syzkaller login: [ 35.738833] BUG: Bad rss-counter state mm:000000005d00f8f0 type:MM_FILEPAGES val:33 [ 35.740031] BUG: Bad rss-counter state mm:000000005d00f8f0 type:MM_ANONPAGES val:22 [ 35.782429] ================================================================== [ 35.783314] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.784242] Read of size 8 at addr ffff88800d7b65c8 by task sshd/219 [ 35.785147] [ 35.785378] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.786241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.787205] Call Trace: [ 35.787526] [ 35.787806] dump_stack_lvl+0x91/0xf0 [ 35.788291] print_report+0xcc/0x620 [ 35.788806] ? __virt_addr_valid+0x102/0x340 [ 35.789359] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.790012] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.790629] kasan_report+0xbe/0xf0 [ 35.791100] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.791724] vma_interval_tree_remove+0xc75/0xec0 [ 35.792336] vma_prepare+0xc54/0x11a0 [ 35.792820] __split_vma+0x5af/0x950 [ 35.793291] ? __pfx___split_vma+0x10/0x10 [ 35.793822] ? find_held_lock+0x2c/0x110 [ 35.794346] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.794910] ? lock_is_held_type+0x9f/0x120 [ 35.795463] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.796065] ? mtree_range_walk+0x632/0x900 [ 35.796622] ? mas_walk+0x5c7/0x7c0 [ 35.797111] do_vmi_munmap+0x1f1/0x2b0 [ 35.797610] mmap_region+0x1f9/0x2660 [ 35.798094] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.798632] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.799382] ? __pfx_lock_acquire+0x10/0x10 [ 35.799942] ? __pfx_mmap_region+0x10/0x10 [ 35.800515] ? security_mmap_addr+0x7d/0xa0 [ 35.801066] ? get_unmapped_area+0x1f5/0x3f0 [ 35.801636] do_mmap+0x854/0xf00 [ 35.802089] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.802602] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.803183] ksys_mmap_pgoff+0x3af/0x500 [ 35.803704] do_syscall_64+0x3f/0x90 [ 35.804196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.804865] RIP: 0033:0x7f7da1769d82 [ 35.805339] 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 [ 35.807559] RSP: 002b:00007fff8712c808 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.808514] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7da1769d82 [ 35.809397] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7da0ba3000 [ 35.810277] RBP: 00007f7da0ba3000 R08: 0000000000000009 R09: 0000000000001000 [ 35.811161] R10: 0000000000000812 R11: 0000000000000206 R12: 00005590140d2ec0 [ 35.811996] R13: 00007fff8712c820 R14: 00007fff8712c850 R15: 00007fff8712cbb0 [ 35.812845] [ 35.813133] [ 35.813354] Allocated by task 211: [ 35.813789] kasan_save_stack+0x22/0x50 [ 35.814288] kasan_set_track+0x25/0x30 [ 35.814776] __kasan_slab_alloc+0x59/0x70 [ 35.815296] kmem_cache_alloc+0x16b/0x370 [ 35.815808] vm_area_dup+0x20/0x160 [ 35.816266] __split_vma+0x170/0x950 [ 35.816738] split_vma+0xc6/0x110 [ 35.817171] mprotect_fixup+0x8d2/0xb30 [ 35.817662] do_mprotect_pkey+0x87e/0xd40 [ 35.818176] __x64_sys_mprotect+0x78/0xc0 [ 35.818693] do_syscall_64+0x3f/0x90 [ 35.819173] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.819807] [ 35.820019] Freed by task 211: [ 35.820412] kasan_save_stack+0x22/0x50 [ 35.820914] kasan_set_track+0x25/0x30 [ 35.821404] kasan_save_free_info+0x2b/0x50 [ 35.821944] __kasan_slab_free+0x10a/0x190 [ 35.822470] kmem_cache_free+0x10d/0x4d0 [ 35.822977] rcu_core+0x8c8/0x2860 [ 35.823414] __do_softirq+0x1b7/0x7d4 [ 35.823881] [ 35.824095] Last potentially related work creation: [ 35.824704] kasan_save_stack+0x22/0x50 [ 35.825206] __kasan_record_aux_stack+0x8e/0xa0 [ 35.825772] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.826404] remove_vma+0x139/0x170 [ 