syzkaller login: [ 67.352949] BUG: Bad rss-counter state mm:0000000064a20b69 type:MM_FILEPAGES val:33 [ 67.354227] BUG: Bad rss-counter state mm:0000000064a20b69 type:MM_ANONPAGES val:22 [ 67.394972] ================================================================== [ 67.396118] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 67.397148] Read of size 8 at addr ffff88800e1d6ed8 by task sshd/220 [ 67.398080] [ 67.398325] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 67.399439] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 67.400506] Call Trace: [ 67.400857] [ 67.401169] dump_stack_lvl+0x91/0xf0 [ 67.401744] print_report+0xcc/0x620 [ 67.402283] ? __virt_addr_valid+0x102/0x340 [ 67.402892] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.403576] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.404257] kasan_report+0xbe/0xf0 [ 67.404783] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.405484] vma_interval_tree_remove+0xc75/0xec0 [ 67.406150] vma_prepare+0xc54/0x11a0 [ 67.406680] __split_vma+0x5af/0x950 [ 67.407198] ? __pfx___split_vma+0x10/0x10 [ 67.407779] ? find_held_lock+0x2c/0x110 [ 67.408348] do_vmi_align_munmap+0x2ba/0x11f0 [ 67.408969] ? lock_is_held_type+0x9f/0x120 [ 67.409573] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 67.410254] ? mtree_range_walk+0x632/0x900 [ 67.410868] ? mas_walk+0x5c7/0x7c0 [ 67.411389] do_vmi_munmap+0x1f1/0x2b0 [ 67.411931] mmap_region+0x1f9/0x2660 [ 67.412464] ? vm_mmap_pgoff+0x15c/0x3a0 [ 67.413031] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 67.413844] ? __pfx_lock_acquire+0x10/0x10 [ 67.414434] ? __pfx_mmap_region+0x10/0x10 [ 67.415020] ? security_mmap_addr+0x7d/0xa0 [ 67.415612] ? get_unmapped_area+0x1f5/0x3f0 [ 67.416221] do_mmap+0x854/0xf00 [ 67.416705] vm_mmap_pgoff+0x1a6/0x3a0 [ 67.417248] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 67.417880] ksys_mmap_pgoff+0x3af/0x500 [ 67.418454] do_syscall_64+0x3f/0x90 [ 67.418989] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.419706] RIP: 0033:0x7ff740b9fd82 [ 67.420215] 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 [ 67.422604] RSP: 002b:00007fff77b62e48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 67.423607] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff740b9fd82 [ 67.424549] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff73ffd9000 [ 67.425491] RBP: 00007ff73ffd9000 R08: 0000000000000009 R09: 0000000000001000 [ 67.426424] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b02cfacf70 [ 67.427360] R13: 00007fff77b62e60 R14: 00007fff77b62e90 R15: 00007fff77b631f0 [ 67.428305] [ 67.428628] [ 67.428866] Allocated by task 213: [ 67.429340] kasan_save_stack+0x22/0x50 [ 67.429905] kasan_set_track+0x25/0x30 [ 67.430448] __kasan_slab_alloc+0x59/0x70 [ 67.431027] kmem_cache_alloc+0x16b/0x370 [ 67.431602] vm_area_dup+0x20/0x160 [ 67.432100] __split_vma+0x170/0x950 [ 67.432614] split_vma+0xc6/0x110 [ 67.433098] mprotect_fixup+0x8d2/0xb30 [ 67.433666] do_mprotect_pkey+0x87e/0xd40 [ 67.434242] __x64_sys_mprotect+0x78/0xc0 [ 67.434817] do_syscall_64+0x3f/0x90 [ 67.435336] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.436038] [ 67.436275] Freed by task 213: [ 67.436709] kasan_save_stack+0x22/0x50 [ 67.437268] kasan_set_track+0x25/0x30 [ 67.437819] kasan_save_free_info+0x2b/0x50 [ 67.438407] __kasan_slab_free+0x10a/0x190 [ 67.438994] kmem_cache_free+0x10d/0x4d0 [ 67.439553] rcu_core+0x8c8/0x2860 [ 67.440049] __do_softirq+0x1b7/0x7d4 [ 67.440573] [ 67.440812] Last potentially related work creation: [ 67.441479] kasan_save_stack+0x22/0x50 [ 67.442037] __kasan_record_aux_stack+0x8e/0xa0 [ 67.442671] __call_rcu_common.constprop.0+0x6a/0xb90 [ 67.443386] remove_vma+0x139/0x170 [ 67.443884] do_vmi_align_munmap+0xd4a/0x11f0 [ 67.444500] do_vmi_munmap+0x1f1/0x2b0 [ 67.445046] __vm_munmap+0x138/0x3a0 [ 67.445578] __x64_sys_munmap+0x59/0x80 [ 67.446125] do_syscall_64+0x3f/0x90 [ 67.446652] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.447358] [ 67.447596] Second to last potentially related work creation: [ 