syzkaller login: [ 37.716261] BUG: Bad rss-counter state mm:000000009ec8aa40 type:MM_FILEPAGES val:33 [ 37.717453] BUG: Bad rss-counter state mm:000000009ec8aa40 type:MM_ANONPAGES val:22 [ 37.795026] ================================================================== [ 37.796150] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.797081] Read of size 8 at addr ffff88800ee26c20 by task sshd/219 [ 37.797949] [ 37.798163] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.799027] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.800021] Call Trace: [ 37.800344] [ 37.800636] dump_stack_lvl+0x91/0xf0 [ 37.801125] print_report+0xcc/0x620 [ 37.801618] ? __virt_addr_valid+0x102/0x340 [ 37.802161] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.802782] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.803388] kasan_report+0xbe/0xf0 [ 37.803862] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.804483] vma_interval_tree_remove+0xc75/0xec0 [ 37.805090] vma_prepare+0xc54/0x11a0 [ 37.805579] __split_vma+0x5af/0x950 [ 37.806053] ? __pfx___split_vma+0x10/0x10 [ 37.806578] ? find_held_lock+0x2c/0x110 [ 37.807097] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.807657] ? lock_is_held_type+0x9f/0x120 [ 37.808214] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.808813] ? mtree_range_walk+0x632/0x900 [ 37.809367] ? mas_walk+0x5c7/0x7c0 [ 37.809837] do_vmi_munmap+0x1f1/0x2b0 [ 37.810328] mmap_region+0x1f9/0x2660 [ 37.810812] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.811316] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.812035] ? __pfx_lock_acquire+0x10/0x10 [ 37.812565] ? __pfx_mmap_region+0x10/0x10 [ 37.813094] ? security_mmap_addr+0x7d/0xa0 [ 37.813624] ? get_unmapped_area+0x1f5/0x3f0 [ 37.814168] do_mmap+0x854/0xf00 [ 37.814603] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.815094] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.815656] ksys_mmap_pgoff+0x3af/0x500 [ 37.816164] do_syscall_64+0x3f/0x90 [ 37.816642] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.817294] RIP: 0033:0x7fcd4b95dd82 [ 37.817756] 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 [ 37.819906] RSP: 002b:00007fffba066da8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.820803] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcd4b95dd82 [ 37.821642] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcd4ad97000 [ 37.822480] RBP: 00007fcd4ad97000 R08: 0000000000000009 R09: 0000000000001000 [ 37.823319] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557f11028ec0 [ 37.824175] R13: 00007fffba066dc0 R14: 00007fffba066df0 R15: 00007fffba067150 [ 37.825026] [ 37.825318] [ 37.825539] Allocated by task 212: [ 37.825964] kasan_save_stack+0x22/0x50 [ 37.826474] kasan_set_track+0x25/0x30 [ 37.826964] __kasan_slab_alloc+0x59/0x70 [ 37.827482] kmem_cache_alloc+0x16b/0x370 [ 37.828009] vm_area_dup+0x20/0x160 [ 37.828480] __split_vma+0x170/0x950 [ 37.828941] split_vma+0xc6/0x110 [ 37.829378] mprotect_fixup+0x8d2/0xb30 [ 37.829884] do_mprotect_pkey+0x87e/0xd40 [ 37.830400] __x64_sys_mprotect+0x78/0xc0 [ 37.830923] do_syscall_64+0x3f/0x90 [ 37.831393] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.832043] [ 37.832256] Freed by task 212: [ 37.832653] kasan_save_stack+0x22/0x50 [ 37.833156] kasan_set_track+0x25/0x30 [ 37.833647] kasan_save_free_info+0x2b/0x50 [ 37.834174] __kasan_slab_free+0x10a/0x190 [ 37.834706] kmem_cache_free+0x10d/0x4d0 [ 37.835220] rcu_core+0x8c8/0x2860 [ 37.835664] __do_softirq+0x1b7/0x7d4 [ 37.836155] [ 37.836376] Last potentially related work creation: [ 37.836959] kasan_save_stack+0x22/0x50 [ 37.837466] __kasan_record_aux_stack+0x8e/0xa0 [ 37.838037] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.838686] remove_vma+0x139/0x170 [ 37.839140] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.839701] do_vmi_munmap+0x1f1/0x2b0 [ 37.840190] __vm_munmap+0x138/0x3a0 [ 37.840663] __x64_sys_munmap+0x59/0x80 [ 37.841159] do_syscall_64+0x3f/0x90 [ 37.841633] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.842272] [ 37.842490] Second to last potentially related work creation: [ 37.843174] kasan_save_stack+0x22/0x50 [ 