syzkaller login: [ 38.736671] BUG: Bad rss-counter state mm:00000000cb3b1414 type:MM_FILEPAGES val:33 [ 38.738457] BUG: Bad rss-counter state mm:00000000cb3b1414 type:MM_ANONPAGES val:22 [ 38.894262] ================================================================== [ 38.895216] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.896196] Read of size 8 at addr ffff88801a062968 by task sshd/231 [ 38.896972] [ 38.897262] CPU: 0 PID: 231 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.898145] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.899132] Call Trace: [ 38.899645] [ 38.899947] dump_stack_lvl+0x91/0xf0 [ 38.900459] print_report+0xcc/0x620 [ 38.900949] ? __virt_addr_valid+0x102/0x340 [ 38.901512] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.902145] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.902773] kasan_report+0xbe/0xf0 [ 38.903249] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.903896] vma_interval_tree_remove+0xc75/0xec0 [ 38.904520] vma_prepare+0xc54/0x11a0 [ 38.905007] __split_vma+0x5af/0x950 [ 38.905494] ? __pfx___split_vma+0x10/0x10 [ 38.906025] ? find_held_lock+0x2c/0x110 [ 38.906547] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.907115] ? lock_is_held_type+0x9f/0x120 [ 38.907685] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.908293] ? mtree_range_walk+0x632/0x900 [ 38.908851] ? mas_walk+0x5c7/0x7c0 [ 38.909331] do_vmi_munmap+0x1f1/0x2b0 [ 38.909830] mmap_region+0x1f9/0x2660 [ 38.910323] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.910845] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.911581] ? __pfx_lock_acquire+0x10/0x10 [ 38.912112] ? __pfx_mmap_region+0x10/0x10 [ 38.912649] ? security_mmap_addr+0x7d/0xa0 [ 38.913179] ? get_unmapped_area+0x1f5/0x3f0 [ 38.913739] do_mmap+0x854/0xf00 [ 38.914180] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.914681] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.915250] ksys_mmap_pgoff+0x3af/0x500 [ 38.915772] do_syscall_64+0x3f/0x90 [ 38.916256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.916909] RIP: 0033:0x7f8a3f406d82 [ 38.917386] 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 [ 38.919529] RSP: 002b:00007ffc2e488738 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.920428] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8a3f406d82 [ 38.921277] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8a3e840000 [ 38.922127] RBP: 00007f8a3e840000 R08: 0000000000000009 R09: 0000000000001000 [ 38.922974] R10: 0000000000000812 R11: 0000000000000206 R12: 00005615f0bcaec0 [ 38.923838] R13: 00007ffc2e488750 R14: 00007ffc2e488780 R15: 00007ffc2e488ae0 [ 38.924708] [ 38.925006] [ 38.925224] Allocated by task 224: [ 38.925649] kasan_save_stack+0x22/0x50 [ 38.926157] kasan_set_track+0x25/0x30 [ 38.926651] __kasan_slab_alloc+0x59/0x70 [ 38.927174] kmem_cache_alloc+0x16b/0x370 [ 38.927714] vm_area_dup+0x20/0x160 [ 38.928174] __split_vma+0x170/0x950 [ 38.928641] split_vma+0xc6/0x110 [ 38.929085] mprotect_fixup+0x8d2/0xb30 [ 38.929591] do_mprotect_pkey+0x87e/0xd40 [ 38.930116] __x64_sys_mprotect+0x78/0xc0 [ 38.930636] do_syscall_64+0x3f/0x90 [ 38.931112] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.931777] [ 38.931996] Freed by task 224: [ 38.932411] kasan_save_stack+0x22/0x50 [ 38.932942] kasan_set_track+0x25/0x30 [ 38.933441] kasan_save_free_info+0x2b/0x50 [ 38.933999] __kasan_slab_free+0x10a/0x190 [ 38.934540] kmem_cache_free+0x10d/0x4d0 [ 38.935053] rcu_core+0x8c8/0x2860 [ 38.935524] __do_softirq+0x1b7/0x7d4 [ 38.936020] [ 38.936240] Last potentially related work creation: [ 38.936835] kasan_save_stack+0x22/0x50 [ 38.937357] __kasan_record_aux_stack+0x8e/0xa0 [ 38.937939] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.938594] remove_vma+0x139/0x170 [ 38.939048] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.939626] do_vmi_munmap+0x1f1/0x2b0 [ 38.940121] __vm_munmap+0x138/0x3a0 [ 38.940595] __x64_sys_munmap+0x59/0x80 [ 38.941095] do_syscall_64+0x3f/0x90 [ 38.941572] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.942227] [ 38.942451] The buggy address belongs to the object at ffff88801a062910 [ 38.942451] which belongs to the cache vm_area_struct of size 168 [ 38.943951] The buggy address is located 88 bytes inside of [ 38.943951] freed 168-byte region [ffff88801a062910, ffff88801a0629b8) [ 38.945357] [ 38.945576] The buggy address belongs to the physical page: [ 38.946239] page:00000000323c41c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a062 [ 38.947348] memcg:ffff88800df62d01 [ 38.947775] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.948424] page_type: 0xffffffff() [ 38.948877] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.949795] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df62d01 [ 38.950705] page dumped because: kasan: bad access detected [ 38.951374] [ 38.951593] Memory state around the buggy address: [ 38.952174] ffff88801a062800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.953044] ffff88801a062880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.953909] >ffff88801a062900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.954775] ^ [ 38.955601] ffff88801a062980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 38.956467] ffff88801a062a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.957328] ================================================================== [ 38.958832] Disabling lock debugging due to kernel taint [ 40.887110] BUG: Bad rss-counter state mm:0000000047082ede type:MM_FILEPAGES val:33 [ 40.888076] BUG: Bad rss-counter state mm:0000000047082ede type:MM_ANONPAGES val:22 [ 41.394124] BUG: Bad rss-counter state mm:0000000003eed24d type:MM_FILEPAGES val:33 [ 41.395169] BUG: Bad rss-counter state mm:0000000003eed24d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2014' (ECDSA) to the list of known hosts. 2023/06/20 13:35:50 fuzzer started 2023/06/20 13:35:50 dialing manager at localhost:36067 2023/06/20 13:35:50 checking machine... 2023/06/20 13:35:50 checking revisions... [ 42.113367] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:35:50 testing simple program... [ 42.157759] cgroup: Unknown subsys name 'net' [ 42.200049] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:35:50 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007ffe3d67b778 CR3=000000000e314000 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=2030353a35333a3331203032206e754a XMM01=657463656e6e6f63736944203a5d3034 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3034325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a35333a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000029 RBX=000055b05eaeaf70 RCX=0000000000000019 RDX=00000000000001d0 RSI=000000000000000a RDI=000055b05eafa240 RBP=00007fffe5a598a0 RSP=00007fffe5a59840 R8 =000055b05eafa227 R9 =00007f350eb69be0 R10=0000000000000100 R11=0000000000000246 R12=00007f350e5b7900 R13=000055b05eafa24f R14=0000000000000029 R15=0000000000000000 RIP=00007f350ea20823 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f350e5b7900 00000000 00000000 GS =0000 0000000000000000 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=00007fffe5a54000 CR3=000000001c9e8000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=20666f207473696c20646574696d696c XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00ffffffffffffffffffffffffffffff XMM08=6f632f6374652f09454c4f534e4f4323 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000