syzkaller login: [ 28.652789] BUG: Bad rss-counter state mm:000000004c68c77f type:MM_FILEPAGES val:33 [ 28.653834] BUG: Bad rss-counter state mm:000000004c68c77f type:MM_ANONPAGES val:22 [ 28.829853] ================================================================== [ 28.831029] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.832322] Read of size 8 at addr ffff88800c55a058 by task sshd/219 [ 28.833425] [ 28.833714] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.834790] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.835869] Call Trace: [ 28.836235] [ 28.836561] dump_stack_lvl+0x91/0xf0 [ 28.837134] print_report+0xcc/0x620 [ 28.837690] ? __virt_addr_valid+0x102/0x340 [ 28.838325] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.839037] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.839740] kasan_report+0xbe/0xf0 [ 28.840286] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.841006] vma_interval_tree_remove+0xc75/0xec0 [ 28.841683] vma_prepare+0xc54/0x11a0 [ 28.842224] __split_vma+0x5af/0x950 [ 28.842764] ? __pfx___split_vma+0x10/0x10 [ 28.843360] ? find_held_lock+0x2c/0x110 [ 28.843959] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.844601] ? lock_is_held_type+0x9f/0x120 [ 28.845234] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.845923] ? mtree_range_walk+0x632/0x900 [ 28.846550] ? mas_walk+0x5c7/0x7c0 [ 28.847087] do_vmi_munmap+0x1f1/0x2b0 [ 28.847646] mmap_region+0x1f9/0x2660 [ 28.848192] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.848780] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.849589] ? __pfx_lock_acquire+0x10/0x10 [ 28.850198] ? __pfx_mmap_region+0x10/0x10 [ 28.850804] ? security_mmap_addr+0x7d/0xa0 [ 28.851408] ? get_unmapped_area+0x1f5/0x3f0 [ 28.852027] do_mmap+0x854/0xf00 [ 28.852533] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.853106] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.853745] ksys_mmap_pgoff+0x3af/0x500 [ 28.854322] do_syscall_64+0x3f/0x90 [ 28.854864] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.855598] RIP: 0033:0x7fd807eb4d82 [ 28.856114] 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 [ 28.858514] RSP: 002b:00007ffff0c5f758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.859532] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd807eb4d82 [ 28.860482] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd8072ee000 [ 28.861454] RBP: 00007fd8072ee000 R08: 0000000000000009 R09: 0000000000001000 [ 28.862402] R10: 0000000000000812 R11: 0000000000000206 R12: 00005619ee00dec0 [ 28.863355] R13: 00007ffff0c5f770 R14: 00007ffff0c5f7a0 R15: 00007ffff0c5fb00 [ 28.864318] [ 28.864650] [ 28.864913] Allocated by task 212: [ 28.865399] kasan_save_stack+0x22/0x50 [ 28.865972] kasan_set_track+0x25/0x30 [ 28.866528] __kasan_slab_alloc+0x59/0x70 [ 28.867118] kmem_cache_alloc+0x16b/0x370 [ 28.867702] vm_area_dup+0x20/0x160 [ 28.868211] __split_vma+0x170/0x950 [ 28.868742] split_vma+0xc6/0x110 [ 28.869238] mprotect_fixup+0x8d2/0xb30 [ 28.869798] do_mprotect_pkey+0x87e/0xd40 [ 28.870377] __x64_sys_mprotect+0x78/0xc0 [ 28.870953] do_syscall_64+0x3f/0x90 [ 28.871487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.872205] [ 28.872444] Freed by task 19: [ 28.872884] kasan_save_stack+0x22/0x50 [ 28.873450] kasan_set_track+0x25/0x30 [ 28.874067] kasan_save_free_info+0x2b/0x50 [ 28.874664] __kasan_slab_free+0x10a/0x190 [ 28.875261] kmem_cache_free+0x10d/0x4d0 [ 28.875829] rcu_core+0x8c8/0x2860 [ 28.876324] __do_softirq+0x1b7/0x7d4 [ 28.876871] [ 28.877112] Last potentially related work creation: [ 28.877761] kasan_save_stack+0x22/0x50 [ 28.878328] __kasan_record_aux_stack+0x8e/0xa0 [ 28.878973] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.879693] remove_vma+0x139/0x170 [ 28.880201] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.880839] do_vmi_munmap+0x1f1/0x2b0 [ 28.881377] __vm_munmap+0x138/0x3a0 [ 28.881900] __x64_sys_munmap+0x59/0x80 [ 28.882455] do_syscall_64+0x3f/0x90 [ 28.882975] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.883687] [ 28.883922] The buggy address belongs to the object at ffff88800c55a000 [ 28.883922] which belongs to the cache vm_area_struct of size 168 [ 28.885570] The buggy address is located 88 bytes inside of [ 28.885570] freed 168-byte region [ffff88800c55a000, ffff88800c55a0a8) [ 28.887135] [ 28.887372] The buggy address belongs to the physical page: [ 28.888106] page:00000000a71ebd66 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc55a [ 28.889324] memcg:ffff88800c55b001 [ 28.889800] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.890516] page_type: 0xffffffff() [ 28.891018] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.892038] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c55b001 [ 28.893038] page dumped because: kasan: bad access detected [ 28.893773] [ 28.894010] Memory state around the buggy address: [ 28.894651] ffff88800c559f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.895601] ffff88800c559f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.896557] >ffff88800c55a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.897503] ^ [ 28.898316] ffff88800c55a080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 28.899269] ffff88800c55a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.900216] ================================================================== [ 28.901388] Disabling lock debugging due to kernel taint [ 31.144790] BUG: Bad rss-counter state mm:0000000012c055bc type:MM_FILEPAGES val:33 [ 31.145788] BUG: Bad rss-counter state mm:0000000012c055bc type:MM_ANONPAGES val:22 [ 31.602368] BUG: Bad rss-counter state mm:00000000adf318ab type:MM_FILEPAGES val:33 [ 31.603918] BUG: Bad rss-counter state mm:00000000adf318ab type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26202' (ECDSA) to the list of known hosts. 2023/06/20 21:15:57 fuzzer started 2023/06/20 21:15:58 dialing manager at localhost:36067 2023/06/20 21:15:58 checking machine... 2023/06/20 21:15:58 checking revisions... [ 32.357210] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:15:58 testing simple program... [ 32.422709] cgroup: Unknown subsys name 'net' [ 32.480953] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:15:57 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=ffff8880160351c0 RSI=ffffffff814c857a RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88800d9872c0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=0000000000400cc0 RIP=ffffffff814c0871 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 00007fa3a77b1900 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=00007fa3a6ba5eb0 CR3=0000000014596000 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=f60bba5936d6e85d00000000000ae988 XMM05=a18622310516056a0000000000132818 XMM06=806171799158d96700000000001318b8 XMM07=fb795ef6d65770560000000000121b88 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff815344fa RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff84511f81 RSP=ffff88801c647f10 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=000000000000002d R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff815342c2 RFL=00000002 [-------] 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 00007f59ef04b900 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=00007ffed7e4e000 CR3=0000000016b54000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000