syzkaller login: [ 32.754891] BUG: Bad rss-counter state mm:00000000648b179a type:MM_FILEPAGES val:33 [ 32.756287] BUG: Bad rss-counter state mm:00000000648b179a type:MM_ANONPAGES val:22 [ 32.906361] ================================================================== [ 32.907312] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.908307] Read of size 8 at addr ffff888018c5b310 by task sshd/219 [ 32.909264] [ 32.909490] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.910366] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.911379] Call Trace: [ 32.911719] [ 32.912011] dump_stack_lvl+0x91/0xf0 [ 32.912517] print_report+0xcc/0x620 [ 32.913009] ? __virt_addr_valid+0x102/0x340 [ 32.913582] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.914208] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.914843] kasan_report+0xbe/0xf0 [ 32.915325] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.915988] vma_interval_tree_remove+0xc75/0xec0 [ 32.916594] vma_prepare+0xc54/0x11a0 [ 32.917083] __split_vma+0x5af/0x950 [ 32.917561] ? __pfx___split_vma+0x10/0x10 [ 32.918091] ? find_held_lock+0x2c/0x110 [ 32.918614] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.919186] ? lock_is_held_type+0x9f/0x120 [ 32.919739] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.920359] ? mtree_range_walk+0x632/0x900 [ 32.920911] ? mas_walk+0x5c7/0x7c0 [ 32.921391] do_vmi_munmap+0x1f1/0x2b0 [ 32.921886] mmap_region+0x1f9/0x2660 [ 32.922373] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.922889] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.923613] ? __pfx_lock_acquire+0x10/0x10 [ 32.924180] ? __pfx_mmap_region+0x10/0x10 [ 32.924721] ? security_mmap_addr+0x7d/0xa0 [ 32.925266] ? get_unmapped_area+0x1f5/0x3f0 [ 32.925828] do_mmap+0x854/0xf00 [ 32.926266] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.926761] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.927324] ksys_mmap_pgoff+0x3af/0x500 [ 32.927838] do_syscall_64+0x3f/0x90 [ 32.928316] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.928974] RIP: 0033:0x7f90fc395d82 [ 32.929430] 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 [ 32.931942] RSP: 002b:00007ffec524ca08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.933047] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f90fc395d82 [ 32.934083] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f90fb7cf000 [ 32.935134] RBP: 00007f90fb7cf000 R08: 0000000000000009 R09: 0000000000001000 [ 32.936181] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564a5e766ec0 [ 32.937210] R13: 00007ffec524ca20 R14: 00007ffec524ca50 R15: 00007ffec524cdb0 [ 32.938255] [ 32.938609] [ 32.938870] Allocated by task 212: [ 32.939399] kasan_save_stack+0x22/0x50 [ 32.940028] kasan_set_track+0x25/0x30 [ 32.940627] __kasan_slab_alloc+0x59/0x70 [ 32.941262] kmem_cache_alloc+0x16b/0x370 [ 32.941898] vm_area_dup+0x20/0x160 [ 32.942454] __split_vma+0x170/0x950 [ 32.943024] split_vma+0xc6/0x110 [ 32.943563] mprotect_fixup+0x8d2/0xb30 [ 32.944196] do_mprotect_pkey+0x87e/0xd40 [ 32.944833] __x64_sys_mprotect+0x78/0xc0 [ 32.945468] do_syscall_64+0x3f/0x90 [ 32.946047] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.946825] [ 32.947084] Freed by task 212: [ 32.947564] kasan_save_stack+0x22/0x50 [ 32.948183] kasan_set_track+0x25/0x30 [ 32.948773] kasan_save_free_info+0x2b/0x50 [ 32.949410] __kasan_slab_free+0x10a/0x190 [ 32.950050] kmem_cache_free+0x10d/0x4d0 [ 32.950719] rcu_core+0x8c8/0x2860 [ 32.951235] __do_softirq+0x1b7/0x7d4 [ 32.951814] [ 32.952067] Last potentially related work creation: [ 32.952757] kasan_save_stack+0x22/0x50 [ 32.953346] __kasan_record_aux_stack+0x8e/0xa0 [ 32.954014] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.954769] remove_vma+0x139/0x170 [ 32.955296] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.955951] do_vmi_munmap+0x1f1/0x2b0 [ 32.956574] __vm_munmap+0x138/0x3a0 [ 32.957166] __x64_sys_munmap+0x59/0x80 [ 32.957801] do_syscall_64+0x3f/0x90 [ 32.958405] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.959212] [ 32.959480] Second to last potentially related work creation: [ 32.960344] kasan_save_stack+0x22/0x50 [ 32.960986] __kasan_record_aux_stack+0x8e/0xa0 [ 32.961709] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.962527] remove_vma+0x139/0x170 [ 32.963092] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.963808] do_vmi_munmap+0x1f1/0x2b0 [ 32.964405] mmap_region+0x1f9/0x2660 [ 32.965001] do_mmap+0x854/0xf00 [ 32.965523] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.966132] ksys_mmap_pgoff+0x3af/0x500 [ 32.966749] do_syscall_64+0x3f/0x90 [ 32.967331] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.968135] [ 32.968396] The buggy address belongs to the object at ffff888018c5b2b8 [ 32.968396] which belongs to the cache vm_area_struct of size 168 [ 32.970249] The buggy address is located 88 bytes inside of [ 32.970249] freed 168-byte region [ffff888018c5b2b8, ffff888018c5b360) [ 32.972039] [ 32.972303] The buggy address belongs to the physical page: [ 32.973137] page:00000000265cd8a3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18c5b [ 32.974517] memcg:ffff88800e884901 [ 32.975050] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.975867] page_type: 0xffffffff() [ 32.976432] raw: 0100000000000200 ffff88800879fc80 ffffea000031ef40 0000000000000004 [ 32.977585] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e884901 [ 32.978695] page dumped because: kasan: bad access detected [ 32.979513] [ 32.979791] Memory state around the buggy address: [ 32.980518] ffff888018c5b200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 32.981577] ffff888018c5b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.982638] >ffff888018c5b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.983696] ^ [ 32.984278] ffff888018c5b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.985344] ffff888018c5b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.986398] ================================================================== [ 32.987594] Disabling lock debugging due to kernel taint [ 34.825961] BUG: Bad rss-counter state mm:00000000ef5edc2d type:MM_FILEPAGES val:33 [ 34.826950] BUG: Bad rss-counter state mm:00000000ef5edc2d type:MM_ANONPAGES val:22 [ 35.290896] BUG: Bad rss-counter state mm:0000000019d1c32d type:MM_FILEPAGES val:33 [ 35.292065] BUG: Bad rss-counter state mm:0000000019d1c32d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17410' (ECDSA) to the list of known hosts. 2023/06/19 18:39:22 fuzzer started 2023/06/19 18:39:22 dialing manager at localhost:44161 2023/06/19 18:39:23 checking machine... 2023/06/19 18:39:23 checking revisions... [ 36.028066] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:39:23 testing simple program... [ 36.079964] cgroup: Unknown subsys name 'net' [ 36.126094] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:39:20 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff1100d9c1329 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88806ce09938 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8ed0 RFL=00000247 [---Z-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 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=00007f647c79b160 CR3=000000000ca92000 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=bcac46b50ef42585244586177b5a10e7 XMM02=000000000011dd08eff9b2d0a8fce9cb XMM03=000000000011ddd82c67c8bc2e329bc3 XMM04=40162a2647624f8c00000000000ae988 XMM05=dfcdbad4f1609c370000000000134c18 XMM06=806171799158d9670000000000134aa0 XMM07=e042d86d42eb936e0000000000124220 XMM08=a9ecba572d39b1ef000000000011ddd8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88806cf361a0 RCX=ffffffff8182e29e RDX=ffffed1001b405b4 RSI=0000000000000004 RDI=ffff88800da02d98 RBP=ffff88806cf361e0 RSP=ffff88806cf09d60 R8 =0000000000000001 R9 =ffffed1001b405b3 R10=ffff88800da02d9b R11=00000000000b6996 R12=ffff88800da02d80 R13=0000000000000000 R14=0000000000000438 R15=ffff88806cf361f0 RIP=ffffffff8182e2a4 RFL=00000002 [-------] 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 00007fadeb051900 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=00007ffcb28a8000 CR3=000000001a3c0000 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