syzkaller login: [ 65.791950] BUG: Bad rss-counter state mm:00000000ae224fe6 type:MM_FILEPAGES val:33 [ 65.793331] BUG: Bad rss-counter state mm:00000000ae224fe6 type:MM_ANONPAGES val:22 [ 65.967337] ================================================================== [ 65.968295] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 65.969546] Read of size 8 at addr ffff888016707798 by task sshd/228 [ 65.970536] [ 65.970828] CPU: 1 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 65.971925] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 65.973169] Call Trace: [ 65.973563] <TASK> [ 65.973928] dump_stack_lvl+0x91/0xf0 [ 65.974437] print_report+0xcc/0x620 [ 65.974955] ? __virt_addr_valid+0x102/0x340 [ 65.975525] ? vma_interval_tree_remove+0xc75/0xec0 [ 65.976196] ? vma_interval_tree_remove+0xc75/0xec0 [ 65.976854] kasan_report+0xbe/0xf0 [ 65.977361] ? vma_interval_tree_remove+0xc75/0xec0 [ 65.978009] vma_interval_tree_remove+0xc75/0xec0 [ 65.978640] vma_prepare+0xc54/0x11a0 [ 65.979151] __split_vma+0x5af/0x950 [ 65.979637] ? __pfx___split_vma+0x10/0x10 [ 65.980198] ? find_held_lock+0x2c/0x110 [ 65.980741] do_vmi_align_munmap+0x2ba/0x11f0 [ 65.981352] ? lock_is_held_type+0x9f/0x120 [ 65.981930] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 65.982564] ? mtree_range_walk+0x632/0x900 [ 65.983157] ? mas_walk+0x5c7/0x7c0 [ 65.983647] do_vmi_munmap+0x1f1/0x2b0 [ 65.984176] mmap_region+0x1f9/0x2660 [ 65.984681] ? vm_mmap_pgoff+0x15c/0x3a0 [ 65.985260] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 65.986017] ? __pfx_lock_acquire+0x10/0x10 [ 65.986574] ? __pfx_mmap_region+0x10/0x10 [ 65.987150] ? security_mmap_addr+0x7d/0xa0 [ 65.987706] ? get_unmapped_area+0x1f5/0x3f0 [ 65.988289] do_mmap+0x854/0xf00 [ 65.988752] vm_mmap_pgoff+0x1a6/0x3a0 [ 65.989292] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 65.989880] ksys_mmap_pgoff+0x3af/0x500 [ 65.990427] do_syscall_64+0x3f/0x90 [ 65.990933] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 65.991634] RIP: 0033:0x7f03d2e23d82 [ 65.992126] 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 [ 65.994373] RSP: 002b:00007ffd23ded0c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 65.995333] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f03d2e23d82 [ 65.996223] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f03d225d000 [ 65.997103] RBP: 00007f03d225d000 R08: 0000000000000009 R09: 0000000000001000 [ 65.998019] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d6fb49ff60 [ 65.998915] R13: 00007ffd23ded0e0 R14: 00007ffd23ded110 R15: 00007ffd23ded470 [ 65.999822] </TASK> [ 66.000125] [ 66.000367] Allocated by task 219: [ 66.000812] kasan_save_stack+0x22/0x50 [ 66.001372] kasan_set_track+0x25/0x30 [ 66.001887] __kasan_slab_alloc+0x59/0x70 [ 66.002444] kmem_cache_alloc+0x16b/0x370 [ 66.002978] vm_area_dup+0x20/0x160 [ 66.003466] __split_vma+0x170/0x950 [ 66.003953] split_vma+0xc6/0x110 [ 66.004428] mprotect_fixup+0x8d2/0xb30 [ 66.004952] do_mprotect_pkey+0x87e/0xd40 [ 66.005533] __x64_sys_mprotect+0x78/0xc0 [ 66.006080] do_syscall_64+0x3f/0x90 [ 66.006584] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.007249] [ 66.007483] Freed by task 219: [ 66.007890] kasan_save_stack+0x22/0x50 [ 66.008422] kasan_set_track+0x25/0x30 [ 66.008952] kasan_save_free_info+0x2b/0x50 [ 66.009538] __kasan_slab_free+0x10a/0x190 [ 66.010095] kmem_cache_free+0x10d/0x4d0 [ 66.010634] rcu_core+0x8c8/0x2860 [ 66.011093] __do_softirq+0x1b7/0x7d4 [ 66.011608] [ 66.011832] Last potentially related work creation: [ 66.012443] kasan_save_stack+0x22/0x50 [ 66.012984] __kasan_record_aux_stack+0x8e/0xa0 [ 66.013593] __call_rcu_common.constprop.0+0x6a/0xb90 [ 66.014281] remove_vma+0x139/0x170 [ 66.014765] do_vmi_align_munmap+0xd4a/0x11f0 [ 66.015340] do_vmi_munmap+0x1f1/0x2b0 [ 66.015863] __vm_munmap+0x138/0x3a0 [ 66.016349] __x64_sys_munmap+0x59/0x80 [ 66.016874] do_syscall_64+0x3f/0x90 [ 66.017390] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.018086] [ 66.018310] Second to last potentially related work creation: [ 