syzkaller login: [ 30.971333] BUG: Bad rss-counter state mm:00000000ab417a66 type:MM_FILEPAGES val:33 [ 30.972727] BUG: Bad rss-counter state mm:00000000ab417a66 type:MM_ANONPAGES val:22 [ 31.099919] ================================================================== [ 31.100563] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.101205] Read of size 8 at addr ffff8880166c23f8 by task sshd/221 [ 31.101730] [ 31.101881] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.102531] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.103207] Call Trace: [ 31.103461] [ 31.103664] dump_stack_lvl+0x91/0xf0 [ 31.104004] print_report+0xcc/0x620 [ 31.104510] ? __virt_addr_valid+0x102/0x340 [ 31.104881] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.105348] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.105778] kasan_report+0xbe/0xf0 [ 31.106104] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.106598] vma_interval_tree_remove+0xc75/0xec0 [ 31.107015] vma_prepare+0xc54/0x11a0 [ 31.107363] __split_vma+0x5af/0x950 [ 31.107698] ? __pfx___split_vma+0x10/0x10 [ 31.108054] ? find_held_lock+0x2c/0x110 [ 31.108413] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.108804] ? lock_is_held_type+0x9f/0x120 [ 31.109181] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.109598] ? mtree_range_walk+0x632/0x900 [ 31.109990] ? mas_walk+0x5c7/0x7c0 [ 31.110369] do_vmi_munmap+0x1f1/0x2b0 [ 31.110711] mmap_region+0x1f9/0x2660 [ 31.111049] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.111426] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.111941] ? __pfx_lock_acquire+0x10/0x10 [ 31.112308] ? __pfx_mmap_region+0x10/0x10 [ 31.112690] ? security_mmap_addr+0x7d/0xa0 [ 31.113040] ? get_unmapped_area+0x1f5/0x3f0 [ 31.113426] do_mmap+0x854/0xf00 [ 31.113729] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.114068] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.114554] ksys_mmap_pgoff+0x3af/0x500 [ 31.114901] do_syscall_64+0x3f/0x90 [ 31.115240] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.115704] RIP: 0033:0x7ff4fa7ced82 [ 31.116024] 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 [ 31.117543] RSP: 002b:00007ffd42b4f938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.118234] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff4fa7ced82 [ 31.118812] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff4f9c08000 [ 31.119437] RBP: 00007ff4f9c08000 R08: 0000000000000009 R09: 0000000000001000 [ 31.120029] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bc23bd4d90 [ 31.120640] R13: 00007ffd42b4f950 R14: 00007ffd42b4f980 R15: 00007ffd42b4fce0 [ 31.121238] [ 31.121446] [ 31.121595] Allocated by task 214: [ 31.121901] kasan_save_stack+0x22/0x50 [ 31.122273] kasan_set_track+0x25/0x30 [ 31.122657] __kasan_slab_alloc+0x59/0x70 [ 31.123013] kmem_cache_alloc+0x16b/0x370 [ 31.123352] vm_area_dup+0x20/0x160 [ 31.123659] __split_vma+0x170/0x950 [ 31.123990] split_vma+0xc6/0x110 [ 31.124294] mprotect_fixup+0x8d2/0xb30 [ 31.124653] do_mprotect_pkey+0x87e/0xd40 [ 31.125028] __x64_sys_mprotect+0x78/0xc0 [ 31.125396] do_syscall_64+0x3f/0x90 [ 31.125723] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.126222] [ 31.126374] Freed by task 214: [ 31.126645] kasan_save_stack+0x22/0x50 [ 31.126980] kasan_set_track+0x25/0x30 [ 31.127325] kasan_save_free_info+0x2b/0x50 [ 31.127692] __kasan_slab_free+0x10a/0x190 [ 31.128061] kmem_cache_free+0x10d/0x4d0 [ 31.128429] rcu_core+0x8c8/0x2860 [ 31.128742] __do_softirq+0x1b7/0x7d4 [ 31.129072] [ 31.129216] Last potentially related work creation: [ 31.129622] kasan_save_stack+0x22/0x50 [ 31.129952] __kasan_record_aux_stack+0x8e/0xa0 [ 31.130366] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.130785] remove_vma+0x139/0x170 [ 31.131088] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.131479] do_vmi_munmap+0x1f1/0x2b0 [ 31.131825] __vm_munmap+0x138/0x3a0 [ 31.132143] __x64_sys_munmap+0x59/0x80 [ 31.132470] do_syscall_64+0x3f/0x90 [ 31.132780] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.133222] [ 31.133373] The buggy address belongs to the object at ffff8880166c23a0 [ 31.133373] which belongs to the cache vm_area_struct of size 168 [ 31.134439] The buggy address is located 88 bytes inside of [ 31.134439] freed 168-byte region [ffff8880166c23a0, ffff8880166c2448) [ 31.135382] [ 31.135531] The buggy address belongs to the physical page: [ 31.135977] page:000000007cf5979c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x166c2 [ 31.136705] memcg:ffff88800c733801 [ 31.137011] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.137446] page_type: 0xffffffff() [ 31.137747] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 31.138397] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c733801 [ 31.139009] page dumped because: kasan: bad access detected [ 31.139464] [ 31.139607] Memory state around the buggy address: [ 31.139997] ffff8880166c2280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.140582] ffff8880166c2300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.141138] >ffff8880166c2380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.141705] ^ [ 31.142320] ffff8880166c2400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.142907] ffff8880166c2480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.143472] ================================================================== [ 31.144180] Disabling lock debugging due to kernel taint [ 32.562546] BUG: Bad rss-counter state mm:000000001bd97a85 type:MM_FILEPAGES val:33 [ 32.563233] BUG: Bad rss-counter state mm:000000001bd97a85 type:MM_ANONPAGES val:22 [ 32.973622] BUG: Bad rss-counter state mm:000000002f9afdca type:MM_FILEPAGES val:33 [ 32.974310] BUG: Bad rss-counter state mm:000000002f9afdca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20791' (ECDSA) to the list of known hosts. 2023/06/20 08:57:05 fuzzer started 2023/06/20 08:57:05 dialing manager at localhost:44161 2023/06/20 08:57:05 checking machine... 2023/06/20 08:57:05 checking revisions... [ 33.489978] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:57:05 testing simple program... [ 33.532953] cgroup: Unknown subsys name 'net' [ 33.573748] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:57:05 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888006813680 RSI=ffffffff81ef7b48 RDI=ffffffff87f400f0 RBP=0000000000000001 RSP=ffff888019aaf7d8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88800e370bc8 R13=0000000000000008 R14=000000000000004c R15=0000000000000001 RIP=ffffffff81ef7b63 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 00007ff968744900 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=000055ada7273818 CR3=000000000effa000 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=ff0000000000ffff0000000000ff0000 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=0000000000000003 RBX=00000000a7fbe36a RCX=ffff88806c9f1b50 RDX=0000000000000011 RSI=ffffffff81807ebb RDI=0000000071fd02bd RBP=ffff88800c78f7d0 RSP=ffff8880165375f8 R8 =00000000bfe62aba R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000d40 R14=ffff888016537660 R15=0000000000000011 RIP=ffffffff82270f3c RFL=00000212 [----A--] 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 00007fcb7aad0700 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=00007fc831e2ee00 CR3=000000000ec5e000 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=2035303a37353a3830203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a37353a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000