syzkaller login: [ 31.049103] BUG: Bad rss-counter state mm:00000000317001e3 type:MM_FILEPAGES val:33 [ 31.050596] BUG: Bad rss-counter state mm:00000000317001e3 type:MM_ANONPAGES val:22 [ 31.217757] ================================================================== [ 31.218746] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.219751] Read of size 8 at addr ffff888019c97ed8 by task sshd/221 [ 31.220644] [ 31.220885] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.221798] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.222843] Call Trace: [ 31.223186] [ 31.223491] dump_stack_lvl+0x91/0xf0 [ 31.224017] print_report+0xcc/0x620 [ 31.224536] ? __virt_addr_valid+0x102/0x340 [ 31.225133] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.225793] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.226450] kasan_report+0xbe/0xf0 [ 31.226969] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.227646] vma_interval_tree_remove+0xc75/0xec0 [ 31.228302] vma_prepare+0xc54/0x11a0 [ 31.228846] __split_vma+0x5af/0x950 [ 31.229364] ? __pfx___split_vma+0x10/0x10 [ 31.229938] ? find_held_lock+0x2c/0x110 [ 31.230497] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.231102] ? lock_is_held_type+0x9f/0x120 [ 31.231693] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.232352] ? mtree_range_walk+0x632/0x900 [ 31.232961] ? mas_walk+0x5c7/0x7c0 [ 31.233472] do_vmi_munmap+0x1f1/0x2b0 [ 31.234006] mmap_region+0x1f9/0x2660 [ 31.234534] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.235090] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.235859] ? __pfx_lock_acquire+0x10/0x10 [ 31.236441] ? __pfx_mmap_region+0x10/0x10 [ 31.237028] ? security_mmap_addr+0x7d/0xa0 [ 31.237607] ? get_unmapped_area+0x1f5/0x3f0 [ 31.238202] do_mmap+0x854/0xf00 [ 31.238680] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.239220] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.239833] ksys_mmap_pgoff+0x3af/0x500 [ 31.240379] do_syscall_64+0x3f/0x90 [ 31.240902] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.241602] RIP: 0033:0x7f9979c3fd82 [ 31.242098] 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 [ 31.244398] RSP: 002b:00007ffc0823f218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.245368] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9979c3fd82 [ 31.246291] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9979079000 [ 31.247207] RBP: 00007f9979079000 R08: 0000000000000009 R09: 0000000000001000 [ 31.248123] R10: 0000000000000812 R11: 0000000000000206 R12: 00005651cd7ca980 [ 31.249053] R13: 00007ffc0823f230 R14: 00007ffc0823f260 R15: 00007ffc0823f5c0 [ 31.249988] [ 31.250307] [ 31.250542] Allocated by task 214: [ 31.251008] kasan_save_stack+0x22/0x50 [ 31.251546] kasan_set_track+0x25/0x30 [ 31.252080] __kasan_slab_alloc+0x59/0x70 [ 31.252650] kmem_cache_alloc+0x16b/0x370 [ 31.253213] vm_area_dup+0x20/0x160 [ 31.253707] __split_vma+0x170/0x950 [ 31.254215] split_vma+0xc6/0x110 [ 31.254694] mprotect_fixup+0x8d2/0xb30 [ 31.255235] do_mprotect_pkey+0x87e/0xd40 [ 31.255798] __x64_sys_mprotect+0x78/0xc0 [ 31.256360] do_syscall_64+0x3f/0x90 [ 31.256876] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.257560] [ 31.257795] Freed by task 214: [ 31.258207] kasan_save_stack+0x22/0x50 [ 31.258752] kasan_set_track+0x25/0x30 [ 31.259288] kasan_save_free_info+0x2b/0x50 [ 31.259859] __kasan_slab_free+0x10a/0x190 [ 31.260431] kmem_cache_free+0x10d/0x4d0 [ 31.260991] rcu_core+0x8c8/0x2860 [ 31.261470] __do_softirq+0x1b7/0x7d4 [ 31.261990] [ 31.262220] Last potentially related work creation: [ 31.262851] kasan_save_stack+0x22/0x50 [ 31.263393] __kasan_record_aux_stack+0x8e/0xa0 [ 31.264009] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.264710] remove_vma+0x139/0x170 [ 31.265196] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.265800] do_vmi_munmap+0x1f1/0x2b0 [ 31.266327] __vm_munmap+0x138/0x3a0 [ 31.266835] __x64_sys_munmap+0x59/0x80 [ 31.267376] do_syscall_64+0x3f/0x90 [ 31.267888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.268577] [ 31.268820] The buggy address belongs to the object at ffff888019c97e80 [ 31.268820] which belongs to the cache vm_area_struct of size 168 [ 31.270404] The buggy address is located 88 bytes inside of [ 31.270404] freed 168-byte region [ffff888019c97e80, ffff888019c97f28) [ 31.271913] [ 31.272145] The buggy address belongs to the physical page: [ 31.272875] page:0000000043656282 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c97 [ 31.274051] memcg:ffff888019c90201 [ 31.274515] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.275274] page_type: 0xffffffff() [ 31.275766] raw: 0100000000000200 ffff8880087a0c80 ffffea000064ee40 dead000000000003 [ 31.276773] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c90201 [ 31.277764] page dumped because: kasan: bad access detected [ 31.278469] [ 31.278702] Memory state around the buggy address: [ 31.279332] ffff888019c97d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.280252] ffff888019c97e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.281186] >ffff888019c97e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.282094] ^ [ 31.282878] ffff888019c97f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.283803] ffff888019c97f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.284721] ================================================================== [ 31.285767] Disabling lock debugging due to kernel taint [ 33.097888] BUG: Bad rss-counter state mm:000000008859ffbe type:MM_FILEPAGES val:33 [ 33.098999] BUG: Bad rss-counter state mm:000000008859ffbe type:MM_ANONPAGES val:22 [ 33.646248] BUG: Bad rss-counter state mm:00000000fbd55c0b type:MM_FILEPAGES val:33 [ 33.647445] BUG: Bad rss-counter state mm:00000000fbd55c0b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46433' (ECDSA) to the list of known hosts. 2023/06/21 08:34:38 fuzzer started 2023/06/21 08:34:38 dialing manager at localhost:36067 2023/06/21 08:34:38 checking machine... 2023/06/21 08:34:38 checking revisions... [ 34.280285] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:34:38 testing simple program... [ 34.322596] cgroup: Unknown subsys name 'net' [ 34.378300] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:34:38 Registers: info registers vcpu 0 RAX=ffff8880133d8001 RBX=ffffffff85d3e48c RCX=ffffffff812be3aa RDX=1ffff11001ce570f RSI=0000000000000008 RDI=ffff88800e72b878 RBP=ffff88800e72b870 RSP=ffff88801025fe28 R8 =0000000000000000 R9 =ffffed1001ce570f R10=ffff88800e72b87f R11=0000000000000000 R12=1ffff1100204bfc8 R13=ffff8880133d8001 R14=ffff8880133d8000 R15=ffff88800e72b878 RIP=ffffffff812be3dc 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fdc0fd4a900 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=000055c3f390b644 CR3=000000000eb4e000 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=0000000000000000000055c3f1ad6060 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=0000000000000001 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=00007ffd428f8fc8 CR3=000000001648c000 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=2037333a34333a3830203132206e754a XMM01=657463656e6e6f63736944203a5d3333 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3333325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a34333a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000