syzkaller login: [ 64.808539] BUG: Bad rss-counter state mm:00000000ab7fd704 type:MM_FILEPAGES val:33 [ 64.809805] BUG: Bad rss-counter state mm:00000000ab7fd704 type:MM_ANONPAGES val:22 [ 64.846371] ================================================================== [ 64.847333] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 64.848269] Read of size 8 at addr ffff888016a91b38 by task sshd/226 [ 64.849064] [ 64.849283] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 64.850152] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 64.851142] Call Trace: [ 64.851475] [ 64.851767] dump_stack_lvl+0x91/0xf0 [ 64.852271] print_report+0xcc/0x620 [ 64.852756] ? __virt_addr_valid+0x102/0x340 [ 64.853330] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.853959] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.854598] kasan_report+0xbe/0xf0 [ 64.855082] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.855718] vma_interval_tree_remove+0xc75/0xec0 [ 64.856326] vma_prepare+0xc54/0x11a0 [ 64.856805] __split_vma+0x5af/0x950 [ 64.857381] ? __pfx___split_vma+0x10/0x10 [ 64.857921] ? find_held_lock+0x2c/0x110 [ 64.858441] do_vmi_align_munmap+0x2ba/0x11f0 [ 64.859006] ? lock_is_held_type+0x9f/0x120 [ 64.859566] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 64.860197] ? mtree_range_walk+0x632/0x900 [ 64.860745] ? mas_walk+0x5c7/0x7c0 [ 64.861234] do_vmi_munmap+0x1f1/0x2b0 [ 64.861725] mmap_region+0x1f9/0x2660 [ 64.862209] ? vm_mmap_pgoff+0x15c/0x3a0 [ 64.862720] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 64.863428] ? __pfx_lock_acquire+0x10/0x10 [ 64.863964] ? __pfx_mmap_region+0x10/0x10 [ 64.864499] ? security_mmap_addr+0x7d/0xa0 [ 64.865045] ? get_unmapped_area+0x1f5/0x3f0 [ 64.865596] do_mmap+0x854/0xf00 [ 64.866033] vm_mmap_pgoff+0x1a6/0x3a0 [ 64.866530] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 64.867100] ksys_mmap_pgoff+0x3af/0x500 [ 64.867609] do_syscall_64+0x3f/0x90 [ 64.868086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.868736] RIP: 0033:0x7f874332cd82 [ 64.869196] 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 [ 64.871342] RSP: 002b:00007ffdc3ea5f08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 64.872255] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f874332cd82 [ 64.873117] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8742766000 [ 64.873965] RBP: 00007f8742766000 R08: 0000000000000009 R09: 0000000000001000 [ 64.874815] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558c85a5fec0 [ 64.875665] R13: 00007ffdc3ea5f20 R14: 00007ffdc3ea5f50 R15: 00007ffdc3ea62b0 [ 64.876523] [ 64.876820] [ 64.877042] Allocated by task 219: [ 64.877483] kasan_save_stack+0x22/0x50 [ 64.877991] kasan_set_track+0x25/0x30 [ 64.878486] __kasan_slab_alloc+0x59/0x70 [ 64.879025] kmem_cache_alloc+0x16b/0x370 [ 64.879548] vm_area_dup+0x20/0x160 [ 64.880002] __split_vma+0x170/0x950 [ 64.880473] split_vma+0xc6/0x110 [ 64.880915] mprotect_fixup+0x8d2/0xb30 [ 64.881425] do_mprotect_pkey+0x87e/0xd40 [ 64.881955] __x64_sys_mprotect+0x78/0xc0 [ 64.882484] do_syscall_64+0x3f/0x90 [ 64.882970] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.883614] [ 64.883829] Freed by task 219: [ 64.884225] kasan_save_stack+0x22/0x50 [ 64.884734] kasan_set_track+0x25/0x30 [ 64.885248] kasan_save_free_info+0x2b/0x50 [ 64.885780] __kasan_slab_free+0x10a/0x190 [ 64.886344] kmem_cache_free+0x10d/0x4d0 [ 64.886906] rcu_core+0x8c8/0x2860 [ 64.887352] __do_softirq+0x1b7/0x7d4 [ 64.887837] [ 64.888050] Last potentially related work creation: [ 64.888641] kasan_save_stack+0x22/0x50 [ 64.889159] __kasan_record_aux_stack+0x8e/0xa0 [ 64.889741] __call_rcu_common.constprop.0+0x6a/0xb90 [ 64.890397] remove_vma+0x139/0x170 [ 