syzkaller login: [ 55.667910] BUG: Bad rss-counter state mm:00000000762667ce type:MM_FILEPAGES val:33 [ 55.668976] BUG: Bad rss-counter state mm:00000000762667ce type:MM_ANONPAGES val:22 [ 55.836024] ================================================================== [ 55.836933] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 55.837965] Read of size 8 at addr ffff88800e04fc20 by task sshd/219 [ 55.838744] [ 55.838969] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 55.839842] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 55.840840] Call Trace: [ 55.841173] [ 55.841462] dump_stack_lvl+0x91/0xf0 [ 55.841960] print_report+0xcc/0x620 [ 55.842459] ? __virt_addr_valid+0x102/0x340 [ 55.843014] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.843627] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.844246] kasan_report+0xbe/0xf0 [ 55.844718] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.845369] vma_interval_tree_remove+0xc75/0xec0 [ 55.845980] vma_prepare+0xc54/0x11a0 [ 55.846462] __split_vma+0x5af/0x950 [ 55.846939] ? __pfx___split_vma+0x10/0x10 [ 55.847469] ? find_held_lock+0x2c/0x110 [ 55.847989] do_vmi_align_munmap+0x2ba/0x11f0 [ 55.848555] ? lock_is_held_type+0x9f/0x120 [ 55.849100] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 55.849705] ? mtree_range_walk+0x632/0x900 [ 55.850258] ? mas_walk+0x5c7/0x7c0 [ 55.850739] do_vmi_munmap+0x1f1/0x2b0 [ 55.851239] mmap_region+0x1f9/0x2660 [ 55.851718] ? vm_mmap_pgoff+0x15c/0x3a0 [ 55.852228] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 55.852954] ? __pfx_lock_acquire+0x10/0x10 [ 55.853485] ? __pfx_mmap_region+0x10/0x10 [ 55.854010] ? security_mmap_addr+0x7d/0xa0 [ 55.854545] ? get_unmapped_area+0x1f5/0x3f0 [ 55.855095] do_mmap+0x854/0xf00 [ 55.855533] vm_mmap_pgoff+0x1a6/0x3a0 [ 55.856042] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 55.856599] ksys_mmap_pgoff+0x3af/0x500 [ 55.857123] do_syscall_64+0x3f/0x90 [ 55.857606] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.858251] RIP: 0033:0x7f3be6488d82 [ 55.858705] 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 [ 55.860834] RSP: 002b:00007ffda6fedaa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 55.861737] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3be6488d82 [ 55.862590] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3be58c2000 [ 55.863438] RBP: 00007f3be58c2000 R08: 0000000000000009 R09: 0000000000001000 [ 55.864288] R10: 0000000000000812 R11: 0000000000000206 R12: 000056495987cec0 [ 55.865142] R13: 00007ffda6fedac0 R14: 00007ffda6fedaf0 R15: 00007ffda6fede50 [ 55.865995] [ 55.866285] [ 55.866500] Allocated by task 212: [ 55.866931] kasan_save_stack+0x22/0x50 [ 55.867445] kasan_set_track+0x25/0x30 [ 55.867945] __kasan_slab_alloc+0x59/0x70 [ 55.868471] kmem_cache_alloc+0x16b/0x370 [ 55.868997] vm_area_dup+0x20/0x160 [ 55.869450] __split_vma+0x170/0x950 [ 55.869919] split_vma+0xc6/0x110 [ 55.870369] mprotect_fixup+0x8d2/0xb30 [ 55.870872] do_mprotect_pkey+0x87e/0xd40 [ 55.871390] __x64_sys_mprotect+0x78/0xc0 [ 55.871914] do_syscall_64+0x3f/0x90 [ 55.872385] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.873032] [ 55.873245] Freed by task 212: [ 55.873640] kasan_save_stack+0x22/0x50 [ 55.874143] kasan_set_track+0x25/0x30 [ 55.874632] kasan_save_free_info+0x2b/0x50 [ 55.875163] __kasan_slab_free+0x10a/0x190 [ 55.875697] kmem_cache_free+0x10d/0x4d0 [ 55.876204] rcu_core+0x8c8/0x2860 [ 55.876652] __do_softirq+0x1b7/0x7d4 [ 55.877140] [ 55.877360] Last potentially related work creation: [ 55.877952] kasan_save_stack+0x22/0x50 [ 55.878460] __kasan_record_aux_stack+0x8e/0xa0 [ 55.879040] __call_rcu_common.constprop.0+0x6a/0xb90 [ 55.879677] remove_vma+0x139/0x170 [ 55.880134] do_vmi_align_munmap+0xd4a/0x11f0 [ 55.880702] do_vmi_munmap+0x1f1/0x2b0 [ 55.881198] __vm_munmap+0x138/0x3a0 [ 55.881660] __x64_sys_munmap+0x59/0x80 [ 55.882161] do_syscall_64+0x3f/0x90 [ 55.882637] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.883275] [ 55.883494] Second to last potentially related work creation: [ 55.884169] kasan_save_stack+0x22/0x50 [ 55.884676] __kasan_record_aux_stack+0x8e/0xa0 [ 