syzkaller login: [ 31.219573] BUG: Bad rss-counter state mm:000000007cbb332f type:MM_FILEPAGES val:33 [ 31.220861] BUG: Bad rss-counter state mm:000000007cbb332f type:MM_ANONPAGES val:22 [ 31.258921] ================================================================== [ 31.259819] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.260967] Read of size 8 at addr ffff88800de39140 by task sshd/219 [ 31.261739] [ 31.261959] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.262865] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.263848] Call Trace: [ 31.264170] [ 31.264459] dump_stack_lvl+0x91/0xf0 [ 31.264966] print_report+0xcc/0x620 [ 31.265456] ? __virt_addr_valid+0x102/0x340 [ 31.266011] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.266647] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.267274] kasan_report+0xbe/0xf0 [ 31.267753] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.268373] vma_interval_tree_remove+0xc75/0xec0 [ 31.268974] vma_prepare+0xc54/0x11a0 [ 31.269456] __split_vma+0x5af/0x950 [ 31.269924] ? __pfx___split_vma+0x10/0x10 [ 31.270455] ? find_held_lock+0x2c/0x110 [ 31.270980] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.271539] ? lock_is_held_type+0x9f/0x120 [ 31.272078] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.272687] ? mtree_range_walk+0x632/0x900 [ 31.273234] ? mas_walk+0x5c7/0x7c0 [ 31.273711] do_vmi_munmap+0x1f1/0x2b0 [ 31.274211] mmap_region+0x1f9/0x2660 [ 31.274725] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.275233] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.275950] ? __pfx_lock_acquire+0x10/0x10 [ 31.276486] ? __pfx_mmap_region+0x10/0x10 [ 31.277015] ? security_mmap_addr+0x7d/0xa0 [ 31.277546] ? get_unmapped_area+0x1f5/0x3f0 [ 31.278102] do_mmap+0x854/0xf00 [ 31.278543] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.279040] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.279600] ksys_mmap_pgoff+0x3af/0x500 [ 31.280099] do_syscall_64+0x3f/0x90 [ 31.280579] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.281227] RIP: 0033:0x7f08870afd82 [ 31.281675] 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 [ 31.283807] RSP: 002b:00007ffeea29e1c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.284698] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f08870afd82 [ 31.285545] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f08864e9000 [ 31.286397] RBP: 00007f08864e9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.287249] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556d55b11d90 [ 31.288100] R13: 00007ffeea29e1e0 R14: 00007ffeea29e210 R15: 00007ffeea29e570 [ 31.288946] [ 31.289235] [ 31.289452] Allocated by task 212: [ 31.289876] kasan_save_stack+0x22/0x50 [ 31.290373] kasan_set_track+0x25/0x30 [ 31.290873] __kasan_slab_alloc+0x59/0x70 [ 31.291388] kmem_cache_alloc+0x16b/0x370 [ 31.291899] vm_area_dup+0x20/0x160 [ 31.292346] __split_vma+0x170/0x950 [ 31.292807] split_vma+0xc6/0x110 [ 31.293244] mprotect_fixup+0x8d2/0xb30 [ 31.293743] do_mprotect_pkey+0x87e/0xd40 [ 31.294256] __x64_sys_mprotect+0x78/0xc0 [ 31.294803] do_syscall_64+0x3f/0x90 [ 31.295276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.295915] [ 31.296130] Freed by task 212: [ 31.296514] kasan_save_stack+0x22/0x50 [ 31.297013] kasan_set_track+0x25/0x30 [ 31.297503] kasan_save_free_info+0x2b/0x50 [ 31.298026] __kasan_slab_free+0x10a/0x190 [ 31.298563] kmem_cache_free+0x10d/0x4d0 [ 31.299070] rcu_core+0x8c8/0x2860 [ 31.299519] __do_softirq+0x1b7/0x7d4 [ 31.299993] [ 31.300208] Last potentially related work creation: [ 31.300787] kasan_save_stack+0x22/0x50 [ 31.301290] __kasan_record_aux_stack+0x8e/0xa0 [ 31.301863] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.302499] remove_vma+0x139/0x170 [ 31.302965] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.303527] do_vmi_munmap+0x1f1/0x2b0 [ 31.304009] __vm_munmap+0x138/0x3a0 [ 31.304472] __x64_sys_munmap+0x59/0x80 [ 31.304968] do_syscall_64+0x3f/0x90 [ 31.305440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.306075] [ 