67.448349] kasan_save_stack+0x22/0x50 [ 67.448902] __kasan_record_aux_stack+0x8e/0xa0 [ 67.449557] __call_rcu_common.constprop.0+0x6a/0xb90 [ 67.450263] remove_vma+0x139/0x170 [ 67.450763] do_vmi_align_munmap+0xd4a/0x11f0 [ 67.451383] do_vmi_munmap+0x1f1/0x2b0 [ 67.451922] mmap_region+0x1f9/0x2660 [ 67.452452] do_mmap+0x854/0xf00 [ 67.452926] vm_mmap_pgoff+0x1a6/0x3a0 [ 67.453479] ksys_mmap_pgoff+0x3af/0x500 [ 67.454039] do_syscall_64+0x3f/0x90 [ 67.454558] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.455276] [ 67.455510] The buggy address belongs to the object at ffff88800e1d6e80 [ 67.455510] which belongs to the cache vm_area_struct of size 168 [ 67.457141] The buggy address is located 88 bytes inside of [ 67.457141] freed 168-byte region [ffff88800e1d6e80, ffff88800e1d6f28) [ 67.458719] [ 67.458957] The buggy address belongs to the physical page: [ 67.459691] page:00000000c0acbb9c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1d6 [ 67.460887] memcg:ffff88800df11e01 [ 67.461350] flags: 0x100000000000200(slab|node=0|zone=1) [ 67.462071] page_type: 0xffffffff() [ 67.462575] raw: 0100000000000200 ffff88800879fc80 ffffea00002cf800 dead000000000008 [ 67.463588] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df11e01 [ 67.464594] page dumped because: kasan: bad access detected [ 67.465335] [ 67.465579] Memory state around the buggy address: [ 67.466239] ffff88800e1d6d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 67.467201] ffff88800e1d6e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 67.468151] >ffff88800e1d6e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.469098] ^ [ 67.469921] ffff88800e1d6f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 67.470882] ffff88800e1d6f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 67.471832] ================================================================== [ 67.473060] Disabling lock debugging due to kernel taint [ 69.629720] BUG: Bad rss-counter state mm:000000000c3e0ad7 type:MM_FILEPAGES val:33 [ 69.631234] BUG: Bad rss-counter state mm:000000000c3e0ad7 type:MM_ANONPAGES val:22 [ 70.031578] BUG: Bad rss-counter state mm:00000000937c454f type:MM_FILEPAGES val:33 [ 70.032694] BUG: Bad rss-counter state mm:00000000937c454f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47823' (ECDSA) to the list of known hosts. 2023/06/19 16:20:46 fuzzer started 2023/06/19 16:20:46 dialing manager at localhost:44161 2023/06/19 16:20:46 checking machine... 2023/06/19 16:20:46 checking revisions... [ 70.753693] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:20:46 testing simple program... [ 70.797339] cgroup: Unknown subsys name 'net' [ 70.837130] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:20:14 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff1100201881a RSI=ffffffff81f38384 RDI=0000000000000000 RBP=0000000000000001 RSP=ffff88801035f848 R8 =0000000000000005 R9 =000000000000001b R10=0000000000000001 R11=63206e6f69737365 R12=ffff8880100c4000 R13=0000000000000001 R14=0000000000000000 R15=ffff8880100c4000 RIP=ffffffff81f383d8 RFL=00000256 [---ZAP-] 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 00007fed2eaa0700 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=00007fff22c18a88 CR3=000000000ed7c000 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=00000000000000000000000000000000 XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732035343a3032 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363235 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000001000 RCX=ffffffff8215be29 RDX=ffff888009569b40 RSI=0000000000000000 RDI=0000000000000001 RBP=0000000000000005 RSP=ffff88801473f780 R8 =0000000000000001 R9 =0000000000000005 R10=0000000000000005 R11=0000000000000000 R12=ffff8880094f0000 R13=ffff88801473fe70 R14=00000000000000a4 R15=ffff88801473fe70 RIP=ffffffff814c07eb 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 00007f4e0eb0b900 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=00007f4e0f0c2618 CR3=000000001bf1a000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000