[ 25.859484] BUG: Bad rss-counter state mm:0000000096a5edad type:MM_FILEPAGES val:33 [ 25.860669] BUG: Bad rss-counter state mm:0000000096a5edad type:MM_ANONPAGES val:22 [ 25.896636] ================================================================== [ 25.897656] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.898636] Read of size 8 at addr ffff88800e0e3c20 by task sshd/219 [ 25.899602] [ 25.899904] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.900852] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.901826] Call Trace: [ 25.902148] [ 25.902453] dump_stack_lvl+0x91/0xf0 [ 25.902953] print_report+0xcc/0x620 [ 25.903466] ? __virt_addr_valid+0x102/0x340 [ 25.904023] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.904652] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.905276] kasan_report+0xbe/0xf0 [ 25.905765] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.906405] vma_interval_tree_remove+0xc75/0xec0 [ 25.907035] vma_prepare+0xc54/0x11a0 [ 25.907777] __split_vma+0x5af/0x950 [ 25.908253] ? __pfx___split_vma+0x10/0x10 [ 25.908799] ? find_held_lock+0x2c/0x110 [ 25.909320] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.909917] ? lock_is_held_type+0x9f/0x120 [ 25.910477] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.911088] ? mtree_range_walk+0x632/0x900 [ 25.911685] ? mas_walk+0x5c7/0x7c0 [ 25.912160] do_vmi_munmap+0x1f1/0x2b0 [ 25.912665] mmap_region+0x1f9/0x2660 [ 25.913144] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.913677] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.914392] ? __pfx_lock_acquire+0x10/0x10 [ 25.914934] ? __pfx_mmap_region+0x10/0x10 [ 25.915511] ? security_mmap_addr+0x7d/0xa0 [ 25.916041] ? get_unmapped_area+0x1f5/0x3f0 [ 25.916602] do_mmap+0x854/0xf00 [ 25.917044] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.917550] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.918117] ksys_mmap_pgoff+0x3af/0x500 [ 25.918635] do_syscall_64+0x3f/0x90 [ 25.919113] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.919811] RIP: 0033:0x7fdf28d6bd82 [ 25.920269] 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 [ 25.922452] RSP: 002b:00007ffcb439cc88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.923366] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdf28d6bd82 [ 25.924243] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdf281a5000 [ 25.925115] RBP: 00007fdf281a5000 R08: 0000000000000009 R09: 0000000000001000 [ 25.925982] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558185146ec0 [ 25.926844] R13: 00007ffcb439cca0 R14: 00007ffcb439ccd0 R15: 00007ffcb439d030 [ 25.927738] [ 25.928037] [ 25.928255] Allocated by task 212: [ 25.928690] kasan_save_stack+0x22/0x50 [ 25.929198] kasan_set_track+0x25/0x30 [ 25.929696] __kasan_slab_alloc+0x59/0x70 [ 25.930220] kmem_cache_alloc+0x16b/0x370 [ 25.930744] vm_area_dup+0x20/0x160 [ 25.931201] __split_vma+0x170/0x950 [ 25.931691] split_vma+0xc6/0x110 [ 25.932135] mprotect_fixup+0x8d2/0xb30 [ 25.932634] do_mprotect_pkey+0x87e/0xd40 [ 25.933163] __x64_sys_mprotect+0x78/0xc0 [ 25.933690] do_syscall_64+0x3f/0x90 [ 25.934169] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.934808] [ 25.935022] Freed by task 212: [ 25.935423] kasan_save_stack+0x22/0x50 [ 25.935929] kasan_set_track+0x25/0x30 [ 25.936426] kasan_save_free_info+0x2b/0x50 [ 25.936965] __kasan_slab_free+0x10a/0x190 [ 25.937505] kmem_cache_free+0x10d/0x4d0 [ 25.938008] rcu_core+0x8c8/0x2860 [ 25.938455] __do_softirq+0x1b7/0x7d4 [ 25.938942] [ 25.939159] Last potentially related work creation: [ 25.939771] kasan_save_stack+0x22/0x50 [ 25.940272] __kasan_record_aux_stack+0x8e/0xa0 [ 25.940842] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.941486] remove_vma+0x139/0x170 [ 25.941942] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.942494] do_vmi_munmap+0x1f1/0x2b0 [ 25.942976] __vm_munmap+0x138/0x3a0 [ 25.943451] __x64_sys_munmap+0x59/0x80 [ 25.943964] do_syscall_64+0x3f/0x90 [ 25.944453] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.945108] [ 25.945320] Second to last potentially related work creation: [ 