55.885263] __call_rcu_common.constprop.0+0x6a/0xb90 [ 55.885900] remove_vma+0x139/0x170 [ 55.886356] do_vmi_align_munmap+0xd4a/0x11f0 [ 55.886928] do_vmi_munmap+0x1f1/0x2b0 [ 55.887418] mmap_region+0x1f9/0x2660 [ 55.887893] do_mmap+0x854/0xf00 [ 55.888325] vm_mmap_pgoff+0x1a6/0x3a0 [ 55.888812] ksys_mmap_pgoff+0x3af/0x500 [ 55.889326] do_syscall_64+0x3f/0x90 [ 55.889798] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.890443] [ 55.890655] The buggy address belongs to the object at ffff88800e04fbc8 [ 55.890655] which belongs to the cache vm_area_struct of size 168 [ 55.892136] The buggy address is located 88 bytes inside of [ 55.892136] freed 168-byte region [ffff88800e04fbc8, ffff88800e04fc70) [ 55.893569] [ 55.893785] The buggy address belongs to the physical page: [ 55.894446] page:000000008547a4f6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe04f [ 55.895540] memcg:ffff88800dbbdd01 [ 55.895973] flags: 0x100000000000200(slab|node=0|zone=1) [ 55.896625] page_type: 0xffffffff() [ 55.897093] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 55.898016] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbbdd01 [ 55.898919] page dumped because: kasan: bad access detected [ 55.899588] [ 55.899804] Memory state around the buggy address: [ 55.900390] ffff88800e04fb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 55.901251] ffff88800e04fb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 55.902106] >ffff88800e04fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 55.902966] ^ [ 55.903489] ffff88800e04fc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 55.904359] ffff88800e04fd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 55.905226] ================================================================== [ 55.906287] Disabling lock debugging due to kernel taint [ 57.727662] BUG: Bad rss-counter state mm:0000000079b31cdd type:MM_FILEPAGES val:33 [ 57.728282] BUG: Bad rss-counter state mm:0000000079b31cdd type:MM_ANONPAGES val:22 [ 58.245077] BUG: Bad rss-counter state mm:00000000422696ed type:MM_FILEPAGES val:33 [ 58.246514] BUG: Bad rss-counter state mm:00000000422696ed type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25656' (ECDSA) to the list of known hosts. 2023/06/19 22:06:06 fuzzer started 2023/06/19 22:06:07 dialing manager at localhost:44161 2023/06/19 22:06:07 checking machine... 2023/06/19 22:06:07 checking revisions... [ 59.039622] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:06:07 testing simple program... [ 59.079774] cgroup: Unknown subsys name 'net' [ 59.138464] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:05:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff88801417d1c0 RSI=ffffffff81935c39 RDI=ffff888009a11a20 RBP=ffff888009a119f8 RSP=ffff8880143ef7f8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=1ffff1100287df0b R13=ffff88801426e000 R14=0000000000000001 R15=ffff888008ec0f20 RIP=ffffffff814c081b 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 00007f7780125900 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=00007f777f5a9980 CR3=000000000c614000 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=c9d03b2ce90d0d1300000000000ae988 XMM05=40127a759e77479d0000000000136148 XMM06=49ff183be82f97c50000000000134b78 XMM07=fb795ef6d65770560000000000124028 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000010 RCX=0000000000000000 RDX=ffff888015bed1c0 RSI=ffffffff8449effb RDI=0000000000000000 RBP=ffff888019f28408 RSP=ffff888019f37ce0 R8 =0000000000000000 R9 =0000000000000002 R10=000000000000000e R11=0000000000000000 R12=0000000000000002 R13=000000000000000e R14=00007f5d1d9e4044 R15=00007f5d1d9e2fff RIP=ffffffff814c081b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5d1ce90900 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=00007f5d1d9e4044 CR3=000000000e38e000 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=00000000000000000000000000000000 XMM02=37a2d28c38c5478dede8e345956d57f3 XMM03=30c53c8597b1030c0b2da1c0d61a230d XMM04=d79959d230bf6352f85d42de762d2471 XMM05=00000000000000000000000000000000 XMM06=30993c8530b1030c0b2d42c0761a230d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000