syzkaller login: [ 38.742616] BUG: Bad rss-counter state mm:00000000eff11af6 type:MM_FILEPAGES val:33 [ 38.743872] BUG: Bad rss-counter state mm:00000000eff11af6 type:MM_ANONPAGES val:22 [ 38.891382] ================================================================== [ 38.892324] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.893243] Read of size 8 at addr ffff88800e5aded8 by task sshd/220 [ 38.894015] [ 38.894237] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.895237] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.896239] Call Trace: [ 38.896553] [ 38.896850] dump_stack_lvl+0x91/0xf0 [ 38.897352] print_report+0xcc/0x620 [ 38.897832] ? __virt_addr_valid+0x102/0x340 [ 38.898389] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.899001] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.899622] kasan_report+0xbe/0xf0 [ 38.900124] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.900746] vma_interval_tree_remove+0xc75/0xec0 [ 38.901355] vma_prepare+0xc54/0x11a0 [ 38.901837] __split_vma+0x5af/0x950 [ 38.902310] ? __pfx___split_vma+0x10/0x10 [ 38.902841] ? find_held_lock+0x2c/0x110 [ 38.903364] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.903943] ? lock_is_held_type+0x9f/0x120 [ 38.904490] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.905103] ? mtree_range_walk+0x632/0x900 [ 38.905654] ? mas_walk+0x5c7/0x7c0 [ 38.906131] do_vmi_munmap+0x1f1/0x2b0 [ 38.906625] mmap_region+0x1f9/0x2660 [ 38.907107] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.907625] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.908361] ? __pfx_lock_acquire+0x10/0x10 [ 38.908906] ? __pfx_mmap_region+0x10/0x10 [ 38.909430] ? security_mmap_addr+0x7d/0xa0 [ 38.909958] ? get_unmapped_area+0x1f5/0x3f0 [ 38.910506] do_mmap+0x854/0xf00 [ 38.910955] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.911448] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.912026] ksys_mmap_pgoff+0x3af/0x500 [ 38.912530] do_syscall_64+0x3f/0x90 [ 38.913007] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.913654] RIP: 0033:0x7f7c541a4d82 [ 38.914119] 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 [ 38.916283] RSP: 002b:00007ffead8d6c48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.917177] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7c541a4d82 [ 38.918024] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7c535de000 [ 38.918878] RBP: 00007f7c535de000 R08: 0000000000000009 R09: 0000000000001000 [ 38.919722] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f7426f3b20 [ 38.920588] R13: 00007ffead8d6c60 R14: 00007ffead8d6c90 R15: 00007ffead8d6ff0 [ 38.921455] [ 38.921746] [ 38.921960] Allocated by task 213: [ 38.922393] kasan_save_stack+0x22/0x50 [ 38.922901] kasan_set_track+0x25/0x30 [ 38.923391] __kasan_slab_alloc+0x59/0x70 [ 38.923922] kmem_cache_alloc+0x16b/0x370 [ 38.924437] vm_area_dup+0x20/0x160 [ 38.924893] __split_vma+0x170/0x950 [ 38.925358] split_vma+0xc6/0x110 [ 38.925799] mprotect_fixup+0x8d2/0xb30 [ 38.926310] do_mprotect_pkey+0x87e/0xd40 [ 38.926832] __x64_sys_mprotect+0x78/0xc0 [ 38.927353] do_syscall_64+0x3f/0x90 [ 38.927854] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.928492] [ 38.928711] Freed by task 13: [ 38.929091] kasan_save_stack+0x22/0x50 [ 38.929597] kasan_set_track+0x25/0x30 [ 38.930093] kasan_save_free_info+0x2b/0x50 [ 38.930631] __kasan_slab_free+0x10a/0x190 [ 38.931167] kmem_cache_free+0x10d/0x4d0 [ 38.931681] rcu_core+0x8c8/0x2860 [ 38.932139] __do_softirq+0x1b7/0x7d4 [ 38.932623] [ 38.932843] Last potentially related work creation: [ 38.933429] kasan_save_stack+0x22/0x50 [ 38.933933] __kasan_record_aux_stack+0x8e/0xa0 [ 38.934509] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.935154] remove_vma+0x139/0x170 [ 38.935684] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.936273] do_vmi_munmap+0x1f1/0x2b0 [ 38.936753] __vm_munmap+0x138/0x3a0 [ 38.937220] __x64_sys_munmap+0x59/0x80 [ 38.937719] do_syscall_64+0x3f/0x90 [ 38.938190] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.938829] [ 38.939045] Second to last potentially