syzkaller login: [ 31.128641] BUG: Bad rss-counter state mm:000000006cf9b572 type:MM_FILEPAGES val:33 [ 31.129729] BUG: Bad rss-counter state mm:000000006cf9b572 type:MM_ANONPAGES val:22 [ 31.334613] ================================================================== [ 31.335638] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.336651] Read of size 8 at addr ffff88801a39d3f8 by task sshd/220 [ 31.337627] [ 31.337865] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.338803] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.339908] Call Trace: [ 31.340263] [ 31.340571] dump_stack_lvl+0x91/0xf0 [ 31.341107] print_report+0xcc/0x620 [ 31.341640] ? __virt_addr_valid+0x102/0x340 [ 31.342232] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.342892] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.343589] kasan_report+0xbe/0xf0 [ 31.344097] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.344760] vma_interval_tree_remove+0xc75/0xec0 [ 31.345407] vma_prepare+0xc54/0x11a0 [ 31.345925] __split_vma+0x5af/0x950 [ 31.346435] ? __pfx___split_vma+0x10/0x10 [ 31.347003] ? find_held_lock+0x2c/0x110 [ 31.347576] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.348190] ? lock_is_held_type+0x9f/0x120 [ 31.348771] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.349429] ? mtree_range_walk+0x632/0x900 [ 31.350024] ? mas_walk+0x5c7/0x7c0 [ 31.350539] do_vmi_munmap+0x1f1/0x2b0 [ 31.351083] mmap_region+0x1f9/0x2660 [ 31.351622] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.352206] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.352984] ? __pfx_lock_acquire+0x10/0x10 [ 31.353554] ? __pfx_mmap_region+0x10/0x10 [ 31.354124] ? security_mmap_addr+0x7d/0xa0 [ 31.354698] ? get_unmapped_area+0x1f5/0x3f0 [ 31.355296] do_mmap+0x854/0xf00 [ 31.355785] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.356330] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.356945] ksys_mmap_pgoff+0x3af/0x500 [ 31.357490] do_syscall_64+0x3f/0x90 [ 31.358017] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.358722] RIP: 0033:0x7f06e1d75d82 [ 31.359218] 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 [ 31.361544] RSP: 002b:00007ffff02c7db8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.362502] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f06e1d75d82 [ 31.363418] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f06e11af000 [ 31.364324] RBP: 00007f06e11af000 R08: 0000000000000009 R09: 0000000000001000 [ 31.365240] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559685aadec0 [ 31.366139] R13: 00007ffff02c7dd0 R14: 00007ffff02c7e00 R15: 00007ffff02c8160 [ 31.367053] [ 31.367382] [ 31.367615] Allocated by task 213: [ 31.368071] kasan_save_stack+0x22/0x50 [ 31.368622] kasan_set_track+0x25/0x30 [ 31.369163] __kasan_slab_alloc+0x59/0x70 [ 31.369725] kmem_cache_alloc+0x16b/0x370 [ 31.370275] vm_area_dup+0x20/0x160 [ 31.370759] __split_vma+0x170/0x950 [ 31.371272] split_vma+0xc6/0x110 [ 31.371747] mprotect_fixup+0x8d2/0xb30 [ 31.372288] do_mprotect_pkey+0x87e/0xd40 [ 31.372854] __x64_sys_mprotect+0x78/0xc0 [ 31.373414] do_syscall_64+0x3f/0x90 [ 31.373922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.374607] [ 31.374835] Freed by task 213: [ 31.375252] kasan_save_stack+0x22/0x50 [ 31.375804] kasan_set_track+0x25/0x30 [ 31.376335] kasan_save_free_info+0x2b/0x50 [ 31.376908] __kasan_slab_free+0x10a/0x190 [ 31.377476] kmem_cache_free+0x10d/0x4d0 [ 31.378034] rcu_core+0x8c8/0x2860 [ 31.378580] __do_softirq+0x1b7/0x7d4 [ 31.379100] [ 31.379332] Last potentially related work creation: [ 31.379979] kasan_save_stack+0x22/0x50 [ 31.380515] __kasan_record_aux_stack+0x8e/0xa0 [ 31.381140] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.381839] remove_vma+0x139/0x170 [ 31.382332] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.382931] do_vmi_munmap+0x1f1/0x2b0 [ 31.383471] __vm_munmap+0x138/0x3a0 [ 31.383982] __x64_sys_munmap+0x59/0x80 [ 31.384519] do_syscall_64+0x3f/0x90 [ 31.385033] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.385717] [ 31.385949] The buggy address belongs to the object at ffff88801a39d3a0 [ 31.385949] which belongs to the cache vm_area_struct of size 168 [ 31.387520] The buggy address is located 88 bytes inside of [ 31.387520] freed 168-byte region [ffff88801a39d3a0, ffff88801a39d448) [ 31.389035] [ 31.389268] The buggy address belongs to the physical page: [ 31.389968] page:00000000c1ff4a76 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a39d [ 31.391138] memcg:ffff888019d80401 [ 31.391608] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.392300] page_type: 0xffffffff() [ 31.392780] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.393757] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d80401 [ 31.394727] page dumped because: kasan: bad access detected [ 31.395448] [ 31.395676] Memory state around the buggy address: [ 31.396294] ffff88801a39d280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.397205] ffff88801a39d300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.398116] >ffff88801a39d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.399027] ^ [ 31.399930] ffff88801a39d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.400839] ffff88801a39d480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.401748] ================================================================== [ 31.402826] Disabling lock debugging due to kernel taint [ 33.532780] BUG: Bad rss-counter state mm:000000008abc1b6a type:MM_FILEPAGES val:33 [ 33.533948] BUG: Bad rss-counter state mm:000000008abc1b6a type:MM_ANONPAGES val:22 [ 33.926324] BUG: Bad rss-counter state mm:000000001d45af1d type:MM_FILEPAGES val:33 [ 33.928050] BUG: Bad rss-counter state mm:000000001d45af1d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20732' (ECDSA) to the list of known hosts. 2023/06/20 11:15:12 fuzzer started 2023/06/20 11:15:12 dialing manager at localhost:36067 2023/06/20 11:15:12 checking machine... 2023/06/20 11:15:12 checking revisions... [ 34.659155] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:15:12 testing simple program... [ 34.703094] cgroup: Unknown subsys name 'net' [ 34.762779] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:15:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888018c353c0 RCX=ffffffff8367462f RDX=ffff888016891b40 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000000 RSP=ffff8880168ff970 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00030009ff02000a R12=ffff888018c35418 R13=ffff8880192bf300 R14=ffff8880168ffa88 R15=00000000000000a4 RIP=ffffffff814c0864 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 00007f60585a2900 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=00007f6058b59618 CR3=000000001bda2000 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=00007f3c0ac35640 CR3=000000000d65c000 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=b11c65e33a28278fb44549e4a470ae3a XMM02=2c67c8bc2e329bc3000000000011a2c0 XMM03=fb795ef6d65770560000000000121800 XMM04=ed3b0afa88c93dad00000000000ae988 XMM05=e4cb8bb95a7664b60000000000131688 XMM06=db2fc27329380ca100000000001304f0 XMM07=e042d86d42eb936e0000000000121a80 XMM08=282d45ecf26a04bd000000000011a320 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000