64.890864] do_vmi_align_munmap+0xd4a/0x11f0 [ 64.891435] do_vmi_munmap+0x1f1/0x2b0 [ 64.891925] __vm_munmap+0x138/0x3a0 [ 64.892401] __x64_sys_munmap+0x59/0x80 [ 64.892921] do_syscall_64+0x3f/0x90 [ 64.893405] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.894040] [ 64.894258] The buggy address belongs to the object at ffff888016a91ae0 [ 64.894258] which belongs to the cache vm_area_struct of size 168 [ 64.895736] The buggy address is located 88 bytes inside of [ 64.895736] freed 168-byte region [ffff888016a91ae0, ffff888016a91b88) [ 64.897167] [ 64.897382] The buggy address belongs to the physical page: [ 64.898046] page:000000000306eea3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a91 [ 64.899140] memcg:ffff888017cbd501 [ 64.899570] flags: 0x100000000000200(slab|node=0|zone=1) [ 64.900222] page_type: 0xffffffff() [ 64.900674] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 64.901613] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017cbd501 [ 64.902519] page dumped because: kasan: bad access detected [ 64.903190] [ 64.903408] Memory state around the buggy address: [ 64.903986] ffff888016a91a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 64.904842] ffff888016a91a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 64.905708] >ffff888016a91b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 64.906563] ^ [ 64.907171] ffff888016a91b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 64.908052] ffff888016a91c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 64.908931] ================================================================== [ 64.910015] Disabling lock debugging due to kernel taint [ 66.603516] BUG: Bad rss-counter state mm:0000000099455e77 type:MM_FILEPAGES val:33 [ 66.604200] BUG: Bad rss-counter state mm:0000000099455e77 type:MM_ANONPAGES val:22 [ 66.997075] BUG: Bad rss-counter state mm:00000000f5213f0f type:MM_FILEPAGES val:33 [ 66.998582] BUG: Bad rss-counter state mm:00000000f5213f0f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5551' (ECDSA) to the list of known hosts. 2023/06/19 13:22:20 fuzzer started 2023/06/19 13:22:21 dialing manager at localhost:44161 2023/06/19 13:22:21 checking machine... 2023/06/19 13:22:21 checking revisions... [ 67.763484] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:22:21 testing simple program... [ 67.815445] cgroup: Unknown subsys name 'net' [ 67.854980] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:22:17 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800da1f2c8 RCX=0000000000000001 RDX=1ffff11001b43e5b RSI=ffff88800da1fbe8 RDI=ffff88800da1f2d8 RBP=ffff88800da1fbe8 RSP=ffff88800da1f220 R8 =0000000000000001 R9 =ffff88800da1f308 R10=0000000000038001 R11=0000000000023842 R12=0000000000000008 R13=ffff88800da18000 R14=ffff88800da1fbe8 R15=ffff88800da1f2c8 RIP=ffffffff81130468 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 00007fd14f133900 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=00007fd14e5c4ed0 CR3=000000000d904000 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=790bd29bb380902900000000000ae988 XMM05=f1bbe21c87fe5c2d00000000001351c0 XMM06=13e856d8d71426c80000000000133c40 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11003399569 RBX=ffff888019ccab18 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888019ccab48 RBP=ffff8880191c2d38 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6c88 R12=dffffc0000000000 R13=ffff8880191c4a48 R14=ffffffff813782a8 R15=ffff88800cb67d00 RIP=ffffffff8184636c 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 00007f5dacfca900 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=00007f5dad36731c CR3=0000000008de8000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000