syzkaller login: [ 31.346884] BUG: Bad rss-counter state mm:0000000090b52eb2 type:MM_FILEPAGES val:33 [ 31.348103] BUG: Bad rss-counter state mm:0000000090b52eb2 type:MM_ANONPAGES val:22 [ 31.387422] ================================================================== [ 31.388168] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.388889] Read of size 8 at addr ffff888016dd0058 by task sshd/219 [ 31.389451] [ 31.389597] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.390132] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.390743] Call Trace: [ 31.390954] [ 31.391174] dump_stack_lvl+0x91/0xf0 [ 31.391447] print_report+0xcc/0x620 [ 31.391714] ? __virt_addr_valid+0x102/0x340 [ 31.392151] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.392509] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.392873] kasan_report+0xbe/0xf0 [ 31.393211] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.393584] vma_interval_tree_remove+0xc75/0xec0 [ 31.393987] vma_prepare+0xc54/0x11a0 [ 31.394273] __split_vma+0x5af/0x950 [ 31.394591] ? __pfx___split_vma+0x10/0x10 [ 31.394915] ? find_held_lock+0x2c/0x110 [ 31.395289] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.395626] ? lock_is_held_type+0x9f/0x120 [ 31.396025] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.396365] ? mtree_range_walk+0x632/0x900 [ 31.396810] ? mas_walk+0x5c7/0x7c0 [ 31.397072] do_vmi_munmap+0x1f1/0x2b0 [ 31.397399] mmap_region+0x1f9/0x2660 [ 31.397696] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.397998] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.398464] ? __pfx_lock_acquire+0x10/0x10 [ 31.398807] ? __pfx_mmap_region+0x10/0x10 [ 31.399115] ? security_mmap_addr+0x7d/0xa0 [ 31.399408] ? get_unmapped_area+0x1f5/0x3f0 [ 31.399711] do_mmap+0x854/0xf00 [ 31.399971] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.400339] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.400696] ksys_mmap_pgoff+0x3af/0x500 [ 31.400976] do_syscall_64+0x3f/0x90 [ 31.401238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.401602] RIP: 0033:0x7f866378ed82 [ 31.401854] 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 [ 31.403207] RSP: 002b:00007ffd48015688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.403712] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f866378ed82 [ 31.404325] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8662bc8000 [ 31.404937] RBP: 00007f8662bc8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.405464] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559cf60ceec0 [ 31.405936] R13: 00007ffd480156a0 R14: 00007ffd480156d0 R15: 00007ffd48015a30 [ 31.406525] [ 31.406688] [ 31.406805] Allocated by task 212: [ 31.407050] kasan_save_stack+0x22/0x50 [ 31.407408] kasan_set_track+0x25/0x30 [ 31.407726] __kasan_slab_alloc+0x59/0x70 [ 31.408056] kmem_cache_alloc+0x16b/0x370 [ 31.408420] vm_area_dup+0x20/0x160 [ 31.408777] __split_vma+0x170/0x950 [ 31.409134] split_vma+0xc6/0x110 [ 31.409375] mprotect_fixup+0x8d2/0xb30 [ 31.409655] do_mprotect_pkey+0x87e/0xd40 [ 31.409943] __x64_sys_mprotect+0x78/0xc0 [ 31.410235] do_syscall_64+0x3f/0x90 [ 31.410498] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.410857] [ 31.410977] Freed by task 212: [ 31.411192] kasan_save_stack+0x22/0x50 [ 31.411472] kasan_set_track+0x25/0x30 [ 31.411743] kasan_save_free_info+0x2b/0x50 [ 31.412039] __kasan_slab_free+0x10a/0x190 [ 31.412341] kmem_cache_free+0x10d/0x4d0 [ 31.412638] rcu_core+0x8c8/0x2860 [ 31.412888] __do_softirq+0x1b7/0x7d4 [ 31.413151] [ 31.413269] Last potentially related work creation: [ 31.413596] kasan_save_stack+0x22/0x50 [ 31.413871] __kasan_record_aux_stack+0x8e/0xa0 [ 31.414192] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.414542] remove_vma+0x139/0x170 [ 31.414786] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.415094] do_vmi_munmap+0x1f1/0x2b0 [ 31.415366] __vm_munmap+0x138/0x3a0 [ 31.415627] __x64_sys_munmap+0x59/0x80 [ 31.415896] do_syscall_64+0x3f/0x90 [ 31.416159] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.416519] [ 31.416640] The buggy address belongs to the object at ffff888016dd0000 [ 31.416640] which belongs to the cache vm_area_struct of size 168 [ 31.417446] The buggy address is located 88 bytes inside of [ 31.417446] freed 168-byte region [ffff888016dd0000, ffff888016dd00a8) [ 31.418232] [ 31.418352] The buggy address belongs to the physical page: [ 31.418715] page:00000000f475a127 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16dd0 [ 31.419313] memcg:ffff88800b972b01 [ 31.419549] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.419911] page_type: 0xffffffff() [ 31.420153] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.420655] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b972b01 [ 31.421157] page dumped because: kasan: bad access detected [ 31.421522] [ 31.421641] Memory state around the buggy address: [ 31.421966] ffff888016dcff00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.422448] ffff888016dcff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.422918] >ffff888016dd0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.423398] ^ [ 31.423815] ffff888016dd0080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.424311] ffff888016dd0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.424785] ================================================================== [ 31.425348] Disabling lock debugging due to kernel taint [ 33.632797] BUG: Bad rss-counter state mm:0000000053ba416c type:MM_FILEPAGES val:33 [ 33.634295] BUG: Bad rss-counter state mm:0000000053ba416c type:MM_ANONPAGES val:22 [ 34.179405] BUG: Bad rss-counter state mm:00000000c3ff68fb type:MM_FILEPAGES val:33 [ 34.180639] BUG: Bad rss-counter state mm:00000000c3ff68fb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35121' (ECDSA) to the list of known hosts. 2023/06/21 00:34:47 fuzzer started 2023/06/21 00:34:47 dialing manager at localhost:36067 2023/06/21 00:34:47 checking machine... 2023/06/21 00:34:47 checking revisions... [ 34.774737] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:34:47 testing simple program... [ 34.811227] cgroup: Unknown subsys name 'net' [ 34.848825] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:34:47 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=1ffff11001ac4fac RCX=0000000080000001 RDX=ffff88801593d1c0 RSI=ffffffff81718825 RDI=0000000000000006 RBP=800000001d596065 RSP=ffff88800d627d38 R8 =0000000000000006 R9 =800000001d596065 R10=800000001d596065 R11=0000000000000000 R12=ffff8880168f45c8 R13=800000001d596065 R14=00000000168f4007 R15=000000001a108067 RIP=ffffffff814c0871 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 00007f4020f46900 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=00007f40216b930c CR3=000000000cbc8000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888008e07db0 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806cf0a001 RSI=ffff88806cf09ff8 RDI=ffff88806cf09ff8 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a00 R8 =ffffffff864b2f42 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000b5305 R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff88806cf09ff8 R15=ffff88806cf09a78 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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=00007ff0854136f0 CR3=000000000f3fc000 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=2036343a34333a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a34333a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000