syzkaller login: [ 34.195692] BUG: Bad rss-counter state mm:00000000ca4655c0 type:MM_FILEPAGES val:33 [ 34.196763] BUG: Bad rss-counter state mm:00000000ca4655c0 type:MM_ANONPAGES val:22 [ 34.362120] ================================================================== [ 34.363065] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.364034] Read of size 8 at addr ffff888016c2b5c8 by task sshd/219 [ 34.364841] [ 34.365165] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.366064] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.367103] Call Trace: [ 34.367432] [ 34.367724] dump_stack_lvl+0x91/0xf0 [ 34.368234] print_report+0xcc/0x620 [ 34.368749] ? __virt_addr_valid+0x102/0x340 [ 34.369327] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.369970] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.370612] kasan_report+0xbe/0xf0 [ 34.371107] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.371760] vma_interval_tree_remove+0xc75/0xec0 [ 34.372385] vma_prepare+0xc54/0x11a0 [ 34.372882] __split_vma+0x5af/0x950 [ 34.373365] ? __pfx___split_vma+0x10/0x10 [ 34.373913] ? find_held_lock+0x2c/0x110 [ 34.374459] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.375035] ? lock_is_held_type+0x9f/0x120 [ 34.375588] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.376220] ? mtree_range_walk+0x632/0x900 [ 34.376812] ? mas_walk+0x5c7/0x7c0 [ 34.377294] do_vmi_munmap+0x1f1/0x2b0 [ 34.377791] mmap_region+0x1f9/0x2660 [ 34.378294] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.378821] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.379572] ? __pfx_lock_acquire+0x10/0x10 [ 34.380128] ? __pfx_mmap_region+0x10/0x10 [ 34.380686] ? security_mmap_addr+0x7d/0xa0 [ 34.381237] ? get_unmapped_area+0x1f5/0x3f0 [ 34.381808] do_mmap+0x854/0xf00 [ 34.382257] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.382771] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.383351] ksys_mmap_pgoff+0x3af/0x500 [ 34.383885] do_syscall_64+0x3f/0x90 [ 34.384378] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.385050] RIP: 0033:0x7f5e3d3dbd82 [ 34.385524] 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 [ 34.387745] RSP: 002b:00007ffddbe58218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.388715] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5e3d3dbd82 [ 34.389595] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5e3c815000 [ 34.390468] RBP: 00007f5e3c815000 R08: 0000000000000009 R09: 0000000000001000 [ 34.391345] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e256214d90 [ 34.392229] R13: 00007ffddbe58230 R14: 00007ffddbe58260 R15: 00007ffddbe585c0 [ 34.393099] [ 34.393388] [ 34.393604] Allocated by task 212: [ 34.394032] kasan_save_stack+0x22/0x50 [ 34.394532] kasan_set_track+0x25/0x30 [ 34.395029] __kasan_slab_alloc+0x59/0x70 [ 34.395577] kmem_cache_alloc+0x16b/0x370 [ 34.396113] vm_area_dup+0x20/0x160 [ 34.396579] __split_vma+0x170/0x950 [ 34.397062] split_vma+0xc6/0x110 [ 34.397521] mprotect_fixup+0x8d2/0xb30 [ 34.398030] do_mprotect_pkey+0x87e/0xd40 [ 34.398560] __x64_sys_mprotect+0x78/0xc0 [ 34.399116] do_syscall_64+0x3f/0x90 [ 34.399622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.400282] [ 34.400500] Freed by task 202: [ 34.400909] kasan_save_stack+0x22/0x50 [ 34.401419] kasan_set_track+0x25/0x30 [ 34.401913] kasan_save_free_info+0x2b/0x50 [ 34.402450] __kasan_slab_free+0x10a/0x190 [ 34.402990] kmem_cache_free+0x10d/0x4d0 [ 34.403499] rcu_core+0x8c8/0x2860 [ 34.403939] __do_softirq+0x1b7/0x7d4 [ 34.404417] [ 34.404662] Last potentially related work creation: [ 34.405250] kasan_save_stack+0x22/0x50 [ 34.405758] __kasan_record_aux_stack+0x8e/0xa0 [ 34.406338] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.406984] remove_vma+0x139/0x170 [ 34.407448] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.408002] do_vmi_munmap+0x1f1/0x2b0 [ 34.408502] __vm_munmap+0x138/0x3a0 [ 34.408985] __x64_sys_munmap+0x59/0x80 [ 34.409495] do_syscall_64+0x3f/0x90 [ 34.409980] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.410627] [ 34.410843] The buggy address belongs to the object at ffff888016c2b570 [ 34.410843] which belongs to the cache vm_area_struct of size 168 [ 34.412308] The buggy address is located 88 bytes inside of [ 34.412308] freed 168-byte region [ffff888016c2b570, ffff888016c2b618) [ 34.413730] [ 34.413950] The buggy address belongs to the physical page: [ 34.414621] page:0000000011cb500c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c2b [ 34.415723] memcg:ffff88800d5cc001 [ 34.416150] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.416819] page_type: 0xffffffff() [ 34.417277] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.418199] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d5cc001 [ 34.419113] page dumped because: kasan: bad access detected [ 34.419778] [ 34.420004] Memory state around the buggy address: [ 34.420604] ffff888016c2b480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.421458] ffff888016c2b500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 34.422306] >ffff888016c2b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.423157] ^ [ 34.423817] ffff888016c2b600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 34.424677] ffff888016c2b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.425526] ================================================================== [ 34.426486] Disabling lock debugging due to kernel taint [ 36.040763] BUG: Bad rss-counter state mm:00000000083d8047 type:MM_FILEPAGES val:33 [ 36.042067] BUG: Bad rss-counter state mm:00000000083d8047 type:MM_ANONPAGES val:22 [ 36.387236] BUG: Bad rss-counter state mm:00000000f195aef4 type:MM_FILEPAGES val:33 [ 36.388274] BUG: Bad rss-counter state mm:00000000f195aef4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27273' (ECDSA) to the list of known hosts. 2023/06/20 03:07:52 fuzzer started 2023/06/20 03:07:53 dialing manager at localhost:44161 2023/06/20 03:07:53 checking machine... 2023/06/20 03:07:53 checking revisions... [ 37.097177] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:07:53 testing simple program... [ 37.154976] cgroup: Unknown subsys name 'net' [ 37.208432] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:07:49 Registers: info registers vcpu 0 RAX=800000001844c025 RBX=ffffea0000611300 RCX=ffffffff8170c01d RDX=ffffed10035696df RSI=0000000000000008 RDI=ffff88801ab4b6f0 RBP=0000000000000000 RSP=ffff888016f77798 R8 =0000000000000001 R9 =ffffed10035696de R10=ffff88801ab4b6f7 R11=0000000000000000 R12=800000001844c025 R13=00007f3fa70df000 R14=ffff88801ab4b6f0 R15=dffffc0000000000 RIP=ffffffff8170c022 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 00007f3fa7118900 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=00007f3fa70e2008 CR3=0000000016e0c000 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=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 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=00007f6f3b505530 CR3=000000000ea72000 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=2032353a37303a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a37303a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000