[ 24.079656] BUG: Bad rss-counter state mm:00000000e5871b5f type:MM_FILEPAGES val:33 [ 24.081056] BUG: Bad rss-counter state mm:00000000e5871b5f type:MM_ANONPAGES val:22 [ 24.120397] ================================================================== [ 24.121306] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.122270] Read of size 8 at addr ffff88800e5e8ed8 by task sshd/220 [ 24.123008] [ 24.123209] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.124005] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.124920] Call Trace: [ 24.125224] [ 24.125484] dump_stack_lvl+0x91/0xf0 [ 24.125945] print_report+0xcc/0x620 [ 24.126390] ? __virt_addr_valid+0x102/0x340 [ 24.126902] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.127491] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.128060] kasan_report+0xbe/0xf0 [ 24.128493] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.129060] vma_interval_tree_remove+0xc75/0xec0 [ 24.129611] vma_prepare+0xc54/0x11a0 [ 24.130050] __split_vma+0x5af/0x950 [ 24.130484] ? __pfx___split_vma+0x10/0x10 [ 24.130969] ? find_held_lock+0x2c/0x110 [ 24.131463] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.131981] ? lock_is_held_type+0x9f/0x120 [ 24.132480] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.133039] ? mtree_range_walk+0x632/0x900 [ 24.133549] ? mas_walk+0x5c7/0x7c0 [ 24.133989] do_vmi_munmap+0x1f1/0x2b0 [ 24.134443] mmap_region+0x1f9/0x2660 [ 24.134886] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.135365] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.136022] ? __pfx_lock_acquire+0x10/0x10 [ 24.136513] ? __pfx_mmap_region+0x10/0x10 [ 24.137002] ? security_mmap_addr+0x7d/0xa0 [ 24.137491] ? get_unmapped_area+0x1f5/0x3f0 [ 24.137998] do_mmap+0x854/0xf00 [ 24.138406] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.138857] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.139394] ksys_mmap_pgoff+0x3af/0x500 [ 24.139863] do_syscall_64+0x3f/0x90 [ 24.140303] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.140899] RIP: 0033:0x7efc9b36ad82 [ 24.141320] 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 [ 24.143280] RSP: 002b:00007fff97789758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.144126] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efc9b36ad82 [ 24.144906] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efc9a7a4000 [ 24.145689] RBP: 00007efc9a7a4000 R08: 0000000000000009 R09: 0000000000001000 [ 24.146471] R10: 0000000000000812 R11: 0000000000000206 R12: 000056419c880f70 [ 24.147251] R13: 00007fff97789770 R14: 00007fff977897a0 R15: 00007fff97789b00 [ 24.148053] [ 24.148322] [ 24.148519] Allocated by task 213: [ 24.148913] kasan_save_stack+0x22/0x50 [ 24.149375] kasan_set_track+0x25/0x30 [ 24.149832] __kasan_slab_alloc+0x59/0x70 [ 24.150315] kmem_cache_alloc+0x16b/0x370 [ 24.150791] vm_area_dup+0x20/0x160 [ 24.151211] __split_vma+0x170/0x950 [ 24.151662] split_vma+0xc6/0x110 [ 24.152066] mprotect_fixup+0x8d2/0xb30 [ 24.152530] do_mprotect_pkey+0x87e/0xd40 [ 24.153007] __x64_sys_mprotect+0x78/0xc0 [ 24.153496] do_syscall_64+0x3f/0x90 [ 24.153936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.154527] [ 24.154728] Freed by task 213: [ 24.155092] kasan_save_stack+0x22/0x50 [ 24.155559] kasan_set_track+0x25/0x30 [ 24.156012] kasan_save_free_info+0x2b/0x50 [ 24.156508] __kasan_slab_free+0x10a/0x190 [ 24.156999] kmem_cache_free+0x10d/0x4d0 [ 24.157468] rcu_core+0x8c8/0x2860 [ 24.157879] __do_softirq+0x1b7/0x7d4 [ 24.158322] [ 24.158523] Last potentially related work creation: [ 24.159062] kasan_save_stack+0x22/0x50 [ 24.159541] __kasan_record_aux_stack+0x8e/0xa0 [ 24.160069] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.160660] remove_vma+0x139/0x170 [ 24.161074] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.161583] do_vmi_munmap+0x1f1/0x2b0 [ 