syzkaller login: [ 31.132788] BUG: Bad rss-counter state mm:000000006c0f0c2f type:MM_FILEPAGES val:33 [ 31.134184] BUG: Bad rss-counter state mm:000000006c0f0c2f type:MM_ANONPAGES val:22 [ 31.277514] ================================================================== [ 31.278417] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.279379] Read of size 8 at addr ffff888015f01140 by task sshd/219 [ 31.280159] [ 31.280372] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.281367] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.282348] Call Trace: [ 31.282670] [ 31.282961] dump_stack_lvl+0x91/0xf0 [ 31.283512] print_report+0xcc/0x620 [ 31.283997] ? __virt_addr_valid+0x102/0x340 [ 31.284547] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.285163] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.285781] kasan_report+0xbe/0xf0 [ 31.286254] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.286880] vma_interval_tree_remove+0xc75/0xec0 [ 31.287499] vma_prepare+0xc54/0x11a0 [ 31.287982] __split_vma+0x5af/0x950 [ 31.288462] ? __pfx___split_vma+0x10/0x10 [ 31.288999] ? find_held_lock+0x2c/0x110 [ 31.289517] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.290079] ? lock_is_held_type+0x9f/0x120 [ 31.290615] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.291233] ? mtree_range_walk+0x632/0x900 [ 31.291781] ? mas_walk+0x5c7/0x7c0 [ 31.292255] do_vmi_munmap+0x1f1/0x2b0 [ 31.292743] mmap_region+0x1f9/0x2660 [ 31.293228] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.293734] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.294445] ? __pfx_lock_acquire+0x10/0x10 [ 31.294979] ? __pfx_mmap_region+0x10/0x10 [ 31.295523] ? security_mmap_addr+0x7d/0xa0 [ 31.296051] ? get_unmapped_area+0x1f5/0x3f0 [ 31.296600] do_mmap+0x854/0xf00 [ 31.297046] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.297537] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.298095] ksys_mmap_pgoff+0x3af/0x500 [ 31.298603] do_syscall_64+0x3f/0x90 [ 31.299090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.299729] RIP: 0033:0x7f804b9bbd82 [ 31.300182] 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 [ 31.302302] RSP: 002b:00007ffcd2fa9fb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.303222] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f804b9bbd82 [ 31.304073] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f804adf5000 [ 31.304920] RBP: 00007f804adf5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.305767] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c63da5cb20 [ 31.306620] R13: 00007ffcd2fa9fd0 R14: 00007ffcd2faa000 R15: 00007ffcd2faa360 [ 31.307491] [ 31.307784] [ 31.307998] Allocated by task 212: [ 31.308423] kasan_save_stack+0x22/0x50 [ 31.308926] kasan_set_track+0x25/0x30 [ 31.309416] __kasan_slab_alloc+0x59/0x70 [ 31.309938] kmem_cache_alloc+0x16b/0x370 [ 31.310448] vm_area_dup+0x20/0x160 [ 31.310900] __split_vma+0x170/0x950 [ 31.311373] split_vma+0xc6/0x110 [ 31.311811] mprotect_fixup+0x8d2/0xb30 [ 31.312317] do_mprotect_pkey+0x87e/0xd40 [ 31.312834] __x64_sys_mprotect+0x78/0xc0 [ 31.313355] do_syscall_64+0x3f/0x90 [ 31.313830] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.314469] [ 31.314684] Freed by task 212: [ 31.315118] kasan_save_stack+0x22/0x50 [ 31.315622] kasan_set_track+0x25/0x30 [ 31.316120] kasan_save_free_info+0x2b/0x50 [ 31.316654] __kasan_slab_free+0x10a/0x190 [ 31.317186] kmem_cache_free+0x10d/0x4d0 [ 31.317688] rcu_core+0x8c8/0x2860 [ 31.318138] __do_softirq+0x1b7/0x7d4 [ 31.318617] [ 31.318834] Last potentially related work creation: [ 31.319431] kasan_save_stack+0x22/0x50 [ 31.319937] __kasan_record_aux_stack+0x8e/0xa0 [ 31.320512] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.321159] remove_vma+0x139/0x170 [ 31.321619] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.322182] do_vmi_munmap+0x1f1/0x2b0 [ 31.322718] __vm_munmap+0x138/0x3a0 [ 31.323213] __x64_sys_munmap+0x59/0x80 [ 31.323729] do_syscall_64+0x3f/0x90 [ 31.324207] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.324853] [ 31.325070] The buggy address belongs to the object at ffff888015f010e8 [ 31.325070] which belongs to the cache vm_area_struct of size 168 [ 31.326528] The buggy address is located 88 bytes inside of [ 31.326528] freed 168-byte region [ffff888015f010e8, ffff888015f01190) [ 31.327938] [ 31.328152] The buggy address belongs to the physical page: [ 31.328808] page:0000000074191a02 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15f01 [ 31.329896] memcg:ffff88800e9da201 [ 31.330323] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.330969] page_type: 0xffffffff() [ 31.331435] raw: 0100000000000200 ffff88800879fc80 ffffea0000314dc0 dead000000000008 [ 31.332352] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9da201 [ 31.333255] page dumped because: kasan: bad access detected [ 31.333913] [ 31.334131] Memory state around the buggy address: [ 31.334707] ffff888015f01000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.335576] ffff888015f01080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.336434] >ffff888015f01100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.337285] ^ [ 31.337918] ffff888015f01180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 31.338774] ffff888015f01200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.339626] ================================================================== [ 31.340623] Disabling lock debugging due to kernel taint [ 33.759088] BUG: Bad rss-counter state mm:00000000f9257330 type:MM_FILEPAGES val:33 [ 33.759798] BUG: Bad rss-counter state mm:00000000f9257330 type:MM_ANONPAGES val:22 [ 34.249786] BUG: Bad rss-counter state mm:0000000053cd7a6a type:MM_FILEPAGES val:33 [ 34.251125] BUG: Bad rss-counter state mm:0000000053cd7a6a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20861' (ECDSA) to the list of known hosts. 2023/06/20 02:29:10 fuzzer started 2023/06/20 02:29:11 dialing manager at localhost:44161 2023/06/20 02:29:11 checking machine... 2023/06/20 02:29:11 checking revisions... [ 35.028298] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:29:11 testing simple program... [ 35.080816] cgroup: Unknown subsys name 'net' [ 35.144227] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:29:10 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008d7f978 RCX=0000000000000001 RDX=1ffff110011aff30 RSI=ffff888008d7fcd0 RDI=ffff888008d7f980 RBP=ffff888008d7fcd0 RSP=ffff888008d7f8d0 R8 =ffffffff86137542 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000020d8a R12=0000000000000008 R13=ffff888008d7f9c0 R14=ffff888008d7fcd8 R15=ffff888008d7f978 RIP=ffffffff81130445 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 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=00007eff989f20b0 CR3=0000000009a00000 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=39323a3230203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303139 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=0000000000000001 RBX=0000000000000000 RCX=ffffffff8153447a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff8880102a7f58 RSP=ffff8880102a7f18 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=000000000000002c R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff81534215 RFL=00000002 [-------] 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 00007eff9843a900 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=00007eff989f1618 CR3=000000000f0a8000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000