Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 57.099287] BUG: Bad rss-counter state mm:00000000cd69a48e type:MM_FILEPAGES val:33 [ 57.100269] BUG: Bad rss-counter state mm:00000000cd69a48e type:MM_ANONPAGES val:22 [ 57.274000] ================================================================== [ 57.274979] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 57.275976] Read of size 8 at addr ffff8880180e33f8 by task sshd/227 [ 57.277031] [ 57.277307] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 57.278338] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 57.279495] Call Trace: [ 57.279886] [ 57.280264] dump_stack_lvl+0x91/0xf0 [ 57.280858] print_report+0xcc/0x620 [ 57.281437] ? __virt_addr_valid+0x102/0x340 [ 57.282088] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.282817] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.283563] kasan_report+0xbe/0xf0 [ 57.284156] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.284920] vma_interval_tree_remove+0xc75/0xec0 [ 57.285658] vma_prepare+0xc54/0x11a0 [ 57.286250] __split_vma+0x5af/0x950 [ 57.286828] ? __pfx___split_vma+0x10/0x10 [ 57.287475] ? find_held_lock+0x2c/0x110 [ 57.288122] do_vmi_align_munmap+0x2ba/0x11f0 [ 57.288816] ? lock_is_held_type+0x9f/0x120 [ 57.289479] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 57.290223] ? mtree_range_walk+0x632/0x900 [ 57.290898] ? mas_walk+0x5c7/0x7c0 [ 57.291481] do_vmi_munmap+0x1f1/0x2b0 [ 57.292104] mmap_region+0x1f9/0x2660 [ 57.292671] ? vm_mmap_pgoff+0x15c/0x3a0 [ 57.293187] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 57.293926] ? __pfx_lock_acquire+0x10/0x10 [ 57.294471] ? __pfx_mmap_region+0x10/0x10 [ 57.295007] ? security_mmap_addr+0x7d/0xa0 [ 57.295546] ? get_unmapped_area+0x1f5/0x3f0 [ 57.296119] do_mmap+0x854/0xf00 [ 57.296573] vm_mmap_pgoff+0x1a6/0x3a0 [ 57.297071] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 57.297642] ksys_mmap_pgoff+0x3af/0x500 [ 57.298158] do_syscall_64+0x3f/0x90 [ 57.298633] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.299287] RIP: 0033:0x7f986ff4fd82 [ 57.299799] 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 [ 57.301972] RSP: 002b:00007fff51fec538 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 57.302874] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f986ff4fd82 [ 57.303736] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f986f389000 [ 57.304617] RBP: 00007f986f389000 R08: 0000000000000009 R09: 0000000000001000 [ 57.305482] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d5856f2f70 [ 57.306355] R13: 00007fff51fec550 R14: 00007fff51fec580 R15: 00007fff51fec8e0 [ 57.307218] [ 57.307517] [ 57.307735] Allocated by task 220: [ 57.308182] kasan_save_stack+0x22/0x50 [ 57.308701] kasan_set_track+0x25/0x30 [ 57.309195] __kasan_slab_alloc+0x59/0x70 [ 57.309722] kmem_cache_alloc+0x16b/0x370 [ 57.310250] vm_area_dup+0x20/0x160 [ 57.310703] __split_vma+0x170/0x950 [ 57.311179] split_vma+0xc6/0x110 [ 57.311621] mprotect_fixup+0x8d2/0xb30 [ 57.312146] do_mprotect_pkey+0x87e/0xd40 [ 57.312668] __x64_sys_mprotect+0x78/0xc0 [ 57.313190] do_syscall_64+0x3f/0x90 [ 57.313663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.314310] [ 57.314525] Freed by task 220: [ 57.314930] kasan_save_stack+0x22/0x50 [ 57.315433] kasan_set_track+0x25/0x30 [ 57.315932] kasan_save_free_info+0x2b/0x50 [ 57.316478] __kasan_slab_free+0x10a/0x190 [ 57.317013] kmem_cache_free+0x10d/0x4d0 [ 57.317519] rcu_core+0x8c8/0x2860 [ 57.317975] __do_softirq+0x1b7/0x7d4 [ 57.318457] [ 57.318673] Last potentially related work creation: [ 57.319264] kasan_save_stack+0x22/0x50 [ 57.319766] __kasan_record_aux_stack+0x8e/0xa0 [ 57.320356] __call_rcu_common.constprop.0+0x6a/0xb90 [ 57.321000] remove_vma+0x139/0x170 [ 57.321461] do_vmi_align_munmap+0xd4a/0x11f0 [ 57.322048] do_vmi_munmap+0x1f1/0x2b0 [ 57.322540] __vm_munmap+0x138/0x3a0 [ 57.323013] __x64_sys_munmap+0x59/0x80 [ 57.323512] do_syscall_64+0x3f/0x90 [ 57.323987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.324657] [ 57.324880] Second to last potentially related work creation: [ 57.325591] kasan_save_stack+0x22/0x50 [ 57.326116] __kasan_record_aux_stack+0x8e/0xa0 [ 