syzkaller login: [ 40.724460] BUG: Bad rss-counter state mm:0000000096dbe3bc type:MM_FILEPAGES val:33 [ 40.725213] BUG: Bad rss-counter state mm:0000000096dbe3bc type:MM_ANONPAGES val:22 [ 40.897957] ================================================================== [ 40.898715] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.899508] Read of size 8 at addr ffff88800d8a6968 by task sshd/220 [ 40.900132] [ 40.900312] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.901018] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.901837] Call Trace: [ 40.902103] [ 40.902342] dump_stack_lvl+0x91/0xf0 [ 40.902769] print_report+0xcc/0x620 [ 40.903163] ? __virt_addr_valid+0x102/0x340 [ 40.903638] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.904156] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.904672] kasan_report+0xbe/0xf0 [ 40.905074] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.905578] vma_interval_tree_remove+0xc75/0xec0 [ 40.906078] vma_prepare+0xc54/0x11a0 [ 40.906468] __split_vma+0x5af/0x950 [ 40.906857] ? __pfx___split_vma+0x10/0x10 [ 40.907284] ? find_held_lock+0x2c/0x110 [ 40.907712] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.908178] ? lock_is_held_type+0x9f/0x120 [ 40.908615] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.909106] ? mtree_range_walk+0x632/0x900 [ 40.909561] ? mas_walk+0x5c7/0x7c0 [ 40.909966] do_vmi_munmap+0x1f1/0x2b0 [ 40.910369] mmap_region+0x1f9/0x2660 [ 40.910760] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.911174] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.911753] ? __pfx_lock_acquire+0x10/0x10 [ 40.912191] ? __pfx_mmap_region+0x10/0x10 [ 40.912625] ? security_mmap_addr+0x7d/0xa0 [ 40.913056] ? get_unmapped_area+0x1f5/0x3f0 [ 40.913502] do_mmap+0x854/0xf00 [ 40.913877] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.914279] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.914733] ksys_mmap_pgoff+0x3af/0x500 [ 40.915147] do_syscall_64+0x3f/0x90 [ 40.915532] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.916059] RIP: 0033:0x7fc8c97d0d82 [ 40.916430] 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 [ 40.918158] RSP: 002b:00007fffe441e4c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.918896] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc8c97d0d82 [ 40.919585] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc8c8c0a000 [ 40.920275] RBP: 00007fc8c8c0a000 R08: 0000000000000009 R09: 0000000000001000 [ 40.920958] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b48794cec0 [ 40.921647] R13: 00007fffe441e4e0 R14: 00007fffe441e510 R15: 00007fffe441e870 [ 40.922370] [ 40.922607] [ 40.922781] Allocated by task 213: [ 40.923128] kasan_save_stack+0x22/0x50 [ 40.923534] kasan_set_track+0x25/0x30 [ 40.923932] __kasan_slab_alloc+0x59/0x70 [ 40.924353] kmem_cache_alloc+0x16b/0x370 [ 40.924771] vm_area_dup+0x20/0x160 [ 40.925138] __split_vma+0x170/0x950 [ 40.925513] split_vma+0xc6/0x110 [ 40.926026] mprotect_fixup+0x8d2/0xb30 [ 40.926663] do_mprotect_pkey+0x87e/0xd40 [ 40.927318] __x64_sys_mprotect+0x78/0xc0 [ 40.927973] do_syscall_64+0x3f/0x90 [ 40.928566] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.929362] [ 40.929635] Freed by task 204: [ 40.930311] kasan_save_stack+0x22/0x50 [ 40.930977] kasan_set_track+0x25/0x30 [ 40.931605] kasan_save_free_info+0x2b/0x50 [ 40.932284] __kasan_slab_free+0x10a/0x190 [ 40.932962] kmem_cache_free+0x10d/0x4d0 [ 40.933606] rcu_core+0x8c8/0x2860 [ 40.934173] __do_softirq+0x1b7/0x7d4 [ 40.934768] [ 40.935036] Last potentially related work creation: [ 40.935759] kasan_save_stack+0x22/0x50 [ 40.936391] __kasan_record_aux_stack+0x8e/0xa0 [ 40.937123] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.937968] remove_vma+0x139/0x170 [ 40.938448] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.938893] do_vmi_munmap+0x1f1/0x2b0 [ 40.939347] __vm_munmap+0x138/0x3a0 [ 40.939751] __x64_sys_munmap+0x59/0x80 [ 40.940169] do_syscall_64+0x3f/0x90 [ 40.940546] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.941050] [ 