syzkaller login: [ 30.827038] BUG: Bad rss-counter state mm:000000009e22eaa3 type:MM_FILEPAGES val:33 [ 30.828532] BUG: Bad rss-counter state mm:000000009e22eaa3 type:MM_ANONPAGES val:22 [ 30.887453] ================================================================== [ 30.888509] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.889443] Read of size 8 at addr ffff888009bc3968 by task sshd/221 [ 30.890317] [ 30.890535] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.891405] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.892407] Call Trace: [ 30.892724] [ 30.893010] dump_stack_lvl+0x91/0xf0 [ 30.893511] print_report+0xcc/0x620 [ 30.893993] ? __virt_addr_valid+0x102/0x340 [ 30.894543] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.895154] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.895775] kasan_report+0xbe/0xf0 [ 30.896259] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.896875] vma_interval_tree_remove+0xc75/0xec0 [ 30.897471] vma_prepare+0xc54/0x11a0 [ 30.897950] __split_vma+0x5af/0x950 [ 30.898419] ? __pfx___split_vma+0x10/0x10 [ 30.898950] ? find_held_lock+0x2c/0x110 [ 30.899477] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.900071] ? lock_is_held_type+0x9f/0x120 [ 30.900618] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.901225] ? mtree_range_walk+0x632/0x900 [ 30.901780] ? mas_walk+0x5c7/0x7c0 [ 30.902255] do_vmi_munmap+0x1f1/0x2b0 [ 30.902742] mmap_region+0x1f9/0x2660 [ 30.903229] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.903736] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.904458] ? __pfx_lock_acquire+0x10/0x10 [ 30.904992] ? __pfx_mmap_region+0x10/0x10 [ 30.905525] ? security_mmap_addr+0x7d/0xa0 [ 30.906060] ? get_unmapped_area+0x1f5/0x3f0 [ 30.906607] do_mmap+0x854/0xf00 [ 30.907052] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.907555] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.908132] ksys_mmap_pgoff+0x3af/0x500 [ 30.908648] do_syscall_64+0x3f/0x90 [ 30.909133] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.909788] RIP: 0033:0x7fc93e499d82 [ 30.910250] 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 [ 30.912396] RSP: 002b:00007ffd8f3a09a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.913297] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc93e499d82 [ 30.914159] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc93d8d3000 [ 30.915012] RBP: 00007fc93d8d3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.915879] R10: 0000000000000812 R11: 0000000000000206 R12: 00005564e279fd90 [ 30.916738] R13: 00007ffd8f3a09c0 R14: 00007ffd8f3a09f0 R15: 00007ffd8f3a0d50 [ 30.917598] [ 30.917897] [ 30.918113] Allocated by task 214: [ 30.918541] kasan_save_stack+0x22/0x50 [ 30.919044] kasan_set_track+0x25/0x30 [ 30.919543] __kasan_slab_alloc+0x59/0x70 [ 30.920087] kmem_cache_alloc+0x16b/0x370 [ 30.920603] vm_area_dup+0x20/0x160 [ 30.921069] __split_vma+0x170/0x950 [ 30.921539] split_vma+0xc6/0x110 [ 30.921976] mprotect_fixup+0x8d2/0xb30 [ 30.922480] do_mprotect_pkey+0x87e/0xd40 [ 30.923006] __x64_sys_mprotect+0x78/0xc0 [ 30.923523] do_syscall_64+0x3f/0x90 [ 30.924003] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.924645] [ 30.924860] Freed by task 214: [ 30.925258] kasan_save_stack+0x22/0x50 [ 30.925772] kasan_set_track+0x25/0x30 [ 30.926265] kasan_save_free_info+0x2b/0x50 [ 30.926796] __kasan_slab_free+0x10a/0x190 [ 30.927324] kmem_cache_free+0x10d/0x4d0 [ 30.927859] rcu_core+0x8c8/0x2860 [ 30.928301] __do_softirq+0x1b7/0x7d4 [ 30.928780] [ 30.928997] Last potentially related work creation: [ 30.929580] kasan_save_stack+0x22/0x50 [ 30.930085] __kasan_record_aux_stack+0x8e/0xa0 [ 30.930669] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.931314] remove_vma+0x139/0x170 [ 30.931763] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.932333] do_vmi_munmap+0x1f1/0x2b0 [ 30.932816] __vm_munmap+0x138/0x3a0 [ 30.933287] __x64_sys_munmap+0x59/0x80 [ 30.933785] do_syscall_64+0x3f/0x90 [ 30.934263] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.934904] [ 30.935120] The buggy address belongs to the object at ffff888009bc3910 [ 30.935120] which belongs to the cache vm_area_struct of size 168 [ 30.936593] The buggy address is located 88 bytes inside of [ 30.936593] freed 168-byte region [ffff888009bc3910, ffff888009bc39b8) [ 30.937991] [ 30.938204] The buggy address belongs to the physical page: [ 30.938867] page:00000000774e0ffa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9bc3 [ 30.939964] memcg:ffff8880094b5301 [ 30.940397] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.941091] page_type: 0xffffffff() [ 30.941541] raw: 0100000000000200 ffff8880087a0c80 ffffea0000586800 dead000000000007 [ 30.942461] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880094b5301 [ 30.943372] page dumped because: kasan: bad access detected [ 30.944050] [ 30.944266] Memory state around the buggy address: [ 30.944839] ffff888009bc3800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.945696] ffff888009bc3880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.946552] >ffff888009bc3900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.947405] ^ [ 30.948209] ffff888009bc3980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.949073] ffff888009bc3a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.949926] ================================================================== [ 30.951056] Disabling lock debugging due to kernel taint [ 33.144794] BUG: Bad rss-counter state mm:00000000dc890d52 type:MM_FILEPAGES val:33 [ 33.145505] BUG: Bad rss-counter state mm:00000000dc890d52 type:MM_ANONPAGES val:22 [ 33.578100] BUG: Bad rss-counter state mm:00000000f02c006a type:MM_FILEPAGES val:33 [ 33.578780] BUG: Bad rss-counter state mm:00000000f02c006a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6383' (ECDSA) to the list of known hosts. 2023/06/21 03:59:39 fuzzer started 2023/06/21 03:59:39 dialing manager at localhost:36067 2023/06/21 03:59:39 checking machine... 2023/06/21 03:59:39 checking revisions... [ 34.274531] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:59:39 testing simple program... [ 34.331884] cgroup: Unknown subsys name 'net' [ 34.393971] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:59:39 Registers: info registers vcpu 0 RAX=ffffed10036b4180 RBX=ffffed10036b4200 RCX=ffffffff82157d07 RDX=ffffed10036b4200 RSI=0000000000001000 RDI=ffff88801b5a0000 RBP=ffffed10036b4000 RSP=ffff8880102b7978 R8 =0000000000000000 R9 =ffffed10036b41ff R10=ffff88801b5a0fff R11=0000000000000040 R12=ffff88801b5a0000 R13=0000559564550e90 R14=0000000000000000 R15=ffff8880102b7db0 RIP=ffffffff8180f0ed 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 00007fb1e3514900 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=00007fb1e3ac9650 CR3=000000000d6c6000 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=6c697473206e61632073726573552023 XMM01=20656c706f657020726568746f20776f XMM02=ffffffffffffff00ffff000000000000 XMM03=796e6120776f6c6c6120746f6e206f74 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffff00ffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888015defe20 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888015defb01 RSI=ffff888015defbd8 RDI=ffff888015defbd8 RBP=ffff888015def788 RSP=ffff888015def6c0 R8 =0000000000000001 R9 =ffff888015def770 R10=0000000000038001 R11=00000000000246fc R12=ffff888015def790 R13=ffff888015def778 R14=ffff888015defbd8 R15=ffff888015def730 RIP=ffffffff81131236 RFL=00000202 [-------] 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 00007f304cf4d700 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=00007ffdec6c1718 CR3=000000000cba2000 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=2039333a39353a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a39353a3330203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000