25.946022] kasan_save_stack+0x22/0x50 [ 25.946543] __kasan_record_aux_stack+0x8e/0xa0 [ 25.947130] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.947797] remove_vma+0x139/0x170 [ 25.948257] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.948898] do_vmi_munmap+0x1f1/0x2b0 [ 25.949395] mmap_region+0x1f9/0x2660 [ 25.949888] do_mmap+0x854/0xf00 [ 25.950326] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.950821] ksys_mmap_pgoff+0x3af/0x500 [ 25.951340] do_syscall_64+0x3f/0x90 [ 25.951842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.952501] [ 25.952723] The buggy address belongs to the object at ffff88800e0e3bc8 [ 25.952723] which belongs to the cache vm_area_struct of size 168 [ 25.954221] The buggy address is located 88 bytes inside of [ 25.954221] freed 168-byte region [ffff88800e0e3bc8, ffff88800e0e3c70) [ 25.955647] [ 25.955867] The buggy address belongs to the physical page: [ 25.956528] page:0000000000a34ab3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0e3 [ 25.957622] memcg:ffff88800e498201 [ 25.958067] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.958723] page_type: 0xffffffff() [ 25.959181] raw: 0100000000000200 ffff88800879fc80 ffffea000025ac80 dead000000000004 [ 25.960127] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e498201 [ 25.961054] page dumped because: kasan: bad access detected [ 25.961729] [ 25.961945] Memory state around the buggy address: [ 25.962557] ffff88800e0e3b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.963444] ffff88800e0e3b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 25.964329] >ffff88800e0e3c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 25.965200] ^ [ 25.965739] ffff88800e0e3c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 25.966610] ffff88800e0e3d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 25.967510] ================================================================== [ 25.968563] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.120809] BUG: Bad rss-counter state mm:00000000c03c553b type:MM_FILEPAGES val:33 [ 28.122019] BUG: Bad rss-counter state mm:00000000c03c553b type:MM_ANONPAGES val:22 [ 28.576570] BUG: Bad rss-counter state mm:000000008c797070 type:MM_FILEPAGES val:33 [ 28.577771] BUG: Bad rss-counter state mm:000000008c797070 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14472' (ECDSA) to the list of known hosts. 2023/06/19 12:35:59 fuzzer started 2023/06/19 12:35:59 dialing manager at localhost:44161 2023/06/19 12:35:59 checking machine... 2023/06/19 12:35:59 checking revisions... [ 29.292560] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:35:59 testing simple program... [ 29.334746] cgroup: Unknown subsys name 'net' [ 29.385980] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:35:57 Registers: info registers vcpu 0 RAX=0000000080010101 RBX=0000000000039500 RCX=ffffffff812e0423 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff88806ce39500 RBP=0000000000034b60 RSP=ffff88806ce09d60 R8 =0000000000000000 R9 =ffffed100d9c72a0 R10=ffff88806ce39503 R11=0000000000000001 R12=ffff88806ce39500 R13=ffff88806ce39518 R14=0000000000000000 R15=ffff888008d70000 RIP=ffffffff814c07eb RFL=00000082 [--S----] 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 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=00007f3b6f27e650 CR3=000000000ea0c000 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=35333a3231203931206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732039353a3533 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323330 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8613751a RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888017c2f950 RSP=ffff888017c2f888 R8 =ffffffff8613751e R9 =ffff888017c2f938 R10=0000000000038001 R11=0000000000020d8a R12=ffff888017c2f958 R13=ffff888017c2f940 R14=ffff888017c2fc48 R15=ffff888017c2f8f8 RIP=ffffffff81131171 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 00007f3b6ecc9900 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=00007f3b6f2810b0 CR3=000000000d014000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000