related work creation: [ 38.939723] kasan_save_stack+0x22/0x50 [ 38.940245] __kasan_record_aux_stack+0x8e/0xa0 [ 38.940818] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.941457] remove_vma+0x139/0x170 [ 38.941907] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.942476] do_vmi_munmap+0x1f1/0x2b0 [ 38.942960] mmap_region+0x1f9/0x2660 [ 38.943438] do_mmap+0x854/0xf00 [ 38.943876] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.944365] ksys_mmap_pgoff+0x3af/0x500 [ 38.944861] do_syscall_64+0x3f/0x90 [ 38.945337] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.945977] [ 38.946194] The buggy address belongs to the object at ffff88800e5ade80 [ 38.946194] which belongs to the cache vm_area_struct of size 168 [ 38.947657] The buggy address is located 88 bytes inside of [ 38.947657] freed 168-byte region [ffff88800e5ade80, ffff88800e5adf28) [ 38.949064] [ 38.949285] The buggy address belongs to the physical page: [ 38.949938] page:0000000025d923a1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5ad [ 38.951011] memcg:ffff88800dc17e01 [ 38.951435] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.952087] page_type: 0xffffffff() [ 38.952535] raw: 0100000000000200 ffff8880087a0c80 ffffea00003f3640 dead000000000004 [ 38.953448] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc17e01 [ 38.954345] page dumped because: kasan: bad access detected [ 38.954998] [ 38.955217] Memory state around the buggy address: [ 38.955797] ffff88800e5add80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.956646] ffff88800e5ade00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.957491] >ffff88800e5ade80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.958337] ^ [ 38.959058] ffff88800e5adf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 38.959919] ffff88800e5adf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.960762] ================================================================== [ 38.961766] Disabling lock debugging due to kernel taint [ 41.447207] BUG: Bad rss-counter state mm:0000000023681596 type:MM_FILEPAGES val:33 [ 41.448245] BUG: Bad rss-counter state mm:0000000023681596 type:MM_ANONPAGES val:22 [ 41.958676] BUG: Bad rss-counter state mm:000000007e90ba0d type:MM_FILEPAGES val:33 [ 41.959849] BUG: Bad rss-counter state mm:000000007e90ba0d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45148' (ECDSA) to the list of known hosts. 2023/06/21 07:11:46 fuzzer started 2023/06/21 07:11:46 dialing manager at localhost:36067 2023/06/21 07:11:46 checking machine... 2023/06/21 07:11:46 checking revisions... [ 42.590695] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:11:46 testing simple program... [ 42.640802] cgroup: Unknown subsys name 'net' [ 42.678722] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:11:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000055606c01ad00 RCX=000000000000000a RDX=0000000000000f76 RSI=000000000000000a RDI=000055606c028cca RBP=00007fff57c23970 RSP=00007fff57c23908 R8 =000055606c028cca R9 =00007f1ab7764be0 R10=000000000000006f R11=0000000000000246 R12=00007f1ab71b2900 R13=00007fff57c23978 R14=0000000000000f96 R15=0000000000000000 RIP=00007f1ab7701986 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 00007f1ab71b2900 00000000 00000000 GS =0000 0000000000000000 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=00007f1ab7767650 CR3=000000000dc84000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=00000000000000000000000000000000 XMM02=00000000000000000000000000ffff00 XMM03=6300003030363009094d524550595454 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000000000000000ffffffffffffff XMM08=72756769666e6f63206e69676f000023 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 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=ffff888008c04400 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=00007fff9a2f4ad8 CR3=0000000015d6a000 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=2036343a31313a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a31313a3730203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000