syzkaller login: [ 35.130539] BUG: Bad rss-counter state mm:000000000f56709b type:MM_FILEPAGES val:33 [ 35.131238] BUG: Bad rss-counter state mm:000000000f56709b type:MM_ANONPAGES val:22 [ 35.290686] ================================================================== [ 35.291693] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.292732] Read of size 8 at addr ffff88800dce3a50 by task sshd/224 [ 35.293714] [ 35.293979] CPU: 1 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.294813] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.295931] Call Trace: [ 35.296243] [ 35.296516] dump_stack_lvl+0x91/0xf0 [ 35.297010] print_report+0xcc/0x620 [ 35.297480] ? __virt_addr_valid+0x102/0x340 [ 35.298043] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.298649] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.299272] kasan_report+0xbe/0xf0 [ 35.299766] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.300366] vma_interval_tree_remove+0xc75/0xec0 [ 35.300980] vma_prepare+0xc54/0x11a0 [ 35.301573] __split_vma+0x5af/0x950 [ 35.302072] ? __pfx___split_vma+0x10/0x10 [ 35.302574] ? find_held_lock+0x2c/0x110 [ 35.303062] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.303603] ? lock_is_held_type+0x9f/0x120 [ 35.304113] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.304703] ? mtree_range_walk+0x632/0x900 [ 35.305301] ? mas_walk+0x5c7/0x7c0 [ 35.305828] do_vmi_munmap+0x1f1/0x2b0 [ 35.306360] mmap_region+0x1f9/0x2660 [ 35.306846] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.307418] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.308207] ? __pfx_lock_acquire+0x10/0x10 [ 35.308773] ? __pfx_mmap_region+0x10/0x10 [ 35.309367] ? security_mmap_addr+0x7d/0xa0 [ 35.309934] ? get_unmapped_area+0x1f5/0x3f0 [ 35.310515] do_mmap+0x854/0xf00 [ 35.310962] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.311569] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.312231] ksys_mmap_pgoff+0x3af/0x500 [ 35.312839] do_syscall_64+0x3f/0x90 [ 35.313401] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.314163] RIP: 0033:0x7f7d93519d82 [ 35.314704] 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 [ 35.317127] RSP: 002b:00007fff41249fd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.318120] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7d93519d82 [ 35.319116] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7d92953000 [ 35.320168] RBP: 00007f7d92953000 R08: 0000000000000009 R09: 0000000000001000 [ 35.321194] R10: 0000000000000812 R11: 0000000000000206 R12: 00005644f7b19980 [ 35.322205] R13: 00007fff41249ff0 R14: 00007fff4124a020 R15: 00007fff4124a380 [ 35.323270] [ 35.323634] [ 35.323893] Allocated by task 216: [ 35.324373] kasan_save_stack+0x22/0x50 [ 35.324901] kasan_set_track+0x25/0x30 [ 35.325414] __kasan_slab_alloc+0x59/0x70 [ 35.325937] kmem_cache_alloc+0x16b/0x370 [ 35.326430] vm_area_dup+0x20/0x160 [ 35.326826] __split_vma+0x170/0x950 [ 35.327230] split_vma+0xc6/0x110 [ 35.327604] mprotect_fixup+0x8d2/0xb30 [ 35.328029] do_mprotect_pkey+0x87e/0xd40 [ 35.328463] __x64_sys_mprotect+0x78/0xc0 [ 35.328967] do_syscall_64+0x3f/0x90 [ 35.329424] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.330052] [ 35.330269] Freed by task 19: [ 35.330635] kasan_save_stack+0x22/0x50 [ 35.331103] kasan_set_track+0x25/0x30 [ 35.331607] kasan_save_free_info+0x2b/0x50 [ 35.332143] __kasan_slab_free+0x10a/0x190 [ 35.332658] kmem_cache_free+0x10d/0x4d0 [ 35.333149] rcu_core+0x8c8/0x2860 [ 35.333594] __do_softirq+0x1b7/0x7d4 [ 35.334064] [ 35.334276] Last potentially related work creation: [ 35.334835] kasan_save_stack+0x22/0x50 [ 35.335329] __kasan_record_aux_stack+0x8e/0xa0 [ 35.335845] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.336381] remove_vma+0x139/0x170 [ 35.336755] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.337214] do_vmi_munmap+0x1f1/0x2b0 [ 35.337621] __vm_munmap+0x138/0x3a0 [ 