syzkaller login: [ 31.101085] BUG: Bad rss-counter state mm:000000004e327b93 type:MM_FILEPAGES val:33 [ 31.102327] BUG: Bad rss-counter state mm:000000004e327b93 type:MM_ANONPAGES val:22 [ 31.274421] ================================================================== [ 31.275336] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.276303] Read of size 8 at addr ffff888009567c20 by task sshd/220 [ 31.277190] [ 31.277415] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.278306] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.279326] Call Trace: [ 31.279647] [ 31.279940] dump_stack_lvl+0x91/0xf0 [ 31.280446] print_report+0xcc/0x620 [ 31.280935] ? __virt_addr_valid+0x102/0x340 [ 31.281503] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.282129] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.282784] kasan_report+0xbe/0xf0 [ 31.283281] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.283920] vma_interval_tree_remove+0xc75/0xec0 [ 31.284550] vma_prepare+0xc54/0x11a0 [ 31.285033] __split_vma+0x5af/0x950 [ 31.285524] ? __pfx___split_vma+0x10/0x10 [ 31.286051] ? find_held_lock+0x2c/0x110 [ 31.286605] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.287173] ? lock_is_held_type+0x9f/0x120 [ 31.287734] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.288358] ? mtree_range_walk+0x632/0x900 [ 31.288916] ? mas_walk+0x5c7/0x7c0 [ 31.289407] do_vmi_munmap+0x1f1/0x2b0 [ 31.289915] mmap_region+0x1f9/0x2660 [ 31.290441] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.290958] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.291693] ? __pfx_lock_acquire+0x10/0x10 [ 31.292236] ? __pfx_mmap_region+0x10/0x10 [ 31.292797] ? security_mmap_addr+0x7d/0xa0 [ 31.293336] ? get_unmapped_area+0x1f5/0x3f0 [ 31.293914] do_mmap+0x854/0xf00 [ 31.294372] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.294882] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.295462] ksys_mmap_pgoff+0x3af/0x500 [ 31.295974] do_syscall_64+0x3f/0x90 [ 31.296474] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.297138] RIP: 0033:0x7fd1e7d93d82 [ 31.297619] 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 [ 31.299796] RSP: 002b:00007ffe6fd34b68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.300725] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd1e7d93d82 [ 31.301571] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd1e71cd000 [ 31.302462] RBP: 00007fd1e71cd000 R08: 0000000000000009 R09: 0000000000001000 [ 31.303324] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559f0fec0ec0 [ 31.304172] R13: 00007ffe6fd34b80 R14: 00007ffe6fd34bb0 R15: 00007ffe6fd34f10 [ 31.305044] [ 31.305338] [ 31.305557] Allocated by task 213: [ 31.306005] kasan_save_stack+0x22/0x50 [ 31.306529] kasan_set_track+0x25/0x30 [ 31.307041] __kasan_slab_alloc+0x59/0x70 [ 31.307567] kmem_cache_alloc+0x16b/0x370 [ 31.308101] vm_area_dup+0x20/0x160 [ 31.308559] __split_vma+0x170/0x950 [ 31.309049] split_vma+0xc6/0x110 [ 31.309495] mprotect_fixup+0x8d2/0xb30 [ 31.310010] do_mprotect_pkey+0x87e/0xd40 [ 31.310550] __x64_sys_mprotect+0x78/0xc0 [ 31.311087] do_syscall_64+0x3f/0x90 [ 31.311565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.312219] [ 31.312437] Freed by task 213: [ 31.312840] kasan_save_stack+0x22/0x50 [ 31.313350] kasan_set_track+0x25/0x30 [ 31.313855] kasan_save_free_info+0x2b/0x50 [ 31.314416] __kasan_slab_free+0x10a/0x190 [ 31.314971] kmem_cache_free+0x10d/0x4d0 [ 31.315487] rcu_core+0x8c8/0x2860 [ 31.315948] __do_softirq+0x1b7/0x7d4 [ 31.316431] [ 31.316645] Last potentially related work creation: [ 31.317258] kasan_save_stack+0x22/0x50 [ 31.317764] __kasan_record_aux_stack+0x8e/0xa0 [ 31.318361] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.319018] remove_vma+0x139/0x170 [ 31.319475] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.320045] do_vmi_munmap+0x1f1/0x2b0 [ 31.320537] __vm_munmap+0x138/0x3a0 [ 31.321016] __x64_sys_munmap+0x59/0x80 [ 31.321520] do_syscall_64+0x3f/0x90 [ 31.322000] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.322670] [ 31.322889] The buggy address belongs to the object at ffff888009567bc8 [ 31.322889] which belongs to the cache vm_area_struct of size 168 [ 31.324383] The buggy address is located 88 bytes inside of [ 31.324383] freed 168-byte region [ffff888009567bc8, ffff888009567c70) [ 31.325813] [ 31.326040] The buggy address belongs to the physical page: [ 31.326732] page:00000000f2aba632 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9567 [ 31.327832] memcg:ffff88800dffe401 [ 31.328274] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.328982] page_type: 0xffffffff() [ 31.329450] raw: 0100000000000200 ffff8880087a0c80 ffffea0000380d80 dead000000000007 [ 31.330394] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dffe401 [ 31.331316] page dumped because: kasan: bad access detected [ 31.332002] [ 31.332222] Memory state around the buggy address: [ 31.332812] ffff888009567b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.333708] ffff888009567b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.334596] >ffff888009567c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.335465] ^ [ 31.335999] ffff888009567c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.336870] ffff888009567d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.337738] ================================================================== [ 31.338806] Disabling lock debugging due to kernel taint [ 33.278446] BUG: Bad rss-counter state mm:000000000c38c68d type:MM_FILEPAGES val:33 [ 33.279285] BUG: Bad rss-counter state mm:000000000c38c68d type:MM_ANONPAGES val:22 [ 33.736746] BUG: Bad rss-counter state mm:00000000f091db8c type:MM_FILEPAGES val:33 [ 33.737911] BUG: Bad rss-counter state mm:00000000f091db8c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17534' (ECDSA) to the list of known hosts. 2023/06/20 18:01:02 fuzzer started 2023/06/20 18:01:03 dialing manager at localhost:36067 2023/06/20 18:01:03 checking machine... 2023/06/20 18:01:03 checking revisions... [ 34.448269] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:01:03 testing simple program... [ 34.498140] cgroup: Unknown subsys name 'net' [ 34.544486] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:01:02 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=0000000000000000 RCX=ffffffff8170f1e9 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88800ecc7d90 RSP=ffff88800ecc7bf8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88800ee75220 R13=ffff88800dc8e0e8 R14=ffff88800ecc7db8 R15=000000001a86a067 RIP=ffffffff814c0250 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9f7db2e900 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=00007ffcf0a44d2c CR3=0000000008ec0000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=000000000000000000000000000000ff XMM05=000000000000000000000000000000ff XMM06=152e6e692b31197420322e320f140a00 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007ffea2ae9b18 CR3=000000000ebb0000 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=2032303a31303a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a31303a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000