66.019030] kasan_save_stack+0x22/0x50 [ 66.019554] __kasan_record_aux_stack+0x8e/0xa0 [ 66.020177] __call_rcu_common.constprop.0+0x6a/0xb90 [ 66.020865] remove_vma+0x139/0x170 [ 66.021362] do_vmi_align_munmap+0xd4a/0x11f0 [ 66.021957] do_vmi_munmap+0x1f1/0x2b0 [ 66.022460] mmap_region+0x1f9/0x2660 [ 66.022967] do_mmap+0x854/0xf00 [ 66.023420] vm_mmap_pgoff+0x1a6/0x3a0 [ 66.023948] ksys_mmap_pgoff+0x3af/0x500 [ 66.024474] do_syscall_64+0x3f/0x90 [ 66.024980] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.025668] [ 66.025909] The buggy address belongs to the object at ffff888016707740 [ 66.025909] which belongs to the cache vm_area_struct of size 168 [ 66.027445] The buggy address is located 88 bytes inside of [ 66.027445] freed 168-byte region [ffff888016707740, ffff8880167077e8) [ 66.028923] [ 66.029171] The buggy address belongs to the physical page: [ 66.029863] page:00000000f49abfca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16707 [ 66.031025] memcg:ffff88800e5f0901 [ 66.031466] flags: 0x100000000000200(slab|node=0|zone=1) [ 66.032157] page_type: 0xffffffff() [ 66.032624] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 66.033604] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5f0901 [ 66.034572] page dumped because: kasan: bad access detected [ 66.035271] [ 66.035493] Memory state around the buggy address: [ 66.036096] ffff888016707680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 66.037006] ffff888016707700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 66.037916] >ffff888016707780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 66.038822] ^ [ 66.039349] ffff888016707800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 66.040245] ffff888016707880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 66.041153] ================================================================== [ 66.042504] Disabling lock debugging due to kernel taint [ 68.486565] BUG: Bad rss-counter state mm:000000007f754349 type:MM_FILEPAGES val:33 [ 68.488008] BUG: Bad rss-counter state mm:000000007f754349 type:MM_ANONPAGES val:22 [ 69.021205] BUG: Bad rss-counter state mm:0000000020a9a7dc type:MM_FILEPAGES val:33 [ 69.022354] BUG: Bad rss-counter state mm:0000000020a9a7dc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55669' (ECDSA) to the list of known hosts. 2023/06/20 11:37:05 fuzzer started 2023/06/20 11:37:05 dialing manager at localhost:36067 2023/06/20 11:37:05 checking machine... 2023/06/20 11:37:05 checking revisions... [ 69.664160] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:37:05 testing simple program... [ 69.723264] cgroup: Unknown subsys name 'net' [ 69.783392] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:37:04 Registers: info registers vcpu 0 RAX=ffffffff813ad720 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888019877601 RSI=ffff888019877648 RDI=ffff888019877600 RBP=ffff888019877600 RSP=ffff8880198774e8 R8 =ffffffff8608a55a R9 =ffff8880198775e8 R10=0000000000038001 R11=0000000000003c0d R12=ffff888019877608 R13=ffff8880198775f0 R14=ffff888019877650 R15=ffff8880198775a8 RIP=ffffffff81131049 RFL=00000202 [-------] 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 00007f252ab79700 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=00007f88576d5630 CR3=0000000016a14000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3733325b646873732034303a3733 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323737 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=dffffc0000000000 RBX=ffff88806cf3a360 RCX=1ffff1100d9e745c RDX=1ffff11001ef72ce RSI=ffff88800f7b97a0 RDI=ffff88806cf3a380 RBP=ffff88800f7b9670 RSP=ffff8880146d7a00 R8 =ffffffff85616740 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff81845e00 R13=ffff88806cf3a3a8 R14=ffff88806cf3a2c0 R15=0000000000000000 RIP=ffffffff81380745 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 00007f4db5f44900 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=00007f4db5f23020 CR3=000000001783e000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000