syzkaller login: [ 43.031477] BUG: Bad rss-counter state mm:00000000e81ea06a type:MM_FILEPAGES val:33 [ 43.032184] BUG: Bad rss-counter state mm:00000000e81ea06a type:MM_ANONPAGES val:22 [ 43.184762] ================================================================== [ 43.185875] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.187013] Read of size 8 at addr ffff888019db6058 by task sshd/219 [ 43.187792] [ 43.188012] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.188877] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.189883] Call Trace: [ 43.190204] [ 43.190497] dump_stack_lvl+0x91/0xf0 [ 43.190988] print_report+0xcc/0x620 [ 43.191465] ? __virt_addr_valid+0x102/0x340 [ 43.192027] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.192643] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.193261] kasan_report+0xbe/0xf0 [ 43.193764] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.194401] vma_interval_tree_remove+0xc75/0xec0 [ 43.195077] vma_prepare+0xc54/0x11a0 [ 43.195633] __split_vma+0x5af/0x950 [ 43.196176] ? __pfx___split_vma+0x10/0x10 [ 43.196786] ? find_held_lock+0x2c/0x110 [ 43.197387] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.198069] ? lock_is_held_type+0x9f/0x120 [ 43.198697] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.199394] ? mtree_range_walk+0x632/0x900 [ 43.200032] ? mas_walk+0x5c7/0x7c0 [ 43.200576] do_vmi_munmap+0x1f1/0x2b0 [ 43.201144] mmap_region+0x1f9/0x2660 [ 43.201717] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.202310] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.203131] ? __pfx_lock_acquire+0x10/0x10 [ 43.203746] ? __pfx_mmap_region+0x10/0x10 [ 43.204356] ? security_mmap_addr+0x7d/0xa0 [ 43.204970] ? get_unmapped_area+0x1f5/0x3f0 [ 43.205621] do_mmap+0x854/0xf00 [ 43.206125] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.206697] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.207323] ksys_mmap_pgoff+0x3af/0x500 [ 43.207898] do_syscall_64+0x3f/0x90 [ 43.208429] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.209147] RIP: 0033:0x7fbccd60dd82 [ 43.209678] 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 [ 43.212048] RSP: 002b:00007fff5db80318 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.213055] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbccd60dd82 [ 43.214012] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbccca47000 [ 43.214954] RBP: 00007fbccca47000 R08: 0000000000000009 R09: 0000000000001000 [ 43.215893] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d26e58cf70 [ 43.216838] R13: 00007fff5db80330 R14: 00007fff5db80360 R15: 00007fff5db806c0 [ 43.217814] [ 43.218135] [ 43.218373] Allocated by task 212: [ 43.218851] kasan_save_stack+0x22/0x50 [ 43.219413] kasan_set_track+0x25/0x30 [ 43.219966] __kasan_slab_alloc+0x59/0x70 [ 43.220553] kmem_cache_alloc+0x16b/0x370 [ 43.221126] vm_area_dup+0x20/0x160 [ 43.221639] __split_vma+0x170/0x950 [ 43.222143] split_vma+0xc6/0x110 [ 43.222609] mprotect_fixup+0x8d2/0xb30 [ 43.223137] do_mprotect_pkey+0x87e/0xd40 [ 43.223694] __x64_sys_mprotect+0x78/0xc0 [ 43.224253] do_syscall_64+0x3f/0x90 [ 43.224764] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.225459] [ 43.225721] Freed by task 212: [ 43.226138] kasan_save_stack+0x22/0x50 [ 43.226678] kasan_set_track+0x25/0x30 [ 43.227207] kasan_save_free_info+0x2b/0x50 [ 43.227777] __kasan_slab_free+0x10a/0x190 [ 43.228359] kmem_cache_free+0x10d/0x4d0 [ 43.228902] rcu_core+0x8c8/0x2860 [ 43.229376] __do_softirq+0x1b7/0x7d4 [ 43.229905] [ 43.230136] Last potentially related work creation: [ 43.230770] kasan_save_stack+0x22/0x50 [ 43.231318] __kasan_record_aux_stack+0x8e/0xa0 [ 43.231956] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.232662] remove_vma+0x139/0x170 [ 43.233151] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.233768] do_vmi_munmap+0x1f1/0x2b0 [ 43.234290] __vm_munmap+0x138/0x3a0 [ 43.234800] __x64_sys_munmap+0x59/0x80 [ 43.235293] do_syscall_64+0x3f/0x90 [ 43.235770] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.236416] [ 43.236630] The buggy address belongs to the object at ffff888019db6000 [ 43.236630] which belongs to the cache vm_area_struct of size 168 [ 43.238134] The buggy address is located 88 bytes inside of [ 43.238134] freed 168-byte region [ffff888019db6000, ffff888019db60a8) [ 43.239548] [ 43.239764] The buggy address belongs to the physical page: [ 43.240433] page:00000000e4636cac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19db6 [ 43.241535] memcg:ffff888019e3ec01 [ 43.241962] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.242603] page_type: 0xffffffff() [ 43.243122] raw: 0100000000000200 ffff88800879fc80 ffffea0000515f80 0000000000000002 [ 43.244187] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e3ec01 [ 43.245214] page dumped because: kasan: bad access detected [ 43.245993] [ 43.246237] Memory state around the buggy address: [ 43.246901] ffff888019db5f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 43.247889] ffff888019db5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 43.248841] >ffff888019db6000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.249801] ^ [ 43.250634] ffff888019db6080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 43.251644] ffff888019db6100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.252575] ================================================================== [ 43.253772] Disabling lock debugging due to kernel taint [ 45.493126] BUG: Bad rss-counter state mm:00000000c9672655 type:MM_FILEPAGES val:33 [ 45.494641] BUG: Bad rss-counter state mm:00000000c9672655 type:MM_ANONPAGES val:22 [ 45.998626] BUG: Bad rss-counter state mm:000000000c0c91d7 type:MM_FILEPAGES val:33 [ 45.999740] BUG: Bad rss-counter state mm:000000000c0c91d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63947' (ECDSA) to the list of known hosts. 2023/06/20 06:06:59 fuzzer started 2023/06/20 06:07:00 dialing manager at localhost:44161 2023/06/20 06:07:00 checking machine... 2023/06/20 06:07:00 checking revisions... [ 46.747327] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:07:00 testing simple program... [ 46.789714] cgroup: Unknown subsys name 'net' [ 46.866388] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:06:46 Registers: info registers vcpu 0 RAX=0100000000010200 RBX=0000000000000000 RCX=ffffea0000664800 RDX=ffffea0000664801 RSI=ffff888019921a40 RDI=ffff888000000000 RBP=ffffffff818d9dc6 RSP=ffff888016837d38 R8 =ffffea0000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6cb2 R12=ffff888019921a40 R13=ffff8880087c7280 R14=ffffffff818d9dc6 R15=ffff88800d071a00 RIP=ffffffff8180c83b RFL=00000202 [-------] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6081419900 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=00007f60819ce650 CR3=000000000d7bc000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=0000000000000000000000000000ff00 XMM02=00000000000000000000000000000000 XMM03=00303030303609090958414d5f444955 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=000000000000000000ffffffffffffff XMM08=7365756c61762078616d2f6e694d2023 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fff68f72638 CR3=0000000005482000 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=00007f7aa5c5451000005649be362790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000