syzkaller login: [ 40.967368] BUG: Bad rss-counter state mm:0000000042e5f4ef type:MM_FILEPAGES val:33 [ 40.967945] BUG: Bad rss-counter state mm:0000000042e5f4ef type:MM_ANONPAGES val:22 [ 41.129405] ================================================================== [ 41.130319] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.131268] Read of size 8 at addr ffff88800cbac880 by task sshd/220 [ 41.132054] [ 41.132275] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.133253] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.134240] Call Trace: [ 41.134560] [ 41.134850] dump_stack_lvl+0x91/0xf0 [ 41.135343] print_report+0xcc/0x620 [ 41.135843] ? __virt_addr_valid+0x102/0x340 [ 41.136427] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.137050] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.137675] kasan_report+0xbe/0xf0 [ 41.138153] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.138780] vma_interval_tree_remove+0xc75/0xec0 [ 41.139378] vma_prepare+0xc54/0x11a0 [ 41.139859] __split_vma+0x5af/0x950 [ 41.140337] ? __pfx___split_vma+0x10/0x10 [ 41.140881] ? find_held_lock+0x2c/0x110 [ 41.141416] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.141981] ? lock_is_held_type+0x9f/0x120 [ 41.142521] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.143127] ? mtree_range_walk+0x632/0x900 [ 41.143679] ? mas_walk+0x5c7/0x7c0 [ 41.144158] do_vmi_munmap+0x1f1/0x2b0 [ 41.144676] mmap_region+0x1f9/0x2660 [ 41.145159] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.145677] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.146387] ? __pfx_lock_acquire+0x10/0x10 [ 41.146919] ? __pfx_mmap_region+0x10/0x10 [ 41.147449] ? security_mmap_addr+0x7d/0xa0 [ 41.147979] ? get_unmapped_area+0x1f5/0x3f0 [ 41.148539] do_mmap+0x854/0xf00 [ 41.148977] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.149474] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.150036] ksys_mmap_pgoff+0x3af/0x500 [ 41.150544] do_syscall_64+0x3f/0x90 [ 41.151026] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.151674] RIP: 0033:0x7fc28f86bd82 [ 41.152129] 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 [ 41.154256] RSP: 002b:00007ffd828eaa58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.155156] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc28f86bd82 [ 41.156008] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc28eca5000 [ 41.156876] RBP: 00007fc28eca5000 R08: 0000000000000009 R09: 0000000000001000 [ 41.157730] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557978c6bec0 [ 41.158591] R13: 00007ffd828eaa70 R14: 00007ffd828eaaa0 R15: 00007ffd828eae00 [ 41.159451] [ 41.159746] [ 41.159962] Allocated by task 213: [ 41.160410] kasan_save_stack+0x22/0x50 [ 41.160911] kasan_set_track+0x25/0x30 [ 41.161416] __kasan_slab_alloc+0x59/0x70 [ 41.161938] kmem_cache_alloc+0x16b/0x370 [ 41.162456] vm_area_dup+0x20/0x160 [ 41.162916] __split_vma+0x170/0x950 [ 41.163391] split_vma+0xc6/0x110 [ 41.163838] mprotect_fixup+0x8d2/0xb30 [ 41.164362] do_mprotect_pkey+0x87e/0xd40 [ 41.164887] __x64_sys_mprotect+0x78/0xc0 [ 41.165418] do_syscall_64+0x3f/0x90 [ 41.165898] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.166539] [ 41.166756] Freed by task 213: [ 41.167158] kasan_save_stack+0x22/0x50 [ 41.167660] kasan_set_track+0x25/0x30 [ 41.168157] kasan_save_free_info+0x2b/0x50 [ 41.168697] __kasan_slab_free+0x10a/0x190 [ 41.169228] kmem_cache_free+0x10d/0x4d0 [ 41.169739] rcu_core+0x8c8/0x2860 [ 41.170185] __do_softirq+0x1b7/0x7d4 [ 41.170657] [ 41.170875] Last potentially related work creation: [ 41.171457] kasan_save_stack+0x22/0x50 [ 41.171964] __kasan_record_aux_stack+0x8e/0xa0 [ 41.172548] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.173187] remove_vma+0x139/0x170 [ 41.173640] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.174196] do_vmi_munmap+0x1f1/0x2b0 [ 41.174681] __vm_munmap+0x138/0x3a0 [ 41.175146] __x64_sys_munmap+0x59/0x80 [ 41.175643] do_syscall_64+0x3f/0x90 [ 41.176118] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.176778] [ 41.176995] The buggy address belongs to the object at ffff88800cbac828 [ 41.176995] which belongs to the cache vm_area_struct of size 168 [ 41.178448] The buggy address is located 88 bytes inside of [ 41.178448] freed 168-byte region [ffff88800cbac828, ffff88800cbac8d0) [ 41.179848] [ 41.180069] The buggy address belongs to the physical page: [ 41.180748] page:000000008cf31f44 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcbac [ 41.181817] memcg:ffff88800cadb001 [ 41.182246] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 41.182939] page_type: 0xffffffff() [ 41.183392] raw: 0100000000000200 ffff88800879fc80 ffffea000035db40 dead000000000005 [ 41.184309] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cadb001 [ 41.185228] page dumped because: kasan: bad access detected [ 41.185889] [ 41.186107] Memory state around the buggy address: [ 41.186688] ffff88800cbac780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 41.187541] ffff88800cbac800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 41.188402] >ffff88800cbac880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 41.189265] ^ [ 41.189680] ffff88800cbac900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.190533] ffff88800cbac980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 41.191385] ================================================================== [ 41.192393] Disabling lock debugging due to kernel taint [ 43.923452] BUG: Bad rss-counter state mm:00000000fb568c97 type:MM_FILEPAGES val:33 [ 43.924519] BUG: Bad rss-counter state mm:00000000fb568c97 type:MM_ANONPAGES val:22 [ 44.424253] BUG: Bad rss-counter state mm:000000000242d2de type:MM_FILEPAGES val:33 [ 44.425470] BUG: Bad rss-counter state mm:000000000242d2de type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26202' (ECDSA) to the list of known hosts. 2023/06/19 22:43:52 fuzzer started 2023/06/19 22:43:52 dialing manager at localhost:44161 2023/06/19 22:43:52 checking machine... 2023/06/19 22:43:52 checking revisions... [ 45.183271] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:43:52 testing simple program... [ 45.233013] cgroup: Unknown subsys name 'net' [ 45.272911] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:43:49 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007fa443a6bfef RCX=ffffffff812d869a RDX=0000000000000000 RSI=00007fa443a6bfef RDI=ffffffff856529e0 RBP=00007fa443a6bfef RSP=ffff88806ce09a48 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888016bab680 R15=ffff88800cabc410 RIP=ffffffff814c83d6 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 00007fa442c28700 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=00007faf705636f0 CR3=0000000019cfa000 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=2031353a33343a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a33343a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86137501 RDX=1ffff11002023e15 RSI=ffffffff8180cd09 RDI=ffff88801011f050 RBP=ffff88801011f0a8 RSP=ffff88801011efe0 R8 =ffffffff86137542 R9 =ffff88801011f090 R10=0000000000038001 R11=0000000000020d8a R12=ffff88801011f118 R13=0000000000000000 R14=ffff888016891b40 R15=ffff88801011f050 RIP=ffffffff8113062c 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 00007fc6b93e1900 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=00007fc6b93c0020 CR3=000000001bf1c000 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