syzkaller login: [ 31.194402] BUG: Bad rss-counter state mm:00000000a2c08d7b type:MM_FILEPAGES val:33 [ 31.195893] BUG: Bad rss-counter state mm:00000000a2c08d7b type:MM_ANONPAGES val:22 [ 31.364198] ================================================================== [ 31.365132] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.366080] Read of size 8 at addr ffff888019fbaed8 by task sshd/220 [ 31.367001] [ 31.367223] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.368095] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.369101] Call Trace: [ 31.369423] [ 31.369706] dump_stack_lvl+0x91/0xf0 [ 31.370237] print_report+0xcc/0x620 [ 31.370728] ? __virt_addr_valid+0x102/0x340 [ 31.371293] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.371921] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.372549] kasan_report+0xbe/0xf0 [ 31.373044] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.373671] vma_interval_tree_remove+0xc75/0xec0 [ 31.374322] vma_prepare+0xc54/0x11a0 [ 31.374806] __split_vma+0x5af/0x950 [ 31.375302] ? __pfx___split_vma+0x10/0x10 [ 31.375835] ? find_held_lock+0x2c/0x110 [ 31.376380] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.376959] ? lock_is_held_type+0x9f/0x120 [ 31.377509] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.378143] ? mtree_range_walk+0x632/0x900 [ 31.378724] ? mas_walk+0x5c7/0x7c0 [ 31.379221] do_vmi_munmap+0x1f1/0x2b0 [ 31.379726] mmap_region+0x1f9/0x2660 [ 31.380219] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.380729] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.381460] ? __pfx_lock_acquire+0x10/0x10 [ 31.382017] ? __pfx_mmap_region+0x10/0x10 [ 31.382579] ? security_mmap_addr+0x7d/0xa0 [ 31.383125] ? get_unmapped_area+0x1f5/0x3f0 [ 31.383688] do_mmap+0x854/0xf00 [ 31.384142] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.384645] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.385225] ksys_mmap_pgoff+0x3af/0x500 [ 31.385744] do_syscall_64+0x3f/0x90 [ 31.386268] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.386943] RIP: 0033:0x7f3a2d47dd82 [ 31.387406] 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 [ 31.389575] RSP: 002b:00007ffc208eb9a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.390510] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3a2d47dd82 [ 31.391402] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3a2c8b7000 [ 31.392283] RBP: 00007f3a2c8b7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.393224] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561e308c6ec0 [ 31.394233] R13: 00007ffc208eb9c0 R14: 00007ffc208eb9f0 R15: 00007ffc208ebd50 [ 31.395128] [ 31.395422] [ 31.395646] Allocated by task 213: [ 31.396100] kasan_save_stack+0x22/0x50 [ 31.396616] kasan_set_track+0x25/0x30 [ 31.397122] __kasan_slab_alloc+0x59/0x70 [ 31.397660] kmem_cache_alloc+0x16b/0x370 [ 31.398198] vm_area_dup+0x20/0x160 [ 31.398666] __split_vma+0x170/0x950 [ 31.399155] split_vma+0xc6/0x110 [ 31.399604] mprotect_fixup+0x8d2/0xb30 [ 31.400123] do_mprotect_pkey+0x87e/0xd40 [ 31.400647] __x64_sys_mprotect+0x78/0xc0 [ 31.401185] do_syscall_64+0x3f/0x90 [ 31.401665] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.402334] [ 31.402553] Freed by task 213: [ 31.402970] kasan_save_stack+0x22/0x50 [ 31.403477] kasan_set_track+0x25/0x30 [ 31.403991] kasan_save_free_info+0x2b/0x50 [ 31.404522] __kasan_slab_free+0x10a/0x190 [ 31.405086] kmem_cache_free+0x10d/0x4d0 [ 31.405604] rcu_core+0x8c8/0x2860 [ 31.406067] __do_softirq+0x1b7/0x7d4 [ 31.406570] [ 31.406788] Last potentially related work creation: [ 31.407388] kasan_save_stack+0x22/0x50 [ 31.407908] __kasan_record_aux_stack+0x8e/0xa0 [ 31.408487] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.409151] remove_vma+0x139/0x170 [ 31.409605] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.410176] do_vmi_munmap+0x1f1/0x2b0 [ 31.410686] __vm_munmap+0x138/0x3a0 [ 31.411177] __x64_sys_munmap+0x59/0x80 [ 31.411679] do_syscall_64+0x3f/0x90 [ 31.412181] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.412835] [ 31.413077] The buggy address belongs to the object at ffff888019fbae80 [ 31.413077] which belongs to the cache vm_area_struct of size 168 [ 31.414873] The buggy address is located 88 bytes inside of [ 31.414873] freed 168-byte region [ffff888019fbae80, ffff888019fbaf28) [ 31.416683] [ 31.416965] The buggy address belongs to the physical page: [ 31.417750] page:000000004e2b9560 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19fba [ 31.418914] memcg:ffff8880165b9c01 [ 31.419346] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.420015] page_type: 0xffffffff() [ 31.420472] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.421429] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880165b9c01 [ 31.422370] page dumped because: kasan: bad access detected [ 31.423050] [ 31.423266] Memory state around the buggy address: [ 31.423858] ffff888019fbad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.424731] ffff888019fbae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.425620] >ffff888019fbae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.426507] ^ [ 31.427245] ffff888019fbaf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.428134] ffff888019fbaf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.429011] ================================================================== [ 31.430076] Disabling lock debugging due to kernel taint [ 33.421382] BUG: Bad rss-counter state mm:000000005874fa17 type:MM_FILEPAGES val:33 [ 33.422392] BUG: Bad rss-counter state mm:000000005874fa17 type:MM_ANONPAGES val:22 [ 33.915263] BUG: Bad rss-counter state mm:00000000c310770d type:MM_FILEPAGES val:33 [ 33.916518] BUG: Bad rss-counter state mm:00000000c310770d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48729' (ECDSA) to the list of known hosts. 2023/06/21 07:50:37 fuzzer started 2023/06/21 07:50:37 dialing manager at localhost:36067 2023/06/21 07:50:37 checking machine... 2023/06/21 07:50:37 checking revisions... [ 34.616242] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:50:37 testing simple program... [ 34.657168] cgroup: Unknown subsys name 'net' [ 34.714841] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:50:37 Registers: info registers vcpu 0 RAX=1ffff110037830f7 RBX=ffff88801bc18788 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88801bc187b8 RBP=ffff88801ae5e000 RSP=ffff88806ce09db8 R8 =0000000000000001 R9 =ffffed100d9c13ab R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88801bf1aca8 R14=ffffffff81162a75 R15=ffff88800e623000 RIP=ffffffff818464e2 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 00007f593d6b9900 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=00007ffc56ab5000 CR3=000000000b968000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=0000000000000001 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=00007fd70258e000 CR3=000000000d796000 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=5ef7f01eb3e88584864a0f2e852dbe3d XMM02=ec2efd57dc4c00df000000000011ae28 XMM03=fe241aa02234a9a3000000000011aef8 XMM04=94dd6a853da1017900000000000ae988 XMM05=19e9129bd510f2350000000000131ab8 XMM06=ccbd88a95bce77920000000000130920 XMM07=e042d86d42eb936e0000000000121ec0 XMM08=fe241aa02234a9a3000000000011aef8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000