syzkaller login: [ 31.255338] BUG: Bad rss-counter state mm:00000000bee2e7f4 type:MM_FILEPAGES val:33 [ 31.256721] BUG: Bad rss-counter state mm:00000000bee2e7f4 type:MM_ANONPAGES val:22 [ 31.297097] ================================================================== [ 31.298173] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.299223] Read of size 8 at addr ffff88800f5a2b38 by task sshd/220 [ 31.300029] [ 31.300259] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.301198] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.302233] Call Trace: [ 31.302566] [ 31.302863] dump_stack_lvl+0x91/0xf0 [ 31.303376] print_report+0xcc/0x620 [ 31.303880] ? __virt_addr_valid+0x102/0x340 [ 31.304453] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.305092] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.305753] kasan_report+0xbe/0xf0 [ 31.306248] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.306892] vma_interval_tree_remove+0xc75/0xec0 [ 31.307513] vma_prepare+0xc54/0x11a0 [ 31.308014] __split_vma+0x5af/0x950 [ 31.308507] ? __pfx___split_vma+0x10/0x10 [ 31.309056] ? find_held_lock+0x2c/0x110 [ 31.309613] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.310201] ? lock_is_held_type+0x9f/0x120 [ 31.310756] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.311390] ? mtree_range_walk+0x632/0x900 [ 31.311961] ? mas_walk+0x5c7/0x7c0 [ 31.312453] do_vmi_munmap+0x1f1/0x2b0 [ 31.312967] mmap_region+0x1f9/0x2660 [ 31.313480] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.314011] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.314758] ? __pfx_lock_acquire+0x10/0x10 [ 31.315309] ? __pfx_mmap_region+0x10/0x10 [ 31.315862] ? security_mmap_addr+0x7d/0xa0 [ 31.316422] ? get_unmapped_area+0x1f5/0x3f0 [ 31.316991] do_mmap+0x854/0xf00 [ 31.317478] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.317995] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.318581] ksys_mmap_pgoff+0x3af/0x500 [ 31.319095] do_syscall_64+0x3f/0x90 [ 31.319589] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.320270] RIP: 0033:0x7fcd3a4ced82 [ 31.320753] 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 [ 31.323005] RSP: 002b:00007fff4ae546b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.323965] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcd3a4ced82 [ 31.324863] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcd39908000 [ 31.325755] RBP: 00007fcd39908000 R08: 0000000000000009 R09: 0000000000001000 [ 31.326652] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561e44802b20 [ 31.327536] R13: 00007fff4ae546d0 R14: 00007fff4ae54700 R15: 00007fff4ae54a60 [ 31.328397] [ 31.328705] [ 31.328930] Allocated by task 213: [ 31.329403] kasan_save_stack+0x22/0x50 [ 31.329933] kasan_set_track+0x25/0x30 [ 31.330445] __kasan_slab_alloc+0x59/0x70 [ 31.330991] kmem_cache_alloc+0x16b/0x370 [ 31.331534] vm_area_dup+0x20/0x160 [ 31.332018] __split_vma+0x170/0x950 [ 31.332496] split_vma+0xc6/0x110 [ 31.332933] mprotect_fixup+0x8d2/0xb30 [ 31.333465] do_mprotect_pkey+0x87e/0xd40 [ 31.334004] __x64_sys_mprotect+0x78/0xc0 [ 31.334523] do_syscall_64+0x3f/0x90 [ 31.335014] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.335687] [ 31.335911] Freed by task 213: [ 31.336327] kasan_save_stack+0x22/0x50 [ 31.336849] kasan_set_track+0x25/0x30 [ 31.337380] kasan_save_free_info+0x2b/0x50 [ 31.337933] __kasan_slab_free+0x10a/0x190 [ 31.338491] kmem_cache_free+0x10d/0x4d0 [ 31.339023] rcu_core+0x8c8/0x2860 [ 31.339484] __do_softirq+0x1b7/0x7d4 [ 31.339978] [ 31.340204] Last potentially related work creation: [ 31.340817] kasan_save_stack+0x22/0x50 [ 31.341352] __kasan_record_aux_stack+0x8e/0xa0 [ 31.341955] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.342629] remove_vma+0x139/0x170 [ 31.343098] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.343683] do_vmi_munmap+0x1f1/0x2b0 [ 31.344188] __vm_munmap+0x138/0x3a0 [ 31.344680] __x64_sys_munmap+0x59/0x80 [ 31.345225] do_syscall_64+0x3f/0x90 [ 31.345718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.346382] [ 31.346604] The buggy address belongs to the object at ffff88800f5a2ae0 [ 31.346604] which belongs to the cache vm_area_struct of size 168 [ 31.348132] The buggy address is located 88 bytes inside of [ 31.348132] freed 168-byte region [ffff88800f5a2ae0, ffff88800f5a2b88) [ 31.349622] [ 31.349842] The buggy address belongs to the physical page: [ 31.350537] page:000000006d5df728 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf5a2 [ 31.351676] memcg:ffff88800df25101 [ 31.352124] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.352855] page_type: 0xffffffff() [ 31.353336] raw: 0100000000000200 ffff88800879fc80 ffffea0000268d00 dead000000000007 [ 31.354300] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df25101 [ 31.355239] page dumped because: kasan: bad access detected [ 31.355938] [ 31.356161] Memory state around the buggy address: [ 31.356780] ffff88800f5a2a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.357706] ffff88800f5a2a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.358602] >ffff88800f5a2b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.359490] ^ [ 31.360125] ffff88800f5a2b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.361011] ffff88800f5a2c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.361919] ================================================================== [ 31.363074] Disabling lock debugging due to kernel taint [ 33.328547] BUG: Bad rss-counter state mm:00000000da991de7 type:MM_FILEPAGES val:33 [ 33.329544] BUG: Bad rss-counter state mm:00000000da991de7 type:MM_ANONPAGES val:22 [ 33.863868] BUG: Bad rss-counter state mm:00000000b5ba2ed3 type:MM_FILEPAGES val:33 [ 33.865029] BUG: Bad rss-counter state mm:00000000b5ba2ed3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24703' (ECDSA) to the list of known hosts. 2023/06/20 04:00:33 fuzzer started 2023/06/20 04:00:34 dialing manager at localhost:44161 2023/06/20 04:00:34 checking machine... 2023/06/20 04:00:34 checking revisions... [ 34.538692] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:00:34 testing simple program... [ 34.588853] cgroup: Unknown subsys name 'net' [ 34.626982] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:00:33 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000040 RCX=0000000000000000 RDX=1ffffffff0a828c8 RSI=ffffffff818a525a RDI=ffff88800d96f798 RBP=ffff88800d96f6a8 RSP=ffff88800d96f610 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00676f6c7379732f R12=ffff88800d96f750 R13=00000000000002fa R14=ffffffff85414640 R15=0000000000000000 RIP=ffffffff818a52b4 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 00007f85d2568900 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=00007f81dcf61650 CR3=000000000ca1a000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=b2374f85c4153fc000000000000ae988 XMM05=a49e7407ca26af150000000000135860 XMM06=9d67e47d3dc376af0000000000134290 XMM07=fb795ef6d65770560000000000124a78 XMM08=4f5453444600273d67736d000d0a0920 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=0000000000000001 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=00007ffcdc015c58 CR3=000000000e488000 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=2033333a30303a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a30303a3430203032 XMM08=00007fdc3c031cf00000005c00000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000