syzkaller login: [ 38.702481] BUG: Bad rss-counter state mm:00000000a6c1a414 type:MM_FILEPAGES val:33 [ 38.703595] BUG: Bad rss-counter state mm:00000000a6c1a414 type:MM_ANONPAGES val:22 [ 38.868166] ================================================================== [ 38.869233] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.870342] Read of size 8 at addr ffff888015c583f8 by task sshd/219 [ 38.871298] [ 38.871527] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.872430] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.873473] Call Trace: [ 38.873806] [ 38.874103] dump_stack_lvl+0x91/0xf0 [ 38.874640] print_report+0xcc/0x620 [ 38.875158] ? __virt_addr_valid+0x102/0x340 [ 38.875741] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.876392] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.877049] kasan_report+0xbe/0xf0 [ 38.877562] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.878219] vma_interval_tree_remove+0xc75/0xec0 [ 38.878861] vma_prepare+0xc54/0x11a0 [ 38.879365] __split_vma+0x5af/0x950 [ 38.879869] ? __pfx___split_vma+0x10/0x10 [ 38.880433] ? find_held_lock+0x2c/0x110 [ 38.880982] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.881590] ? lock_is_held_type+0x9f/0x120 [ 38.882168] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.882827] ? mtree_range_walk+0x632/0x900 [ 38.883406] ? mas_walk+0x5c7/0x7c0 [ 38.883906] do_vmi_munmap+0x1f1/0x2b0 [ 38.884429] mmap_region+0x1f9/0x2660 [ 38.884942] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.885486] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.886234] ? __pfx_lock_acquire+0x10/0x10 [ 38.886811] ? __pfx_mmap_region+0x10/0x10 [ 38.887378] ? security_mmap_addr+0x7d/0xa0 [ 38.887937] ? get_unmapped_area+0x1f5/0x3f0 [ 38.888525] do_mmap+0x854/0xf00 [ 38.888993] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.889519] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.890112] ksys_mmap_pgoff+0x3af/0x500 [ 38.890660] do_syscall_64+0x3f/0x90 [ 38.891171] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.891852] RIP: 0033:0x7f2a522a9d82 [ 38.892345] 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 [ 38.894602] RSP: 002b:00007ffdb80c1138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.895561] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2a522a9d82 [ 38.896463] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2a516e3000 [ 38.897359] RBP: 00007f2a516e3000 R08: 0000000000000009 R09: 0000000000001000 [ 38.898262] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555a6c4afec0 [ 38.899158] R13: 00007ffdb80c1150 R14: 00007ffdb80c1180 R15: 00007ffdb80c14e0 [ 38.900097] [ 38.900410] [ 38.900636] Allocated by task 212: [ 38.901087] kasan_save_stack+0x22/0x50 [ 38.901624] kasan_set_track+0x25/0x30 [ 38.902152] __kasan_slab_alloc+0x59/0x70 [ 38.902722] kmem_cache_alloc+0x16b/0x370 [ 38.903271] vm_area_dup+0x20/0x160 [ 38.903752] __split_vma+0x170/0x950 [ 38.904240] split_vma+0xc6/0x110 [ 38.904713] mprotect_fixup+0x8d2/0xb30 [ 38.905248] do_mprotect_pkey+0x87e/0xd40 [ 38.905800] __x64_sys_mprotect+0x78/0xc0 [ 38.906355] do_syscall_64+0x3f/0x90 [ 38.906873] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.907559] [ 38.907788] Freed by task 212: [ 38.908202] kasan_save_stack+0x22/0x50 [ 38.908737] kasan_set_track+0x25/0x30 [ 38.909267] kasan_save_free_info+0x2b/0x50 [ 38.909838] __kasan_slab_free+0x10a/0x190 [ 38.910414] kmem_cache_free+0x10d/0x4d0 [ 38.910957] rcu_core+0x8c8/0x2860 [ 38.911438] __do_softirq+0x1b7/0x7d4 [ 38.911946] [ 38.912175] Last potentially related work creation: [ 38.912791] kasan_save_stack+0x22/0x50 [ 38.913326] __kasan_record_aux_stack+0x8e/0xa0 [ 38.913937] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.914645] remove_vma+0x139/0x170 [ 38.915126] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.915715] do_vmi_munmap+0x1f1/0x2b0 [ 38.916235] __vm_munmap+0x138/0x3a0 [ 38.916731] __x64_sys_munmap+0x59/0x80 [ 38.917258] do_syscall_64+0x3f/0x90 [ 38.917767] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.918463] [ 38.918693] The buggy address belongs to the object at ffff888015c583a0 [ 38.918693] which belongs to the cache vm_area_struct of size 168 [ 38.920250] The buggy address is located 88 bytes inside of [ 38.920250] freed 168-byte region [ffff888015c583a0, ffff888015c58448) [ 38.921763] [ 38.921992] The buggy address belongs to the physical page: [ 38.922704] page:000000003829957d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15c58 [ 38.923873] memcg:ffff888017fdb601 [ 38.924350] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.925036] page_type: 0xffffffff() [ 38.925516] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.926508] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017fdb601 [ 38.927468] page dumped because: kasan: bad access detected [ 38.928174] [ 38.928403] Memory state around the buggy address: [ 38.929013] ffff888015c58280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.929917] ffff888015c58300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.930838] >ffff888015c58380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.931744] ^ [ 38.932649] ffff888015c58400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.933563] ffff888015c58480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.934484] ================================================================== [ 38.935521] Disabling lock debugging due to kernel taint [ 40.952406] BUG: Bad rss-counter state mm:00000000ec2ef645 type:MM_FILEPAGES val:33 [ 40.953469] BUG: Bad rss-counter state mm:00000000ec2ef645 type:MM_ANONPAGES val:22 [ 41.508231] BUG: Bad rss-counter state mm:00000000539c4604 type:MM_FILEPAGES val:33 [ 41.509308] BUG: Bad rss-counter state mm:00000000539c4604 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18460' (ECDSA) to the list of known hosts. 2023/06/21 03:02:13 fuzzer started 2023/06/21 03:02:13 dialing manager at localhost:36067 2023/06/21 03:02:13 checking machine... 2023/06/21 03:02:13 checking revisions... [ 42.184904] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:02:13 testing simple program... [ 42.213804] cgroup: Unknown subsys name 'net' [ 42.242836] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:02:13 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffffffff8542a6c0 RCX=0000000000000100 RDX=0000000000000000 RSI=ffffffff814c8467 RDI=ffffffff8542aab4 RBP=ffffffff8542a6c0 RSP=ffff88806ce09a10 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=ffffffff86621198 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88801bfa61b0 RIP=ffffffff8135bdf9 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 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=00007f8f3dd33ae0 CR3=0000000015e06000 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=32303a3330203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732033313a3230 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343434 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000000b RBX=0000000000000001 RCX=ffffffff8186c9a5 RDX=000000000000000b RSI=ffffffff861437b2 RDI=ffffffff85e050e0 RBP=ffff88800fdb7750 RSP=ffff88800fdb7670 R8 =ffffffff861437b2 R9 =ffff88800fdb7738 R10=0000000000038001 R11=00000000000229c7 R12=ffff88800fdb7758 R13=ffff88800fdb7740 R14=ffff88800fdb7739 R15=ffff88800fdb76f8 RIP=ffffffff8112fc16 RFL=00000212 [----A--] 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 00007f34db789900 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=00007f34dbd410b0 CR3=000000000dd20000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000