syzkaller login: [ 30.369238] BUG: Bad rss-counter state mm:00000000d6173c6f type:MM_FILEPAGES val:33 [ 30.369903] BUG: Bad rss-counter state mm:00000000d6173c6f type:MM_ANONPAGES val:22 [ 30.538781] ================================================================== [ 30.539374] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.540023] Read of size 8 at addr ffff88801819c880 by task sshd/222 [ 30.540517] [ 30.540681] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.541239] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.542074] Call Trace: [ 30.542282] [ 30.542472] dump_stack_lvl+0x91/0xf0 [ 30.542797] print_report+0xcc/0x620 [ 30.543122] ? __virt_addr_valid+0x102/0x340 [ 30.543490] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.543900] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.544304] kasan_report+0xbe/0xf0 [ 30.544621] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.545082] vma_interval_tree_remove+0xc75/0xec0 [ 30.545501] vma_prepare+0xc54/0x11a0 [ 30.545849] __split_vma+0x5af/0x950 [ 30.546158] ? __pfx___split_vma+0x10/0x10 [ 30.546504] ? find_held_lock+0x2c/0x110 [ 30.546890] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.547261] ? lock_is_held_type+0x9f/0x120 [ 30.547619] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.548036] ? mtree_range_walk+0x632/0x900 [ 30.548389] ? mas_walk+0x5c7/0x7c0 [ 30.548719] do_vmi_munmap+0x1f1/0x2b0 [ 30.549058] mmap_region+0x1f9/0x2660 [ 30.549380] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.549722] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.550194] ? __pfx_lock_acquire+0x10/0x10 [ 30.550550] ? __pfx_mmap_region+0x10/0x10 [ 30.550933] ? security_mmap_addr+0x7d/0xa0 [ 30.551285] ? get_unmapped_area+0x1f5/0x3f0 [ 30.551645] do_mmap+0x854/0xf00 [ 30.551986] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.552314] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.552706] ksys_mmap_pgoff+0x3af/0x500 [ 30.553049] do_syscall_64+0x3f/0x90 [ 30.553890] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.554382] RIP: 0033:0x7f8a60537d82 [ 30.554688] 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 [ 30.556191] RSP: 002b:00007ffdad183948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.556788] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8a60537d82 [ 30.558162] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8a5f971000 [ 30.558721] RBP: 00007f8a5f971000 R08: 0000000000000009 R09: 0000000000001000 [ 30.559362] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b2b61f2ec0 [ 30.559934] R13: 00007ffdad183960 R14: 00007ffdad183990 R15: 00007ffdad183cf0 [ 30.560543] [ 30.560753] [ 30.560930] Allocated by task 213: [ 30.566122] kasan_save_stack+0x22/0x50 [ 30.566470] kasan_set_track+0x25/0x30 [ 30.566778] __kasan_slab_alloc+0x59/0x70 [ 30.567154] kmem_cache_alloc+0x16b/0x370 [ 30.567476] vm_area_dup+0x20/0x160 [ 30.567790] __split_vma+0x170/0x950 [ 30.568127] split_vma+0xc6/0x110 [ 30.568399] mprotect_fixup+0x8d2/0xb30 [ 30.568712] do_mprotect_pkey+0x87e/0xd40 [ 30.569139] __x64_sys_mprotect+0x78/0xc0 [ 30.569499] do_syscall_64+0x3f/0x90 [ 30.569797] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.570255] [ 30.570390] Freed by task 211: [ 30.570635] kasan_save_stack+0x22/0x50 [ 30.571023] kasan_set_track+0x25/0x30 [ 30.571330] kasan_save_free_info+0x2b/0x50 [ 30.571658] __kasan_slab_free+0x10a/0x190 [ 30.572083] kmem_cache_free+0x10d/0x4d0 [ 30.572400] rcu_core+0x8c8/0x2860 [ 30.572676] __do_softirq+0x1b7/0x7d4 [ 30.573023] [ 30.573160] Last potentially related work creation: [ 30.574298] kasan_save_stack+0x22/0x50 [ 30.574610] __kasan_record_aux_stack+0x8e/0xa0 [ 30.575023] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.575427] remove_vma+0x139/0x170 [ 30.575710] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.576119] do_vmi_munmap+0x1f1/0x2b0 [ 30.576420] __vm_munmap+0x138/0x3a0 [ 30.576707] __x64_sys_munmap+0x59/0x80 [ 30.577115] do_syscall_64+0x3f/0x90 [ 30.577433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.577849] [ 30.578035] The buggy address belongs to the object at ffff88801819c828 [ 30.578035] which belongs to the cache vm_area_struct of size 168 [ 30.579014] The buggy address is located 88 bytes inside of [ 30.579014] freed 168-byte region [ffff88801819c828, ffff88801819c8d0) [ 30.579913] [ 30.580105] The buggy address belongs to the physical page: [ 30.580512] page:00000000a3fad9d0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1819c [ 30.581237] memcg:ffff88800c544e01 [ 30.581534] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.582049] page_type: 0xffffffff() [ 30.582329] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 30.582930] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c544e01 [ 30.583538] page dumped because: kasan: bad access detected [ 30.583947] [ 30.584127] Memory state around the buggy address: [ 30.584482] ffff88801819c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.585104] ffff88801819c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.589837] >ffff88801819c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.590411] ^ [ 30.590665] ffff88801819c900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.591285] ffff88801819c980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 30.591830] ================================================================== [ 30.617385] Disabling lock debugging due to kernel taint [ 33.261856] BUG: Bad rss-counter state mm:0000000073a4872b type:MM_FILEPAGES val:33 [ 33.262905] BUG: Bad rss-counter state mm:0000000073a4872b type:MM_ANONPAGES val:22 [ 33.957220] BUG: Bad rss-counter state mm:00000000b26ce7f1 type:MM_FILEPAGES val:33 [ 33.958579] BUG: Bad rss-counter state mm:00000000b26ce7f1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47968' (ECDSA) to the list of known hosts. 2023/06/20 10:00:10 fuzzer started 2023/06/20 10:00:11 dialing manager at localhost:44161 2023/06/20 10:00:11 checking machine... 2023/06/20 10:00:11 checking revisions... [ 34.817400] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:00:11 testing simple program... [ 34.903253] cgroup: Unknown subsys name 'net' [ 34.980024] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:00:10 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f64daf05328 CR3=0000000005482000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007ff8e40dd800 CR3=00000000140d2000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=9b282cabb1d7965d0000000000135118 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=8162fea3c11f04eb00000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000