syzkaller login: [ 34.149908] BUG: Bad rss-counter state mm:00000000f0a02222 type:MM_FILEPAGES val:33 [ 34.151590] BUG: Bad rss-counter state mm:00000000f0a02222 type:MM_ANONPAGES val:22 [ 34.351053] ================================================================== [ 34.352111] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.353190] Read of size 8 at addr ffff888017e2a798 by task sshd/220 [ 34.354253] [ 34.354499] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.355491] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.356636] Call Trace: [ 34.357003] [ 34.357321] dump_stack_lvl+0x91/0xf0 [ 34.357881] print_report+0xcc/0x620 [ 34.358420] ? __virt_addr_valid+0x102/0x340 [ 34.359064] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.359754] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.360488] kasan_report+0xbe/0xf0 [ 34.361048] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.361756] vma_interval_tree_remove+0xc75/0xec0 [ 34.362467] vma_prepare+0xc54/0x11a0 [ 34.363056] __split_vma+0x5af/0x950 [ 34.363596] ? __pfx___split_vma+0x10/0x10 [ 34.364224] ? find_held_lock+0x2c/0x110 [ 34.364854] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.365515] ? lock_is_held_type+0x9f/0x120 [ 34.366148] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.366851] ? mtree_range_walk+0x632/0x900 [ 34.367513] ? mas_walk+0x5c7/0x7c0 [ 34.368088] do_vmi_munmap+0x1f1/0x2b0 [ 34.368694] mmap_region+0x1f9/0x2660 [ 34.369268] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.369872] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.370699] ? __pfx_lock_acquire+0x10/0x10 [ 34.371366] ? __pfx_mmap_region+0x10/0x10 [ 34.371999] ? security_mmap_addr+0x7d/0xa0 [ 34.372628] ? get_unmapped_area+0x1f5/0x3f0 [ 34.373280] do_mmap+0x854/0xf00 [ 34.373787] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.374367] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.375054] ksys_mmap_pgoff+0x3af/0x500 [ 34.375643] do_syscall_64+0x3f/0x90 [ 34.376213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.377007] RIP: 0033:0x7f71271c3d82 [ 34.377529] 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 [ 34.380054] RSP: 002b:00007ffd70f5ef38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.381132] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f71271c3d82 [ 34.382126] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f71265fd000 [ 34.383129] RBP: 00007f71265fd000 R08: 0000000000000009 R09: 0000000000001000 [ 34.384132] R10: 0000000000000812 R11: 0000000000000206 R12: 00005583dd865b20 [ 34.385152] R13: 00007ffd70f5ef50 R14: 00007ffd70f5ef80 R15: 00007ffd70f5f2e0 [ 34.386162] [ 34.386496] [ 34.386740] Allocated by task 213: [ 34.387268] kasan_save_stack+0x22/0x50 [ 34.387879] kasan_set_track+0x25/0x30 [ 34.388468] __kasan_slab_alloc+0x59/0x70 [ 34.389091] kmem_cache_alloc+0x16b/0x370 [ 34.389690] vm_area_dup+0x20/0x160 [ 34.390231] __split_vma+0x170/0x950 [ 34.390770] split_vma+0xc6/0x110 [ 34.391305] mprotect_fixup+0x8d2/0xb30 [ 34.391906] do_mprotect_pkey+0x87e/0xd40 [ 34.392517] __x64_sys_mprotect+0x78/0xc0 [ 34.393139] do_syscall_64+0x3f/0x90 [ 34.393688] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.394451] [ 34.394697] Freed by task 213: [ 34.395185] kasan_save_stack+0x22/0x50 [ 34.395763] kasan_set_track+0x25/0x30 [ 34.396346] kasan_save_free_info+0x2b/0x50 [ 34.397007] __kasan_slab_free+0x10a/0x190 [ 34.397618] kmem_cache_free+0x10d/0x4d0 [ 34.398234] rcu_core+0x8c8/0x2860 [ 34.398754] __do_softirq+0x1b7/0x7d4 [ 34.399338] [ 34.399585] Last potentially related work creation: [ 34.400280] kasan_save_stack+0x22/0x50 [ 34.400900] __kasan_record_aux_stack+0x8e/0xa0 [ 34.401554] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.402318] remove_vma+0x139/0x170 [ 34.402854] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.403517] do_vmi_munmap+0x1f1/0x2b0 [ 34.404098] __vm_munmap+0x138/0x3a0 [ 34.404644] __x64_sys_munmap+0x59/0x80 [ 34.405233] do_syscall_64+0x3f/0x90 [ 34.405775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.406529] [ 34.406778] The buggy address belongs to the object at ffff888017e2a740 [ 34.406778] which belongs to the cache vm_area_struct of size 168 [ 34.408541] The buggy address is located 88 bytes inside of [ 34.408541] freed 168-byte region [ffff888017e2a740, ffff888017e2a7e8) [ 34.410206] [ 34.410456] The buggy address belongs to the physical page: [ 34.411253] page:000000001e1e92c7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17e2a [ 34.412560] memcg:ffff888019c26101 [ 34.413067] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.413804] page_type: 0xffffffff() [ 34.414343] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.415441] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c26101 [ 34.416537] page dumped because: kasan: bad access detected [ 34.417322] [ 34.417568] Memory state around the buggy address: [ 34.418257] ffff888017e2a680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.419280] ffff888017e2a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 34.420297] >ffff888017e2a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 34.421317] ^ [ 34.421906] ffff888017e2a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 34.422926] ffff888017e2a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 34.423938] ================================================================== [ 34.425286] Disabling lock debugging due to kernel taint [ 36.224610] BUG: Bad rss-counter state mm:00000000abb5eead type:MM_FILEPAGES val:33 [ 36.225671] BUG: Bad rss-counter state mm:00000000abb5eead type:MM_ANONPAGES val:22 [ 36.738502] BUG: Bad rss-counter state mm:000000006c6661c4 type:MM_FILEPAGES val:33 [ 36.739663] BUG: Bad rss-counter state mm:000000006c6661c4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11409' (ECDSA) to the list of known hosts. 2023/06/19 17:34:03 fuzzer started 2023/06/19 17:34:04 dialing manager at localhost:44161 2023/06/19 17:34:04 checking machine... 2023/06/19 17:34:04 checking revisions... [ 37.377733] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:34:04 testing simple program... [ 37.430555] cgroup: Unknown subsys name 'net' [ 37.466948] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:33:59 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88800f582d10 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff81810591 RBP=ffff88806ce09e58 RSP=ffff88806ce09e18 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff88800844f780 R13=0000000000000001 R14=ffffffff813782a8 R15=ffff88800f582d90 RIP=ffffffff81810599 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=00007f5309be85d0 CR3=0000000017fa4000 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=2033303a34333a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a34333a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800f601cc0 RBX=ffff88801c917b40 RCX=0000000000000068 RDX=0000000000000008 RSI=ffff88800f601ae8 RDI=ffff88800f601cc0 RBP=ffff88801c917e70 RSP=ffff88801c917820 R8 =ffff88800f5853a0 R9 =ffff88800f5853a0 R10=000000000000000d R11=ffff888018fc3e80 R12=0000000000000008 R13=ffff88800f601c00 R14=0000000000000040 R15=ffff88801c917b80 RIP=ffffffff844a2462 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 00007f46110c1900 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=00007f4611081008 CR3=0000000015d0a000 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=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