40.941219] Second to last potentially related work creation: [ 40.941800] kasan_save_stack+0x22/0x50 [ 40.942200] __kasan_record_aux_stack+0x8e/0xa0 [ 40.942657] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.943183] remove_vma+0x139/0x170 [ 40.943542] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.943982] do_vmi_munmap+0x1f1/0x2b0 [ 40.944366] __vm_munmap+0x138/0x3a0 [ 40.944760] __x64_sys_munmap+0x59/0x80 [ 40.945158] do_syscall_64+0x3f/0x90 [ 40.945543] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.946077] [ 40.946247] The buggy address belongs to the object at ffff88800d8a6910 [ 40.946247] which belongs to the cache vm_area_struct of size 168 [ 40.947405] The buggy address is located 88 bytes inside of [ 40.947405] freed 168-byte region [ffff88800d8a6910, ffff88800d8a69b8) [ 40.948545] [ 40.948716] The buggy address belongs to the physical page: [ 40.949237] page:000000001911071e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd8a6 [ 40.950129] memcg:ffff88800da27101 [ 40.950467] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.951023] page_type: 0xffffffff() [ 40.951375] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 40.952099] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da27101 [ 40.952843] page dumped because: kasan: bad access detected [ 40.953366] [ 40.953540] Memory state around the buggy address: [ 40.954007] ffff88800d8a6800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 40.954708] ffff88800d8a6880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 40.955412] >ffff88800d8a6900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.956080] ^ [ 40.956710] ffff88800d8a6980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 40.957401] ffff88800d8a6a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.958096] ================================================================== [ 40.959281] Disabling lock debugging due to kernel taint [ 42.912470] BUG: Bad rss-counter state mm:0000000028e48311 type:MM_FILEPAGES val:33 [ 42.914171] BUG: Bad rss-counter state mm:0000000028e48311 type:MM_ANONPAGES val:22 [ 43.425573] BUG: Bad rss-counter state mm:00000000bb7d5333 type:MM_FILEPAGES val:33 [ 43.426608] BUG: Bad rss-counter state mm:00000000bb7d5333 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28204' (ECDSA) to the list of known hosts. 2023/06/19 23:01:38 fuzzer started 2023/06/19 23:01:38 dialing manager at localhost:44161 2023/06/19 23:01:38 checking machine... 2023/06/19 23:01:38 checking revisions... [ 44.159961] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:01:38 testing simple program... [ 44.216071] cgroup: Unknown subsys name 'net' [ 44.285526] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:01:26 Registers: info registers vcpu 0 RAX=1ffff110011fab8f RBX=ffff888008fd5c48 RCX=1ffff110011d0d1e RDX=dffffc0000000000 RSI=ffff888008f02e00 RDI=ffff888008fd5c78 RBP=ffff888008e868c0 RSP=ffff888016d677b8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff888008f02c00 R13=0000000000000000 R14=ffff88801ba54e88 R15=ffff88801ba54e40 RIP=ffffffff81847504 RFL=00000046 [---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 00007f98b1f95900 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=00007f98b254a650 CR3=000000000c5e8000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800c4e4198 RBX=ffff88801a1388d0 RCX=ffffffff812e00e5 RDX=1ffff110033c7b65 RSI=ffffffff87b86f80 RDI=ffff888019e3db28 RBP=ffff888019e3dab0 RSP=ffff888008e57c98 R8 =0000000000000001 R9 =ffffed10011caf8b R10=0000000000000003 R11=0000000000000128 R12=0000000000000283 R13=ffff888019e3db18 R14=0000000000000000 R15=ffffffff87b86f80 RIP=ffffffff844cc8ca RFL=00000046 [---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 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=00007ff57bff2820 CR3=000000000d7c0000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=24f08034ee78674400000000000ae988 XMM05=43fd0a7f2c16691b0000000000135830 XMM06=c291bd5c70af25b900000000001348d0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000