syzkaller login: [ 43.911685] BUG: Bad rss-counter state mm:00000000175ef196 type:MM_FILEPAGES val:33 [ 43.912765] BUG: Bad rss-counter state mm:00000000175ef196 type:MM_ANONPAGES val:22 [ 44.087588] ================================================================== [ 44.088577] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.089802] Read of size 8 at addr ffff88800df9aa50 by task sshd/218 [ 44.090654] [ 44.090888] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.091851] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.092839] Call Trace: [ 44.093206] [ 44.093520] dump_stack_lvl+0x91/0xf0 [ 44.094055] print_report+0xcc/0x620 [ 44.094586] ? __virt_addr_valid+0x102/0x340 [ 44.095208] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.095990] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.096675] kasan_report+0xbe/0xf0 [ 44.097227] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.097912] vma_interval_tree_remove+0xc75/0xec0 [ 44.098582] vma_prepare+0xc54/0x11a0 [ 44.099105] __split_vma+0x5af/0x950 [ 44.099628] ? __pfx___split_vma+0x10/0x10 [ 44.100190] ? find_held_lock+0x2c/0x110 [ 44.100706] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.101325] ? lock_is_held_type+0x9f/0x120 [ 44.101921] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.102587] ? mtree_range_walk+0x632/0x900 [ 44.103185] ? mas_walk+0x5c7/0x7c0 [ 44.103655] do_vmi_munmap+0x1f1/0x2b0 [ 44.104185] mmap_region+0x1f9/0x2660 [ 44.104712] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.105279] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.106051] ? __pfx_lock_acquire+0x10/0x10 [ 44.106637] ? __pfx_mmap_region+0x10/0x10 [ 44.107190] ? security_mmap_addr+0x7d/0xa0 [ 44.107723] ? get_unmapped_area+0x1f5/0x3f0 [ 44.108323] do_mmap+0x854/0xf00 [ 44.108893] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.109497] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.110116] ksys_mmap_pgoff+0x3af/0x500 [ 44.110671] do_syscall_64+0x3f/0x90 [ 44.111191] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.111906] RIP: 0033:0x7f553ac42d82 [ 44.112371] 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 [ 44.114676] RSP: 002b:00007ffd8d94cc68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.115839] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f553ac42d82 [ 44.116771] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f553a07c000 [ 44.117719] RBP: 00007f553a07c000 R08: 0000000000000009 R09: 0000000000001000 [ 44.118654] R10: 0000000000000812 R11: 0000000000000206 R12: 00005641d5f0bd90 [ 44.119529] R13: 00007ffd8d94cc80 R14: 00007ffd8d94ccb0 R15: 00007ffd8d94d010 [ 44.120442] [ 44.120764] [ 44.121005] Allocated by task 211: [ 44.121489] kasan_save_stack+0x22/0x50 [ 44.122045] kasan_set_track+0x25/0x30 [ 44.122593] __kasan_slab_alloc+0x59/0x70 [ 44.123157] kmem_cache_alloc+0x16b/0x370 [ 44.123686] vm_area_dup+0x20/0x160 [ 44.124178] __split_vma+0x170/0x950 [ 44.124692] split_vma+0xc6/0x110 [ 44.125193] mprotect_fixup+0x8d2/0xb30 [ 44.125749] do_mprotect_pkey+0x87e/0xd40 [ 44.126324] __x64_sys_mprotect+0x78/0xc0 [ 44.126903] do_syscall_64+0x3f/0x90 [ 44.127385] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.128048] [ 44.128286] Freed by task 211: [ 44.128720] kasan_save_stack+0x22/0x50 [ 44.129290] kasan_set_track+0x25/0x30 [ 44.129840] kasan_save_free_info+0x2b/0x50 [ 44.130427] __kasan_slab_free+0x10a/0x190 [ 44.131016] kmem_cache_free+0x10d/0x4d0 [ 44.131527] rcu_core+0x8c8/0x2860 [ 44.131990] __do_softirq+0x1b7/0x7d4 [ 44.132518] [ 44.132758] Last potentially related work creation: [ 44.133419] kasan_save_stack+0x22/0x50 [ 44.133978] __kasan_record_aux_stack+0x8e/0xa0 [ 44.134615] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.135295] remove_vma+0x139/0x170 [ 44.135745] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.136352] do_vmi_munmap+0x1f1/0x2b0 [ 44.136894] __vm_munmap+0x138/0x3a0 [ 44.137433] __x64_sys_munmap+0x59/0x80 [ 44.137985] do_syscall_64+0x3f/0x90 [ 44.138517] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.139238] [ 44.139478] Second to last potentially related work creation: [ 44.140220] kasan_save_stack+0x22/0x50 [ 44.140723] __kasan_record_aux_stack+0x8e/0xa0 [ 44.141357] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.142077] remove_vma+0x139/0x170 [ 44.142577] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.143211] do_vmi_munmap+0x1f1/0x2b0 [ 44.143755] __vm_munmap+0x138/0x3a0 [ 44.144284] __x64_sys_munmap+0x59/0x80 [ 44.144843] do_syscall_64+0x3f/0x90 [ 44.145393] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.146110] [ 44.146354] The buggy address belongs to the object at ffff88800df9a9f8 [ 44.146354] which belongs to the cache vm_area_struct of size 168 [ 44.147885] The buggy address is located 88 bytes inside of [ 44.147885] freed 168-byte region [ffff88800df9a9f8, ffff88800df9aaa0) [ 44.149474] [ 44.149720] The buggy address belongs to the physical page: [ 44.150459] page:0000000046deb415 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf9a [ 44.151599] memcg:ffff888014468d01 [ 44.152040] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.152763] page_type: 0xffffffff() [ 44.153285] raw: 0100000000000200 ffff88800879fc80 ffffea0000678880 dead000000000004 [ 44.154328] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014468d01 [ 44.155313] page dumped because: kasan: bad access detected [ 44.155988] [ 44.156231] Memory state around the buggy address: [ 44.156890] ffff88800df9a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.157864] ffff88800df9a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 44.158907] >ffff88800df9aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.159876] ^ [ 44.160610] ffff88800df9aa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 44.161563] ffff88800df9ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.162525] ================================================================== [ 44.163755] Disabling lock debugging due to kernel taint [ 46.834302] BUG: Bad rss-counter state mm:000000002aeafa56 type:MM_FILEPAGES val:33 [ 46.835444] BUG: Bad rss-counter state mm:000000002aeafa56 type:MM_ANONPAGES val:22 [ 47.266943] BUG: Bad rss-counter state mm:00000000f33f752e type:MM_FILEPAGES val:33 [ 47.267656] BUG: Bad rss-counter state mm:00000000f33f752e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9265' (ECDSA) to the list of known hosts. 2023/06/20 01:02:06 fuzzer started 2023/06/20 01:02:06 dialing manager at localhost:44161 2023/06/20 01:02:06 checking machine... 2023/06/20 01:02:06 checking revisions... [ 47.927198] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:02:06 testing simple program... [ 47.966084] cgroup: Unknown subsys name 'net' [ 48.016899] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:01:51 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000002 RCX=ffffffff81894bfc RDX=ffff88801765d1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888015e6f6c8 RSP=ffff88800e8d7c50 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000002 R14=ffffffff856f0b20 R15=ffff888015e6f6ca 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 00007f439e72c900 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=00007f439ece1650 CR3=000000000de3c000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 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=000055b077e17b40 CR3=00000000168a8000 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=32303a3130203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343531 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000