35.338008] __x64_sys_munmap+0x59/0x80 [ 35.338429] do_syscall_64+0x3f/0x90 [ 35.338822] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.339398] [ 35.339579] Second to last potentially related work creation: [ 35.340137] kasan_save_stack+0x22/0x50 [ 35.340553] __kasan_record_aux_stack+0x8e/0xa0 [ 35.341028] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.341558] remove_vma+0x139/0x170 [ 35.341932] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.342409] do_vmi_munmap+0x1f1/0x2b0 [ 35.342810] mmap_region+0x1f9/0x2660 [ 35.343232] do_mmap+0x854/0xf00 [ 35.343605] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.344021] ksys_mmap_pgoff+0x3af/0x500 [ 35.344450] do_syscall_64+0x3f/0x90 [ 35.344872] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.345433] [ 35.345619] The buggy address belongs to the object at ffff88800dce39f8 [ 35.345619] which belongs to the cache vm_area_struct of size 168 [ 35.346874] The buggy address is located 88 bytes inside of [ 35.346874] freed 168-byte region [ffff88800dce39f8, ffff88800dce3aa0) [ 35.348103] [ 35.348293] The buggy address belongs to the physical page: [ 35.348848] page:000000009ebcbf76 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdce3 [ 35.349790] memcg:ffff88800ddd7f01 [ 35.350141] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.350680] page_type: 0xffffffff() [ 35.351054] raw: 0100000000000200 ffff8880087a0c80 ffffea000059c600 dead000000000004 [ 35.351859] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddd7f01 [ 35.352630] page dumped because: kasan: bad access detected [ 35.353230] [ 35.353428] Memory state around the buggy address: [ 35.353939] ffff88800dce3900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.354745] ffff88800dce3980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 35.355556] >ffff88800dce3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.356379] ^ [ 35.357072] ffff88800dce3a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 35.357906] ffff88800dce3b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.358691] ================================================================== [ 35.360070] Disabling lock debugging due to kernel taint [ 36.985990] BUG: Bad rss-counter state mm:00000000604235d4 type:MM_FILEPAGES val:33 [ 36.986615] BUG: Bad rss-counter state mm:00000000604235d4 type:MM_ANONPAGES val:22 [ 37.344356] BUG: Bad rss-counter state mm:000000005309962a type:MM_FILEPAGES val:33 [ 37.345053] BUG: Bad rss-counter state mm:000000005309962a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23984' (ECDSA) to the list of known hosts. 2023/06/21 00:07:37 fuzzer started 2023/06/21 00:07:41 dialing manager at localhost:36067 2023/06/21 00:07:41 checking machine... 2023/06/21 00:07:41 checking revisions... [ 41.948265] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:07:41 testing simple program... [ 41.998525] cgroup: Unknown subsys name 'net' [ 42.068893] cgroup: Unknown subsys name 'rlimit' executing program VM DIAGNOSIS: 00:07:37 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=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=00007fa254cd6590 CR3=000000000eb18000 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=2037333a37303a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a37303a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000000e RBX=000055898a8113a0 RCX=0000000000000000 RDX=0000000000000002 RSI=00007fff4083d050 RDI=000055898a811240 RBP=00007fff4083d150 RSP=00007fff4083cec0 R8 =000055898a811230 R9 =0000000000000000 R10=0000000000000003 R11=0000000200000000 R12=0000000000000023 R13=0000000000000023 R14=0000000000000020 R15=0000000000000000 RIP=00007f1ec1c80d66 RFL=00000206 [-----P-] 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 00007f1ec10f5900 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=00007f1ec10d4020 CR3=000000000f086000 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