[ 23.695965] BUG: Bad rss-counter state mm:00000000a7ca88d1 type:MM_FILEPAGES val:33 [ 23.696591] BUG: Bad rss-counter state mm:00000000a7ca88d1 type:MM_ANONPAGES val:22 [ 23.806881] ================================================================== [ 23.807591] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.808313] Read of size 8 at addr ffff88800d494798 by task sshd/218 [ 23.808894] [ 23.809063] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.809730] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.810637] Call Trace: [ 23.810914] [ 23.811133] dump_stack_lvl+0x91/0xf0 [ 23.811511] print_report+0xcc/0x620 [ 23.811880] ? __virt_addr_valid+0x102/0x340 [ 23.812300] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.812797] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.813267] kasan_report+0xbe/0xf0 [ 23.813625] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.814108] vma_interval_tree_remove+0xc75/0xec0 [ 23.814533] vma_prepare+0xc54/0x11a0 [ 23.814843] __split_vma+0x5af/0x950 [ 23.815147] ? __pfx___split_vma+0x10/0x10 [ 23.815489] ? find_held_lock+0x2c/0x110 [ 23.815831] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.816200] ? lock_is_held_type+0x9f/0x120 [ 23.816548] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.816934] ? mtree_range_walk+0x632/0x900 [ 23.817291] ? mas_walk+0x5c7/0x7c0 [ 23.817597] do_vmi_munmap+0x1f1/0x2b0 [ 23.817919] mmap_region+0x1f9/0x2660 [ 23.818231] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.818563] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.819028] ? __pfx_lock_acquire+0x10/0x10 [ 23.819374] ? __pfx_mmap_region+0x10/0x10 [ 23.819713] ? security_mmap_addr+0x7d/0xa0 [ 23.820056] ? get_unmapped_area+0x1f5/0x3f0 [ 23.820411] do_mmap+0x854/0xf00 [ 23.820692] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.821006] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.821370] ksys_mmap_pgoff+0x3af/0x500 [ 23.821693] do_syscall_64+0x3f/0x90 [ 23.822028] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.822446] RIP: 0033:0x7f4f0ee4ad82 [ 23.822739] 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 [ 23.824117] RSP: 002b:00007ffeea13c9f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.824711] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4f0ee4ad82 [ 23.825257] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4f0e284000 [ 23.825809] RBP: 00007f4f0e284000 R08: 0000000000000009 R09: 0000000000001000 [ 23.826358] R10: 0000000000000812 R11: 0000000000000206 R12: 00005567846dfd90 [ 23.826907] R13: 00007ffeea13ca10 R14: 00007ffeea13ca40 R15: 00007ffeea13cda0 [ 23.827461] [ 23.827653] [ 23.827788] Allocated by task 209: [ 23.828067] kasan_save_stack+0x22/0x50 [ 23.828392] kasan_set_track+0x25/0x30 [ 23.828708] __kasan_slab_alloc+0x59/0x70 [ 23.829052] kmem_cache_alloc+0x16b/0x370 [ 23.829386] vm_area_dup+0x20/0x160 [ 23.829675] __split_vma+0x170/0x950 [ 23.829992] split_vma+0xc6/0x110 [ 23.830273] mprotect_fixup+0x8d2/0xb30 [ 23.830596] do_mprotect_pkey+0x87e/0xd40 [ 23.830936] __x64_sys_mprotect+0x78/0xc0 [ 23.831270] do_syscall_64+0x3f/0x90 [ 23.831574] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.831987] [ 23.832129] Freed by task 209: [ 23.832383] kasan_save_stack+0x22/0x50 [ 23.832703] kasan_set_track+0x25/0x30 [ 23.833023] kasan_save_free_info+0x2b/0x50 [ 23.833368] __kasan_slab_free+0x10a/0x190 [ 23.833719] kmem_cache_free+0x10d/0x4d0 [ 23.834046] rcu_core+0x8c8/0x2860 [ 23.834339] __do_softirq+0x1b7/0x7d4 [ 23.834647] [ 23.834787] Last potentially related work creation: [ 23.835167] kasan_save_stack+0x22/0x50 [ 23.835490] __kasan_record_aux_stack+0x8e/0xa0 [ 23.835853] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.836264] remove_vma+0x139/0x170 [ 23.836555] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.836917] do_vmi_munmap+0x1f1/0x2b0 [ 23.837230] __vm_munmap+0x138/0x3a0 [ 23.837533] __x64_sys_munmap+0x59/0x80 [ 23.837859] do_syscall_64+0x3f/0x90 [ 23.838167] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.838581] [ 