syzkaller login: [ 56.732992] BUG: Bad rss-counter state mm:00000000b70e8011 type:MM_FILEPAGES val:33 [ 56.733695] BUG: Bad rss-counter state mm:00000000b70e8011 type:MM_ANONPAGES val:22 [ 56.893194] ================================================================== [ 56.894129] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 56.895077] Read of size 8 at addr ffff88800cb005c8 by task sshd/219 [ 56.895865] [ 56.896084] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 56.897143] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 56.898136] Call Trace: [ 56.898458] [ 56.898751] dump_stack_lvl+0x91/0xf0 [ 56.899272] print_report+0xcc/0x620 [ 56.899768] ? __virt_addr_valid+0x102/0x340 [ 56.900346] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.901003] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.901624] kasan_report+0xbe/0xf0 [ 56.902121] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.902740] vma_interval_tree_remove+0xc75/0xec0 [ 56.903343] vma_prepare+0xc54/0x11a0 [ 56.903823] __split_vma+0x5af/0x950 [ 56.904298] ? __pfx___split_vma+0x10/0x10 [ 56.904830] ? find_held_lock+0x2c/0x110 [ 56.905373] do_vmi_align_munmap+0x2ba/0x11f0 [ 56.905947] ? lock_is_held_type+0x9f/0x120 [ 56.906487] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 56.907093] ? mtree_range_walk+0x632/0x900 [ 56.907635] ? mas_walk+0x5c7/0x7c0 [ 56.908102] do_vmi_munmap+0x1f1/0x2b0 [ 56.908590] mmap_region+0x1f9/0x2660 [ 56.909078] ? vm_mmap_pgoff+0x15c/0x3a0 [ 56.909587] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 56.910305] ? __pfx_lock_acquire+0x10/0x10 [ 56.910833] ? __pfx_mmap_region+0x10/0x10 [ 56.911357] ? security_mmap_addr+0x7d/0xa0 [ 56.911883] ? get_unmapped_area+0x1f5/0x3f0 [ 56.912428] do_mmap+0x854/0xf00 [ 56.912863] vm_mmap_pgoff+0x1a6/0x3a0 [ 56.913373] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 56.913926] ksys_mmap_pgoff+0x3af/0x500 [ 56.914427] do_syscall_64+0x3f/0x90 [ 56.914900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.915535] RIP: 0033:0x7f649f76ad82 [ 56.915991] 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 [ 56.918111] RSP: 002b:00007ffccb46c148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 56.919016] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f649f76ad82 [ 56.919870] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f649eba4000 [ 56.920725] RBP: 00007f649eba4000 R08: 0000000000000009 R09: 0000000000001000 [ 56.921584] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d18d88eec0 [ 56.922438] R13: 00007ffccb46c160 R14: 00007ffccb46c190 R15: 00007ffccb46c4f0 [ 56.923297] [ 56.923591] [ 56.923805] Allocated by task 212: [ 56.924234] kasan_save_stack+0x22/0x50 [ 56.924739] kasan_set_track+0x25/0x30 [ 56.925253] __kasan_slab_alloc+0x59/0x70 [ 56.925777] kmem_cache_alloc+0x16b/0x370 [ 56.926291] vm_area_dup+0x20/0x160 [ 56.926749] __split_vma+0x170/0x950 [ 56.927219] split_vma+0xc6/0x110 [ 56.927661] mprotect_fixup+0x8d2/0xb30 [ 56.928171] do_mprotect_pkey+0x87e/0xd40 [ 56.928691] __x64_sys_mprotect+0x78/0xc0 [ 56.929214] do_syscall_64+0x3f/0x90 [ 56.929685] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.930320] [ 56.930532] Freed by task 202: [ 56.930922] kasan_save_stack+0x22/0x50 [ 56.931424] kasan_set_track+0x25/0x30 [ 56.931911] kasan_save_free_info+0x2b/0x50 [ 56.932440] __kasan_slab_free+0x10a/0x190 [ 56.932980] kmem_cache_free+0x10d/0x4d0 [ 56.933496] rcu_core+0x8c8/0x2860 [ 56.933933] __do_softirq+0x1b7/0x7d4 [ 56.934402] [ 56.934615] Last potentially related work creation: [ 56.935194] kasan_save_stack+0x22/0x50 [ 56.935694] __kasan_record_aux_stack+0x8e/0xa0 [ 56.936270] __call_rcu_common.constprop.0+0x6a/0xb90 [ 56.936915] remove_vma+0x139/0x170 [ 56.937378] do_vmi_align_munmap+0xd4a/0x11f0 [ 56.937933] do_vmi_munmap+0x1f1/0x2b0 [ 56.938417] __vm_munmap+0x138/0x3a0 [ 56.938880] __x64_sys_munmap+0x59/0x80 [ 56.939376] do_syscall_64+0x3f/0x90 [ 