syzkaller login: [ 30.177699] BUG: Bad rss-counter state mm:00000000c42e4d0e type:MM_FILEPAGES val:33 [ 30.179270] BUG: Bad rss-counter state mm:00000000c42e4d0e type:MM_ANONPAGES val:22 [ 30.339703] ================================================================== [ 30.340796] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.342072] Read of size 8 at addr ffff8880094834e0 by task sshd/221 [ 30.342948] [ 30.343174] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.344033] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.345000] Call Trace: [ 30.345317] [ 30.345595] dump_stack_lvl+0x91/0xf0 [ 30.346085] print_report+0xcc/0x620 [ 30.346571] ? __virt_addr_valid+0x102/0x340 [ 30.347127] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.347766] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.348397] kasan_report+0xbe/0xf0 [ 30.348870] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.349495] vma_interval_tree_remove+0xc75/0xec0 [ 30.350111] vma_prepare+0xc54/0x11a0 [ 30.350606] __split_vma+0x5af/0x950 [ 30.351124] ? __pfx___split_vma+0x10/0x10 [ 30.351665] ? find_held_lock+0x2c/0x110 [ 30.352202] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.352794] ? lock_is_held_type+0x9f/0x120 [ 30.353358] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.353979] ? mtree_range_walk+0x632/0x900 [ 30.354550] ? mas_walk+0x5c7/0x7c0 [ 30.355050] do_vmi_munmap+0x1f1/0x2b0 [ 30.355578] mmap_region+0x1f9/0x2660 [ 30.356085] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.356600] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.357315] ? __pfx_lock_acquire+0x10/0x10 [ 30.357844] ? __pfx_mmap_region+0x10/0x10 [ 30.358402] ? security_mmap_addr+0x7d/0xa0 [ 30.358972] ? get_unmapped_area+0x1f5/0x3f0 [ 30.359535] do_mmap+0x854/0xf00 [ 30.359975] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.360485] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.361076] ksys_mmap_pgoff+0x3af/0x500 [ 30.361603] do_syscall_64+0x3f/0x90 [ 30.362096] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.362791] RIP: 0033:0x7f06187a3d82 [ 30.363267] 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 [ 30.365385] RSP: 002b:00007ffd98844578 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.366285] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f06187a3d82 [ 30.367154] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0617bdd000 [ 30.368003] RBP: 00007f0617bdd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.368879] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559a0ee3d980 [ 30.369754] R13: 00007ffd98844590 R14: 00007ffd988445c0 R15: 00007ffd98844920 [ 30.370609] [ 30.370909] [ 30.371123] Allocated by task 214: [ 30.371552] kasan_save_stack+0x22/0x50 [ 30.372066] kasan_set_track+0x25/0x30 [ 30.372577] __kasan_slab_alloc+0x59/0x70 [ 30.373120] kmem_cache_alloc+0x16b/0x370 [ 30.373651] vm_area_dup+0x20/0x160 [ 30.374104] __split_vma+0x170/0x950 [ 30.374570] split_vma+0xc6/0x110 [ 30.375022] mprotect_fixup+0x8d2/0xb30 [ 30.375523] do_mprotect_pkey+0x87e/0xd40 [ 30.376044] __x64_sys_mprotect+0x78/0xc0 [ 30.376562] do_syscall_64+0x3f/0x90 [ 30.377049] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.377720] [ 30.377945] Freed by task 204: [ 30.378341] kasan_save_stack+0x22/0x50 [ 30.378857] kasan_set_track+0x25/0x30 [ 30.379354] kasan_save_free_info+0x2b/0x50 [ 30.379885] __kasan_slab_free+0x10a/0x190 [ 30.380413] kmem_cache_free+0x10d/0x4d0 [ 30.380930] rcu_core+0x8c8/0x2860 [ 30.381373] __do_softirq+0x1b7/0x7d4 [ 30.381848] [ 30.382062] Last potentially related work creation: [ 30.382643] kasan_save_stack+0x22/0x50 [ 30.383294] __kasan_record_aux_stack+0x8e/0xa0 [ 30.383858] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.384512] remove_vma+0x139/0x170 [ 30.384980] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.385560] do_vmi_munmap+0x1f1/0x2b0 [ 30.386047] __vm_munmap+0x138/0x3a0 [ 30.386545] __x64_sys_munmap+0x59/0x80 [ 30.387079] do_syscall_64+0x3f/0x90 [ 30.387568] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.388213] [ 30.388431] The buggy address belongs to the object at ffff888009483488 [ 30.388431] which belongs to the cache vm_area_struct of size 168 [ 30.389907] The buggy address is located 88 bytes inside of [ 30.389907] freed 168-byte region [ffff888009483488, ffff888009483530) [ 30.391381] [ 30.391601] The buggy address belongs to the physical page: [ 30.392274] page:00000000b1fee30c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9483 [ 30.393409] memcg:ffff88801953de01 [ 30.393859] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.394518] page_type: 0xffffffff() [ 30.394989] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.395948] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801953de01 [ 30.396886] page dumped because: kasan: bad access detected [ 30.397548] [ 30.397761] Memory state around the buggy address: [ 30.398338] ffff888009483380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.399193] ffff888009483400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.400044] >ffff888009483480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.400892] ^ [ 30.401653] ffff888009483500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.402539] ffff888009483580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.403430] ================================================================== [ 30.404343] Disabling lock debugging due to kernel taint [ 32.438397] BUG: Bad rss-counter state mm:00000000b71ac06a type:MM_FILEPAGES val:33 [ 32.439157] BUG: Bad rss-counter state mm:00000000b71ac06a type:MM_ANONPAGES val:22 [ 32.873373] BUG: Bad rss-counter state mm:000000001b0722fb type:MM_FILEPAGES val:33 [ 32.874565] BUG: Bad rss-counter state mm:000000001b0722fb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42733' (ECDSA) to the list of known hosts. 2023/06/21 07:17:27 fuzzer started 2023/06/21 07:17:27 dialing manager at localhost:36067 2023/06/21 07:17:27 checking machine... 2023/06/21 07:17:27 checking revisions... [ 33.552764] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:17:27 testing simple program... [ 33.588932] cgroup: Unknown subsys name 'net' [ 33.625264] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:17:27 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff818c1c17 RDX=ffff888015fd0000 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff888014607a28 RSP=ffff888014607950 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000001 R13=dffffc0000000000 R14=ffff888014607a30 R15=ffff888014607a34 RIP=ffffffff814c0864 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 00007fdb40d7f700 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=00007f8c59a28760 CR3=000000000daa2000 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=37313a3730203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732036323a3731 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363938 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=1ffffffff0bb7aff RBX=ffffffff85dbd7f8 RCX=ffffffff813ad71f RDX=0000000000000000 RSI=ffffffff860d8256 RDI=ffffffff85dbd7f8 RBP=ffffffff85dbd7f8 RSP=ffff8880165770a0 R8 =ffffffff860d8256 R9 =ffff888016577198 R10=0000000000038001 R11=0000000000010b8d R12=ffffffff85dbd7f8 R13=ffffffff85dbd7f8 R14=ffffffff85dbd7f8 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 00007f41a1f4c900 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=00007f41a1ef1008 CR3=000000000e870000 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