syzkaller login: [ 220.958298] BUG: Bad rss-counter state mm:00000000da6d0b46 type:MM_FILEPAGES val:33 [ 220.959221] BUG: Bad rss-counter state mm:00000000da6d0b46 type:MM_ANONPAGES val:22 [ 221.116183] ================================================================== [ 221.117057] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 221.117935] Read of size 8 at addr ffff88801a63e968 by task sshd/220 [ 221.118654] [ 221.118863] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 221.119991] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 221.120898] Call Trace: [ 221.121199] [ 221.121471] dump_stack_lvl+0x91/0xf0 [ 221.121929] print_report+0xcc/0x620 [ 221.122385] ? __virt_addr_valid+0x102/0x340 [ 221.122906] ? vma_interval_tree_remove+0xc75/0xec0 [ 221.123516] ? vma_interval_tree_remove+0xc75/0xec0 [ 221.124093] kasan_report+0xbe/0xf0 [ 221.124546] ? vma_interval_tree_remove+0xc75/0xec0 [ 221.125136] vma_interval_tree_remove+0xc75/0xec0 [ 221.125706] vma_prepare+0xc54/0x11a0 [ 221.126155] __split_vma+0x5af/0x950 [ 221.126603] ? __pfx___split_vma+0x10/0x10 [ 221.127112] ? find_held_lock+0x2c/0x110 [ 221.127607] do_vmi_align_munmap+0x2ba/0x11f0 [ 221.128154] ? lock_is_held_type+0x9f/0x120 [ 221.128687] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 221.129286] ? mtree_range_walk+0x632/0x900 [ 221.129835] ? mas_walk+0x5c7/0x7c0 [ 221.130309] do_vmi_munmap+0x1f1/0x2b0 [ 221.130796] mmap_region+0x1f9/0x2660 [ 221.131293] ? vm_mmap_pgoff+0x15c/0x3a0 [ 221.131808] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 221.132512] ? __pfx_lock_acquire+0x10/0x10 [ 221.133041] ? __pfx_mmap_region+0x10/0x10 [ 221.133575] ? security_mmap_addr+0x7d/0xa0 [ 221.134102] ? get_unmapped_area+0x1f5/0x3f0 [ 221.134651] do_mmap+0x854/0xf00 [ 221.135095] vm_mmap_pgoff+0x1a6/0x3a0 [ 221.135598] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 221.136160] ksys_mmap_pgoff+0x3af/0x500 [ 221.136662] do_syscall_64+0x3f/0x90 [ 221.137284] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 221.138178] RIP: 0033:0x7fb613902d82 [ 221.138813] 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 [ 221.141766] RSP: 002b:00007ffd14d107d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 221.143014] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb613902d82 [ 221.144213] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb612d3c000 [ 221.145377] RBP: 00007fb612d3c000 R08: 0000000000000009 R09: 0000000000001000 [ 221.146559] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562675852b20 [ 221.147768] R13: 00007ffd14d107f0 R14: 00007ffd14d10820 R15: 00007ffd14d10b80 [ 221.148949] [ 221.149362] [ 221.149654] Allocated by task 213: [ 221.150248] kasan_save_stack+0x22/0x50 [ 221.150959] kasan_set_track+0x25/0x30 [ 221.151662] __kasan_slab_alloc+0x59/0x70 [ 221.152397] kmem_cache_alloc+0x16b/0x370 [ 221.153119] vm_area_dup+0x20/0x160 [ 221.153755] __split_vma+0x170/0x950 [ 221.154401] split_vma+0xc6/0x110 [ 221.155018] mprotect_fixup+0x8d2/0xb30 [ 221.155699] do_mprotect_pkey+0x87e/0xd40 [ 221.156299] __x64_sys_mprotect+0x78/0xc0 [ 221.156830] do_syscall_64+0x3f/0x90 [ 221.157325] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 221.157976] [ 221.158275] Freed by task 213: [ 221.158815] kasan_save_stack+0x22/0x50 [ 221.159522] kasan_set_track+0x25/0x30 [ 221.160208] kasan_save_free_info+0x2b/0x50 [ 221.160819] __kasan_slab_free+0x10a/0x190 [ 221.161373] kmem_cache_free+0x10d/0x4d0 [ 221.161894] rcu_core+0x8c8/0x2860 [ 221.162383] __do_softirq+0x1b7/0x7d4 [ 221.162857] [ 221.163069] Last potentially