syzkaller login: [ 38.720503] BUG: Bad rss-counter state mm:000000009fc3b3c3 type:MM_FILEPAGES val:33 [ 38.721597] BUG: Bad rss-counter state mm:000000009fc3b3c3 type:MM_ANONPAGES val:22 [ 38.904514] ================================================================== [ 38.905493] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.906539] Read of size 8 at addr ffff88800e9c3b38 by task sshd/218 [ 38.907509] [ 38.907745] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.908672] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.909873] Call Trace: [ 38.910320] [ 38.910686] dump_stack_lvl+0x91/0xf0 [ 38.911318] print_report+0xcc/0x620 [ 38.911935] ? __virt_addr_valid+0x102/0x340 [ 38.912638] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.913416] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.914200] kasan_report+0xbe/0xf0 [ 38.914809] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.915590] vma_interval_tree_remove+0xc75/0xec0 [ 38.916347] vma_prepare+0xc54/0x11a0 [ 38.916947] __split_vma+0x5af/0x950 [ 38.917542] ? __pfx___split_vma+0x10/0x10 [ 38.918242] ? find_held_lock+0x2c/0x110 [ 38.918823] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.919428] ? lock_is_held_type+0x9f/0x120 [ 38.920008] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.920655] ? mtree_range_walk+0x632/0x900 [ 38.921249] ? mas_walk+0x5c7/0x7c0 [ 38.921759] do_vmi_munmap+0x1f1/0x2b0 [ 38.922294] mmap_region+0x1f9/0x2660 [ 38.922802] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.923351] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.924116] ? __pfx_lock_acquire+0x10/0x10 [ 38.924681] ? __pfx_mmap_region+0x10/0x10 [ 38.925254] ? security_mmap_addr+0x7d/0xa0 [ 38.925814] ? get_unmapped_area+0x1f5/0x3f0 [ 38.926411] do_mmap+0x854/0xf00 [ 38.926879] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.927410] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.928011] ksys_mmap_pgoff+0x3af/0x500 [ 38.928559] do_syscall_64+0x3f/0x90 [ 38.929067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.929762] RIP: 0033:0x7fdbbf085d82 [ 38.930269] 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 [ 38.932560] RSP: 002b:00007ffdd9899f08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.933515] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdbbf085d82 [ 38.934421] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdbbe4bf000 [ 38.935312] RBP: 00007fdbbe4bf000 R08: 0000000000000009 R09: 0000000000001000 [ 38.936197] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564f19698ec0 [ 38.937085] R13: 00007ffdd9899f20 R14: 00007ffdd9899f50 R15: 00007ffdd989a2b0 [ 38.938006] [ 38.938314] [ 38.938541] Allocated by task 211: [ 38.938995] kasan_save_stack+0x22/0x50 [ 38.939528] kasan_set_track+0x25/0x30 [ 38.940048] __kasan_slab_alloc+0x59/0x70 [ 38.940603] kmem_cache_alloc+0x16b/0x370 [ 38.941154] vm_area_dup+0x20/0x160 [ 38.941633] __split_vma+0x170/0x950 [ 38.942125] split_vma+0xc6/0x110 [ 38.942593] mprotect_fixup+0x8d2/0xb30 [ 38.943125] do_mprotect_pkey+0x87e/0xd40 [ 38.943670] __x64_sys_mprotect+0x78/0xc0 [ 38.944224] do_syscall_64+0x3f/0x90 [ 38.944726] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.945412] [ 38.945641] Freed by task 13: [ 38.946050] kasan_save_stack+0x22/0x50 [ 38.946581] kasan_set_track+0x25/0x30 [ 38.947112] kasan_save_free_info+0x2b/0x50 [ 38.947676] __kasan_slab_free+0x10a/0x190 [ 38.948241] kmem_cache_free+0x10d/0x4d0 [ 38.948857] rcu_core+0x8c8/0x2860 [ 38.949325] __do_softirq+0x1b7/0x7d4 [ 38.949828] [ 38.950061] Last potentially related work creation: [ 38.950689] kasan_save_stack+0x22/0x50 [ 38.951215] __kasan_record_aux_stack+0x8e/0xa0 [ 38.951815] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.952486] remove_vma+0x139/0x170 [ 38.952960] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.953536] do_vmi_munmap+0x1f1/0x2b0 [ 38.954053] __vm_munmap+0x138/0x3a0 [ 38.954547] __x64_sys_munmap+0x59/0x80 [ 38.955065] do_syscall_64+0x3f/0x90 [ 38.955563] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.956234] [ 38.956458] Second to last potentially related work creation: [ 38.957166] kasan_save_stack+0x22/0x50 [ 38.957686] __kasan_record_aux_stack+0x8e/0xa0 [ 38.958301] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.958967] remove_vma+0x139/0x170 [ 38.959433] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.960014] do_vmi_munmap+0x1f1/0x2b0 [ 38.960524] mmap_region+0x1f9/0x2660 [ 38.961022] do_mmap+0x854/0xf00 [ 38.961469] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.961989] ksys_mmap_pgoff+0x3af/0x500 [ 38.962512] do_syscall_64+0x3f/0x90 [ 38.963008] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.963684] [ 38.963906] The buggy address belongs to the object at ffff88800e9c3ae0 [ 38.963906] which belongs to the cache vm_area_struct of size 168 [ 38.965430] The buggy address is located 88 bytes inside of [ 38.965430] freed 168-byte region [ffff88800e9c3ae0, ffff88800e9c3b88) [ 38.966896] [ 38.967124] The buggy address belongs to the physical page: [ 38.967803] page:000000008bcc87a0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe9c3 [ 38.968920] memcg:ffff88800d5c0501 [ 38.969362] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.970086] page_type: 0xffffffff() [ 38.970548] raw: 0100000000000200 ffff8880087a0c80 ffffea00003aabc0 dead000000000005 [ 38.971511] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d5c0501 [ 38.972437] page dumped because: kasan: bad access detected [ 38.973115] [ 38.973336] Memory state around the buggy address: [ 38.973952] ffff88800e9c3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.974823] ffff88800e9c3a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 38.975704] >ffff88800e9c3b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.976581] ^ [ 38.977203] ffff88800e9c3b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 38.978086] ffff88800e9c3c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.978954] ================================================================== [ 38.979898] Disabling lock debugging due to kernel taint [ 41.010956] BUG: Bad rss-counter state mm:000000004fddcb5b type:MM_FILEPAGES val:33 [ 41.012122] BUG: Bad rss-counter state mm:000000004fddcb5b type:MM_ANONPAGES val:22 [ 41.423400] BUG: Bad rss-counter state mm:000000000b0df92e type:MM_FILEPAGES val:33 [ 41.425109] BUG: Bad rss-counter state mm:000000000b0df92e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6481' (ECDSA) to the list of known hosts. 2023/06/21 05:46:49 fuzzer started 2023/06/21 05:46:49 dialing manager at localhost:36067 2023/06/21 05:46:49 checking machine... 2023/06/21 05:46:49 checking revisions... [ 42.255475] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:46:49 testing simple program... [ 42.305681] cgroup: Unknown subsys name 'net' [ 42.344033] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:46:49 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=ffffffff81656bdc RDX=1ffffd40000d9608 RSI=0000000000000000 RDI=0000000000000000 RBP=ffffea00006cb040 RSP=ffff8880090bfa68 R8 =0000000000000000 R9 =fffff940000d9608 R10=ffffea00006cb047 R11=0000000000000128 R12=ffffea00006cb074 R13=ffff888019b99828 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff814c03a8 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 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=000055a9b978f768 CR3=000000001a11c000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800ca56400 RCX=ffffffff814d45b2 RDX=ffff888016be9b40 RSI=0000000000000000 RDI=0000000000000001 RBP=0000000000000001 RSP=ffff88800da8fde8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffffffffffffffff R13=0000000000000000 R14=ffff88800da8fe30 R15=0000000000000000 RIP=ffffffff814d49a4 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 00007fd2beb78900 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=00007fd2be008c68 CR3=0000000014166000 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=b3285ca56c489dff000000000010a1e0 XMM01=a4a5482b7e612688ab4c5bdceb122623 XMM02=ec2efd57dc4c00df000000000011be80 XMM03=da005cefd687482c000000000011bf50 XMM04=c2f277e0fee7c0f100000000000ae988 XMM05=e6079c878290f65c0000000000134180 XMM06=751b9502027dc0b90000000000132f58 XMM07=fb795ef6d657705600000000001220f8 XMM08=2c67c8bc2e329bc3000000000011bef0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000