syzkaller login: [ 30.670991] BUG: Bad rss-counter state mm:0000000072d8f96b type:MM_FILEPAGES val:33 [ 30.671728] BUG: Bad rss-counter state mm:0000000072d8f96b type:MM_ANONPAGES val:22 [ 30.838100] ================================================================== [ 30.839259] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.840243] Read of size 8 at addr ffff88801a0575c8 by task sshd/220 [ 30.841098] [ 30.841315] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.842172] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.843170] Call Trace: [ 30.843491] [ 30.843776] dump_stack_lvl+0x91/0xf0 [ 30.844263] print_report+0xcc/0x620 [ 30.844748] ? __virt_addr_valid+0x102/0x340 [ 30.845299] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.845915] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.846531] kasan_report+0xbe/0xf0 [ 30.847025] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.847677] vma_interval_tree_remove+0xc75/0xec0 [ 30.848306] vma_prepare+0xc54/0x11a0 [ 30.848812] __split_vma+0x5af/0x950 [ 30.849304] ? __pfx___split_vma+0x10/0x10 [ 30.849856] ? find_held_lock+0x2c/0x110 [ 30.850401] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.851011] ? lock_is_held_type+0x9f/0x120 [ 30.851570] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.852203] ? mtree_range_walk+0x632/0x900 [ 30.852781] ? mas_walk+0x5c7/0x7c0 [ 30.853277] do_vmi_munmap+0x1f1/0x2b0 [ 30.853799] mmap_region+0x1f9/0x2660 [ 30.854298] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.854848] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.855597] ? __pfx_lock_acquire+0x10/0x10 [ 30.856161] ? __pfx_mmap_region+0x10/0x10 [ 30.856711] ? security_mmap_addr+0x7d/0xa0 [ 30.857264] ? get_unmapped_area+0x1f5/0x3f0 [ 30.857831] do_mmap+0x854/0xf00 [ 30.858286] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.858817] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.859409] ksys_mmap_pgoff+0x3af/0x500 [ 30.859937] do_syscall_64+0x3f/0x90 [ 30.860439] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.861115] RIP: 0033:0x7f15742b9d82 [ 30.861590] 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 [ 30.863858] RSP: 002b:00007fffac553978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.864814] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f15742b9d82 [ 30.865705] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f15736f3000 [ 30.866601] RBP: 00007f15736f3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.867497] R10: 0000000000000812 R11: 0000000000000206 R12: 00005599d29ced90 [ 30.868392] R13: 00007fffac553990 R14: 00007fffac5539c0 R15: 00007fffac553d20 [ 30.869299] [ 30.869610] [ 30.869834] Allocated by task 212: [ 30.870284] kasan_save_stack+0x22/0x50 [ 30.870832] kasan_set_track+0x25/0x30 [ 30.871349] __kasan_slab_alloc+0x59/0x70 [ 30.871896] kmem_cache_alloc+0x16b/0x370 [ 30.872430] vm_area_dup+0x20/0x160 [ 30.872899] __split_vma+0x170/0x950 [ 30.873387] split_vma+0xc6/0x110 [ 30.873848] mprotect_fixup+0x8d2/0xb30 [ 30.874363] do_mprotect_pkey+0x87e/0xd40 [ 30.874913] __x64_sys_mprotect+0x78/0xc0 [ 30.875450] do_syscall_64+0x3f/0x90 [ 30.875939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.876608] [ 30.876835] Freed by task 212: [ 30.877246] kasan_save_stack+0x22/0x50 [ 30.877769] kasan_set_track+0x25/0x30 [ 30.878287] kasan_save_free_info+0x2b/0x50 [ 30.878869] __kasan_slab_free+0x10a/0x190 [ 30.879433] kmem_cache_free+0x10d/0x4d0 [ 30.879965] rcu_core+0x8c8/0x2860 [ 30.880429] __do_softirq+0x1b7/0x7d4 [ 30.880929] [ 30.881152] Last potentially related work creation: [ 30.881771] kasan_save_stack+0x22/0x50 [ 30.882294] __kasan_record_aux_stack+0x8e/0xa0 [ 30.882902] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.883578] remove_vma+0x139/0x170 [ 30.884056] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.884639] do_vmi_munmap+0x1f1/0x2b0 [ 30.885146] __vm_munmap+0x138/0x3a0 [ 30.885633] __x64_sys_munmap+0x59/0x80 [ 30.886150] do_syscall_64+0x3f/0x90 [ 30.886646] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.887315] [ 30.887541] Second to last potentially related work creation: [ 30.888261] kasan_save_stack+0x22/0x50 [ 30.888778] __kasan_record_aux_stack+0x8e/0xa0 [ 30.889384] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.890059] remove_vma+0x139/0x170 [ 30.890535] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.891136] do_vmi_munmap+0x1f1/0x2b0 [ 30.891650] mmap_region+0x1f9/0x2660 [ 30.892147] do_mmap+0x854/0xf00 [ 30.892598] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.893112] ksys_mmap_pgoff+0x3af/0x500 [ 30.893636] do_syscall_64+0x3f/0x90 [ 30.894136] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.894814] [ 30.895036] The buggy address belongs to the object at ffff88801a057570 [ 30.895036] which belongs to the cache vm_area_struct of size 168 [ 30.896573] The buggy address is located 88 bytes inside of [ 30.896573] freed 168-byte region [ffff88801a057570, ffff88801a057618) [ 30.898055] [ 30.898276] The buggy address belongs to the physical page: [ 30.898967] page:00000000eb4293e2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a057 [ 30.900117] memcg:ffff888019db1b01 [ 30.900562] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.901301] page_type: 0xffffffff() [ 30.901771] raw: 0100000000000200 ffff88800879fc80 ffffea000067ae00 0000000000000007 [ 30.902767] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019db1b01 [ 30.903722] page dumped because: kasan: bad access detected [ 30.904421] [ 30.904646] Memory state around the buggy address: [ 30.905255] ffff88801a057480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.906155] ffff88801a057500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.907062] >ffff88801a057580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.907950] ^ [ 30.908654] ffff88801a057600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.909546] ffff88801a057680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.910450] ================================================================== [ 30.911454] Disabling lock debugging due to kernel taint [ 32.875854] BUG: Bad rss-counter state mm:00000000a641a4c4 type:MM_FILEPAGES val:33 [ 32.876895] BUG: Bad rss-counter state mm:00000000a641a4c4 type:MM_ANONPAGES val:22 [ 33.323634] BUG: Bad rss-counter state mm:00000000b1a78db2 type:MM_FILEPAGES val:33 [ 33.324770] BUG: Bad rss-counter state mm:00000000b1a78db2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55923' (ECDSA) to the list of known hosts. 2023/06/20 00:54:56 fuzzer started 2023/06/20 00:54:56 dialing manager at localhost:44161 2023/06/20 00:54:56 checking machine... 2023/06/20 00:54:56 checking revisions... [ 34.019329] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:54:57 testing simple program... [ 34.057982] cgroup: Unknown subsys name 'net' [ 34.120272] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:54:56 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f0467d3a0a0 CR3=000000000fa26000 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=2036353a34353a3030203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a34353a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888019edf7d0 RCX=0000000000000001 RDX=1ffff110033dbefa RSI=ffffffff83874fbc RDI=ffff888019edf7dc RBP=0000000000000006 RSP=ffff888019edf6e8 R8 =0000000000000001 R9 =ffff888019edf748 R10=0000000000038001 R11=000000000008b5c6 R12=ffff888019edf7d0 R13=0000000000000000 R14=ffff88800fee8000 R15=0000000000082cc0 RIP=ffffffff813ad4cf 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 00007fca87c27900 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=00007ffd05e95000 CR3=000000000965c000 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