syzkaller login: [ 30.730585] BUG: Bad rss-counter state mm:000000003362695c type:MM_FILEPAGES val:33 [ 30.731862] BUG: Bad rss-counter state mm:000000003362695c type:MM_ANONPAGES val:22 [ 30.895362] ================================================================== [ 30.896288] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.897235] Read of size 8 at addr ffff88800dca44e0 by task sshd/221 [ 30.898234] [ 30.898453] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.899340] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.900359] Call Trace: [ 30.900699] [ 30.900986] dump_stack_lvl+0x91/0xf0 [ 30.901492] print_report+0xcc/0x620 [ 30.901993] ? __virt_addr_valid+0x102/0x340 [ 30.902548] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.903180] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.903828] kasan_report+0xbe/0xf0 [ 30.904312] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.904951] vma_interval_tree_remove+0xc75/0xec0 [ 30.905620] vma_prepare+0xc54/0x11a0 [ 30.906142] __split_vma+0x5af/0x950 [ 30.906642] ? __pfx___split_vma+0x10/0x10 [ 30.907215] ? find_held_lock+0x2c/0x110 [ 30.907774] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.908369] ? lock_is_held_type+0x9f/0x120 [ 30.908969] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.909625] ? mtree_range_walk+0x632/0x900 [ 30.910227] ? mas_walk+0x5c7/0x7c0 [ 30.910740] do_vmi_munmap+0x1f1/0x2b0 [ 30.911265] mmap_region+0x1f9/0x2660 [ 30.911817] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.912525] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.913555] ? __pfx_lock_acquire+0x10/0x10 [ 30.914315] ? __pfx_mmap_region+0x10/0x10 [ 30.915057] ? security_mmap_addr+0x7d/0xa0 [ 30.915798] ? get_unmapped_area+0x1f5/0x3f0 [ 30.916566] do_mmap+0x854/0xf00 [ 30.917152] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.917724] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.918318] ksys_mmap_pgoff+0x3af/0x500 [ 30.918861] do_syscall_64+0x3f/0x90 [ 30.919368] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.920068] RIP: 0033:0x7f9c526edd82 [ 30.920551] 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 [ 30.922867] RSP: 002b:00007ffecadb96d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.923851] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9c526edd82 [ 30.924778] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9c51b27000 [ 30.925694] RBP: 00007f9c51b27000 R08: 0000000000000009 R09: 0000000000001000 [ 30.926597] R10: 0000000000000812 R11: 0000000000000206 R12: 00005617db8eef70 [ 30.927513] R13: 00007ffecadb96f0 R14: 00007ffecadb9720 R15: 00007ffecadb9a80 [ 30.928425] [ 30.928759] [ 30.928986] Allocated by task 214: [ 30.929461] kasan_save_stack+0x22/0x50 [ 30.930023] kasan_set_track+0x25/0x30 [ 30.930541] __kasan_slab_alloc+0x59/0x70 [ 30.931103] kmem_cache_alloc+0x16b/0x370 [ 30.931650] vm_area_dup+0x20/0x160 [ 30.932132] __split_vma+0x170/0x950 [ 30.932623] split_vma+0xc6/0x110 [ 30.933100] mprotect_fixup+0x8d2/0xb30 [ 30.933661] do_mprotect_pkey+0x87e/0xd40 [ 30.934242] __x64_sys_mprotect+0x78/0xc0 [ 30.934813] do_syscall_64+0x3f/0x90 [ 30.935316] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.936014] [ 30.936243] Freed by task 214: [ 30.936667] kasan_save_stack+0x22/0x50 [ 30.937202] kasan_set_track+0x25/0x30 [ 30.937777] kasan_save_free_info+0x2b/0x50 [ 30.938330] __kasan_slab_free+0x10a/0x190 [ 30.938904] kmem_cache_free+0x10d/0x4d0 [ 30.939438] rcu_core+0x8c8/0x2860 [ 30.939913] __do_softirq+0x1b7/0x7d4 [ 30.940412] [ 30.940641] Last potentially related work creation: [ 30.941286] kasan_save_stack+0x22/0x50 [ 30.941844] __kasan_record_aux_stack+0x8e/0xa0 [ 30.942444] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.943139] remove_vma+0x139/0x170 [ 30.943605] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.944204] do_vmi_munmap+0x1f1/0x2b0 [ 30.944718] __vm_munmap+0x138/0x3a0 [ 30.945214] __x64_sys_munmap+0x59/0x80 [ 30.945799] do_syscall_64+0x3f/0x90 [ 30.946292] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.946979] [ 30.947204] Second to last potentially related work creation: [ 30.947935] kasan_save_stack+0x22/0x50 [ 30.948474] __kasan_record_aux_stack+0x8e/0xa0 [ 30.949097] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.949822] remove_vma+0x139/0x170 [ 30.950292] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.950889] do_vmi_munmap+0x1f1/0x2b0 [ 30.951406] mmap_region+0x1f9/0x2660 [ 30.951925] do_mmap+0x854/0xf00 [ 30.952381] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.952904] ksys_mmap_pgoff+0x3af/0x500 [ 30.953459] do_syscall_64+0x3f/0x90 [ 30.953976] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.954658] [ 30.954896] The buggy address belongs to the object at ffff88800dca4488 [ 30.954896] which belongs to the cache vm_area_struct of size 168 [ 30.956487] The buggy address is located 88 bytes inside of [ 30.956487] freed 168-byte region [ffff88800dca4488, ffff88800dca4530) [ 30.958045] [ 30.958274] The buggy address belongs to the physical page: [ 30.958980] page:0000000095759e9b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdca4 [ 30.960139] memcg:ffff88800db10801 [ 30.960588] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.961292] page_type: 0xffffffff() [ 30.961818] raw: 0100000000000200 ffff8880087a0c80 ffffea0000381d40 dead000000000004 [ 30.962798] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db10801 [ 30.963769] page dumped because: kasan: bad access detected [ 30.964467] [ 30.964707] Memory state around the buggy address: [ 30.965351] ffff88800dca4380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.966288] ffff88800dca4400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.967211] >ffff88800dca4480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.968128] ^ [ 30.968939] ffff88800dca4500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 30.969899] ffff88800dca4580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.970830] ================================================================== [ 30.972089] Disabling lock debugging due to kernel taint [ 33.014864] BUG: Bad rss-counter state mm:000000009cb0e509 type:MM_FILEPAGES val:33 [ 33.016484] BUG: Bad rss-counter state mm:000000009cb0e509 type:MM_ANONPAGES val:22 [ 33.480567] BUG: Bad rss-counter state mm:00000000788ef07b type:MM_FILEPAGES val:33 [ 33.481781] BUG: Bad rss-counter state mm:00000000788ef07b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4938' (ECDSA) to the list of known hosts. 2023/06/21 00:37:12 fuzzer started 2023/06/21 00:37:12 dialing manager at localhost:36067 2023/06/21 00:37:12 checking machine... 2023/06/21 00:37:12 checking revisions... [ 34.223051] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:37:12 testing simple program... [ 34.276155] cgroup: Unknown subsys name 'net' [ 34.325959] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:37:12 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8184725c RCX=0000000000000001 RDX=1ffff11003059f1c RSI=ffff8880182cfc58 RDI=ffffffff8184725c RBP=ffffffff8184725c RSP=ffff8880182cf838 R8 =0000000000000001 R9 =ffff8880182cf8c8 R10=0000000000038001 R11=0000000000020c51 R12=0000000000000001 R13=0000000000000000 R14=ffff888015ce9b40 R15=0000000000092cc0 RIP=ffffffff811fc772 RFL=00000287 [--S--PC] 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 00007f7fca16f900 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=000055fb9f98d954 CR3=000000000f05a000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 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=00007ff8bddc78e0 CR3=000000000cb16000 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=2031313a37333a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a37333a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000