syzkaller login: [ 38.989141] BUG: Bad rss-counter state mm:00000000475977cf type:MM_FILEPAGES val:33 [ 38.990484] BUG: Bad rss-counter state mm:00000000475977cf type:MM_ANONPAGES val:22 [ 39.130940] ================================================================== [ 39.131937] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.133114] Read of size 8 at addr ffff88800e830310 by task sshd/218 [ 39.134137] [ 39.134389] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.135377] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.136514] Call Trace: [ 39.136876] [ 39.137196] dump_stack_lvl+0x91/0xf0 [ 39.137780] print_report+0xcc/0x620 [ 39.138349] ? __virt_addr_valid+0x102/0x340 [ 39.139001] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.139732] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.140456] kasan_report+0xbe/0xf0 [ 39.141019] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.141759] vma_interval_tree_remove+0xc75/0xec0 [ 39.142487] vma_prepare+0xc54/0x11a0 [ 39.143066] __split_vma+0x5af/0x950 [ 39.143626] ? __pfx___split_vma+0x10/0x10 [ 39.144257] ? find_held_lock+0x2c/0x110 [ 39.144863] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.145552] ? lock_is_held_type+0x9f/0x120 [ 39.146203] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.146895] ? mtree_range_walk+0x632/0x900 [ 39.147543] ? mas_walk+0x5c7/0x7c0 [ 39.148088] do_vmi_munmap+0x1f1/0x2b0 [ 39.148671] mmap_region+0x1f9/0x2660 [ 39.149224] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.149818] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.150625] ? __pfx_lock_acquire+0x10/0x10 [ 39.151234] ? __pfx_mmap_region+0x10/0x10 [ 39.151841] ? security_mmap_addr+0x7d/0xa0 [ 39.152461] ? get_unmapped_area+0x1f5/0x3f0 [ 39.153085] do_mmap+0x854/0xf00 [ 39.153601] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.154166] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.154808] ksys_mmap_pgoff+0x3af/0x500 [ 39.155397] do_syscall_64+0x3f/0x90 [ 39.155935] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.156676] RIP: 0033:0x7fa8917bfd82 [ 39.157196] 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 [ 39.159592] RSP: 002b:00007ffdf72ec508 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.160626] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa8917bfd82 [ 39.161592] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa890bf9000 [ 39.162545] RBP: 00007fa890bf9000 R08: 0000000000000009 R09: 0000000000001000 [ 39.163510] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563e0b78cec0 [ 39.164524] R13: 00007ffdf72ec520 R14: 00007ffdf72ec550 R15: 00007ffdf72ec8b0 [ 39.165552] [ 39.165883] [ 39.166129] Allocated by task 211: [ 39.166608] kasan_save_stack+0x22/0x50 [ 39.167181] kasan_set_track+0x25/0x30 [ 39.167747] __kasan_slab_alloc+0x59/0x70 [ 39.168345] kmem_cache_alloc+0x16b/0x370 [ 39.168933] vm_area_dup+0x20/0x160 [ 39.169460] __split_vma+0x170/0x950 [ 39.169998] split_vma+0xc6/0x110 [ 39.170499] mprotect_fixup+0x8d2/0xb30 [ 39.171063] do_mprotect_pkey+0x87e/0xd40 [ 39.171649] __x64_sys_mprotect+0x78/0xc0 [ 39.172243] do_syscall_64+0x3f/0x90 [ 39.172782] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.173525] [ 39.173755] Freed by task 13: [ 39.174194] kasan_save_stack+0x22/0x50 [ 39.174788] kasan_set_track+0x25/0x30 [ 39.175344] kasan_save_free_info+0x2b/0x50 [ 39.175952] __kasan_slab_free+0x10a/0x190 [ 39.176563] kmem_cache_free+0x10d/0x4d0 [ 39.177156] rcu_core+0x8c8/0x2860 [ 39.177690] __do_softirq+0x1b7/0x7d4 [ 39.178244] [ 39.178488] Last potentially related work creation: [ 39.179150] kasan_save_stack+0x22/0x50 [ 39.179711] __kasan_record_aux_stack+0x8e/0xa0 [ 39.180327] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.181002] remove_vma+0x139/0x170 [ 39.181498] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.182097] do_vmi_munmap+0x1f1/0x2b0 [ 39.182614] __vm_munmap+0x138/0x3a0 [ 39.183113] __x64_sys_munmap+0x59/0x80 [ 39.183641] do_syscall_64+0x3f/0x90 [ 39.184154] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.184839] [ 