syzkaller login: [ 29.961317] BUG: Bad rss-counter state mm:00000000ec86278d type:MM_FILEPAGES val:33 [ 29.962515] BUG: Bad rss-counter state mm:00000000ec86278d type:MM_ANONPAGES val:22 [ 30.121058] ================================================================== [ 30.122080] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.123159] Read of size 8 at addr ffff88800f61d880 by task sshd/220 [ 30.124145] [ 30.124397] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.125493] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.126571] Call Trace: [ 30.126917] [ 30.127216] dump_stack_lvl+0x91/0xf0 [ 30.127726] print_report+0xcc/0x620 [ 30.128234] ? __virt_addr_valid+0x102/0x340 [ 30.128814] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.129463] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.130107] kasan_report+0xbe/0xf0 [ 30.130619] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.131282] vma_interval_tree_remove+0xc75/0xec0 [ 30.131924] vma_prepare+0xc54/0x11a0 [ 30.132443] __split_vma+0x5af/0x950 [ 30.132960] ? __pfx___split_vma+0x10/0x10 [ 30.133538] ? find_held_lock+0x2c/0x110 [ 30.134111] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.134730] ? lock_is_held_type+0x9f/0x120 [ 30.135335] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.135983] ? mtree_range_walk+0x632/0x900 [ 30.136564] ? mas_walk+0x5c7/0x7c0 [ 30.137062] do_vmi_munmap+0x1f1/0x2b0 [ 30.137571] mmap_region+0x1f9/0x2660 [ 30.138082] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.138623] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.139383] ? __pfx_lock_acquire+0x10/0x10 [ 30.139945] ? __pfx_mmap_region+0x10/0x10 [ 30.140502] ? security_mmap_addr+0x7d/0xa0 [ 30.141062] ? get_unmapped_area+0x1f5/0x3f0 [ 30.141643] do_mmap+0x854/0xf00 [ 30.142107] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.142625] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.143244] ksys_mmap_pgoff+0x3af/0x500 [ 30.143769] do_syscall_64+0x3f/0x90 [ 30.144267] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.144945] RIP: 0033:0x7f1b9efaed82 [ 30.145420] 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 [ 30.147648] RSP: 002b:00007ffcba264ca8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.148598] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1b9efaed82 [ 30.149468] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1b9e3e8000 [ 30.150321] RBP: 00007f1b9e3e8000 R08: 0000000000000009 R09: 0000000000001000 [ 30.151189] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b748924ec0 [ 30.152055] R13: 00007ffcba264cc0 R14: 00007ffcba264cf0 R15: 00007ffcba265050 [ 30.152918] [ 30.153208] [ 30.153425] Allocated by task 213: [ 30.153859] kasan_save_stack+0x22/0x50 [ 30.154370] kasan_set_track+0x25/0x30 [ 30.154878] __kasan_slab_alloc+0x59/0x70 [ 30.155402] kmem_cache_alloc+0x16b/0x370 [ 30.155921] vm_area_dup+0x20/0x160 [ 30.156372] __split_vma+0x170/0x950 [ 30.156840] split_vma+0xc6/0x110 [ 30.157282] mprotect_fixup+0x8d2/0xb30 [ 30.157785] do_mprotect_pkey+0x87e/0xd40 [ 30.158306] __x64_sys_mprotect+0x78/0xc0 [ 30.158842] do_syscall_64+0x3f/0x90 [ 30.159318] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.159958] [ 30.160173] Freed by task 213: [ 30.160562] kasan_save_stack+0x22/0x50 [ 30.161066] kasan_set_track+0x25/0x30 [ 30.161557] kasan_save_free_info+0x2b/0x50 [ 30.162093] __kasan_slab_free+0x10a/0x190 [ 30.162632] kmem_cache_free+0x10d/0x4d0 [ 30.163162] rcu_core+0x8c8/0x2860 [ 30.163608] __do_softirq+0x1b7/0x7d4 [ 30.164089] [ 30.164310] Last potentially related work creation: [ 30.164895] kasan_save_stack+0x22/0x50 [ 30.165394] __kasan_record_aux_stack+0x8e/0xa0 [ 30.165965] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.166607] remove_vma+0x139/0x170 [ 30.167077] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.167634] do_vmi_munmap+0x1f1/0x2b0 [ 30.168115] __vm_munmap+0x138/0x3a0 [ 30.168579] __x64_sys_munmap+0x59/0x80 [ 30.169079] do_syscall_64+0x3f/0x90 [ 30.169554] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.170197] [ 30.170410] The buggy address belongs to the object at ffff88800f61d828 [ 30.170410] which belongs to the cache vm_area_struct of size 168 [ 30.171897] The buggy address is located 88 bytes inside of [ 30.171897] freed 168-byte region [ffff88800f61d828, ffff88800f61d8d0) [ 30.173303] [ 30.173517] The buggy address belongs to the physical page: [ 30.174174] page:00000000296f04d5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf61d [ 30.175332] memcg:ffff888016a97b01 [ 30.175768] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.176414] page_type: 0xffffffff() [ 30.176864] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.177794] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a97b01 [ 30.178715] page dumped because: kasan: bad access detected [ 30.179404] [ 30.179622] Memory state around the buggy address: [ 30.180211] ffff88800f61d780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.181075] ffff88800f61d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.181940] >ffff88800f61d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.182800] ^ [ 30.183240] ffff88800f61d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.184109] ffff88800f61d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.184964] ================================================================== [ 30.185943] Disabling lock debugging due to kernel taint [ 32.167234] BUG: Bad rss-counter state mm:000000004c64841f type:MM_FILEPAGES val:33 [ 32.168348] BUG: Bad rss-counter state mm:000000004c64841f type:MM_ANONPAGES val:22 [ 32.622155] BUG: Bad rss-counter state mm:0000000090f8cc7b type:MM_FILEPAGES val:33 [ 32.623165] BUG: Bad rss-counter state mm:0000000090f8cc7b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10794' (ECDSA) to the list of known hosts. 2023/06/21 10:43:28 fuzzer started 2023/06/21 10:43:28 dialing manager at localhost:36067 2023/06/21 10:43:28 checking machine... 2023/06/21 10:43:28 checking revisions... [ 33.315214] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:43:28 testing simple program... [ 33.369522] cgroup: Unknown subsys name 'net' [ 33.408780] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:43:27 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800fe1f810 RCX=ffffffff86138e01 RDX=1ffff11001fc3f03 RSI=ffffffff8180ce89 RDI=ffff88800fe1f818 RBP=0000000000000002 RSP=ffff88800fe1f728 R8 =ffffffff86138eb4 R9 =ffff88800fe1f788 R10=0000000000038001 R11=0000000000020d9c R12=ffff88800fe1f810 R13=0000000000000000 R14=ffff888015b41b40 R15=0000000000000cc0 RIP=ffffffff813ad4cf RFL=00000283 [--S---C] 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 00007fdb994f9900 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=00007ffd40c36000 CR3=000000000eb30000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=0000000000000002 RDX=1ffff1100d9e1359 RSI=ffff88806cf09e38 RDI=ffff88806cf09ac8 RBP=ffff888009a9f400 RSP=ffff88806cf09a08 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff88806cf09e38 R15=ffff88806cf09a78 RIP=ffffffff81131252 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 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=00007efc593a50c8 CR3=0000000016960000 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=2037323a33343a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a33343a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000