syzkaller login: [ 35.166093] BUG: Bad rss-counter state mm:00000000c682f90f type:MM_FILEPAGES val:33 [ 35.167250] BUG: Bad rss-counter state mm:00000000c682f90f type:MM_ANONPAGES val:22 [ 35.340306] ================================================================== [ 35.341519] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.343002] Read of size 8 at addr ffff888019279ed8 by task sshd/218 [ 35.343856] [ 35.344098] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.345081] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.346201] Call Trace: [ 35.346581] [ 35.346896] dump_stack_lvl+0x91/0xf0 [ 35.347447] print_report+0xcc/0x620 [ 35.347986] ? __virt_addr_valid+0x102/0x340 [ 35.348602] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.349296] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.349987] kasan_report+0xbe/0xf0 [ 35.350578] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.351279] vma_interval_tree_remove+0xc75/0xec0 [ 35.351970] vma_prepare+0xc54/0x11a0 [ 35.352522] __split_vma+0x5af/0x950 [ 35.353061] ? __pfx___split_vma+0x10/0x10 [ 35.353671] ? find_held_lock+0x2c/0x110 [ 35.354306] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.354987] ? lock_is_held_type+0x9f/0x120 [ 35.355611] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.356317] ? mtree_range_walk+0x632/0x900 [ 35.356956] ? mas_walk+0x5c7/0x7c0 [ 35.357496] do_vmi_munmap+0x1f1/0x2b0 [ 35.358104] mmap_region+0x1f9/0x2660 [ 35.358690] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.359278] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.360097] ? __pfx_lock_acquire+0x10/0x10 [ 35.360704] ? __pfx_mmap_region+0x10/0x10 [ 35.361317] ? security_mmap_addr+0x7d/0xa0 [ 35.361921] ? get_unmapped_area+0x1f5/0x3f0 [ 35.362606] do_mmap+0x854/0xf00 [ 35.363112] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.363672] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.364309] ksys_mmap_pgoff+0x3af/0x500 [ 35.364881] do_syscall_64+0x3f/0x90 [ 35.365429] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.366200] RIP: 0033:0x7f1a7812bd82 [ 35.366736] 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 [ 35.369158] RSP: 002b:00007ffde717e7d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.370231] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1a7812bd82 [ 35.371194] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1a77565000 [ 35.372143] RBP: 00007f1a77565000 R08: 0000000000000009 R09: 0000000000001000 [ 35.373111] R10: 0000000000000812 R11: 0000000000000206 R12: 00005622b5d0df70 [ 35.374117] R13: 00007ffde717e7f0 R14: 00007ffde717e820 R15: 00007ffde717eb80 [ 35.375103] [ 35.375434] [ 35.375677] Allocated by task 211: [ 35.376162] kasan_save_stack+0x22/0x50 [ 35.376736] kasan_set_track+0x25/0x30 [ 35.377305] __kasan_slab_alloc+0x59/0x70 [ 35.377891] kmem_cache_alloc+0x16b/0x370 [ 35.378522] vm_area_dup+0x20/0x160 [ 35.379035] __split_vma+0x170/0x950 [ 35.379558] split_vma+0xc6/0x110 [ 35.380055] mprotect_fixup+0x8d2/0xb30 [ 35.380626] do_mprotect_pkey+0x87e/0xd40 [ 35.381214] __x64_sys_mprotect+0x78/0xc0 [ 35.381804] do_syscall_64+0x3f/0x90 [ 35.382398] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.383123] [ 35.383363] Freed by task 211: [ 35.383799] kasan_save_stack+0x22/0x50 [ 35.384429] kasan_set_track+0x25/0x30 [ 35.384983] kasan_save_free_info+0x2b/0x50 [ 35.385585] __kasan_slab_free+0x10a/0x190 [ 35.386225] kmem_cache_free+0x10d/0x4d0 [ 35.386820] rcu_core+0x8c8/0x2860 [ 35.387322] __do_softirq+0x1b7/0x7d4 [ 35.387856] [ 35.388100] Last potentially related work creation: [ 35.388756] kasan_save_stack+0x22/0x50 [ 35.389318] __kasan_record_aux_stack+0x8e/0xa0 [ 35.389970] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.390747] remove_vma+0x139/0x170 [ 