syzkaller login: [ 31.215587] BUG: Bad rss-counter state mm:0000000012b73a8b type:MM_FILEPAGES val:33 [ 31.216613] BUG: Bad rss-counter state mm:0000000012b73a8b type:MM_ANONPAGES val:22 [ 31.255451] ================================================================== [ 31.256427] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.257362] Read of size 8 at addr ffff8880102a14e0 by task sshd/221 [ 31.258125] [ 31.258355] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.259233] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.260209] Call Trace: [ 31.260529] [ 31.260811] dump_stack_lvl+0x91/0xf0 [ 31.261294] print_report+0xcc/0x620 [ 31.261781] ? __virt_addr_valid+0x102/0x340 [ 31.262334] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.262964] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.263574] kasan_report+0xbe/0xf0 [ 31.264055] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.264698] vma_interval_tree_remove+0xc75/0xec0 [ 31.265304] vma_prepare+0xc54/0x11a0 [ 31.265796] __split_vma+0x5af/0x950 [ 31.266287] ? __pfx___split_vma+0x10/0x10 [ 31.266853] ? find_held_lock+0x2c/0x110 [ 31.267393] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.267985] ? lock_is_held_type+0x9f/0x120 [ 31.268542] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.269182] ? mtree_range_walk+0x632/0x900 [ 31.269751] ? mas_walk+0x5c7/0x7c0 [ 31.270246] do_vmi_munmap+0x1f1/0x2b0 [ 31.270777] mmap_region+0x1f9/0x2660 [ 31.271272] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.271798] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.272530] ? __pfx_lock_acquire+0x10/0x10 [ 31.273080] ? __pfx_mmap_region+0x10/0x10 [ 31.273622] ? security_mmap_addr+0x7d/0xa0 [ 31.274173] ? get_unmapped_area+0x1f5/0x3f0 [ 31.274748] do_mmap+0x854/0xf00 [ 31.275199] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.275708] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.276284] ksys_mmap_pgoff+0x3af/0x500 [ 31.276808] do_syscall_64+0x3f/0x90 [ 31.277303] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.277969] RIP: 0033:0x7f44b152dd82 [ 31.278435] 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 [ 31.280649] RSP: 002b:00007ffe6a771648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.281585] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f44b152dd82 [ 31.282636] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f44b0967000 [ 31.283535] RBP: 00007f44b0967000 R08: 0000000000000009 R09: 0000000000001000 [ 31.284429] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559cc9c1af70 [ 31.285386] R13: 00007ffe6a771660 R14: 00007ffe6a771690 R15: 00007ffe6a7719f0 [ 31.286269] [ 31.286574] [ 31.286808] Allocated by task 214: [ 31.287251] kasan_save_stack+0x22/0x50 [ 31.287771] kasan_set_track+0x25/0x30 [ 31.288291] __kasan_slab_alloc+0x59/0x70 [ 31.288830] kmem_cache_alloc+0x16b/0x370 [ 31.289361] vm_area_dup+0x20/0x160 [ 31.289830] __split_vma+0x170/0x950 [ 31.290308] split_vma+0xc6/0x110 [ 31.290780] mprotect_fixup+0x8d2/0xb30 [ 31.291300] do_mprotect_pkey+0x87e/0xd40 [ 31.291844] __x64_sys_mprotect+0x78/0xc0 [ 31.292382] do_syscall_64+0x3f/0x90 [ 31.292879] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.293544] [ 31.293769] Freed by task 211: [ 31.294174] kasan_save_stack+0x22/0x50 [ 31.294709] kasan_set_track+0x25/0x30 [ 31.295222] kasan_save_free_info+0x2b/0x50 [ 31.295770] __kasan_slab_free+0x10a/0x190 [ 31.296325] kmem_cache_free+0x10d/0x4d0 [ 31.296852] rcu_core+0x8c8/0x2860 [ 31.297316] __do_softirq+0x1b7/0x7d4 [ 31.297806] [ 31.298030] Last potentially related work creation: [ 31.298635] kasan_save_stack+0x22/0x50 [ 31.299187] __kasan_record_aux_stack+0x8e/0xa0 [ 31.299777] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.300444] remove_vma+0x139/0x170 [ 31.300908] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.301483] do_vmi_munmap+0x1f1/0x2b0 [ 31.301988] __vm_munmap+0x138/0x3a0 [ 31.302475] __x64_sys_munmap+0x59/0x80 [ 31.303003] do_syscall_64+0x3f/0x90 [ 31.303492] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.304156] [ 31.304376] The buggy address belongs to the object at ffff8880102a1488 [ 31.304376] which belongs to the cache vm_area_struct of size 168 [ 31.305905] The buggy address is located 88 bytes inside of [ 31.305905] freed 168-byte region [ffff8880102a1488, ffff8880102a1530) [ 31.307368] [ 31.307589] The buggy address belongs to the physical page: [ 31.308272] page:000000001bccaef3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102a1 [ 31.309405] memcg:ffff88801960a701 [ 31.309846] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.310522] page_type: 0xffffffff() [ 31.311003] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.311960] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801960a701 [ 31.312901] page dumped because: kasan: bad access detected [ 31.313590] [ 31.313810] Memory state around the buggy address: [ 31.314412] ffff8880102a1380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.315315] ffff8880102a1400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.316204] >ffff8880102a1480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.317086] ^ [ 31.317864] ffff8880102a1500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.318776] ffff8880102a1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.319658] ================================================================== [ 31.320817] Disabling lock debugging due to kernel taint [ 33.442316] BUG: Bad rss-counter state mm:000000008f19bad4 type:MM_FILEPAGES val:33 [ 33.443324] BUG: Bad rss-counter state mm:000000008f19bad4 type:MM_ANONPAGES val:22 [ 33.935885] BUG: Bad rss-counter state mm:000000009c274748 type:MM_FILEPAGES val:33 [ 33.936885] BUG: Bad rss-counter state mm:000000009c274748 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27168' (ECDSA) to the list of known hosts. 2023/06/19 21:13:34 fuzzer started 2023/06/19 21:13:34 dialing manager at localhost:44161 2023/06/19 21:13:34 checking machine... 2023/06/19 21:13:34 checking revisions... [ 34.638018] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:13:35 testing simple program... [ 34.692447] cgroup: Unknown subsys name 'net' [ 34.745263] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:13:34 Registers: info registers vcpu 0 RAX=0000000000020d8a RBX=0000000000000002 RCX=ffffffff8180c521 RDX=0000000000020d9b RSI=00000000000080c5 RDI=ffffffff8613756e RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86137508 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130861 RFL=00000287 [--S--PC] 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 00007fa58cefe900 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=00007fa58c331970 CR3=000000000d48c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=5c1daf904e5a6eb900000000000ae988 XMM05=63e97137eb5cc8400000000000134a90 XMM06=2f001e3d1486f6bb0000000000133830 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888008e57a40 RCX=ffffffff860d6801 RDX=1ffff110011caf49 RSI=ffffffff8180c522 RDI=ffff888008e57a48 RBP=0000000000000000 RSP=ffff888008e57958 R8 =ffffffff860d68fa R9 =ffff888008e579b8 R10=0000000000038001 R11=0000000000010b7e R12=ffff888008e57a40 R13=0000000000000000 R14=ffff888008e2d1c0 R15=ffff88800cb99670 RIP=ffffffff813ad46e RFL=00000212 [----A--] 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 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=00007ffc938fc000 CR3=000000000d95c000 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=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