syzkaller login: [ 61.081044] BUG: Bad rss-counter state mm:00000000c02700c3 type:MM_FILEPAGES val:33 [ 61.082294] BUG: Bad rss-counter state mm:00000000c02700c3 type:MM_ANONPAGES val:22 [ 61.130900] ================================================================== [ 61.131906] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.132848] Read of size 8 at addr ffff88800972f5c8 by task sshd/221 [ 61.133656] [ 61.133876] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.134747] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.135742] Call Trace: [ 61.136061] [ 61.136358] dump_stack_lvl+0x91/0xf0 [ 61.136845] print_report+0xcc/0x620 [ 61.137363] ? __virt_addr_valid+0x102/0x340 [ 61.137914] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.138539] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.139154] kasan_report+0xbe/0xf0 [ 61.139645] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.140298] vma_interval_tree_remove+0xc75/0xec0 [ 61.140947] vma_prepare+0xc54/0x11a0 [ 61.141434] __split_vma+0x5af/0x950 [ 61.141908] ? __pfx___split_vma+0x10/0x10 [ 61.142443] ? find_held_lock+0x2c/0x110 [ 61.142959] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.143528] ? lock_is_held_type+0x9f/0x120 [ 61.144058] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.144673] ? mtree_range_walk+0x632/0x900 [ 61.145242] ? mas_walk+0x5c7/0x7c0 [ 61.145734] do_vmi_munmap+0x1f1/0x2b0 [ 61.146226] mmap_region+0x1f9/0x2660 [ 61.146713] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.147225] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.147936] ? __pfx_lock_acquire+0x10/0x10 [ 61.148488] ? __pfx_mmap_region+0x10/0x10 [ 61.149028] ? security_mmap_addr+0x7d/0xa0 [ 61.149573] ? get_unmapped_area+0x1f5/0x3f0 [ 61.150120] do_mmap+0x854/0xf00 [ 61.150587] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.151081] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.151650] ksys_mmap_pgoff+0x3af/0x500 [ 61.152150] do_syscall_64+0x3f/0x90 [ 61.152638] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.153322] RIP: 0033:0x7f8ef4fd4d82 [ 61.153778] 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 [ 61.155899] RSP: 002b:00007ffc659d23d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.156832] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8ef4fd4d82 [ 61.157729] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8ef440e000 [ 61.158610] RBP: 00007f8ef440e000 R08: 0000000000000009 R09: 0000000000001000 [ 61.159493] R10: 0000000000000812 R11: 0000000000000206 R12: 000056334b9a7ec0 [ 61.160387] R13: 00007ffc659d23f0 R14: 00007ffc659d2420 R15: 00007ffc659d2780 [ 61.161290] [ 61.161590] [ 61.161811] Allocated by task 214: [ 61.162268] kasan_save_stack+0x22/0x50 [ 61.162791] kasan_set_track+0x25/0x30 [ 61.163315] __kasan_slab_alloc+0x59/0x70 [ 61.163856] kmem_cache_alloc+0x16b/0x370 [ 61.164410] vm_area_dup+0x20/0x160 [ 61.164895] __split_vma+0x170/0x950 [ 61.165406] split_vma+0xc6/0x110 [ 61.165858] mprotect_fixup+0x8d2/0xb30 [ 61.166387] do_mprotect_pkey+0x87e/0xd40 [ 61.166917] __x64_sys_mprotect+0x78/0xc0 [ 61.167475] do_syscall_64+0x3f/0x90 [ 61.167964] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.168647] [ 61.168886] Freed by task 214: [ 61.169307] kasan_save_stack+0x22/0x50 [ 61.169830] kasan_set_track+0x25/0x30 [ 61.170366] kasan_save_free_info+0x2b/0x50 [ 61.170918] __kasan_slab_free+0x10a/0x190 [ 61.171482] kmem_cache_free+0x10d/0x4d0 [ 61.172008] rcu_core+0x8c8/0x2860 [ 61.172481] __do_softirq+0x1b7/0x7d4 [ 61.172991] [ 61.173216] Last potentially related work creation: [ 61.173822] kasan_save_stack+0x22/0x50 [ 61.174350] __kasan_record_aux_stack+0x8e/0xa0 [ 61.174946] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.175642] remove_vma+0x139/0x170 [ 61.176104] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.176690] do_vmi_munmap+0x1f1/0x2b0 [ 61.177209] __vm_munmap+0x138/0x3a0 [ 61.177705] __x64_sys_munmap+0x59/0x80 [ 61.178223] do_syscall_64+0x3f/0x90 [ 61.178721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.179390] [ 61.179609] Second to last potentially related work creation: [ 61.180347] kasan_save_stack+0x22/0x50 [ 61.180886] __kasan_record_aux_stack+0x8e/0xa0 [ 