35.391253] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.391874] do_vmi_munmap+0x1f1/0x2b0 [ 35.392411] __vm_munmap+0x138/0x3a0 [ 35.392931] __x64_sys_munmap+0x59/0x80 [ 35.393481] do_syscall_64+0x3f/0x90 [ 35.394032] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.394802] [ 35.395043] The buggy address belongs to the object at ffff888019279e80 [ 35.395043] which belongs to the cache vm_area_struct of size 168 [ 35.396679] The buggy address is located 88 bytes inside of [ 35.396679] freed 168-byte region [ffff888019279e80, ffff888019279f28) [ 35.398277] [ 35.398536] The buggy address belongs to the physical page: [ 35.399276] page:00000000b1ddd18e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19279 [ 35.400493] memcg:ffff8880163dd701 [ 35.400970] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.401698] page_type: 0xffffffff() [ 35.402241] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.403281] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880163dd701 [ 35.404293] page dumped because: kasan: bad access detected [ 35.405038] [ 35.405273] Memory state around the buggy address: [ 35.405912] ffff888019279d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.406900] ffff888019279e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 35.407860] >ffff888019279e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.408809] ^ [ 35.409615] ffff888019279f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 35.410616] ffff888019279f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.411552] ================================================================== [ 35.412622] Disabling lock debugging due to kernel taint [ 37.327625] BUG: Bad rss-counter state mm:000000002cb16219 type:MM_FILEPAGES val:33 [ 37.329051] BUG: Bad rss-counter state mm:000000002cb16219 type:MM_ANONPAGES val:22 [ 37.784609] BUG: Bad rss-counter state mm:000000002949426d type:MM_FILEPAGES val:33 [ 37.785623] BUG: Bad rss-counter state mm:000000002949426d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38751' (ECDSA) to the list of known hosts. 2023/06/20 02:34:49 fuzzer started 2023/06/20 02:34:50 dialing manager at localhost:44161 2023/06/20 02:34:50 checking machine... 2023/06/20 02:34:50 checking revisions... [ 38.511789] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:34:50 testing simple program... [ 38.573558] cgroup: Unknown subsys name 'net' [ 38.613326] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:34:49 Registers: info registers vcpu 0 RAX=ffffffff83639820 RBX=ffffffff85fa367c RCX=ffffffff83639ac9 RDX=0000000000000000 RSI=ffffffff863b17c8 RDI=ffffffff85fa367c RBP=ffffffff85fa3680 RSP=ffff88801036f1d0 R8 =ffffffff863b17c8 R9 =ffff88801036f2c8 R10=0000000000038001 R11=000000000008a8aa R12=ffffffff85fa367c R13=ffffffff85fa367c R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fca7 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 00007f3a9478f900 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=00007f3a93cb0028 CR3=000000000c800000 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=6a80bd0bce3484ca00000000000ae988 XMM05=c2eebbc6b95dc3a10000000000135d98 XMM06=bdf2e299e47b49d50000000000134ac8 XMM07=fb795ef6d65770560000000000125300 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000014ab3 RBX=0000000000000001 RCX=ffffffff81496309 RDX=0000000000014abd RSI=0000000000004963 RDI=000000000003e019 RBP=ffff88801ca374f0 RSP=ffff88801ca37428 R8 =ffffffff860ee3fe R9 =ffff88801ca374d8 R10=0000000000038001 R11=0000000000014ab3 R12=ffff88801ca374f8 R13=ffff88801ca374e0 R14=ffff88801ca374d9 R15=ffff88801ca37498 RIP=ffffffff81130843 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 00007fe8f99c2900 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=00007fffb754e000 CR3=000000000e208000 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