syzkaller login: [ 30.691010] BUG: Bad rss-counter state mm:000000000c348e8b type:MM_FILEPAGES val:33 [ 30.692061] BUG: Bad rss-counter state mm:000000000c348e8b type:MM_ANONPAGES val:22 [ 30.852776] ================================================================== [ 30.853685] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.854640] Read of size 8 at addr ffff888016468310 by task sshd/220 [ 30.855451] [ 30.855671] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.856677] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.857679] Call Trace: [ 30.858006] [ 30.858306] dump_stack_lvl+0x91/0xf0 [ 30.858808] print_report+0xcc/0x620 [ 30.859324] ? __virt_addr_valid+0x102/0x340 [ 30.859891] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.860533] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.861173] kasan_report+0xbe/0xf0 [ 30.861650] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.862277] vma_interval_tree_remove+0xc75/0xec0 [ 30.862885] vma_prepare+0xc54/0x11a0 [ 30.863373] __split_vma+0x5af/0x950 [ 30.863844] ? __pfx___split_vma+0x10/0x10 [ 30.864371] ? find_held_lock+0x2c/0x110 [ 30.864890] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.865456] ? lock_is_held_type+0x9f/0x120 [ 30.865999] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.866611] ? mtree_range_walk+0x632/0x900 [ 30.867158] ? mas_walk+0x5c7/0x7c0 [ 30.867666] do_vmi_munmap+0x1f1/0x2b0 [ 30.868163] mmap_region+0x1f9/0x2660 [ 30.868651] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.869173] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.869883] ? __pfx_lock_acquire+0x10/0x10 [ 30.870428] ? __pfx_mmap_region+0x10/0x10 [ 30.870974] ? security_mmap_addr+0x7d/0xa0 [ 30.871526] ? get_unmapped_area+0x1f5/0x3f0 [ 30.872091] do_mmap+0x854/0xf00 [ 30.872540] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.873055] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.873629] ksys_mmap_pgoff+0x3af/0x500 [ 30.874147] do_syscall_64+0x3f/0x90 [ 30.874632] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.875307] RIP: 0033:0x7f0a33a40d82 [ 30.875780] 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 [ 30.877961] RSP: 002b:00007fff7ae349a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.878879] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0a33a40d82 [ 30.879771] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0a32e7a000 [ 30.880625] RBP: 00007f0a32e7a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.881474] R10: 0000000000000812 R11: 0000000000000206 R12: 000056548195df70 [ 30.882318] R13: 00007fff7ae349c0 R14: 00007fff7ae349f0 R15: 00007fff7ae34d50 [ 30.883185] [ 30.883481] [ 30.883696] Allocated by task 213: [ 30.884124] kasan_save_stack+0x22/0x50 [ 30.884637] kasan_set_track+0x25/0x30 [ 30.885131] __kasan_slab_alloc+0x59/0x70 [ 30.885655] kmem_cache_alloc+0x16b/0x370 [ 30.886174] vm_area_dup+0x20/0x160 [ 30.886627] __split_vma+0x170/0x950 [ 30.887089] split_vma+0xc6/0x110 [ 30.887548] mprotect_fixup+0x8d2/0xb30 [ 30.888048] do_mprotect_pkey+0x87e/0xd40 [ 30.888566] __x64_sys_mprotect+0x78/0xc0 [ 30.889090] do_syscall_64+0x3f/0x90 [ 30.889573] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.890219] [ 30.890435] Freed by task 19: [ 30.890820] kasan_save_stack+0x22/0x50 [ 30.891328] kasan_set_track+0x25/0x30 [ 30.891830] kasan_save_free_info+0x2b/0x50 [ 30.892368] __kasan_slab_free+0x10a/0x190 [ 30.892896] kmem_cache_free+0x10d/0x4d0 [ 30.893405] rcu_core+0x8c8/0x2860 [ 30.893853] __do_softirq+0x1b7/0x7d4 [ 30.894332] [ 30.894551] Last potentially related work creation: [ 30.895133] kasan_save_stack+0x22/0x50 [ 30.895666] __kasan_record_aux_stack+0x8e/0xa0 [ 30.896246] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.896944] remove_vma+0x139/0x170 [ 30.897397] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.897954] do_vmi_munmap+0x1f1/0x2b0 [ 30.898447] __vm_munmap+0x138/0x3a0 [ 30.898921] __x64_sys_munmap+0x59/0x80 [ 30.899432] do_syscall_64+0x3f/0x90 [ 30.899908] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.900552] [ 30.900770] The buggy address belongs to the object at ffff8880164682b8 [ 30.900770] which belongs to the cache vm_area_struct of size 168 [ 30.902249] The buggy address is located 88 bytes inside of [ 30.902249] freed 168-byte region [ffff8880164682b8, ffff888016468360) [ 30.903648] [ 30.903863] The buggy address belongs to the physical page: [ 30.904521] page:00000000d65003f2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16468 [ 30.905607] memcg:ffff88800e977201 [ 30.906036] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.906681] page_type: 0xffffffff() [ 30.907129] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.908062] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e977201 [ 30.908966] page dumped because: kasan: bad access detected [ 30.909626] [ 30.909841] Memory state around the buggy address: [ 30.910418] ffff888016468200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.911280] ffff888016468280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.912126] >ffff888016468300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.912974] ^ [ 30.913449] ffff888016468380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.914299] ffff888016468400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.915157] ================================================================== [ 30.916087] Disabling lock debugging due to kernel taint [ 33.254467] BUG: Bad rss-counter state mm:00000000710ce517 type:MM_FILEPAGES val:33 [ 33.255652] BUG: Bad rss-counter state mm:00000000710ce517 type:MM_ANONPAGES val:22 [ 33.638095] BUG: Bad rss-counter state mm:0000000093763471 type:MM_FILEPAGES val:33 [ 33.639065] BUG: Bad rss-counter state mm:0000000093763471 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50058' (ECDSA) to the list of known hosts. 2023/06/20 23:36:04 fuzzer started 2023/06/20 23:36:04 dialing manager at localhost:36067 2023/06/20 23:36:04 checking machine... 2023/06/20 23:36:04 checking revisions... [ 34.383989] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:36:04 testing simple program... [ 34.434175] cgroup: Unknown subsys name 'net' [ 34.471321] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:36:04 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff86138e8c RDX=ffff88806ce09ac0 RSI=1ffff1100d9c135a RDI=1ffff1100d9c135a RBP=ffff88806ce09ad0 RSP=ffff88806ce09a08 R8 =ffffffff86138e90 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffff88806ce09dc8 R15=ffff88806ce09a78 RIP=ffffffff811310a7 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 0000000000000000 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=00007fffb2cd0628 CR3=000000000c44a000 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=2034303a36333a3332203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a36333a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080010001 RBX=000000000000e052 RCX=0000000080010001 RDX=ffff888008d951c0 RSI=ffffffff813c925d RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806cf09e98 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=000000170326512c R12=00000007cd788a00 R13=0000000000000000 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff814c0871 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 =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=00007f1681914e40 CR3=000000000d710000 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=98e25c4ae81e99bd2844752f55273781 XMM02=000000000011d348ec2efd57dc4c00df XMM03=00000000001219a865b8a6950040f5ef XMM04=45aba01a5743ce6000000000000ae988 XMM05=fe93c0838b64530c0000000000132620 XMM06=4fda316b135da52b00000000001316c0 XMM07=e042d86d42eb936e0000000000121c28 XMM08=65b8a6950040f5ef000000000011d3a8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000