[ 44.686830] BUG: Bad rss-counter state mm:0000000085ca9b67 type:MM_FILEPAGES val:33 [ 44.687849] BUG: Bad rss-counter state mm:0000000085ca9b67 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 44.848017] ================================================================== [ 44.849073] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.850199] Read of size 8 at addr ffff88800e7864e0 by task sshd/218 [ 44.851293] [ 44.851555] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.852440] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.853434] Call Trace: [ 44.853765] [ 44.854050] dump_stack_lvl+0x91/0xf0 [ 44.854539] print_report+0xcc/0x620 [ 44.855035] ? __virt_addr_valid+0x102/0x340 [ 44.855586] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.856211] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.856826] kasan_report+0xbe/0xf0 [ 44.857303] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.857930] vma_interval_tree_remove+0xc75/0xec0 [ 44.858547] vma_prepare+0xc54/0x11a0 [ 44.859040] __split_vma+0x5af/0x950 [ 44.859528] ? __pfx___split_vma+0x10/0x10 [ 44.860067] ? find_held_lock+0x2c/0x110 [ 44.860599] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.861169] ? lock_is_held_type+0x9f/0x120 [ 44.861734] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.862342] ? mtree_range_walk+0x632/0x900 [ 44.862916] ? mas_walk+0x5c7/0x7c0 [ 44.863401] do_vmi_munmap+0x1f1/0x2b0 [ 44.863905] mmap_region+0x1f9/0x2660 [ 44.864398] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.864917] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.865645] ? __pfx_lock_acquire+0x10/0x10 [ 44.866190] ? __pfx_mmap_region+0x10/0x10 [ 44.866739] ? security_mmap_addr+0x7d/0xa0 [ 44.867280] ? get_unmapped_area+0x1f5/0x3f0 [ 44.867834] do_mmap+0x854/0xf00 [ 44.868286] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.868783] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.869345] ksys_mmap_pgoff+0x3af/0x500 [ 44.869851] do_syscall_64+0x3f/0x90 [ 44.870331] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.870993] RIP: 0033:0x7f9406668d82 [ 44.871448] 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 [ 44.873570] RSP: 002b:00007ffcd5fd9af8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.874477] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9406668d82 [ 44.875355] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9405aa2000 [ 44.876232] RBP: 00007f9405aa2000 R08: 0000000000000009 R09: 0000000000001000 [ 44.877115] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a43b1feec0 [ 44.877973] R13: 00007ffcd5fd9b10 R14: 00007ffcd5fd9b40 R15: 00007ffcd5fd9ea0 [ 44.878871] [ 44.879167] [ 44.879387] Allocated by task 211: [ 44.879819] kasan_save_stack+0x22/0x50 [ 44.880329] kasan_set_track+0x25/0x30 [ 44.880835] __kasan_slab_alloc+0x59/0x70 [ 44.881362] kmem_cache_alloc+0x16b/0x370 [ 44.881886] vm_area_dup+0x20/0x160 [ 44.882353] __split_vma+0x170/0x950 [ 44.882832] split_vma+0xc6/0x110 [ 44.883279] mprotect_fixup+0x8d2/0xb30 [ 44.883795] do_mprotect_pkey+0x87e/0xd40 [ 44.884316] __x64_sys_mprotect+0x78/0xc0 [ 44.884852] do_syscall_64+0x3f/0x90 [ 44.885326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.885971] [ 44.886186] Freed by task 211: [ 44.886580] kasan_save_stack+0x22/0x50 [ 44.887102] kasan_set_track+0x25/0x30 [ 44.887597] kasan_save_free_info+0x2b/0x50 [ 44.888134] __kasan_slab_free+0x10a/0x190 [ 44.888678] kmem_cache_free+0x10d/0x4d0 [ 44.889193] rcu_core+0x8c8/0x2860 [ 44.889641] __do_softirq+0x1b7/0x7d4 [ 44.890127] [ 44.890345] Last potentially related work creation: [ 44.890955] kasan_save_stack+0x22/0x50 [ 44.891465] __kasan_record_aux_stack+0x8e/0xa0 [ 44.892154] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.892809] remove_vma+0x139/0x170 [ 44.893263] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.893832] do_vmi_munmap+0x1f1/0x2b0 [ 44.894315] __vm_munmap+0x138/0x3a0 [ 44.894797] __x64_sys_munmap+0x59/0x80 [ 44.895292] do_syscall_64+0x3f/0x90 [ 44.895765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.896430] [ 44.896649] Second to last potentially related work creation: [ 44.897339] kasan_save_stack+0x22/0x50 [ 44.897852] __kasan_record_aux_stack+0x8e/0xa0 [ 44.898432] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.899105] remove_vma+0x139/0x170 [ 44.899566] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.900131] do_vmi_munmap+0x1f1/0x2b0 [ 44.900622] mmap_region+0x1f9/0x2660 [ 44.901103] do_mmap+0x854/0xf00 [ 44.901560] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.902056] ksys_mmap_pgoff+0x3af/0x500 [ 44.902569] do_syscall_64+0x3f/0x90 [ 44.903051] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.903701] [ 44.903916] The buggy address belongs to the object at ffff88800e786488 [ 44.903916] which belongs to the cache vm_area_struct of size 168 [ 44.905401] The buggy address is located 88 bytes inside of [ 44.905401] freed 168-byte region [ffff88800e786488, ffff88800e786530) [ 44.906818] [ 44.907035] The buggy address belongs to the physical page: [ 44.907704] page:000000007c45b9b6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe786 [ 44.908808] memcg:ffff88800ebf4001 [ 44.909242] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 44.909954] page_type: 0xffffffff() [ 44.910419] raw: 0100000000000200 ffff88800879fc80 ffffea000037cb40 dead000000000005 [ 44.911368] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebf4001 [ 44.912289] page dumped because: kasan: bad access detected [ 44.912953] [ 44.913171] Memory state around the buggy address: [ 44.913763] ffff88800e786380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.914628] ffff88800e786400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 44.915499] >ffff88800e786480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.916357] ^ [ 44.917125] ffff88800e786500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 44.917990] ffff88800e786580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.918878] ================================================================== [ 44.919955] Disabling lock debugging due to kernel taint [ 46.511278] BUG: Bad rss-counter state mm:00000000b870629a type:MM_FILEPAGES val:33 [ 46.512033] BUG: Bad rss-counter state mm:00000000b870629a type:MM_ANONPAGES val:22 [ 46.913228] BUG: Bad rss-counter state mm:00000000744e55c2 type:MM_FILEPAGES val:33 [ 46.914650] BUG: Bad rss-counter state mm:00000000744e55c2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60823' (ECDSA) to the list of known hosts. 2023/06/19 14:23:25 fuzzer started 2023/06/19 14:23:26 dialing manager at localhost:44161 2023/06/19 14:23:26 checking machine... 2023/06/19 14:23:26 checking revisions... [ 47.659021] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:23:26 testing simple program... [ 47.725082] cgroup: Unknown subsys name 'net' [ 47.785445] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:23:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff856528e0 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=00007f5437f6d477 RSP=ffff88806ce09a20 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=00007f5437f6d477 R13=0000000000000000 R14=ffff88800f170000 R15=ffff88800d3322e0 RIP=ffffffff814c8416 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 00007f5437a7a900 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=00007fff11057000 CR3=0000000016d82000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f76b2b7f050 CR3=000000000dbe2000 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=2035323a33323a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a33323a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000