ? mas_walk+0x5c7/0x7c0 [ 23.826104] do_vmi_munmap+0x1f1/0x2b0 [ 23.826596] mmap_region+0x1f9/0x2660 [ 23.827074] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.827601] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.828311] ? __pfx_lock_acquire+0x10/0x10 [ 23.828856] ? __pfx_mmap_region+0x10/0x10 [ 23.829429] ? security_mmap_addr+0x7d/0xa0 [ 23.829966] ? get_unmapped_area+0x1f5/0x3f0 [ 23.830522] do_mmap+0x854/0xf00 [ 23.830961] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.831452] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.832014] ksys_mmap_pgoff+0x3af/0x500 [ 23.832518] do_syscall_64+0x3f/0x90 [ 23.833016] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.833695] RIP: 0033:0x7ff493806d82 [ 23.834154] 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 [ 23.836284] RSP: 002b:00007ffc2c18f9b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.837238] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff493806d82 [ 23.838097] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff492c40000 [ 23.838949] RBP: 00007ff492c40000 R08: 0000000000000009 R09: 0000000000001000 [ 23.839802] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555cdad99ec0 [ 23.840645] R13: 00007ffc2c18f9d0 R14: 00007ffc2c18fa00 R15: 00007ffc2c18fd60 [ 23.841550] [ 23.841841] [ 23.842059] Allocated by task 213: [ 23.842494] kasan_save_stack+0x22/0x50 [ 23.842998] kasan_set_track+0x25/0x30 [ 23.843489] __kasan_slab_alloc+0x59/0x70 [ 23.844013] kmem_cache_alloc+0x16b/0x370 [ 23.844537] vm_area_dup+0x20/0x160 [ 23.845003] __split_vma+0x170/0x950 [ 23.845508] split_vma+0xc6/0x110 [ 23.845947] mprotect_fixup+0x8d2/0xb30 [ 23.846448] do_mprotect_pkey+0x87e/0xd40 [ 23.846969] __x64_sys_mprotect+0x78/0xc0 [ 23.847485] do_syscall_64+0x3f/0x90 [ 23.847959] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.848598] [ 23.848838] Freed by task 13: [ 23.849250] kasan_save_stack+0x22/0x50 [ 23.849770] kasan_set_track+0x25/0x30 [ 23.850268] kasan_save_free_info+0x2b/0x50 [ 23.850803] __kasan_slab_free+0x10a/0x190 [ 23.851343] kmem_cache_free+0x10d/0x4d0 [ 23.851861] rcu_core+0x8c8/0x2860 [ 23.852317] __do_softirq+0x1b7/0x7d4 [ 23.852824] [ 23.853044] Last potentially related work creation: [ 23.853677] kasan_save_stack+0x22/0x50 [ 23.854183] __kasan_record_aux_stack+0x8e/0xa0 [ 23.854763] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.855444] remove_vma+0x139/0x170 [ 23.855903] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.856466] do_vmi_munmap+0x1f1/0x2b0 [ 23.856981] __vm_munmap+0x138/0x3a0 [ 23.857493] __x64_sys_munmap+0x59/0x80 [ 23.857999] do_syscall_64+0x3f/0x90 [ 23.858477] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.859127] [ 23.859340] Second to last potentially related work creation: [ 23.860022] kasan_save_stack+0x22/0x50 [ 23.860552] __kasan_record_aux_stack+0x8e/0xa0 [ 23.861142] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.861818] remove_vma+0x139/0x170 [ 23.862271] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.862830] do_vmi_munmap+0x1f1/0x2b0 [ 23.863330] mmap_region+0x1f9/0x2660 [ 23.863806] do_mmap+0x854/0xf00 [ 23.864234] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.864736] ksys_mmap_pgoff+0x3af/0x500 [ 23.865273] do_syscall_64+0x3f/0x90 [ 23.865760] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.866409] [ 23.866624] The buggy address belongs to the object at ffff88800ec06570 [ 23.866624] which belongs to the cache vm_area_struct of size 168 [ 23.868093] The buggy address is located 88 bytes inside of [ 23.868093] freed 168-byte region [ffff88800ec06570, ffff88800ec06618) [ 23.869559] [ 23.869780] The buggy address belongs to the physical page: [ 23.870437] page:0000000008855392 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec06 [ 23.871529] memcg:ffff88800e0c9901 [ 23.871952] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.872597] page_type: 0xffffffff() [ 23.873068] raw: 0100000000000200 ffff8880087a0c80 ffffea000067eec0 dead000000000006 [ 23.874020] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0c9901 [ 23.874922] page dumped because: kasan: bad access detected [ 23.875588] [ 23.875800] Memory state around the buggy address: [ 23.876389] ffff88800ec06480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.877317] ffff88800ec06500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 23.878171] >ffff88800ec06580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.879019] ^ [ 23.879681] ffff88800ec06600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 23.880540] ffff88800ec06680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.881434] ================================================================== [ 23.882361] Disabling lock debugging due to kernel taint [ 26.164199] BUG: Bad rss-counter state mm:00000000a143f2e5 type:MM_FILEPAGES val:33 [ 26.165287] BUG: Bad rss-counter state mm:00000000a143f2e5 type:MM_ANONPAGES val:22 [ 26.644496] BUG: Bad rss-counter state mm:000000003d186556 type:MM_FILEPAGES val:33 [ 26.645511] BUG: Bad rss-counter state mm:000000003d186556 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30716' (ECDSA) to the list of known hosts. 2023/06/20 21:22:26 fuzzer started 2023/06/20 21:22:26 dialing manager at localhost:36067 2023/06/20 21:22:26 checking machine... 2023/06/20 21:22:26 checking revisions... [ 27.426929] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:22:26 testing simple program... [ 27.471929] cgroup: Unknown subsys name 'net' [ 27.518393] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:22:26 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f8351bc9d90 CR3=000000000fb28000 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=2036323a32323a3132203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a32323a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000005 RCX=0000000000000000 RDX=0000000000000004 RSI=ffffffff8182e01d RDI=ffffe8ffffd12798 RBP=ffff88801a0c7000 RSP=ffff88800f8a7cb8 R8 =0000000000000000 R9 =fffff940000d7fb8 R10=ffffea00006bfdc7 R11=0000000000000000 R12=ffff88800fc2c000 R13=0000000000000001 R14=ffff88801a0c7000 R15=ffffea00006bfdc0 RIP=ffffffff8182dfa6 RFL=00000286 [--S--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f099299a900 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=00007ffd50a71ecc CR3=0000000019f2e000 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=00000000000000000000000000000000 XMM02=000000000000000000000000000000ff XMM03=3d3cff40c9315893d37535366a5a8058 XMM04=a697bc7a6336cde590439c94d9d423cd XMM05=000000000000000000000000000000ff XMM06=3d3cbc4063315893904335366a5a2358 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000