syzkaller login: [ 42.645409] BUG: Bad rss-counter state mm:00000000fc4529d4 type:MM_FILEPAGES val:33 [ 42.646403] BUG: Bad rss-counter state mm:00000000fc4529d4 type:MM_ANONPAGES val:22 [ 42.807030] ================================================================== [ 42.807949] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.808889] Read of size 8 at addr ffff88801758b880 by task sshd/227 [ 42.809800] [ 42.810022] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.810921] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.811913] Call Trace: [ 42.812235] [ 42.812522] dump_stack_lvl+0x91/0xf0 [ 42.813018] print_report+0xcc/0x620 [ 42.813515] ? __virt_addr_valid+0x102/0x340 [ 42.814076] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.814706] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.815339] kasan_report+0xbe/0xf0 [ 42.815825] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.816448] vma_interval_tree_remove+0xc75/0xec0 [ 42.817059] vma_prepare+0xc54/0x11a0 [ 42.817542] __split_vma+0x5af/0x950 [ 42.818019] ? __pfx___split_vma+0x10/0x10 [ 42.818573] ? find_held_lock+0x2c/0x110 [ 42.819103] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.819669] ? lock_is_held_type+0x9f/0x120 [ 42.820216] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.820829] ? mtree_range_walk+0x632/0x900 [ 42.821379] ? mas_walk+0x5c7/0x7c0 [ 42.821851] do_vmi_munmap+0x1f1/0x2b0 [ 42.822354] mmap_region+0x1f9/0x2660 [ 42.822839] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.823349] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.824076] ? __pfx_lock_acquire+0x10/0x10 [ 42.824612] ? __pfx_mmap_region+0x10/0x10 [ 42.825143] ? security_mmap_addr+0x7d/0xa0 [ 42.825678] ? get_unmapped_area+0x1f5/0x3f0 [ 42.826263] do_mmap+0x854/0xf00 [ 42.826704] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.827194] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.827755] ksys_mmap_pgoff+0x3af/0x500 [ 42.828264] do_syscall_64+0x3f/0x90 [ 42.828739] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.829385] RIP: 0033:0x7f3a1338cd82 [ 42.829852] 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 [ 42.831992] RSP: 002b:00007ffe93dd8218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.832896] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3a1338cd82 [ 42.833743] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3a127c6000 [ 42.834600] RBP: 00007f3a127c6000 R08: 0000000000000009 R09: 0000000000001000 [ 42.835458] R10: 0000000000000812 R11: 0000000000000206 R12: 000055daa0ab7d90 [ 42.836308] R13: 00007ffe93dd8230 R14: 00007ffe93dd8260 R15: 00007ffe93dd85c0 [ 42.837164] [ 42.837453] [ 42.837668] Allocated by task 220: [ 42.838098] kasan_save_stack+0x22/0x50 [ 42.838624] kasan_set_track+0x25/0x30 [ 42.839118] __kasan_slab_alloc+0x59/0x70 [ 42.839646] kmem_cache_alloc+0x16b/0x370 [ 42.840163] vm_area_dup+0x20/0x160 [ 42.840616] __split_vma+0x170/0x950 [ 42.841082] split_vma+0xc6/0x110 [ 42.841531] mprotect_fixup+0x8d2/0xb30 [ 42.842036] do_mprotect_pkey+0x87e/0xd40 [ 42.842572] __x64_sys_mprotect+0x78/0xc0 [ 42.843095] do_syscall_64+0x3f/0x90 [ 42.843564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.844206] [ 42.844422] Freed by task 204: [ 42.844818] kasan_save_stack+0x22/0x50 [ 42.845325] kasan_set_track+0x25/0x30 [ 42.845824] kasan_save_free_info+0x2b/0x50 [ 42.846362] __kasan_slab_free+0x10a/0x190 [ 42.846899] kmem_cache_free+0x10d/0x4d0 [ 42.847410] rcu_core+0x8c8/0x2860 [ 42.847859] __do_softirq+0x1b7/0x7d4 [ 42.848337] [ 42.848554] Last potentially related work creation: [ 42.849142] kasan_save_stack+0x22/0x50 [ 42.849647] __kasan_record_aux_stack+0x8e/0xa0 [ 42.850275] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.850924] remove_vma+0x139/0x170 [ 42.851377] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.851936] do_vmi_munmap+0x1f1/0x2b0 [ 42.852421] __vm_munmap+0x138/0x3a0 [ 42.852888] __x64_sys_munmap+0x59/0x80 [ 42.853387] do_syscall_64+0x3f/0x90 [ 42.853856] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.854509] [ 42.854728] The buggy address belongs to the object at ffff88801758b828 [ 42.854728] which belongs to the cache vm_area_struct of size 168 [ 42.856202] The buggy address is located 88 bytes inside of [ 42.856202] freed 168-byte region [ffff88801758b828, ffff88801758b8d0) [ 42.857619] [ 42.857835] The buggy address belongs to the physical page: [ 42.858529] page:00000000337d4eb9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1758b [ 42.859634] memcg:ffff888019fa6501 [ 42.860061] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.860701] page_type: 0xffffffff() [ 42.861158] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 42.862085] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019fa6501 [ 42.863021] page dumped because: kasan: bad access detected [ 42.863674] [ 42.863894] Memory state around the buggy address: [ 42.864476] ffff88801758b780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 42.865343] ffff88801758b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 42.866208] >ffff88801758b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 42.867060] ^ [ 42.867479] ffff88801758b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.868337] ffff88801758b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 42.869180] ================================================================== [ 42.870159] Disabling lock debugging due to kernel taint [ 44.530513] BUG: Bad rss-counter state mm:00000000f50c00c6 type:MM_FILEPAGES val:33 [ 44.531501] BUG: Bad rss-counter state mm:00000000f50c00c6 type:MM_ANONPAGES val:22 [ 44.989523] BUG: Bad rss-counter state mm:00000000cacb7612 type:MM_FILEPAGES val:33 [ 44.990561] BUG: Bad rss-counter state mm:00000000cacb7612 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62815' (ECDSA) to the list of known hosts. 2023/06/19 11:37:57 fuzzer started 2023/06/19 11:37:57 dialing manager at localhost:44161 2023/06/19 11:37:57 checking machine... 2023/06/19 11:37:57 checking revisions... [ 45.738093] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:37:57 testing simple program... [ 45.786938] cgroup: Unknown subsys name 'net' [ 45.827378] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:37:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce28768 RCX=0000000000000000 RDX=1ffff1100d9c50ed RSI=0000000000000000 RDI=ffff88806ce39518 RBP=ffff88806ce09f50 RSP=ffff88806ce09ea0 R8 =ffff88806ce39750 R9 =ffff88806ce39660 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=ffff88806ce39d38 R14=ffff88806ce39eb8 R15=ffff8880084c1000 RIP=ffffffff812c20f4 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6e46039900 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=00007f6e4542d600 CR3=000000000dbbe000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d29f9ed148daf9cc00000000000ae988 XMM05=732f6a783c08bad400000000001366d0 XMM06=16bbfc4fa606b62500000000001351f8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888019dbd1c0 RSI=ffffffff81668855 RDI=0000000000000001 RBP=ffffea000069b9c0 RSP=ffff88801028fb08 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffffea000069b9c0 R14=ffff88801028fe00 R15=dffffc0000000000 RIP=ffffffff814c0800 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 00007f0d72701900 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=00007ffd59ca2000 CR3=000000000c910000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000