syzkaller login: [ 38.702801] BUG: Bad rss-counter state mm:0000000056e3aeac type:MM_FILEPAGES val:33 [ 38.703986] BUG: Bad rss-counter state mm:0000000056e3aeac type:MM_ANONPAGES val:22 [ 38.862794] ================================================================== [ 38.863901] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.865237] Read of size 8 at addr ffff88801a519880 by task sshd/219 [ 38.866013] [ 38.866240] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.867103] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.868083] Call Trace: [ 38.868440] <TASK> [ 38.868728] dump_stack_lvl+0x91/0xf0 [ 38.869225] print_report+0xcc/0x620 [ 38.869736] ? __virt_addr_valid+0x102/0x340 [ 38.870327] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.870958] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.871598] kasan_report+0xbe/0xf0 [ 38.872090] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.872746] vma_interval_tree_remove+0xc75/0xec0 [ 38.873353] vma_prepare+0xc54/0x11a0 [ 38.873847] __split_vma+0x5af/0x950 [ 38.874322] ? __pfx___split_vma+0x10/0x10 [ 38.874858] ? find_held_lock+0x2c/0x110 [ 38.875386] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.875965] ? lock_is_held_type+0x9f/0x120 [ 38.876559] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.877170] ? mtree_range_walk+0x632/0x900 [ 38.877743] ? mas_walk+0x5c7/0x7c0 [ 38.878224] do_vmi_munmap+0x1f1/0x2b0 [ 38.878744] mmap_region+0x1f9/0x2660 [ 38.879229] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.879761] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.880493] ? __pfx_lock_acquire+0x10/0x10 [ 38.881042] ? __pfx_mmap_region+0x10/0x10 [ 38.881588] ? security_mmap_addr+0x7d/0xa0 [ 38.882130] ? get_unmapped_area+0x1f5/0x3f0 [ 38.882704] do_mmap+0x854/0xf00 [ 38.883155] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.883672] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.884257] ksys_mmap_pgoff+0x3af/0x500 [ 38.884779] do_syscall_64+0x3f/0x90 [ 38.885265] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.885928] RIP: 0033:0x7fc7cd7e7d82 [ 38.886390] 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 [ 38.888570] RSP: 002b:00007ffdd38a8148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.889485] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc7cd7e7d82 [ 38.890347] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc7ccc21000 [ 38.891215] RBP: 00007fc7ccc21000 R08: 0000000000000009 R09: 0000000000001000 [ 38.892086] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bfc47a9ec0 [ 38.892977] R13: 00007ffdd38a8160 R14: 00007ffdd38a8190 R15: 00007ffdd38a84f0 [ 38.893866] </TASK> [ 38.894163] [ 38.894386] Allocated by task 212: [ 38.894813] kasan_save_stack+0x22/0x50 [ 38.895339] kasan_set_track+0x25/0x30 [ 38.895842] __kasan_slab_alloc+0x59/0x70 [ 38.896404] kmem_cache_alloc+0x16b/0x370 [ 38.896925] vm_area_dup+0x20/0x160 [ 38.897394] __split_vma+0x170/0x950 [ 38.897865] split_vma+0xc6/0x110 [ 38.898348] mprotect_fixup+0x8d2/0xb30 [ 38.898872] do_mprotect_pkey+0x87e/0xd40 [ 38.899428] __x64_sys_mprotect+0x78/0xc0 [ 38.899975] do_syscall_64+0x3f/0x90 [ 38.900491] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.901170] [ 38.901395] Freed by task 212: [ 38.901801] kasan_save_stack+0x22/0x50 [ 38.902336] kasan_set_track+0x25/0x30 [ 38.902840] kasan_save_free_info+0x2b/0x50 [ 38.903416] __kasan_slab_free+0x10a/0x190 [ 38.903963] kmem_cache_free+0x10d/0x4d0 [ 38.904523] rcu_core+0x8c8/0x2860 [ 38.904982] __do_softirq+0x1b7/0x7d4 [ 38.905492] [ 38.905713] Last potentially related work creation: [ 38.906427] kasan_save_stack+0x22/0x50 [ 38.906944] __kasan_record_aux_stack+0x8e/0xa0 [ 38.907547] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.908230] remove_vma+0x139/0x170 [ 38.908698] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.909291] do_vmi_munmap+0x1f1/0x2b0 [ 38.909808] __vm_munmap+0x138/0x3a0 [ 38.910324] __x64_sys_munmap+0x59/0x80 [ 38.910851] do_syscall_64+0x3f/0x90 [ 38.911368] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.912048] [ 38.912284] The buggy address belongs to the object at ffff88801a519828 [ 38.912284] which belongs to the cache vm_area_struct of size 168 [ 38.913887] The buggy address is located 88 bytes inside of [ 38.913887] freed 168-byte region [ffff88801a519828, ffff88801a5198d0) [ 38.915418] [ 38.915650] The buggy address belongs to the physical page: [ 38.916384] page:0000000026e4ec8b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a519 [ 38.917569] memcg:ffff88801a492d01 [ 38.918018] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.918715] page_type: 0xffffffff() [ 38.919187] raw: 0100000000000200 ffff8880087a0c80 ffffea0000694740 dead000000000008 [ 38.920185] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a492d01 [ 38.921160] page dumped because: kasan: bad access detected [ 38.921878] [ 38.922106] Memory state around the buggy address: [ 38.922741] ffff88801a519780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.923640] ffff88801a519800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.924533] >ffff88801a519880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.925444] ^ [ 38.925880] ffff88801a519900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.926788] ffff88801a519980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 38.927683] ================================================================== [ 38.928725] Disabling lock debugging due to kernel taint [ 41.099844] BUG: Bad rss-counter state mm:000000002e9de1b8 type:MM_FILEPAGES val:33 [ 41.100848] BUG: Bad rss-counter state mm:000000002e9de1b8 type:MM_ANONPAGES val:22 [ 41.628345] BUG: Bad rss-counter state mm:000000000988123e type:MM_FILEPAGES val:33 [ 41.629770] BUG: Bad rss-counter state mm:000000000988123e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30820' (ECDSA) to the list of known hosts. 2023/06/20 12:44:42 fuzzer started 2023/06/20 12:44:43 dialing manager at localhost:36067 2023/06/20 12:44:43 checking machine... 2023/06/20 12:44:43 checking revisions... [ 42.383486] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:44:43 testing simple program... [ 42.436994] cgroup: Unknown subsys name 'net' [ 42.474362] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:44:42 Registers: info registers vcpu 0 RAX=ffff888018e20000 RBX=ffff888018e27580 RCX=0000000000000001 RDX=ffff888018e28000 RSI=ffff888018e27580 RDI=ffff888018e274f8 RBP=dffffc0000000000 RSP=ffff888018e27498 R8 =0000000000000001 R9 =ffff888018e27528 R10=0000000000038001 R11=0000000000003c0d R12=ffffed10031c4e9f R13=ffffed10031c4e9e R14=ffff888018e27530 R15=ffff888018e274e8 RIP=ffffffff81132fc3 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 00007f85f8bcb900 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=00007ffe5552b6f8 CR3=000000000e3b8000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=ffffffff85df3d88 RCX=ffffffff81745be8 RDX=0000000000000000 RSI=ffffffff86129a96 RDI=ffffffff85df3d78 RBP=ffffffff85df3d88 RSP=ffff888018f2f0a0 R8 =ffffffff86129a96 R9 =ffff888018f2f198 R10=0000000000038001 R11=000000000001e4ed R12=ffffffff85df3d88 R13=ffffffff85df3d78 R14=ffffffff85df3d84 R15=dffffc0000000000 RIP=ffffffff8112fc8c RFL=00000206 [-----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 00007efcd8567900 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=00007efcd8546020 CR3=0000000017ff6000 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