61.181486] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.182151] remove_vma+0x139/0x170 [ 61.182625] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.183193] do_vmi_munmap+0x1f1/0x2b0 [ 61.183702] mmap_region+0x1f9/0x2660 [ 61.184202] do_mmap+0x854/0xf00 [ 61.184667] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.185189] ksys_mmap_pgoff+0x3af/0x500 [ 61.185733] do_syscall_64+0x3f/0x90 [ 61.186223] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.186903] [ 61.187123] The buggy address belongs to the object at ffff88800972f570 [ 61.187123] which belongs to the cache vm_area_struct of size 168 [ 61.188666] The buggy address is located 88 bytes inside of [ 61.188666] freed 168-byte region [ffff88800972f570, ffff88800972f618) [ 61.190162] [ 61.190418] The buggy address belongs to the physical page: [ 61.191100] page:000000006312e6b9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x972f [ 61.192243] memcg:ffff88800d614601 [ 61.192695] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.193395] page_type: 0xffffffff() [ 61.193862] raw: 0100000000000200 ffff8880087a0c80 ffffea0000343400 dead000000000008 [ 61.194815] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d614601 [ 61.195779] page dumped because: kasan: bad access detected [ 61.196480] [ 61.196697] Memory state around the buggy address: [ 61.197315] ffff88800972f480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.198202] ffff88800972f500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 61.199096] >ffff88800972f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.199989] ^ [ 61.200695] ffff88800972f600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 61.201619] ffff88800972f680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.202504] ================================================================== [ 61.203978] Disabling lock debugging due to kernel taint [ 61.796512] BUG: Bad rss-counter state mm:000000003a185e27 type:MM_FILEPAGES val:181 [ 61.798225] BUG: Bad rss-counter state mm:000000003a185e27 type:MM_ANONPAGES val:50 [ 63.660007] BUG: Bad rss-counter state mm:0000000029799c87 type:MM_FILEPAGES val:33 [ 63.661178] BUG: Bad rss-counter state mm:0000000029799c87 type:MM_ANONPAGES val:22 [ 64.046934] BUG: Bad rss-counter state mm:0000000004aa210d type:MM_FILEPAGES val:33 [ 64.047931] BUG: Bad rss-counter state mm:0000000004aa210d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58256' (ECDSA) to the list of known hosts. 2023/06/21 01:17:03 fuzzer started 2023/06/21 01:17:04 dialing manager at localhost:36067 2023/06/21 01:17:04 checking machine... 2023/06/21 01:17:04 checking revisions... [ 64.858530] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:17:04 testing simple program... [ 64.896166] cgroup: Unknown subsys name 'net' [ 64.954256] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:17:03 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce39518 RCX=ffffffff812d86ea RDX=1ffff1100d9c72a2 RSI=ffff88800e539b40 RDI=ffff888015b2b680 RBP=ffff88801645f7e8 RSP=ffff88801586fa20 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88806ce39500 R13=ffff888015b2b680 R14=ffff88800e539fe8 R15=ffff88800e539b40 RIP=ffffffff810044cc RFL=00000046 [---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 00007f490aed5700 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=00007f05575a8350 CR3=000000001801c000 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=37313a3130203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3533325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363131 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=dffffc0000000000 RBX=ffff88800e8b7ca8 RCX=0000000000000000 RDX=1ffff11001d16f98 RSI=ffffffff84497610 RDI=ffff88800e8b7cc0 RBP=ffff88800e8b7b40 RSP=ffff88800e8b7ae8 R8 =0000000000000001 R9 =ffffed1001c55a51 R10=ffff88800e2ad28f R11=0000000000000000 R12=0000000000000001 R13=0000000000000cc0 R14=ffff88800e8b7cc0 R15=dffffc0000000000 RIP=ffffffff84497701 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 00007f3398118900 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=00007f33980f7020 CR3=000000000d68e000 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=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