37.843676] __kasan_record_aux_stack+0x8e/0xa0 [ 37.844261] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.844896] remove_vma+0x139/0x170 [ 37.845354] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.845910] do_vmi_munmap+0x1f1/0x2b0 [ 37.846394] mmap_region+0x1f9/0x2660 [ 37.846875] do_mmap+0x854/0xf00 [ 37.847311] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.847806] ksys_mmap_pgoff+0x3af/0x500 [ 37.848304] do_syscall_64+0x3f/0x90 [ 37.848771] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.849410] [ 37.849628] The buggy address belongs to the object at ffff88800ee26bc8 [ 37.849628] which belongs to the cache vm_area_struct of size 168 [ 37.851095] The buggy address is located 88 bytes inside of [ 37.851095] freed 168-byte region [ffff88800ee26bc8, ffff88800ee26c70) [ 37.852511] [ 37.852729] The buggy address belongs to the physical page: [ 37.853396] page:0000000051c429fc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee26 [ 37.854509] memcg:ffff88800ee27001 [ 37.854930] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.855570] page_type: 0xffffffff() [ 37.856031] raw: 0100000000000200 ffff88800879fc80 ffffea00003f7a40 dead000000000006 [ 37.856943] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee27001 [ 37.857862] page dumped because: kasan: bad access detected [ 37.858540] [ 37.858760] Memory state around the buggy address: [ 37.859339] ffff88800ee26b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.860202] ffff88800ee26b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 37.861067] >ffff88800ee26c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 37.861920] ^ [ 37.862449] ffff88800ee26c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 37.863316] ffff88800ee26d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 37.864189] ================================================================== [ 37.865647] Disabling lock debugging due to kernel taint [ 40.365619] BUG: Bad rss-counter state mm:000000000f57212d type:MM_FILEPAGES val:33 [ 40.366757] BUG: Bad rss-counter state mm:000000000f57212d type:MM_ANONPAGES val:22 [ 40.814945] BUG: Bad rss-counter state mm:00000000c2fb4722 type:MM_FILEPAGES val:33 [ 40.816392] BUG: Bad rss-counter state mm:00000000c2fb4722 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49683' (ECDSA) to the list of known hosts. 2023/06/19 12:17:36 fuzzer started 2023/06/19 12:17:37 dialing manager at localhost:44161 2023/06/19 12:17:37 checking machine... 2023/06/19 12:17:37 checking revisions... [ 41.516875] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:17:37 testing simple program... [ 41.574094] cgroup: Unknown subsys name 'net' [ 41.609945] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:17:35 Registers: info registers vcpu 0 RAX=00007ffe0afc70db RBX=000000000000001b RCX=0000000000000d68 RDX=000000000000001b RSI=000055d8041bfd18 RDI=00007ffe0afc70c0 RBP=0000000000000d68 RSP=00007ffe0afc66a0 R8 =0000000000000000 R9 =006563696c732e6d R10=00007ffe0afc70c0 R11=0000000000000000 R12=00007f15cdbb28a0 R13=00007ffe0afc6c50 R14=0000000000000000 R15=000055d8041bfd33 RIP=00007f15cda75b7c RFL=00000246 [---Z-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 00007f15cd228900 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=00007f15cc6462d0 CR3=000000000c5b2000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=00000000000000000000000000000000 XMM03=0000000000656369767265732e687373 XMM04=242d17baf712bdd700000000000ae988 XMM05=8defe0c07045b1bb0000000000136b38 XMM06=806171799158d96700000000001355b8 XMM07=00000000000000000000000000000000 XMM08=454d49544c4145525f454352554f535f XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86096756 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800e22f868 RSP=ffff88800e22f750 R8 =ffffffff8609675a R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff88800e22f870 R13=ffff88800e22f858 R14=ffff88800e22f7c0 R15=ffff88800e22f810 RIP=ffffffff81130bb0 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 00007fa00047c900 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=00007ffe8265c000 CR3=000000001c9bc000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000