57.326704] __call_rcu_common.constprop.0+0x6a/0xb90 [ 57.327364] remove_vma+0x139/0x170 [ 57.327829] do_vmi_align_munmap+0xd4a/0x11f0 [ 57.328423] do_vmi_munmap+0x1f1/0x2b0 [ 57.328924] mmap_region+0x1f9/0x2660 [ 57.329422] do_mmap+0x854/0xf00 [ 57.329871] vm_mmap_pgoff+0x1a6/0x3a0 [ 57.330375] ksys_mmap_pgoff+0x3af/0x500 [ 57.330888] do_syscall_64+0x3f/0x90 [ 57.331375] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.332043] [ 57.332286] The buggy address belongs to the object at ffff8880180e33a0 [ 57.332286] which belongs to the cache vm_area_struct of size 168 [ 57.334072] The buggy address is located 88 bytes inside of [ 57.334072] freed 168-byte region [ffff8880180e33a0, ffff8880180e3448) [ 57.336087] [ 57.336334] The buggy address belongs to the physical page: [ 57.337022] page:000000005b856243 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x180e3 [ 57.338206] memcg:ffff8880191e8501 [ 57.338681] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 57.339446] page_type: 0xffffffff() [ 57.339917] raw: 0100000000000200 ffff88800879fc80 ffffea00003c2640 dead000000000005 [ 57.340967] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880191e8501 [ 57.341909] page dumped because: kasan: bad access detected [ 57.342611] [ 57.342836] Memory state around the buggy address: [ 57.343440] ffff8880180e3280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 57.344345] ffff8880180e3300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 57.345232] >ffff8880180e3380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 57.346116] ^ [ 57.346998] ffff8880180e3400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 57.347888] ffff8880180e3480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 57.348788] ================================================================== [ 57.350389] Disabling lock debugging due to kernel taint [ 59.338476] BUG: Bad rss-counter state mm:000000000eb1cb99 type:MM_FILEPAGES val:33 [ 59.339753] BUG: Bad rss-counter state mm:000000000eb1cb99 type:MM_ANONPAGES val:22 [ 59.754319] BUG: Bad rss-counter state mm:000000007828a174 type:MM_FILEPAGES val:33 [ 59.755306] BUG: Bad rss-counter state mm:000000007828a174 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45085' (ECDSA) to the list of known hosts. 2023/06/19 21:40:02 fuzzer started 2023/06/19 21:40:02 dialing manager at localhost:44161 2023/06/19 21:40:02 checking machine... 2023/06/19 21:40:02 checking revisions... [ 60.487481] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:40:02 testing simple program... [ 60.538614] cgroup: Unknown subsys name 'net' [ 60.603323] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:39:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000007 RDI=ffffffff8450c0ff RBP=ffffffff8450c0ff RSP=ffff888015d3ff08 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000007 R13=0000000000000000 R14=00005578c1770fd4 R15=0000000000000000 RIP=ffffffff81534456 RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa3e2a4a900 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=00005578c1770fd4 CR3=00000000145aa000 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=000000000000000000005578c0a14060 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888014730001 RBX=ffff88801472f5a8 RCX=0000000000000001 RDX=ffff88801472f601 RSI=ffff88801472f640 RDI=ffff88801472f5b8 RBP=ffff88801472f640 RSP=ffff88801472f4b0 R8 =0000000000000001 R9 =ffff88801472f5e8 R10=0000000000038001 R11=0000000000003c0d R12=0000000000000008 R13=ffff888014728000 R14=ffff88801472f640 R15=ffff88801472f5a8 RIP=ffffffff811304c9 RFL=00000202 [-------] 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 00007fd560123900 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=00007fd55f5524e0 CR3=000000000d434000 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=4aa18ec8cc5ef9834a406630b1223052 XMM02=eff9b2d0a8fce9cb000000000011ee60 XMM03=2c67c8bc2e329bc3000000000011ef88 XMM04=25de7000288bc49d00000000000ae988 XMM05=891ce75820adfd270000000000137228 XMM06=16bbfc4fa606b6250000000000135d50 XMM07=fb795ef6d657705600000000001251b0 XMM08=2c67c8bc2e329bc3000000000011ef88 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000