syzkaller login: [ 41.417069] BUG: Bad rss-counter state mm:000000007f6cee93 type:MM_FILEPAGES val:33 [ 41.418235] BUG: Bad rss-counter state mm:000000007f6cee93 type:MM_ANONPAGES val:22 [ 41.543261] ================================================================== [ 41.543967] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.544724] Read of size 8 at addr ffff88801a2943f8 by task sshd/220 [ 41.545308] [ 41.545450] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.546021] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.546686] Call Trace: [ 41.546894] [ 41.547091] dump_stack_lvl+0x91/0xf0 [ 41.547620] print_report+0xcc/0x620 [ 41.548001] ? __virt_addr_valid+0x102/0x340 [ 41.548369] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.548762] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.549203] kasan_report+0xbe/0xf0 [ 41.549518] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.549943] vma_interval_tree_remove+0xc75/0xec0 [ 41.550361] vma_prepare+0xc54/0x11a0 [ 41.550673] __split_vma+0x5af/0x950 [ 41.550979] ? __pfx___split_vma+0x10/0x10 [ 41.551329] ? find_held_lock+0x2c/0x110 [ 41.551694] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.552100] ? lock_is_held_type+0x9f/0x120 [ 41.552459] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.552890] ? mtree_range_walk+0x632/0x900 [ 41.553360] ? mas_walk+0x5c7/0x7c0 [ 41.553710] do_vmi_munmap+0x1f1/0x2b0 [ 41.554056] mmap_region+0x1f9/0x2660 [ 41.554409] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.554751] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.555218] ? __pfx_lock_acquire+0x10/0x10 [ 41.555589] ? __pfx_mmap_region+0x10/0x10 [ 41.555932] ? security_mmap_addr+0x7d/0xa0 [ 41.556283] ? get_unmapped_area+0x1f5/0x3f0 [ 41.556672] do_mmap+0x854/0xf00 [ 41.557037] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.557370] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.557745] ksys_mmap_pgoff+0x3af/0x500 [ 41.558088] do_syscall_64+0x3f/0x90 [ 41.558412] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.558846] RIP: 0033:0x7f56be767d82 [ 41.559164] 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 [ 41.560605] RSP: 002b:00007ffea9b39518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.561258] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f56be767d82 [ 41.561844] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f56bdba1000 [ 41.562435] RBP: 00007f56bdba1000 R08: 0000000000000009 R09: 0000000000001000 [ 41.563030] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e3199d0f70 [ 41.563701] R13: 00007ffea9b39530 R14: 00007ffea9b39560 R15: 00007ffea9b398c0 [ 41.564284] [ 41.564480] [ 41.564628] Allocated by task 213: [ 41.564996] kasan_save_stack+0x22/0x50 [ 41.565363] kasan_set_track+0x25/0x30 [ 41.565737] __kasan_slab_alloc+0x59/0x70 [ 41.566098] kmem_cache_alloc+0x16b/0x370 [ 41.566430] vm_area_dup+0x20/0x160 [ 41.566753] __split_vma+0x170/0x950 [ 41.567081] split_vma+0xc6/0x110 [ 41.567401] mprotect_fixup+0x8d2/0xb30 [ 41.567761] do_mprotect_pkey+0x87e/0xd40 [ 41.568097] __x64_sys_mprotect+0x78/0xc0 [ 41.568481] do_syscall_64+0x3f/0x90 [ 41.568852] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.569358] [ 41.569518] Freed by task 213: [ 41.569784] kasan_save_stack+0x22/0x50 [ 41.570108] kasan_set_track+0x25/0x30 [ 41.570443] kasan_save_free_info+0x2b/0x50 [ 41.570852] __kasan_slab_free+0x10a/0x190 [ 41.571185] kmem_cache_free+0x10d/0x4d0 [ 41.571534] rcu_core+0x8c8/0x2860 [ 41.571851] __do_softirq+0x1b7/0x7d4 [ 41.572180] [ 41.572330] Last potentially related work creation: [ 41.572740] kasan_save_stack+0x22/0x50 [ 41.573127] __kasan_record_aux_stack+0x8e/0xa0 [ 41.573501] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.573916] remove_vma+0x139/0x170 [ 41.574221] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.574579] do_vmi_munmap+0x1f1/0x2b0 [ 41.574900] __vm_munmap+0x138/0x3a0 [ 41.575214] __x64_sys_munmap+0x59/0x80 [ 41.575539] do_syscall_64+0x3f/0x90 [ 41.575853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.576252] [ 41.576394] The buggy address belongs to the object at ffff88801a2943a0 [ 41.576394] which belongs to the cache vm_area_struct of size 168 [ 41.577445] The buggy address is located 88 bytes inside of [ 41.577445] freed 168-byte region [ffff88801a2943a0, ffff88801a294448) [ 41.578393] [ 41.578539] The buggy address belongs to the physical page: [ 41.578989] page:00000000ff9591fa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a294 [ 41.579744] memcg:ffff888019eb6201 [ 41.580047] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.580545] page_type: 0xffffffff() [ 41.580860] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.581503] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019eb6201 [ 41.582086] page dumped because: kasan: bad access detected [ 41.582518] [ 41.582661] Memory state around the buggy address: [ 41.583053] ffff88801a294280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 41.583623] ffff88801a294300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 41.584179] >ffff88801a294380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 41.584759] ^ [ 41.585401] ffff88801a294400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 41.585955] ffff88801a294480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.586513] ================================================================== [ 41.587178] Disabling lock debugging due to kernel taint [ 43.042742] BUG: Bad rss-counter state mm:00000000141a7ab5 type:MM_FILEPAGES val:33 [ 43.043775] BUG: Bad rss-counter state mm:00000000141a7ab5 type:MM_ANONPAGES val:22 [ 43.417353] BUG: Bad rss-counter state mm:0000000093188eb7 type:MM_FILEPAGES val:33 [ 43.418034] BUG: Bad rss-counter state mm:0000000093188eb7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15087' (ECDSA) to the list of known hosts. 2023/06/20 08:33:42 fuzzer started 2023/06/20 08:33:42 dialing manager at localhost:44161 2023/06/20 08:33:42 checking machine... 2023/06/20 08:33:42 checking revisions... [ 44.017633] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:33:42 testing simple program... [ 44.060531] cgroup: Unknown subsys name 'net' [ 44.099745] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:33:31 Registers: info registers vcpu 0 RAX=00000000ffffffff RBX=0000000000000000 RCX=0000000000000000 RDX=00000000f0000000 RSI=ffffea000076b3c0 RDI=ffffea000076b3f0 RBP=ffffea000076b380 RSP=ffff88806ce09c40 R8 =0000000000000000 R9 =ffff88807ffdc600 R10=ffffea000076b3b0 R11=000000000001dace R12=0000000000000000 R13=ffffea000076b3c0 R14=000000000001dacf R15=ffff88807ffdc500 RIP=ffffffff81789642 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 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=00007fa407830b80 CR3=000000000e492000 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=2031343a33333a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a33333a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff8173f6ef RDX=0000000000000001 RSI=ffffffff86127c80 RDI=ffffffff85df244c RBP=ffff88801ca2f730 RSP=ffff88801ca2f620 R8 =ffffffff86127c80 R9 =ffff88801ca2f718 R10=0000000000038001 R11=000000000001e41e R12=ffffffff85df244c R13=ffffffff85df244c R14=ffff88801ca2f719 R15=dffffc0000000000 RIP=ffffffff8112fc43 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 00007f6a38294900 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=00007f6a38273020 CR3=0000000013706000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000