syzkaller login: [ 30.115983] BUG: Bad rss-counter state mm:0000000062af722b type:MM_FILEPAGES val:33 [ 30.116627] BUG: Bad rss-counter state mm:0000000062af722b type:MM_ANONPAGES val:22 [ 30.341038] ================================================================== [ 30.341687] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.342395] Read of size 8 at addr ffff88800db9e228 by task sshd/220 [ 30.343651] [ 30.343811] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.344453] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.345180] Call Trace: [ 30.345415] [ 30.345614] dump_stack_lvl+0x91/0xf0 [ 30.346007] print_report+0xcc/0x620 [ 30.346349] ? __virt_addr_valid+0x102/0x340 [ 30.346746] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.347297] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.347725] kasan_report+0xbe/0xf0 [ 30.348111] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.348557] vma_interval_tree_remove+0xc75/0xec0 [ 30.352578] vma_prepare+0xc54/0x11a0 [ 30.352971] __split_vma+0x5af/0x950 [ 30.353303] ? __pfx___split_vma+0x10/0x10 [ 30.353675] ? find_held_lock+0x2c/0x110 [ 30.354305] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.354705] ? lock_is_held_type+0x9f/0x120 [ 30.355182] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.355602] ? mtree_range_walk+0x632/0x900 [ 30.359331] ? mas_walk+0x5c7/0x7c0 [ 30.359669] do_vmi_munmap+0x1f1/0x2b0 [ 30.360021] mmap_region+0x1f9/0x2660 [ 30.360345] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.360699] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.361218] ? __pfx_lock_acquire+0x10/0x10 [ 30.361586] ? __pfx_mmap_region+0x10/0x10 [ 30.361952] ? security_mmap_addr+0x7d/0xa0 [ 30.362325] ? get_unmapped_area+0x1f5/0x3f0 [ 30.362701] do_mmap+0x854/0xf00 [ 30.363006] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.363399] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.363780] ksys_mmap_pgoff+0x3af/0x500 [ 30.364133] do_syscall_64+0x3f/0x90 [ 30.364469] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.364925] RIP: 0033:0x7f1cddf6bd82 [ 30.365245] 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 [ 30.366723] RSP: 002b:00007fff216787d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.367404] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1cddf6bd82 [ 30.367990] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1cdd3a5000 [ 30.368585] RBP: 00007f1cdd3a5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.369181] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562eff8fcb20 [ 30.369772] R13: 00007fff216787f0 R14: 00007fff21678820 R15: 00007fff21678b80 [ 30.370371] [ 30.370574] [ 30.370726] Allocated by task 211: [ 30.371023] kasan_save_stack+0x22/0x50 [ 30.371403] kasan_set_track+0x25/0x30 [ 30.371755] __kasan_slab_alloc+0x59/0x70 [ 30.372127] kmem_cache_alloc+0x16b/0x370 [ 30.372489] vm_area_dup+0x20/0x160 [ 30.372819] __split_vma+0x170/0x950 [ 30.373157] split_vma+0xc6/0x110 [ 30.373490] mprotect_fixup+0x8d2/0xb30 [ 30.373842] do_mprotect_pkey+0x87e/0xd40 [ 30.374220] __x64_sys_mprotect+0x78/0xc0 [ 30.374590] do_syscall_64+0x3f/0x90 [ 30.374930] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.375417] [ 30.375573] Freed by task 211: [ 30.375851] kasan_save_stack+0x22/0x50 [ 30.376207] kasan_set_track+0x25/0x30 [ 30.376563] kasan_save_free_info+0x2b/0x50 [ 30.376942] __kasan_slab_free+0x10a/0x190 [ 30.377324] kmem_cache_free+0x10d/0x4d0 [ 30.377681] rcu_core+0x8c8/0x2860 [ 30.377998] __do_softirq+0x1b7/0x7d4 [ 30.378338] [ 30.378497] Last potentially related work creation: [ 30.378904] kasan_save_stack+0x22/0x50 [ 30.379313] __kasan_record_aux_stack+0x8e/0xa0 [ 30.379725] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.380177] remove_vma+0x139/0x170 [ 30.380500] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.380888] do_vmi_munmap+0x1f1/0x2b0 [ 30.381231] __vm_munmap+0x138/0x3a0 [ 30.381561] __x64_sys_munmap+0x59/0x80 [ 30.381902] do_syscall_64+0x3f/0x90 [ 30.382228] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.382676] [ 30.382829] Second to last potentially related work creation: [ 30.383333] kasan_save_stack+0x22/0x50 [ 30.383696] __kasan_record_aux_stack+0x8e/0xa0 [ 30.384095] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.384497] remove_vma+0x139/0x170 [ 30.384787] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.385155] do_vmi_munmap+0x1f1/0x2b0 [ 30.385482] mmap_region+0x1f9/0x2660 [ 30.385949] do_mmap+0x854/0xf00 [ 30.386563] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.387361] ksys_mmap_pgoff+0x3af/0x500 [ 30.390687] do_syscall_64+0x3f/0x90 [ 30.391467] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.392272] [ 30.392424] The buggy address belongs to the object at ffff88800db9e1d0 [ 30.392424] which belongs to the cache vm_area_struct of size 168 [ 30.393352] The buggy address is located 88 bytes inside of [ 30.393352] freed 168-byte region [ffff88800db9e1d0, ffff88800db9e278) [ 30.394236] [ 30.394379] The buggy address belongs to the physical page: [ 30.394920] page:000000001513173f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb9e [ 30.395653] memcg:ffff88800db50e01 [ 30.395924] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.396309] page_type: 0xffffffff() [ 30.396582] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.397129] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db50e01 [ 30.397656] page dumped because: kasan: bad access detected [ 30.398043] [ 30.398172] Memory state around the buggy address: [ 30.398518] ffff88800db9e100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.399181] ffff88800db9e180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.399713] >ffff88800db9e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.400240] ^ [ 30.400580] ffff88800db9e280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.401098] ffff88800db9e300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.401621] ================================================================== [ 30.402410] Disabling lock debugging due to kernel taint [ 32.636997] BUG: Bad rss-counter state mm:000000004d09a21e type:MM_FILEPAGES val:33 [ 32.637673] BUG: Bad rss-counter state mm:000000004d09a21e type:MM_ANONPAGES val:22 [ 33.254635] BUG: Bad rss-counter state mm:00000000419e7e18 type:MM_FILEPAGES val:33 [ 33.255604] BUG: Bad rss-counter state mm:00000000419e7e18 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33168' (ECDSA) to the list of known hosts. 2023/06/21 10:08:50 fuzzer started 2023/06/21 10:08:50 dialing manager at localhost:36067 2023/06/21 10:08:50 checking machine... 2023/06/21 10:08:50 checking revisions... [ 34.141562] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:08:50 testing simple program... [ 34.188927] cgroup: Unknown subsys name 'net' [ 34.249445] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:08:50 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce3a360 RCX=ffffffff81378b05 RDX=ffff88806ce3a360 RSI=ffff888008d9fdc8 RDI=ffff888008d9fdd0 RBP=ffff88801c5d9410 RSP=ffff888008d9fd18 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=ffff88801bc8d5c0 R13=ffff888008d9fdc8 R14=ffff88806ce3a360 R15=0000000000000200 RIP=ffffffff81381183 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=00007fdb84910328 CR3=000000001bc10000 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=0000000000000001 RBX=0000000000000001 RCX=ffffffff815342db RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff84511f81 RSP=ffff88801c5c7f00 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000070 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8135b935 RFL=00000047 [---Z-PC] 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 00007f1114d58900 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=00007ffd1d44def9 CR3=0000000018ddc000 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=ff0000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000