related work creation: [ 221.163675] kasan_save_stack+0x22/0x50 [ 221.164189] __kasan_record_aux_stack+0x8e/0xa0 [ 221.164754] __call_rcu_common.constprop.0+0x6a/0xb90 [ 221.165402] remove_vma+0x139/0x170 [ 221.165844] do_vmi_align_munmap+0xd4a/0x11f0 [ 221.166385] do_vmi_munmap+0x1f1/0x2b0 [ 221.166864] __vm_munmap+0x138/0x3a0 [ 221.167337] __x64_sys_munmap+0x59/0x80 [ 221.167830] do_syscall_64+0x3f/0x90 [ 221.168295] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 221.168923] [ 221.169133] The buggy address belongs to the object at ffff88801a63e910 [ 221.169133] which belongs to the cache vm_area_struct of size 168 [ 221.170594] The buggy address is located 88 bytes inside of [ 221.170594] freed 168-byte region [ffff88801a63e910, ffff88801a63e9b8) [ 221.172002] [ 221.172213] The buggy address belongs to the physical page: [ 221.172860] page:0000000086575bb4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a63e [ 221.173955] memcg:ffff8880188f0d01 [ 221.174378] flags: 0x100000000000200(slab|node=0|zone=1) [ 221.175015] page_type: 0xffffffff() [ 221.175480] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 221.176395] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880188f0d01 [ 221.177296] page dumped because: kasan: bad access detected [ 221.177944] [ 221.178158] Memory state around the buggy address: [ 221.178730] ffff88801a63e800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 221.179579] ffff88801a63e880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 221.180433] >ffff88801a63e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 221.181277] ^ [ 221.182049] ffff88801a63e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 221.182912] ffff88801a63ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 221.183797] ================================================================== [ 221.185078] Disabling lock debugging due to kernel taint [ 223.354285] BUG: Bad rss-counter state mm:000000003260d523 type:MM_FILEPAGES val:33 [ 223.355520] BUG: Bad rss-counter state mm:000000003260d523 type:MM_ANONPAGES val:22 [ 223.880999] BUG: Bad rss-counter state mm:000000004dce09d1 type:MM_FILEPAGES val:33 [ 223.881967] BUG: Bad rss-counter state mm:000000004dce09d1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48106' (ECDSA) to the list of known hosts. 2023/06/19 22:33:17 fuzzer started 2023/06/19 22:33:17 dialing manager at localhost:44161 2023/06/19 22:33:17 checking machine... 2023/06/19 22:33:17 checking revisions... [ 224.512325] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:33:17 testing simple program... [ 224.562390] cgroup: Unknown subsys name 'net' [ 224.604681] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:30:07 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffd8a8ec578 CR3=000000000f41a000 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=2036313a33333a3232203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a33333a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8366ccbf RBX=ffffffff85fa6b0c RCX=ffffffff8366cd3b RDX=0000000000000000 RSI=ffffffff863b66a0 RDI=ffffffff85fa6b0c RBP=ffffffff85fa6b10 RSP=ffff88800f0f73d8 R8 =ffffffff863b66a0 R9 =ffff88800f0f74d0 R10=0000000000038001 R11=000000000008b5ce R12=ffffffff85fa6b0c R13=ffffffff85fa6b0c R14=ffffffff85fa6b0c R15=dffffc0000000000 RIP=ffffffff8112fc4f RFL=00000212 [----A--] 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 00007f2658496900 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=00007f2658a4d618 CR3=000000000f2f0000 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