syzkaller login: [ 35.408573] BUG: Bad rss-counter state mm:000000001bf0c28b type:MM_FILEPAGES val:33 [ 35.409344] BUG: Bad rss-counter state mm:000000001bf0c28b type:MM_ANONPAGES val:22 [ 35.588790] ================================================================== [ 35.589818] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.590865] Read of size 8 at addr ffff88800eba03f8 by task sshd/219 [ 35.591883] [ 35.592133] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.593098] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.594210] Call Trace: [ 35.594570] [ 35.594884] dump_stack_lvl+0x91/0xf0 [ 35.595468] print_report+0xcc/0x620 [ 35.596006] ? __virt_addr_valid+0x102/0x340 [ 35.596603] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.597274] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.597956] kasan_report+0xbe/0xf0 [ 35.598483] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.599178] vma_interval_tree_remove+0xc75/0xec0 [ 35.599845] vma_prepare+0xc54/0x11a0 [ 35.600389] __split_vma+0x5af/0x950 [ 35.600914] ? __pfx___split_vma+0x10/0x10 [ 35.601500] ? find_held_lock+0x2c/0x110 [ 35.602074] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.602696] ? lock_is_held_type+0x9f/0x120 [ 35.603305] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.603980] ? mtree_range_walk+0x632/0x900 [ 35.604587] ? mas_walk+0x5c7/0x7c0 [ 35.605116] do_vmi_munmap+0x1f1/0x2b0 [ 35.605660] mmap_region+0x1f9/0x2660 [ 35.606195] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.606759] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.607557] ? __pfx_lock_acquire+0x10/0x10 [ 35.608149] ? __pfx_mmap_region+0x10/0x10 [ 35.608724] ? security_mmap_addr+0x7d/0xa0 [ 35.609314] ? get_unmapped_area+0x1f5/0x3f0 [ 35.609917] do_mmap+0x854/0xf00 [ 35.610404] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.610945] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.611561] ksys_mmap_pgoff+0x3af/0x500 [ 35.612120] do_syscall_64+0x3f/0x90 [ 35.612636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.613348] RIP: 0033:0x7f99926a8d82 [ 35.613854] 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 [ 35.616216] RSP: 002b:00007ffc5db75f68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.617220] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f99926a8d82 [ 35.618157] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9991ae2000 [ 35.619097] RBP: 00007f9991ae2000 R08: 0000000000000009 R09: 0000000000001000 [ 35.620040] R10: 0000000000000812 R11: 0000000000000206 R12: 00005596d4d47d90 [ 35.620969] R13: 00007ffc5db75f80 R14: 00007ffc5db75fb0 R15: 00007ffc5db76310 [ 35.621915] [ 35.622238] [ 35.622472] Allocated by task 212: [ 35.622935] kasan_save_stack+0x22/0x50 [ 35.623485] kasan_set_track+0x25/0x30 [ 35.624029] __kasan_slab_alloc+0x59/0x70 [ 35.624605] kmem_cache_alloc+0x16b/0x370 [ 35.625176] vm_area_dup+0x20/0x160 [ 35.625680] __split_vma+0x170/0x950 [ 35.626198] split_vma+0xc6/0x110 [ 35.626681] mprotect_fixup+0x8d2/0xb30 [ 35.627252] do_mprotect_pkey+0x87e/0xd40 [ 35.627830] __x64_sys_mprotect+0x78/0xc0 [ 35.628405] do_syscall_64+0x3f/0x90 [ 35.628929] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.629632] [ 35.629878] Freed by task 19: [ 35.630331] kasan_save_stack+0x22/0x50 [ 35.630913] kasan_set_track+0x25/0x30 [ 35.631492] kasan_save_free_info+0x2b/0x50 [ 35.632106] __kasan_slab_free+0x10a/0x190 [ 35.632720] kmem_cache_free+0x10d/0x4d0 [ 35.633316] rcu_core+0x8c8/0x2860 [ 35.633829] __do_softirq+0x1b7/0x7d4 [ 35.634387] [ 35.634636] Last potentially related work creation: [ 35.635331] kasan_save_stack+0x22/0x50 [ 35.635920] __kasan_record_aux_stack+0x8e/0xa0 [ 35.636583] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.637329] remove_vma+0x139/0x170 [ 35.637851] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.638458] do_vmi_munmap+0x1f1/0x2b0 [ 35.638986] __vm_munmap+0x138/0x3a0 [ 35.639508] __x64_sys_munmap+0x59/0x80 [ 35.640051] do_syscall_64+0x3f/0x90 [ 35.640566] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.641263] [ 35.641494] Second to last potentially related work creation: [ 35.642231] kasan_save_stack+0x22/0x50 [ 35.642780] __kasan_record_aux_stack+0x8e/0xa0 [ 35.643414] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.644117] remove_vma+0x139/0x170 [ 35.644612] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.645217] do_vmi_munmap+0x1f1/0x2b0 [ 35.645750] mmap_region+0x1f9/0x2660 [ 35.646274] do_mmap+0x854/0xf00 [ 35.646742] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.647282] ksys_mmap_pgoff+0x3af/0x500 [ 35.647831] do_syscall_64+0x3f/0x90 [ 35.648343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.649047] [ 35.649278] The buggy address belongs to the object at ffff88800eba03a0 [ 35.649278] which belongs to the cache vm_area_struct of size 168 [ 35.650873] The buggy address is located 88 bytes inside of [ 35.650873] freed 168-byte region [ffff88800eba03a0, ffff88800eba0448) [ 35.652401] [ 35.652636] The buggy address belongs to the physical page: [ 35.653356] page:000000008d4e7a1f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeba0 [ 35.654538] memcg:ffff88800e7e0a01 [ 35.655073] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.655994] page_type: 0xffffffff() [ 35.656492] raw: 0100000000000200 ffff88800879fc80 ffffea0000369000 dead000000000003 [ 35.657504] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7e0a01 [ 35.658508] page dumped because: kasan: bad access detected [ 35.659251] [ 35.659490] Memory state around the buggy address: [ 35.660160] ffff88800eba0280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 35.661108] ffff88800eba0300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 35.662060] >ffff88800eba0380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 35.662991] ^ [ 35.663915] ffff88800eba0400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.664850] ffff88800eba0480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.665776] ================================================================== [ 35.667203] Disabling lock debugging due to kernel taint [ 37.942172] BUG: Bad rss-counter state mm:000000006acba186 type:MM_FILEPAGES val:33 [ 37.943646] BUG: Bad rss-counter state mm:000000006acba186 type:MM_ANONPAGES val:22 [ 38.415549] BUG: Bad rss-counter state mm:00000000b447c8d2 type:MM_FILEPAGES val:33 [ 38.417198] BUG: Bad rss-counter state mm:00000000b447c8d2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63868' (ECDSA) to the list of known hosts. 2023/06/20 03:51:10 fuzzer started 2023/06/20 03:51:10 dialing manager at localhost:44161 2023/06/20 03:51:10 checking machine... 2023/06/20 03:51:10 checking revisions... [ 39.144191] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:51:10 testing simple program... [ 39.194390] cgroup: Unknown subsys name 'net' [ 39.243604] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:51:05 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000004e RCX=00007f48ffdfa014 RDX=0000000000000001 RSI=0000000000000081 RDI=00005608bfe14c50 RBP=00005608bfe148c0 RSP=00007f48ff7b7620 R8 =00005608bfe14e68 R9 =00005608bfe14e88 R10=0000000000000000 R11=0000000000000246 R12=0000000000000000 R13=00007f48f4007da0 R14=00007f48f4000ba0 R15=00007f48ff7b7788 RIP=00005608bf4656bd RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f48ff7bb700 00000000 00000000 GS =0000 0000000000000000 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=00007f09e1601ac0 CR3=000000000fbe2000 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=31353a3330203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732039303a3135 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303530 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=0000000000000006 RBX=0000000000000001 RCX=ffffffff8180c8d9 RDX=0000000000000006 RSI=ffffffff861375e0 RDI=ffffffff85dfca8c RBP=ffff888018d0fa30 RSP=ffff888018d0f930 R8 =ffffffff861375e0 R9 =ffff888018d0fa18 R10=0000000000038001 R11=0000000000020dae R12=ffffffff85dfcaa0 R13=ffff888018d0fa20 R14=ffff888018d0fa19 R15=ffff888018d0f9d8 RIP=ffffffff8112fc21 RFL=00000216 [----AP-] 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 00007f1e647d0900 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=00007ffc73ce4000 CR3=000000000e3f6000 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=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