syzkaller login: [ 30.742676] BUG: Bad rss-counter state mm:000000006ab5310a type:MM_FILEPAGES val:33 [ 30.744118] BUG: Bad rss-counter state mm:000000006ab5310a type:MM_ANONPAGES val:22 [ 30.884965] ================================================================== [ 30.886082] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.887308] Read of size 8 at addr ffff88800fd37140 by task sshd/220 [ 30.888180] [ 30.888403] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.889272] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.890288] Call Trace: [ 30.890613] [ 30.890896] dump_stack_lvl+0x91/0xf0 [ 30.891392] print_report+0xcc/0x620 [ 30.891888] ? __virt_addr_valid+0x102/0x340 [ 30.892451] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.893071] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.893704] kasan_report+0xbe/0xf0 [ 30.894190] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.894810] vma_interval_tree_remove+0xc75/0xec0 [ 30.895410] vma_prepare+0xc54/0x11a0 [ 30.895914] __split_vma+0x5af/0x950 [ 30.896392] ? __pfx___split_vma+0x10/0x10 [ 30.896926] ? find_held_lock+0x2c/0x110 [ 30.897449] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.898014] ? lock_is_held_type+0x9f/0x120 [ 30.898564] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.899175] ? mtree_range_walk+0x632/0x900 [ 30.899728] ? mas_walk+0x5c7/0x7c0 [ 30.900213] do_vmi_munmap+0x1f1/0x2b0 [ 30.900708] mmap_region+0x1f9/0x2660 [ 30.901190] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.901706] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.902426] ? __pfx_lock_acquire+0x10/0x10 [ 30.902954] ? __pfx_mmap_region+0x10/0x10 [ 30.903484] ? security_mmap_addr+0x7d/0xa0 [ 30.904043] ? get_unmapped_area+0x1f5/0x3f0 [ 30.904598] do_mmap+0x854/0xf00 [ 30.905045] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.905542] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.906118] ksys_mmap_pgoff+0x3af/0x500 [ 30.906630] do_syscall_64+0x3f/0x90 [ 30.907107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.907772] RIP: 0033:0x7f7b88c63d82 [ 30.908234] 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 [ 30.910383] RSP: 002b:00007ffee55a3968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.911316] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7b88c63d82 [ 30.912196] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7b8809d000 [ 30.913056] RBP: 00007f7b8809d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.913906] R10: 0000000000000812 R11: 0000000000000206 R12: 00005635e9092ec0 [ 30.914768] R13: 00007ffee55a3980 R14: 00007ffee55a39b0 R15: 00007ffee55a3d10 [ 30.915639] [ 30.915961] [ 30.916179] Allocated by task 213: [ 30.916610] kasan_save_stack+0x22/0x50 [ 30.917118] kasan_set_track+0x25/0x30 [ 30.917609] __kasan_slab_alloc+0x59/0x70 [ 30.918136] kmem_cache_alloc+0x16b/0x370 [ 30.918654] vm_area_dup+0x20/0x160 [ 30.919115] __split_vma+0x170/0x950 [ 30.919580] split_vma+0xc6/0x110 [ 30.920030] mprotect_fixup+0x8d2/0xb30 [ 30.920534] do_mprotect_pkey+0x87e/0xd40 [ 30.921063] __x64_sys_mprotect+0x78/0xc0 [ 30.921590] do_syscall_64+0x3f/0x90 [ 30.922069] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.922715] [ 30.922929] Freed by task 213: [ 30.923323] kasan_save_stack+0x22/0x50 [ 30.923831] kasan_set_track+0x25/0x30 [ 30.924326] kasan_save_free_info+0x2b/0x50 [ 30.924858] __kasan_slab_free+0x10a/0x190 [ 30.925397] kmem_cache_free+0x10d/0x4d0 [ 30.925905] rcu_core+0x8c8/0x2860 [ 30.926349] __do_softirq+0x1b7/0x7d4 [ 30.926824] [ 30.927038] Last potentially related work creation: [ 30.927631] kasan_save_stack+0x22/0x50 [ 30.928235] __kasan_record_aux_stack+0x8e/0xa0 [ 30.928808] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.929448] remove_vma+0x139/0x170 [ 30.929900] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.930455] do_vmi_munmap+0x1f1/0x2b0 [ 30.930941] __vm_munmap+0x138/0x3a0 [ 30.931415] __x64_sys_munmap+0x59/0x80 [ 30.931924] do_syscall_64+0x3f/0x90 [ 30.932401] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.933055] [ 30.933270] The buggy address belongs to the object at ffff88800fd370e8 [ 30.933270] which belongs to the cache vm_area_struct of size 168 [ 30.934741] The buggy address is located 88 bytes inside of [ 30.934741] freed 168-byte region [ffff88800fd370e8, ffff88800fd37190) [ 30.936154] [ 30.936370] The buggy address belongs to the physical page: [ 30.937029] page:00000000064da9ea refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd37 [ 30.938127] memcg:ffff8880166e0a01 [ 30.938554] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.939205] page_type: 0xffffffff() [ 30.939662] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.940613] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880166e0a01 [ 30.941530] page dumped because: kasan: bad access detected [ 30.942197] [ 30.942413] Memory state around the buggy address: [ 30.942990] ffff88800fd37000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.943861] ffff88800fd37080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.944722] >ffff88800fd37100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.945580] ^ [ 30.946226] ffff88800fd37180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.947079] ffff88800fd37200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.947941] ================================================================== [ 30.948861] Disabling lock debugging due to kernel taint [ 33.512561] BUG: Bad rss-counter state mm:000000005308978e type:MM_FILEPAGES val:33 [ 33.513488] BUG: Bad rss-counter state mm:000000005308978e type:MM_ANONPAGES val:22 [ 34.102775] BUG: Bad rss-counter state mm:000000001a9f4621 type:MM_FILEPAGES val:33 [ 34.103993] BUG: Bad rss-counter state mm:000000001a9f4621 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10131' (ECDSA) to the list of known hosts. 2023/06/20 18:00:46 fuzzer started 2023/06/20 18:00:46 dialing manager at localhost:36067 2023/06/20 18:00:46 checking machine... 2023/06/20 18:00:46 checking revisions... [ 34.727987] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:00:47 testing simple program... [ 34.765198] cgroup: Unknown subsys name 'net' [ 34.809206] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:00:46 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff8180c705 RCX=ffffffff86138e01 RDX=1ffff11001e32f3c RSI=0000000000000000 RDI=ffffffff8180c705 RBP=ffffffff8180c705 RSP=ffff88800f197930 R8 =ffffffff86138e90 R9 =ffff88800f1979c8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88800f197a50 R13=0000000000000000 R14=ffff8880158a3680 R15=0000000000000cc0 RIP=ffffffff811fc6f7 RFL=00000296 [--S-AP-] 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 00007ff10b610900 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=00007ff10aa76320 CR3=0000000008c62000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=9da9c261b5d2cfd800000000000ae988 XMM05=2ad9b570555667ae0000000000133008 XMM06=47a3486c5dcd443e0000000000131da8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800972cac0 RCX=ffffea0000000000 RDX=ffff888008441500 RSI=0000000000000000 RDI=ffff888008441500 RBP=ffff888008e37c78 RSP=ffff888008e37c50 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=ffff888008441500 R13=ffffea000025cb00 R14=ffffffff81ef57e8 R15=ffff88800fedb6c0 RIP=ffffffff8180b2cb 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 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=00007ffeec8ab000 CR3=000000000cc0a000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=0000006f730074696d7265705f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000