39.185069] Second to last potentially related work creation: [ 39.185819] kasan_save_stack+0x22/0x50 [ 39.186366] __kasan_record_aux_stack+0x8e/0xa0 [ 39.186979] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.187664] remove_vma+0x139/0x170 [ 39.188148] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.188746] do_vmi_munmap+0x1f1/0x2b0 [ 39.189257] mmap_region+0x1f9/0x2660 [ 39.189773] do_mmap+0x854/0xf00 [ 39.190236] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.190758] ksys_mmap_pgoff+0x3af/0x500 [ 39.191295] do_syscall_64+0x3f/0x90 [ 39.191798] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.192489] [ 39.192716] The buggy address belongs to the object at ffff88800e8302b8 [ 39.192716] which belongs to the cache vm_area_struct of size 168 [ 39.194344] The buggy address is located 88 bytes inside of [ 39.194344] freed 168-byte region [ffff88800e8302b8, ffff88800e830360) [ 39.195892] [ 39.196124] The buggy address belongs to the physical page: [ 39.196820] page:000000005b39d395 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe830 [ 39.197985] memcg:ffff88800d2fe301 [ 39.198443] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.199132] page_type: 0xffffffff() [ 39.199616] raw: 0100000000000200 ffff8880087a0c80 ffffea000039e3c0 dead000000000006 [ 39.200600] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2fe301 [ 39.201575] page dumped because: kasan: bad access detected [ 39.202278] [ 39.202509] Memory state around the buggy address: [ 39.203128] ffff88800e830200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 39.204040] ffff88800e830280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.204966] >ffff88800e830300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.205882] ^ [ 39.206380] ffff88800e830380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 39.207293] ffff88800e830400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 39.208198] ================================================================== [ 39.209255] Disabling lock debugging due to kernel taint [ 41.740368] BUG: Bad rss-counter state mm:00000000aa86b183 type:MM_FILEPAGES val:33 [ 41.741510] BUG: Bad rss-counter state mm:00000000aa86b183 type:MM_ANONPAGES val:22 [ 42.307690] BUG: Bad rss-counter state mm:000000002320440c type:MM_FILEPAGES val:33 [ 42.308947] BUG: Bad rss-counter state mm:000000002320440c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21384' (ECDSA) to the list of known hosts. 2023/06/21 01:40:32 fuzzer started 2023/06/21 01:40:33 dialing manager at localhost:36067 2023/06/21 01:40:33 checking machine... 2023/06/21 01:40:33 checking revisions... [ 42.940293] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:40:33 testing simple program... [ 43.052498] cgroup: Unknown subsys name 'net' [ 43.110833] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:40:32 Registers: info registers vcpu 0 RAX=0100000000010200 RBX=ffff8880147d2a00 RCX=ffffea0000000000 RDX=ffffea000051f401 RSI=ffffffff83675648 RDI=ffff888008fae280 RBP=ffff888017f07780 RSP=ffff888017f07750 R8 =0000000000000005 R9 =0000000000000140 R10=0000000000000140 R11=00000000000b6a61 R12=ffff888008fae280 R13=ffffea000051f400 R14=ffffffff83675648 R15=ffff888019676600 RIP=ffffffff81809a64 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 00007fe5b4b68900 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=00007fff916b8000 CR3=000000000ea00000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000006b876613 RBX=0000000064082720 RCX=ffff88806cf09be8 RDX=0000000000000007 RSI=0000000000000008 RDI=00000000a72be9ce RBP=ffffffff813782f8 RSP=ffff88806cf09b68 R8 =000000006b876613 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=ffff88806cf09bd0 R15=0000000000000007 RIP=ffffffff822704a0 RFL=00000a02 [-O-----] 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=00007fa721e8c880 CR3=000000000ee38000 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=2032333a30343a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a30343a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000