31.306288] Second to last potentially related work creation: [ 31.306977] kasan_save_stack+0x22/0x50 [ 31.307471] __kasan_record_aux_stack+0x8e/0xa0 [ 31.308034] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.308671] remove_vma+0x139/0x170 [ 31.309122] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.309678] do_vmi_munmap+0x1f1/0x2b0 [ 31.310163] mmap_region+0x1f9/0x2660 [ 31.310652] do_mmap+0x854/0xf00 [ 31.311104] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.311605] ksys_mmap_pgoff+0x3af/0x500 [ 31.312111] do_syscall_64+0x3f/0x90 [ 31.312593] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.313237] [ 31.313459] The buggy address belongs to the object at ffff88800de390e8 [ 31.313459] which belongs to the cache vm_area_struct of size 168 [ 31.314981] The buggy address is located 88 bytes inside of [ 31.314981] freed 168-byte region [ffff88800de390e8, ffff88800de39190) [ 31.316412] [ 31.316637] The buggy address belongs to the physical page: [ 31.317313] page:000000007b4eb878 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde39 [ 31.318423] memcg:ffff88800d785701 [ 31.318860] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.319511] page_type: 0xffffffff() [ 31.319961] raw: 0100000000000200 ffff8880087a0c80 ffffea0000383740 dead000000000002 [ 31.320888] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d785701 [ 31.321806] page dumped because: kasan: bad access detected [ 31.322468] [ 31.322706] Memory state around the buggy address: [ 31.323299] ffff88800de39000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.324154] ffff88800de39080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.325017] >ffff88800de39100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.325876] ^ [ 31.326517] ffff88800de39180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.327394] ffff88800de39200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.328257] ================================================================== [ 31.329377] Disabling lock debugging due to kernel taint [ 33.137733] BUG: Bad rss-counter state mm:000000008cea42fa type:MM_FILEPAGES val:33 [ 33.138988] BUG: Bad rss-counter state mm:000000008cea42fa type:MM_ANONPAGES val:22 [ 33.533450] BUG: Bad rss-counter state mm:00000000ce212330 type:MM_FILEPAGES val:33 [ 33.534516] BUG: Bad rss-counter state mm:00000000ce212330 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2308' (ECDSA) to the list of known hosts. 2023/06/20 21:40:32 fuzzer started 2023/06/20 21:40:33 dialing manager at localhost:36067 2023/06/20 21:40:33 checking machine... 2023/06/20 21:40:33 checking revisions... [ 34.145996] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:40:33 testing simple program... [ 34.198666] cgroup: Unknown subsys name 'net' [ 34.243858] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:40:32 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff83871c51 RDX=000000000002871c RSI=000000000002871c RDI=ffffffff8658b660 RBP=ffff8880186a7350 RSP=ffff8880186a7288 R8 =0000000000000000 R9 =ffff8880186a7338 R10=0000000000038001 R11=0000000000014abb R12=ffff8880186a7358 R13=ffff8880186a7340 R14=ffff8880186a7339 R15=ffff8880186a72f8 RIP=ffffffff8113077a RFL=00000216 [----AP-] 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 00007f2ee5df9900 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=00007ffd0a44c000 CR3=000000001a18a000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001da058f RBX=ffff88800ed02c48 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800ed02c78 RBP=ffff88800db60f00 RSP=ffff8880186a7d18 R8 =0000000000000001 R9 =ffffed10030d4f97 R10=0000000000000003 R11=0000000000000001 R12=dffffc0000000000 R13=ffff88800db6e600 R14=ffffffff818937f2 R15=dffffc0000000000 RIP=ffffffff818464ec 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2ee5df9900 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=00007f7892090fa0 CR3=000000001a18a000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000