35.826858] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.827404] do_vmi_munmap+0x1f1/0x2b0 [ 35.827889] __vm_munmap+0x138/0x3a0 [ 35.828362] __x64_sys_munmap+0x59/0x80 [ 35.828860] do_syscall_64+0x3f/0x90 [ 35.829326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.829956] [ 35.830167] The buggy address belongs to the object at ffff88800d7b6570 [ 35.830167] which belongs to the cache vm_area_struct of size 168 [ 35.831610] The buggy address is located 88 bytes inside of [ 35.831610] freed 168-byte region [ffff88800d7b6570, ffff88800d7b6618) [ 35.833015] [ 35.833228] The buggy address belongs to the physical page: [ 35.833880] page:000000008c733c47 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd7b6 [ 35.834948] memcg:ffff88800e055c01 [ 35.835364] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.835997] page_type: 0xffffffff() [ 35.836457] raw: 0100000000000200 ffff88800879fc80 ffffea00001a5300 dead000000000002 [ 35.837355] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e055c01 [ 35.838241] page dumped because: kasan: bad access detected [ 35.838893] [ 35.839108] Memory state around the buggy address: [ 35.839683] ffff88800d7b6480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.840529] ffff88800d7b6500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 35.841385] >ffff88800d7b6580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.842219] ^ [ 35.842868] ffff88800d7b6600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 35.843714] ffff88800d7b6680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.844558] ================================================================== [ 35.845810] Disabling lock debugging due to kernel taint [ 37.745373] BUG: Bad rss-counter state mm:00000000921ef773 type:MM_FILEPAGES val:33 [ 37.746602] BUG: Bad rss-counter state mm:00000000921ef773 type:MM_ANONPAGES val:22 [ 38.297982] BUG: Bad rss-counter state mm:00000000689dff9f type:MM_FILEPAGES val:33 [ 38.299145] BUG: Bad rss-counter state mm:00000000689dff9f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37317' (ECDSA) to the list of known hosts. 2023/06/19 22:24:43 fuzzer started 2023/06/19 22:24:43 dialing manager at localhost:44161 2023/06/19 22:24:43 checking machine... 2023/06/19 22:24:43 checking revisions... [ 38.934150] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:24:43 testing simple program... [ 38.982235] cgroup: Unknown subsys name 'net' [ 39.034284] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:24:36 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888014667470 RCX=ffffffff860d68f6 RDX=1ffff110028cce69 RSI=0000000000000000 RDI=ffff888014667348 RBP=ffff888014660000 RSP=ffff8880146672c8 R8 =ffffffff860d68fa R9 =ffff888014667378 R10=0000000000038001 R11=0000000000010b7e R12=ffff888014667398 R13=ffff888014667380 R14=ffff888014667470 R15=ffff888014667338 RIP=ffffffff81131ca6 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 00007f2fbd526900 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=00007f1d39a47650 CR3=000000000ccc0000 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=84902a280e9242a500000000000ae988 XMM05=7462afb50e0ee8900000000000134a28 XMM06=dfcdbad4f1609c3700000000001338c0 XMM07=fb795ef6d65770560000000000123630 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000dead4ead RBX=ffffffff856d8220 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff856d8224 RBP=1ffff1100d9e13a7 RSP=ffff88806cf09d30 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000283 R13=ffffea0000373c00 R14=ffffffff8186b9c5 R15=ffff88800da92b00 RIP=ffffffff812e004a 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=00007ffdccfd3f28 CR3=0000000005482000 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=00007f6ec8a465100000564c9f0b9790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000