syzkaller login: [ 31.167026] BUG: Bad rss-counter state mm:00000000823ec3a3 type:MM_FILEPAGES val:33 [ 31.168476] BUG: Bad rss-counter state mm:00000000823ec3a3 type:MM_ANONPAGES val:22 [ 31.303630] ================================================================== [ 31.304563] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.305490] Read of size 8 at addr ffff88800f226968 by task sshd/219 [ 31.306357] [ 31.306578] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.307445] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.308423] Call Trace: [ 31.308739] [ 31.309021] dump_stack_lvl+0x91/0xf0 [ 31.309509] print_report+0xcc/0x620 [ 31.309990] ? __virt_addr_valid+0x102/0x340 [ 31.310546] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.311194] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.311806] kasan_report+0xbe/0xf0 [ 31.312279] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.312902] vma_interval_tree_remove+0xc75/0xec0 [ 31.313496] vma_prepare+0xc54/0x11a0 [ 31.313969] __split_vma+0x5af/0x950 [ 31.314440] ? __pfx___split_vma+0x10/0x10 [ 31.314963] ? find_held_lock+0x2c/0x110 [ 31.315494] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.316057] ? lock_is_held_type+0x9f/0x120 [ 31.316592] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.317188] ? mtree_range_walk+0x632/0x900 [ 31.317741] ? mas_walk+0x5c7/0x7c0 [ 31.318212] do_vmi_munmap+0x1f1/0x2b0 [ 31.318698] mmap_region+0x1f9/0x2660 [ 31.319202] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.319710] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.320415] ? __pfx_lock_acquire+0x10/0x10 [ 31.320949] ? __pfx_mmap_region+0x10/0x10 [ 31.321473] ? security_mmap_addr+0x7d/0xa0 [ 31.321997] ? get_unmapped_area+0x1f5/0x3f0 [ 31.322542] do_mmap+0x854/0xf00 [ 31.322975] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.323486] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.324043] ksys_mmap_pgoff+0x3af/0x500 [ 31.324545] do_syscall_64+0x3f/0x90 [ 31.325021] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.325664] RIP: 0033:0x7f401b688d82 [ 31.326115] 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 [ 31.328243] RSP: 002b:00007fffc30854f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.329139] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f401b688d82 [ 31.329980] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f401aac2000 [ 31.330823] RBP: 00007f401aac2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.331679] R10: 0000000000000812 R11: 0000000000000206 R12: 000055daf3079f70 [ 31.332513] R13: 00007fffc3085510 R14: 00007fffc3085540 R15: 00007fffc30858a0 [ 31.333364] [ 31.333658] [ 31.333880] Allocated by task 212: [ 31.334307] kasan_save_stack+0x22/0x50 [ 31.334806] kasan_set_track+0x25/0x30 [ 31.335316] __kasan_slab_alloc+0x59/0x70 [ 31.335843] kmem_cache_alloc+0x16b/0x370 [ 31.336353] vm_area_dup+0x20/0x160 [ 31.336813] __split_vma+0x170/0x950 [ 31.337277] split_vma+0xc6/0x110 [ 31.337716] mprotect_fixup+0x8d2/0xb30 [ 31.338220] do_mprotect_pkey+0x87e/0xd40 [ 31.338736] __x64_sys_mprotect+0x78/0xc0 [ 31.339260] do_syscall_64+0x3f/0x90 [ 31.339727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.340369] [ 31.340589] Freed by task 203: [ 31.340978] kasan_save_stack+0x22/0x50 [ 31.341474] kasan_set_track+0x25/0x30 [ 31.341978] kasan_save_free_info+0x2b/0x50 [ 31.342504] __kasan_slab_free+0x10a/0x190 [ 31.343031] kmem_cache_free+0x10d/0x4d0 [ 31.343543] rcu_core+0x8c8/0x2860 [ 31.343983] __do_softirq+0x1b7/0x7d4 [ 31.344460] [ 31.344673] Last potentially related work creation: [ 31.345253] kasan_save_stack+0x22/0x50 [ 31.345754] __kasan_record_aux_stack+0x8e/0xa0 [ 31.346332] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.346971] remove_vma+0x139/0x170 [ 31.347435] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.347995] do_vmi_munmap+0x1f1/0x2b0 [ 31.348478] __vm_munmap+0x138/0x3a0 [ 31.348940] __x64_sys_munmap+0x59/0x80 [ 31.349436] do_syscall_64+0x3f/0x90 [ 31.349909] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.350551] [ 31.350770] Second to last potentially related work creation: [ 31.351456] kasan_save_stack+0x22/0x50 [ 31.351954] __kasan_record_aux_stack+0x8e/0xa0 [ 31.352524] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.353160] remove_vma+0x139/0x170 [ 31.353610] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.354170] do_vmi_munmap+0x1f1/0x2b0 [ 31.354650] mmap_region+0x1f9/0x2660 [ 31.355138] do_mmap+0x854/0xf00 [ 31.355566] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.356056] ksys_mmap_pgoff+0x3af/0x500 [ 31.356557] do_syscall_64+0x3f/0x90 [ 31.357035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.357678] [ 31.357891] The buggy address belongs to the object at ffff88800f226910 [ 31.357891] which belongs to the cache vm_area_struct of size 168 [ 31.359364] The buggy address is located 88 bytes inside of [ 31.359364] freed 168-byte region [ffff88800f226910, ffff88800f2269b8) [ 31.360760] [ 31.360975] The buggy address belongs to the physical page: [ 31.361629] page:00000000c1262fac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf226 [ 31.362708] memcg:ffff88800eaf7b01 [ 31.363151] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.363791] page_type: 0xffffffff() [ 31.364238] raw: 0100000000000200 ffff8880087a0c80 ffffea000039dd00 dead000000000004 [ 31.365152] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eaf7b01 [ 31.366058] page dumped because: kasan: bad access detected [ 31.366720] [ 31.366934] Memory state around the buggy address: [ 31.367518] ffff88800f226800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.368379] ffff88800f226880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.369231] >ffff88800f226900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.370074] ^ [ 31.370853] ffff88800f226980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.371729] ffff88800f226a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.372575] ================================================================== [ 31.373830] Disabling lock debugging due to kernel taint [ 33.204764] BUG: Bad rss-counter state mm:000000007107bc6e type:MM_FILEPAGES val:33 [ 33.205460] BUG: Bad rss-counter state mm:000000007107bc6e type:MM_ANONPAGES val:22 [ 33.642031] BUG: Bad rss-counter state mm:00000000b56f1a76 type:MM_FILEPAGES val:33 [ 33.643182] BUG: Bad rss-counter state mm:00000000b56f1a76 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32343' (ECDSA) to the list of known hosts. 2023/06/20 12:49:12 fuzzer started 2023/06/20 12:49:12 dialing manager at localhost:36067 2023/06/20 12:49:12 checking machine... 2023/06/20 12:49:12 checking revisions... [ 34.350066] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:49:12 testing simple program... [ 34.399390] cgroup: Unknown subsys name 'net' [ 34.443834] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:49:12 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=000000000000001c RCX=ffffffff8369e05e RDX=1ffff11002b07f70 RSI=000000000000001c RDI=000000000000000f RBP=ffff88800885e1c0 RSP=ffff88801583f890 R8 =0000000000000007 R9 =000000000000000f R10=000000000000001c R11=0000000000000000 R12=000000000000001c R13=0000000000000053 R14=ffff88801583fb80 R15=ffff88801583fa70 RIP=ffffffff814c0438 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 00007f89217bc900 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=00007f5e14531650 CR3=000000000c802000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=fd616deb9c33e75f00000000000ae988 XMM05=a5538b1e3a1c8bc00000000000135428 XMM06=dfcdbad4f1609c370000000000133f50 XMM07=fb795ef6d65770560000000000123048 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb133f RBX=ffffffff85d899fc RCX=ffffffff810bd032 RDX=0000000000000002 RSI=ffffffff8608a556 RDI=ffffffff85d899f8 RBP=ffffffff85d899f8 RSP=ffff888009af7440 R8 =ffffffff8608a556 R9 =ffff888009af7588 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d89a00 R13=ffffffff85d899f8 R14=ffffffff85d899f8 R15=dffffc0000000000 RIP=ffffffff8112fc7a RFL=00000217 [----APC] 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 00007f5e13f7c900 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=00007f5e14533618 CR3=000000000fb50000 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