syzkaller login: [ 31.236918] BUG: Bad rss-counter state mm:00000000feb9d21b type:MM_FILEPAGES val:33 [ 31.238098] BUG: Bad rss-counter state mm:00000000feb9d21b type:MM_ANONPAGES val:22 [ 31.282975] ================================================================== [ 31.284022] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.285048] Read of size 8 at addr ffff888018c88310 by task sshd/222 [ 31.285879] [ 31.286117] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.287049] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.288097] Call Trace: [ 31.288438] [ 31.288748] dump_stack_lvl+0x91/0xf0 [ 31.289278] print_report+0xcc/0x620 [ 31.289795] ? __virt_addr_valid+0x102/0x340 [ 31.290393] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.291054] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.291716] kasan_report+0xbe/0xf0 [ 31.292255] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.292918] vma_interval_tree_remove+0xc75/0xec0 [ 31.293572] vma_prepare+0xc54/0x11a0 [ 31.294089] __split_vma+0x5af/0x950 [ 31.294599] ? __pfx___split_vma+0x10/0x10 [ 31.295175] ? find_held_lock+0x2c/0x110 [ 31.295738] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.296359] ? lock_is_held_type+0x9f/0x120 [ 31.296938] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.297600] ? mtree_range_walk+0x632/0x900 [ 31.298196] ? mas_walk+0x5c7/0x7c0 [ 31.298703] do_vmi_munmap+0x1f1/0x2b0 [ 31.299233] mmap_region+0x1f9/0x2660 [ 31.299741] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.300310] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.301075] ? __pfx_lock_acquire+0x10/0x10 [ 31.301638] ? __pfx_mmap_region+0x10/0x10 [ 31.302199] ? security_mmap_addr+0x7d/0xa0 [ 31.302762] ? get_unmapped_area+0x1f5/0x3f0 [ 31.303349] do_mmap+0x854/0xf00 [ 31.303814] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.304347] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.304945] ksys_mmap_pgoff+0x3af/0x500 [ 31.305506] do_syscall_64+0x3f/0x90 [ 31.306043] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.306763] RIP: 0033:0x7f3aedd96d82 [ 31.307288] 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 [ 31.309826] RSP: 002b:00007ffee9c3f908 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.310828] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3aedd96d82 [ 31.311793] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3aed1d0000 [ 31.312753] RBP: 00007f3aed1d0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.313694] R10: 0000000000000812 R11: 0000000000000206 R12: 000056114bf15f70 [ 31.314593] R13: 00007ffee9c3f920 R14: 00007ffee9c3f950 R15: 00007ffee9c3fcb0 [ 31.315509] [ 31.315821] [ 31.316058] Allocated by task 215: [ 31.316517] kasan_save_stack+0x22/0x50 [ 31.317064] kasan_set_track+0x25/0x30 [ 31.317592] __kasan_slab_alloc+0x59/0x70 [ 31.318149] kmem_cache_alloc+0x16b/0x370 [ 31.318701] vm_area_dup+0x20/0x160 [ 31.319183] __split_vma+0x170/0x950 [ 31.319680] split_vma+0xc6/0x110 [ 31.320170] mprotect_fixup+0x8d2/0xb30 [ 31.320735] do_mprotect_pkey+0x87e/0xd40 [ 31.321292] __x64_sys_mprotect+0x78/0xc0 [ 31.321842] do_syscall_64+0x3f/0x90 [ 31.322377] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.323084] [ 31.323317] Freed by task 215: [ 31.323738] kasan_save_stack+0x22/0x50 [ 31.324289] kasan_set_track+0x25/0x30 [ 31.324807] kasan_save_free_info+0x2b/0x50 [ 31.325368] __kasan_slab_free+0x10a/0x190 [ 31.325933] kmem_cache_free+0x10d/0x4d0 [ 31.326468] rcu_core+0x8c8/0x2860 [ 31.326959] __do_softirq+0x1b7/0x7d4 [ 31.327482] [ 31.327711] Last potentially related work creation: [ 31.328347] kasan_save_stack+0x22/0x50 [ 31.328890] __kasan_record_aux_stack+0x8e/0xa0 [ 31.329508] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.330201] remove_vma+0x139/0x170 [ 31.330688] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.331288] do_vmi_munmap+0x1f1/0x2b0 [ 31.331810] __vm_munmap+0x138/0x3a0 [ 31.332329] __x64_sys_munmap+0x59/0x80 [ 31.332863] do_syscall_64+0x3f/0x90 [ 31.333395] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.334097] [ 31.334325] The buggy address belongs to the object at ffff888018c882b8 [ 31.334325] which belongs to the cache vm_area_struct of size 168 [ 31.335919] The buggy address is located 88 bytes inside of [ 31.335919] freed 168-byte region [ffff888018c882b8, ffff888018c88360) [ 31.337459] [ 31.337705] The buggy address belongs to the physical page: [ 31.338427] page:000000003a0df250 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18c88 [ 31.339637] memcg:ffff88801649d501 [ 31.340128] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.340839] page_type: 0xffffffff() [ 31.341328] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.342326] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801649d501 [ 31.343301] page dumped because: kasan: bad access detected [ 31.344007] [ 31.344250] Memory state around the buggy address: [ 31.344871] ffff888018c88200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.345786] ffff888018c88280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.346706] >ffff888018c88300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.347615] ^ [ 31.348122] ffff888018c88380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.349029] ffff888018c88400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.349937] ================================================================== [ 31.351068] Disabling lock debugging due to kernel taint [ 33.501869] BUG: Bad rss-counter state mm:000000006ad5b3d3 type:MM_FILEPAGES val:33 [ 33.503075] BUG: Bad rss-counter state mm:000000006ad5b3d3 type:MM_ANONPAGES val:22 [ 33.984885] BUG: Bad rss-counter state mm:000000003742a46f type:MM_FILEPAGES val:33 [ 33.985986] BUG: Bad rss-counter state mm:000000003742a46f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50805' (ECDSA) to the list of known hosts. 2023/06/20 02:21:33 fuzzer started 2023/06/20 02:21:33 dialing manager at localhost:44161 2023/06/20 02:21:33 checking machine... 2023/06/20 02:21:33 checking revisions... [ 34.744320] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:21:33 testing simple program... [ 34.797901] cgroup: Unknown subsys name 'net' [ 34.838491] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:21:32 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000001 RSI=00000000000000fb RDI=0000000000000001 RBP=ffff88806ce09d18 RSP=ffff88806ce09c50 R8 =0000000000000001 R9 =ffffed100d9c1396 R10=ffff88806ce09cb7 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff8112993a 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 00007ff163553900 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=00007ff163532020 CR3=0000000016a56000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=1ffff1100d9e135e RDX=dffffc0000000000 RSI=ffffffff8180c8da RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86137dd6 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020f00 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130706 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 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=00007f760b8a2b20 CR3=000000000da3e000 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=2032333a31323a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a31323a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000