syzkaller login: [ 30.172163] BUG: Bad rss-counter state mm:000000004a976968 type:MM_FILEPAGES val:33 [ 30.173490] BUG: Bad rss-counter state mm:000000004a976968 type:MM_ANONPAGES val:22 [ 30.339584] ================================================================== [ 30.340542] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.341487] Read of size 8 at addr ffff8880168135c8 by task sshd/219 [ 30.342266] [ 30.342572] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.343422] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.344398] Call Trace: [ 30.344743] [ 30.345032] dump_stack_lvl+0x91/0xf0 [ 30.345523] print_report+0xcc/0x620 [ 30.346003] ? __virt_addr_valid+0x102/0x340 [ 30.346560] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.347189] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.347804] kasan_report+0xbe/0xf0 [ 30.348289] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.348906] vma_interval_tree_remove+0xc75/0xec0 [ 30.349505] vma_prepare+0xc54/0x11a0 [ 30.349984] __split_vma+0x5af/0x950 [ 30.350456] ? __pfx___split_vma+0x10/0x10 [ 30.350980] ? find_held_lock+0x2c/0x110 [ 30.351496] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.352077] ? lock_is_held_type+0x9f/0x120 [ 30.352616] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.353216] ? mtree_range_walk+0x632/0x900 [ 30.353766] ? mas_walk+0x5c7/0x7c0 [ 30.354249] do_vmi_munmap+0x1f1/0x2b0 [ 30.354737] mmap_region+0x1f9/0x2660 [ 30.355230] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.355749] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.356476] ? __pfx_lock_acquire+0x10/0x10 [ 30.357019] ? __pfx_mmap_region+0x10/0x10 [ 30.357544] ? security_mmap_addr+0x7d/0xa0 [ 30.358082] ? get_unmapped_area+0x1f5/0x3f0 [ 30.358634] do_mmap+0x854/0xf00 [ 30.359075] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.359573] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.360143] ksys_mmap_pgoff+0x3af/0x500 [ 30.360645] do_syscall_64+0x3f/0x90 [ 30.361135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.361786] RIP: 0033:0x7f435b68cd82 [ 30.362243] 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 [ 30.364376] RSP: 002b:00007ffea1546ef8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.365269] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f435b68cd82 [ 30.366124] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f435aac6000 [ 30.366971] RBP: 00007f435aac6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.367827] R10: 0000000000000812 R11: 0000000000000206 R12: 000056548d646b20 [ 30.368698] R13: 00007ffea1546f10 R14: 00007ffea1546f40 R15: 00007ffea15472a0 [ 30.369560] [ 30.369857] [ 30.370080] Allocated by task 212: [ 30.370518] kasan_save_stack+0x22/0x50 [ 30.371023] kasan_set_track+0x25/0x30 [ 30.371521] __kasan_slab_alloc+0x59/0x70 [ 30.372061] kmem_cache_alloc+0x16b/0x370 [ 30.372581] vm_area_dup+0x20/0x160 [ 30.373033] __split_vma+0x170/0x950 [ 30.373503] split_vma+0xc6/0x110 [ 30.373944] mprotect_fixup+0x8d2/0xb30 [ 30.374448] do_mprotect_pkey+0x87e/0xd40 [ 30.374978] __x64_sys_mprotect+0x78/0xc0 [ 30.375501] do_syscall_64+0x3f/0x90 [ 30.375993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.376639] [ 30.376853] Freed by task 13: [ 30.377245] kasan_save_stack+0x22/0x50 [ 30.377747] kasan_set_track+0x25/0x30 [ 30.378241] kasan_save_free_info+0x2b/0x50 [ 30.378781] __kasan_slab_free+0x10a/0x190 [ 30.379323] kmem_cache_free+0x10d/0x4d0 [ 30.379833] rcu_core+0x8c8/0x2860 [ 30.380295] __do_softirq+0x1b7/0x7d4 [ 30.380780] [ 30.380996] Last potentially related work creation: [ 30.381577] kasan_save_stack+0x22/0x50 [ 30.382084] __kasan_record_aux_stack+0x8e/0xa0 [ 30.382651] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.383298] remove_vma+0x139/0x170 [ 30.383745] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.384303] do_vmi_munmap+0x1f1/0x2b0 [ 30.384787] __vm_munmap+0x138/0x3a0 [ 30.385252] __x64_sys_munmap+0x59/0x80 [ 30.385742] do_syscall_64+0x3f/0x90 [ 30.386216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.386850] [ 30.387066] The buggy address belongs to the object at ffff888016813570 [ 30.387066] which belongs to the cache vm_area_struct of size 168 [ 30.388544] The buggy address is located 88 bytes inside of [ 30.388544] freed 168-byte region [ffff888016813570, ffff888016813618) [ 30.389935] [ 30.390154] The buggy address belongs to the physical page: [ 30.390808] page:000000004352a4d3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16813 [ 30.391894] memcg:ffff888016a17401 [ 30.392331] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.392983] page_type: 0xffffffff() [ 30.393429] raw: 0100000000000200 ffff8880087a0c80 ffffea000038ee80 dead000000000008 [ 30.394340] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a17401 [ 30.395248] page dumped because: kasan: bad access detected [ 30.395902] [ 30.396131] Memory state around the buggy address: [ 30.396708] ffff888016813480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.397555] ffff888016813500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.398414] >ffff888016813580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.399294] ^ [ 30.399968] ffff888016813600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.400817] ffff888016813680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.401659] ================================================================== [ 30.402640] Disabling lock debugging due to kernel taint [ 32.588073] BUG: Bad rss-counter state mm:000000002c26fa74 type:MM_FILEPAGES val:33 [ 32.589316] BUG: Bad rss-counter state mm:000000002c26fa74 type:MM_ANONPAGES val:22 [ 32.941556] BUG: Bad rss-counter state mm:00000000968aae64 type:MM_FILEPAGES val:33 [ 32.943091] BUG: Bad rss-counter state mm:00000000968aae64 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32203' (ECDSA) to the list of known hosts. 2023/06/20 14:15:05 fuzzer started 2023/06/20 14:15:05 dialing manager at localhost:36067 2023/06/20 14:15:05 checking machine... 2023/06/20 14:15:05 checking revisions... [ 33.670303] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:15:05 testing simple program... [ 33.717314] cgroup: Unknown subsys name 'net' [ 33.754661] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:15:05 Registers: info registers vcpu 0 RAX=ffffffff8185af64 RBX=ffffffff85e03b28 RCX=ffffffff8185af32 RDX=0000000000000000 RSI=ffffffff86141712 RDI=ffffffff85e03b20 RBP=ffffffff85e03b20 RSP=ffff888016e978d0 R8 =ffffffff86141712 R9 =ffff888016e979c8 R10=0000000000038001 R11=0000000000022457 R12=ffffffff85e03b24 R13=ffffffff85e03b20 R14=ffffffff85e03b20 R15=dffffc0000000000 RIP=ffffffff8112fc9f RFL=00000293 [--S-A-C] 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 00007fb2cadcd900 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=00007ffe760a3000 CR3=000000000fe30000 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=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=00007f94f73a7c80 CR3=000000000d5b2000 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=7d26b1c24ea3ba80b94ff4eb024f34be XMM02=0000000000119e98ec2efd57dc4c00df XMM03=00000000001214901d9c717faaf58257 XMM04=56f94170141c931a00000000000ae988 XMM05=dfcdbad4f1609c3700000000001315d0 XMM06=6950c09d3073c11c0000000000130438 XMM07=e042d86d42eb936e0000000000121710 XMM08=1d9c717faaf582570000000000119ef8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000