24.162031] __vm_munmap+0x138/0x3a0 [ 24.162459] __x64_sys_munmap+0x59/0x80 [ 24.162929] do_syscall_64+0x3f/0x90 [ 24.163382] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.163983] [ 24.164179] Second to last potentially related work creation: [ 24.164813] kasan_save_stack+0x22/0x50 [ 24.165276] __kasan_record_aux_stack+0x8e/0xa0 [ 24.165805] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.166399] remove_vma+0x139/0x170 [ 24.166809] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.167334] do_vmi_munmap+0x1f1/0x2b0 [ 24.167776] mmap_region+0x1f9/0x2660 [ 24.168206] do_mmap+0x854/0xf00 [ 24.168594] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.169037] ksys_mmap_pgoff+0x3af/0x500 [ 24.169491] do_syscall_64+0x3f/0x90 [ 24.169921] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.170507] [ 24.170703] The buggy address belongs to the object at ffff88800e5e8e80 [ 24.170703] which belongs to the cache vm_area_struct of size 168 [ 24.172049] The buggy address is located 88 bytes inside of [ 24.172049] freed 168-byte region [ffff88800e5e8e80, ffff88800e5e8f28) [ 24.173368] [ 24.173568] The buggy address belongs to the physical page: [ 24.174192] page:000000004acb9fc1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe5e8 [ 24.175207] memcg:ffff88800c95f801 [ 24.175615] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.176222] page_type: 0xffffffff() [ 24.176642] raw: 0100000000000200 ffff8880087a0c80 ffffea000035a100 dead000000000008 [ 24.177503] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c95f801 [ 24.178343] page dumped because: kasan: bad access detected [ 24.178967] [ 24.179172] Memory state around the buggy address: [ 24.179733] ffff88800e5e8d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.180534] ffff88800e5e8e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.181336] >ffff88800e5e8e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.182135] ^ [ 24.182826] ffff88800e5e8f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 24.183640] ffff88800e5e8f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.184438] ================================================================== [ 24.185391] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.738107] BUG: Bad rss-counter state mm:000000007c9d9982 type:MM_FILEPAGES val:33 [ 25.739126] BUG: Bad rss-counter state mm:000000007c9d9982 type:MM_ANONPAGES val:22 [ 26.269572] BUG: Bad rss-counter state mm:00000000887120f1 type:MM_FILEPAGES val:33 [ 26.270737] BUG: Bad rss-counter state mm:00000000887120f1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45994' (ECDSA) to the list of known hosts. 2023/06/20 11:43:36 fuzzer started 2023/06/20 11:43:36 dialing manager at localhost:36067 2023/06/20 11:43:36 checking machine... 2023/06/20 11:43:36 checking revisions... [ 26.880931] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:43:37 testing simple program... [ 26.934252] cgroup: Unknown subsys name 'net' [ 26.982705] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:43:36 Registers: info registers vcpu 0 RAX=0000000080010000 RBX=0000000000010000 RCX=ffffffff813bcfd0 RDX=0000000000010000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09dd0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000010000 R11=0000001213a7f960 R12=fffffffffffffca7 R13=ffff88806ce2c240 R14=ffff88801819fe98 R15=dffffc0000000000 RIP=ffffffff814c0250 RFL=00000006 [-----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 00007fc26e372900 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=00007ffeaa40c000 CR3=0000000009fe4000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007f7551ed7000 CR3=000000000d4b4000 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=2036333a33343a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a33343a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000