23.838721] Second to last potentially related work creation: [ 23.839170] kasan_save_stack+0x22/0x50 [ 23.839492] __kasan_record_aux_stack+0x8e/0xa0 [ 23.839867] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.840287] remove_vma+0x139/0x170 [ 23.840580] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.840942] do_vmi_munmap+0x1f1/0x2b0 [ 23.841255] mmap_region+0x1f9/0x2660 [ 23.841560] do_mmap+0x854/0xf00 [ 23.841854] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.842166] ksys_mmap_pgoff+0x3af/0x500 [ 23.842489] do_syscall_64+0x3f/0x90 [ 23.842796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.843215] [ 23.843351] The buggy address belongs to the object at ffff88800d494740 [ 23.843351] which belongs to the cache vm_area_struct of size 168 [ 23.844304] The buggy address is located 88 bytes inside of [ 23.844304] freed 168-byte region [ffff88800d494740, ffff88800d4947e8) [ 23.845213] [ 23.845353] The buggy address belongs to the physical page: [ 23.845781] page:0000000093c94e4a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd494 [ 23.846481] memcg:ffff88800d30b601 [ 23.846761] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.847219] page_type: 0xffffffff() [ 23.847517] raw: 0100000000000200 ffff8880087a0c80 ffffea0000390980 dead000000000007 [ 23.848123] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d30b601 [ 23.848711] page dumped because: kasan: bad access detected [ 23.849140] [ 23.849280] Memory state around the buggy address: [ 23.849657] ffff88800d494680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.850220] ffff88800d494700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 23.850775] >ffff88800d494780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 23.851365] ^ [ 23.851715] ffff88800d494800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 23.852265] ffff88800d494880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 23.852809] ================================================================== [ 23.853394] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.749124] BUG: Bad rss-counter state mm:000000005b9e03af type:MM_FILEPAGES val:33 [ 25.750492] BUG: Bad rss-counter state mm:000000005b9e03af type:MM_ANONPAGES val:22 [ 26.271363] BUG: Bad rss-counter state mm:0000000027448980 type:MM_FILEPAGES val:33 [ 26.272333] BUG: Bad rss-counter state mm:0000000027448980 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28194' (ECDSA) to the list of known hosts. 2023/06/21 07:30:11 fuzzer started 2023/06/21 07:30:11 dialing manager at localhost:36067 2023/06/21 07:30:11 checking machine... 2023/06/21 07:30:11 checking revisions... [ 26.999499] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:30:11 testing simple program... [ 27.038807] cgroup: Unknown subsys name 'net' [ 27.082209] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:30:10 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffffffff85652c60 RCX=ffffffff814c84a1 RDX=0000000000000000 RSI=0000000080000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888018d47960 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=00007f37e90ed477 R13=0000000000000000 R14=ffff888016a151c0 R15=ffff88800c77e720 RIP=ffffffff814c0252 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 00007f37e8bfa900 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=00007f37e91b20b0 CR3=000000000d526000 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=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 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=00007f0696766030 CR3=000000000cb14000 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=00000000000000000000000000000000 XMM01=e8878254f68d0183a1429bb20eca9929 XMM02=000000000011a308ec2efd57dc4c00df XMM03=000000000012040827636c4c2748ecc0 XMM04=ed321d808139d6a500000000000ae988 XMM05=751b9502027dc0b90000000000131ba0 XMM06=50c7aca2b9e3d6940000000000130d78 XMM07=e042d86d42eb936e00000000001209d0 XMM08=27636c4c2748ecc0000000000011a368 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000