56.939849] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.940486] [ 56.940697] Second to last potentially related work creation: [ 56.941389] kasan_save_stack+0x22/0x50 [ 56.941888] __kasan_record_aux_stack+0x8e/0xa0 [ 56.942454] __call_rcu_common.constprop.0+0x6a/0xb90 [ 56.943086] remove_vma+0x139/0x170 [ 56.943531] do_vmi_align_munmap+0xd4a/0x11f0 [ 56.944096] do_vmi_munmap+0x1f1/0x2b0 [ 56.944582] mmap_region+0x1f9/0x2660 [ 56.945069] do_mmap+0x854/0xf00 [ 56.945501] vm_mmap_pgoff+0x1a6/0x3a0 [ 56.945993] ksys_mmap_pgoff+0x3af/0x500 [ 56.946489] do_syscall_64+0x3f/0x90 [ 56.946955] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.947601] [ 56.947813] The buggy address belongs to the object at ffff88800cb00570 [ 56.947813] which belongs to the cache vm_area_struct of size 168 [ 56.949286] The buggy address is located 88 bytes inside of [ 56.949286] freed 168-byte region [ffff88800cb00570, ffff88800cb00618) [ 56.950682] [ 56.950896] The buggy address belongs to the physical page: [ 56.951542] page:00000000e8b6b716 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb00 [ 56.952610] memcg:ffff88800f553b01 [ 56.953039] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 56.953731] page_type: 0xffffffff() [ 56.954194] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 56.955132] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f553b01 [ 56.956057] page dumped because: kasan: bad access detected [ 56.956737] [ 56.956973] Memory state around the buggy address: [ 56.957577] ffff88800cb00480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 56.958464] ffff88800cb00500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 56.959344] >ffff88800cb00580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 56.960203] ^ [ 56.960884] ffff88800cb00600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 56.961773] ffff88800cb00680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 56.962630] ================================================================== [ 56.963952] Disabling lock debugging due to kernel taint [ 58.859324] BUG: Bad rss-counter state mm:00000000aa74acce type:MM_FILEPAGES val:33 [ 58.860279] BUG: Bad rss-counter state mm:00000000aa74acce type:MM_ANONPAGES val:22 [ 59.363939] BUG: Bad rss-counter state mm:000000006e0f5bdb type:MM_FILEPAGES val:33 [ 59.365124] BUG: Bad rss-counter state mm:000000006e0f5bdb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22581' (ECDSA) to the list of known hosts. 2023/06/19 19:10:43 fuzzer started 2023/06/19 19:10:44 dialing manager at localhost:44161 2023/06/19 19:10:44 checking machine... 2023/06/19 19:10:44 checking revisions... [ 60.096295] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:10:44 testing simple program... [ 60.145814] cgroup: Unknown subsys name 'net' [ 60.184884] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:10:25 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff110028c6e64 RSI=ffff888014637760 RDI=ffff888014637328 RBP=0000000000000000 RSP=ffff888014637268 R8 =0000000000000001 R9 =ffff888014637318 R10=0000000000038001 R11=0000000000020c50 R12=ffff888014637338 R13=ffff888014637320 R14=ffff888014637760 R15=ffff8880146372d8 RIP=ffffffff81131c60 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 00007f3b432a1900 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=00007f3b43858618 CR3=0000000016af2000 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=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f4d4ee4d800 CR3=0000000013a82000 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=a8a696f86089ecb94d413714c3483e45 XMM02=000000000011d470eff9b2d0a8fce9cb XMM03=000000000011d5402c67c8bc2e329bc3 XMM04=f802715435e6829300000000000ae988 XMM05=dfcdbad4f1609c370000000000134f38 XMM06=806171799158d9670000000000134dc0 XMM07=e042d86d42eb936e0000000000124528 XMM08=e0722bda8b42977c000000000011d540 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000