syzkaller login: [ 31.189759] BUG: Bad rss-counter state mm:0000000082984dfe type:MM_FILEPAGES val:33 [ 31.191395] BUG: Bad rss-counter state mm:0000000082984dfe type:MM_ANONPAGES val:22 [ 31.355707] ================================================================== [ 31.356613] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.357541] Read of size 8 at addr ffff88800c70b4e0 by task sshd/220 [ 31.358308] [ 31.358530] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.359533] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.360515] Call Trace: [ 31.360836] [ 31.361119] dump_stack_lvl+0x91/0xf0 [ 31.361631] print_report+0xcc/0x620 [ 31.362122] ? __virt_addr_valid+0x102/0x340 [ 31.362671] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.363281] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.363904] kasan_report+0xbe/0xf0 [ 31.364376] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.365005] vma_interval_tree_remove+0xc75/0xec0 [ 31.365611] vma_prepare+0xc54/0x11a0 [ 31.366088] __split_vma+0x5af/0x950 [ 31.366563] ? __pfx___split_vma+0x10/0x10 [ 31.367094] ? find_held_lock+0x2c/0x110 [ 31.367615] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.368186] ? lock_is_held_type+0x9f/0x120 [ 31.368733] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.369342] ? mtree_range_walk+0x632/0x900 [ 31.369892] ? mas_walk+0x5c7/0x7c0 [ 31.370373] do_vmi_munmap+0x1f1/0x2b0 [ 31.370866] mmap_region+0x1f9/0x2660 [ 31.371349] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.371880] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.372592] ? __pfx_lock_acquire+0x10/0x10 [ 31.373169] ? __pfx_mmap_region+0x10/0x10 [ 31.373733] ? security_mmap_addr+0x7d/0xa0 [ 31.374304] ? get_unmapped_area+0x1f5/0x3f0 [ 31.374884] do_mmap+0x854/0xf00 [ 31.375354] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.375893] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.376487] ksys_mmap_pgoff+0x3af/0x500 [ 31.377020] do_syscall_64+0x3f/0x90 [ 31.377521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.378197] RIP: 0033:0x7efd26e85d82 [ 31.378686] 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 [ 31.380977] RSP: 002b:00007ffde939b728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.381929] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efd26e85d82 [ 31.382821] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efd262bf000 [ 31.383723] RBP: 00007efd262bf000 R08: 0000000000000009 R09: 0000000000001000 [ 31.384622] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558ea3f28ec0 [ 31.385526] R13: 00007ffde939b740 R14: 00007ffde939b770 R15: 00007ffde939bad0 [ 31.386431] [ 31.386736] [ 31.386959] Allocated by task 213: [ 31.387405] kasan_save_stack+0x22/0x50 [ 31.387952] kasan_set_track+0x25/0x30 [ 31.388474] __kasan_slab_alloc+0x59/0x70 [ 31.389028] kmem_cache_alloc+0x16b/0x370 [ 31.389580] vm_area_dup+0x20/0x160 [ 31.390056] __split_vma+0x170/0x950 [ 31.390555] split_vma+0xc6/0x110 [ 31.391028] mprotect_fixup+0x8d2/0xb30 [ 31.391554] do_mprotect_pkey+0x87e/0xd40 [ 31.392110] __x64_sys_mprotect+0x78/0xc0 [ 31.392664] do_syscall_64+0x3f/0x90 [ 31.393168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.393852] [ 31.394078] Freed by task 213: [ 31.394496] kasan_save_stack+0x22/0x50 [ 31.395026] kasan_set_track+0x25/0x30 [ 31.395554] kasan_save_free_info+0x2b/0x50 [ 31.396114] __kasan_slab_free+0x10a/0x190 [ 31.396668] kmem_cache_free+0x10d/0x4d0 [ 31.397221] rcu_core+0x8c8/0x2860 [ 31.397698] __do_softirq+0x1b7/0x7d4 [ 31.398205] [ 31.398427] Last potentially related work creation: [ 31.399047] kasan_save_stack+0x22/0x50 [ 31.399588] __kasan_record_aux_stack+0x8e/0xa0 [ 31.400228] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.400919] remove_vma+0x139/0x170 [ 31.401402] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.401990] do_vmi_munmap+0x1f1/0x2b0 [ 31.402512] __vm_munmap+0x138/0x3a0 [ 31.402995] __x64_sys_munmap+0x59/0x80 [ 31.403522] do_syscall_64+0x3f/0x90 [ 31.404022] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.404695] [ 31.404920] Second to last potentially related work creation: [ 31.405655] kasan_save_stack+0x22/0x50 [ 31.406193] __kasan_record_aux_stack+0x8e/0xa0 [ 31.406791] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.407479] remove_vma+0x139/0x170 [ 31.407985] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.408585] do_vmi_munmap+0x1f1/0x2b0 [ 31.409109] mmap_region+0x1f9/0x2660 [ 31.409612] do_mmap+0x854/0xf00 [ 31.410063] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.410577] ksys_mmap_pgoff+0x3af/0x500 [ 31.411102] do_syscall_64+0x3f/0x90 [ 31.411598] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.412286] [ 31.412516] The buggy address belongs to the object at ffff88800c70b488 [ 31.412516] which belongs to the cache vm_area_struct of size 168 [ 31.414099] The buggy address is located 88 bytes inside of [ 31.414099] freed 168-byte region [ffff88800c70b488, ffff88800c70b530) [ 31.415535] [ 31.415769] The buggy address belongs to the physical page: [ 31.416437] page:0000000098f5f986 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc70b [ 31.417523] memcg:ffff88800d0cbb01 [ 31.417943] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.418579] page_type: 0xffffffff() [ 31.419032] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.419949] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d0cbb01 [ 31.420856] page dumped because: kasan: bad access detected [ 31.421515] [ 31.421728] Memory state around the buggy address: [ 31.422315] ffff88800c70b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.423166] ffff88800c70b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.424092] >ffff88800c70b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.424993] ^ [ 31.425784] ffff88800c70b500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.426693] ffff88800c70b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.427608] ================================================================== [ 31.428792] Disabling lock debugging due to kernel taint [ 33.466035] BUG: Bad rss-counter state mm:00000000936885f2 type:MM_FILEPAGES val:33 [ 33.467054] BUG: Bad rss-counter state mm:00000000936885f2 type:MM_ANONPAGES val:22 [ 33.845509] BUG: Bad rss-counter state mm:00000000d6e96436 type:MM_FILEPAGES val:33 [ 33.846473] BUG: Bad rss-counter state mm:00000000d6e96436 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57885' (ECDSA) to the list of known hosts. 2023/06/21 02:34:42 fuzzer started 2023/06/21 02:34:42 dialing manager at localhost:36067 2023/06/21 02:34:42 checking machine... 2023/06/21 02:34:42 checking revisions... [ 34.544889] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:34:42 testing simple program... [ 34.591468] cgroup: Unknown subsys name 'net' [ 34.627490] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:34:42 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f67a37a5477 RCX=0000000000000000 RDX=ffff88800fa1b680 RSI=ffffffff81007b6c RDI=0000000000000005 RBP=0000000000000001 RSP=ffff8880161978e8 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=00000000000b6a61 R12=ffff888016197a28 R13=0000000000000000 R14=ffff88800fa1b680 R15=0000000000000001 RIP=ffffffff81007b6c RFL=00000293 [--S-A-C] 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 00007f67a32b2900 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=00007f67a386a0b0 CR3=000000000c4cc000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007fff43854698 CR3=000000000e8e8000 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=2031343a34333a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a34333a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000