syzkaller login: [ 31.417354] BUG: Bad rss-counter state mm:00000000702cabc7 type:MM_FILEPAGES val:33 [ 31.418803] BUG: Bad rss-counter state mm:00000000702cabc7 type:MM_ANONPAGES val:22 [ 31.582587] ================================================================== [ 31.583508] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.584484] Read of size 8 at addr ffff88800c5b4140 by task sshd/223 [ 31.585269] [ 31.585490] CPU: 0 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.586442] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.587440] Call Trace: [ 31.587766] [ 31.588058] dump_stack_lvl+0x91/0xf0 [ 31.588563] print_report+0xcc/0x620 [ 31.589078] ? __virt_addr_valid+0x102/0x340 [ 31.589641] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.590267] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.590891] kasan_report+0xbe/0xf0 [ 31.591371] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.591998] vma_interval_tree_remove+0xc75/0xec0 [ 31.592631] vma_prepare+0xc54/0x11a0 [ 31.593135] __split_vma+0x5af/0x950 [ 31.593618] ? __pfx___split_vma+0x10/0x10 [ 31.594170] ? find_held_lock+0x2c/0x110 [ 31.594718] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.595300] ? lock_is_held_type+0x9f/0x120 [ 31.595846] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.596451] ? mtree_range_walk+0x632/0x900 [ 31.597016] ? mas_walk+0x5c7/0x7c0 [ 31.597494] do_vmi_munmap+0x1f1/0x2b0 [ 31.597993] mmap_region+0x1f9/0x2660 [ 31.598466] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.598980] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.599717] ? __pfx_lock_acquire+0x10/0x10 [ 31.600264] ? __pfx_mmap_region+0x10/0x10 [ 31.600797] ? security_mmap_addr+0x7d/0xa0 [ 31.601319] ? get_unmapped_area+0x1f5/0x3f0 [ 31.601842] do_mmap+0x854/0xf00 [ 31.602260] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.602729] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.603269] ksys_mmap_pgoff+0x3af/0x500 [ 31.603755] do_syscall_64+0x3f/0x90 [ 31.604213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.604835] RIP: 0033:0x7f3b752f5d82 [ 31.605268] 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 [ 31.607285] RSP: 002b:00007fff0bdd4b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.608233] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3b752f5d82 [ 31.609098] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3b7472f000 [ 31.609951] RBP: 00007f3b7472f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.610813] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558bbdf24ec0 [ 31.611704] R13: 00007fff0bdd4b60 R14: 00007fff0bdd4b90 R15: 00007fff0bdd4ef0 [ 31.612585] [ 31.612894] [ 31.613113] Allocated by task 216: [ 31.613557] kasan_save_stack+0x22/0x50 [ 31.614075] kasan_set_track+0x25/0x30 [ 31.614589] __kasan_slab_alloc+0x59/0x70 [ 31.615148] kmem_cache_alloc+0x16b/0x370 [ 31.615683] vm_area_dup+0x20/0x160 [ 31.616152] __split_vma+0x170/0x950 [ 31.616632] split_vma+0xc6/0x110 [ 31.617099] mprotect_fixup+0x8d2/0xb30 [ 31.617618] do_mprotect_pkey+0x87e/0xd40 [ 31.618147] __x64_sys_mprotect+0x78/0xc0 [ 31.618672] do_syscall_64+0x3f/0x90 [ 31.619154] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.619809] [ 31.620031] Freed by task 216: [ 31.620441] kasan_save_stack+0x22/0x50 [ 31.620966] kasan_set_track+0x25/0x30 [ 31.621477] kasan_save_free_info+0x2b/0x50 [ 31.622008] __kasan_slab_free+0x10a/0x190 [ 31.622559] kmem_cache_free+0x10d/0x4d0 [ 31.623069] rcu_core+0x8c8/0x2860 [ 31.623521] __do_softirq+0x1b7/0x7d4 [ 31.624018] [ 31.624242] Last potentially related work creation: [ 31.624856] kasan_save_stack+0x22/0x50 [ 31.625369] __kasan_record_aux_stack+0x8e/0xa0 [ 31.625962] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.626617] remove_vma+0x139/0x170 [ 31.627071] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.627624] do_vmi_munmap+0x1f1/0x2b0 [ 31.628112] __vm_munmap+0x138/0x3a0 [ 31.628578] __x64_sys_munmap+0x59/0x80 [ 31.629091] do_syscall_64+0x3f/0x90 [ 31.629569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.630214] [ 31.630426] Second to last potentially related work creation: [ 31.631110] kasan_save_stack+0x22/0x50 [ 31.631620] __kasan_record_aux_stack+0x8e/0xa0 [ 31.632190] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.632859] remove_vma+0x139/0x170 [ 31.633317] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.633874] do_vmi_munmap+0x1f1/0x2b0 [ 31.634375] __vm_munmap+0x138/0x3a0 [ 31.634843] __x64_sys_munmap+0x59/0x80 [ 31.635339] do_syscall_64+0x3f/0x90 [ 31.635824] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.636473] [ 31.636690] The buggy address belongs to the object at ffff88800c5b40e8 [ 31.636690] which belongs to the cache vm_area_struct of size 168 [ 31.638163] The buggy address is located 88 bytes inside of [ 31.638163] freed 168-byte region [ffff88800c5b40e8, ffff88800c5b4190) [ 31.639571] [ 31.639787] The buggy address belongs to the physical page: [ 31.640440] page:000000004e6f4f9d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5b4 [ 31.641523] memcg:ffff8880196e9301 [ 31.641959] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.642603] page_type: 0xffffffff() [ 31.643055] raw: 0100000000000200 ffff8880087a0c80 ffffea00003f8080 0000000000000002 [ 31.643981] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880196e9301 [ 31.644908] page dumped because: kasan: bad access detected [ 31.645572] [ 31.645788] Memory state around the buggy address: [ 31.646365] ffff88800c5b4000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.647214] ffff88800c5b4080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.648063] >ffff88800c5b4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.648915] ^ [ 31.649546] ffff88800c5b4180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 31.650396] ffff88800c5b4200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.651251] ================================================================== [ 31.652233] Disabling lock debugging due to kernel taint [ 33.933650] BUG: Bad rss-counter state mm:000000006c497aaa type:MM_FILEPAGES val:33 [ 33.934771] BUG: Bad rss-counter state mm:000000006c497aaa type:MM_ANONPAGES val:22 [ 34.486410] BUG: Bad rss-counter state mm:00000000b3c641c0 type:MM_FILEPAGES val:33 [ 34.487409] BUG: Bad rss-counter state mm:00000000b3c641c0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57688' (ECDSA) to the list of known hosts. 2023/06/20 19:49:32 fuzzer started 2023/06/20 19:49:32 dialing manager at localhost:36067 2023/06/20 19:49:33 checking machine... 2023/06/20 19:49:33 checking revisions... [ 35.046425] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:49:33 testing simple program... [ 35.082726] cgroup: Unknown subsys name 'net' [ 35.126382] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:49:32 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800f6e7c00 RCX=0000000000000000 RDX=1ffff11001edcf82 RSI=ffffffff83aacb03 RDI=ffff88800f6e7c10 RBP=0000000000000000 RSP=ffff88801470f4a8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=000009d6000009d6 R12=ffff888015b2f580 R13=0000000000000000 R14=dffffc0000000000 R15=ffff88800f6e7c00 RIP=ffffffff83aacb1c 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 00007f83a4bf9900 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=00007f6e28837c80 CR3=00000000147bc000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f83a51b0618 CR3=000000001697c000 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=2032333a39343a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a39343a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000