syzkaller login: [ 67.653377] BUG: Bad rss-counter state mm:00000000d500a19a type:MM_FILEPAGES val:33 [ 67.654422] BUG: Bad rss-counter state mm:00000000d500a19a type:MM_ANONPAGES val:22 [ 67.821027] ================================================================== [ 67.821951] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 67.822892] Read of size 8 at addr ffff888019d02d08 by task sshd/225 [ 67.823662] [ 67.823964] CPU: 0 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 67.824824] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 67.825822] Call Trace: [ 67.826158] [ 67.826448] dump_stack_lvl+0x91/0xf0 [ 67.826940] print_report+0xcc/0x620 [ 67.827440] ? __virt_addr_valid+0x102/0x340 [ 67.827992] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.828616] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.829238] kasan_report+0xbe/0xf0 [ 67.829733] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.830356] vma_interval_tree_remove+0xc75/0xec0 [ 67.830971] vma_prepare+0xc54/0x11a0 [ 67.831464] __split_vma+0x5af/0x950 [ 67.831947] ? __pfx___split_vma+0x10/0x10 [ 67.832489] ? find_held_lock+0x2c/0x110 [ 67.833014] do_vmi_align_munmap+0x2ba/0x11f0 [ 67.833609] ? lock_is_held_type+0x9f/0x120 [ 67.834152] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 67.834767] ? mtree_range_walk+0x632/0x900 [ 67.835317] ? mas_walk+0x5c7/0x7c0 [ 67.835804] do_vmi_munmap+0x1f1/0x2b0 [ 67.836297] mmap_region+0x1f9/0x2660 [ 67.836779] ? vm_mmap_pgoff+0x15c/0x3a0 [ 67.837292] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 67.838020] ? __pfx_lock_acquire+0x10/0x10 [ 67.838557] ? __pfx_mmap_region+0x10/0x10 [ 67.839086] ? security_mmap_addr+0x7d/0xa0 [ 67.839622] ? get_unmapped_area+0x1f5/0x3f0 [ 67.840175] do_mmap+0x854/0xf00 [ 67.840629] vm_mmap_pgoff+0x1a6/0x3a0 [ 67.841132] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 67.841712] ksys_mmap_pgoff+0x3af/0x500 [ 67.842225] do_syscall_64+0x3f/0x90 [ 67.842712] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.843365] RIP: 0033:0x7f4d09c4fd82 [ 67.843831] 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 [ 67.845992] RSP: 002b:00007fffab1089f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 67.846911] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4d09c4fd82 [ 67.847759] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4d09089000 [ 67.848612] RBP: 00007f4d09089000 R08: 0000000000000009 R09: 0000000000001000 [ 67.849470] R10: 0000000000000812 R11: 0000000000000206 R12: 00005582fe870b20 [ 67.850323] R13: 00007fffab108a10 R14: 00007fffab108a40 R15: 00007fffab108da0 [ 67.851187] [ 67.851484] [ 67.851701] Allocated by task 218: [ 67.852138] kasan_save_stack+0x22/0x50 [ 67.852650] kasan_set_track+0x25/0x30 [ 67.853149] __kasan_slab_alloc+0x59/0x70 [ 67.853699] kmem_cache_alloc+0x16b/0x370 [ 67.854225] vm_area_dup+0x20/0x160 [ 67.854686] __split_vma+0x170/0x950 [ 67.855159] split_vma+0xc6/0x110 [ 67.855604] mprotect_fixup+0x8d2/0xb30 [ 67.856113] do_mprotect_pkey+0x87e/0xd40 [ 67.856653] __x64_sys_mprotect+0x78/0xc0 [ 67.857193] do_syscall_64+0x3f/0x90 [ 67.857687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.858350] [ 67.858570] Freed by task 218: [ 67.858969] kasan_save_stack+0x22/0x50 [ 67.859480] kasan_set_track+0x25/0x30 [ 67.859979] kasan_save_free_info+0x2b/0x50 [ 67.860519] __kasan_slab_free+0x10a/0x190 [ 67.861056] kmem_cache_free+0x10d/0x4d0 [ 67.861586] rcu_core+0x8c8/0x2860 [ 67.862031] __do_softirq+0x1b7/0x7d4 [ 67.862513] [ 67.862730] Last potentially related work creation: [ 67.863321] kasan_save_stack+0x22/0x50 [ 67.863829] __kasan_record_aux_stack+0x8e/0xa0 [ 67.864415] __call_rcu_common.constprop.0+0x6a/0xb90 [ 67.865069] remove_vma+0x139/0x170 [ 67.865546] do_vmi_align_munmap+0xd4a/0x11f0 [ 67.866120] do_vmi_munmap+0x1f1/0x2b0 [ 67.866614] __vm_munmap+0x138/0x3a0 [ 67.867090] __x64_sys_munmap+0x59/0x80 [ 67.867597] do_syscall_64+0x3f/0x90 [ 67.868076] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.868739] [ 67.868958] The buggy address belongs to the object at ffff888019d02cb0 [ 67.868958] which belongs to the cache vm_area_struct of size 168 [ 67.870472] The buggy address is located 88 bytes inside of [ 67.870472] freed 168-byte region [ffff888019d02cb0, ffff888019d02d58) [ 67.871918] [ 67.872140] The buggy address belongs to the physical page: [ 67.872818] page:00000000a864f931 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d02 [ 67.873950] memcg:ffff888018c1ad01 [ 67.874381] flags: 0x100000000000200(slab|node=0|zone=1) [ 67.875046] page_type: 0xffffffff() [ 67.875510] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 67.876454] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018c1ad01 [ 67.877391] page dumped because: kasan: bad access detected [ 67.878090] [ 67.878313] Memory state around the buggy address: [ 67.878903] ffff888019d02c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 67.879784] ffff888019d02c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 67.880664] >ffff888019d02d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 67.881557] ^ [ 67.882010] ffff888019d02d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 67.882892] ffff888019d02e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 67.883768] ================================================================== [ 67.884814] Disabling lock debugging due to kernel taint [ 69.908481] BUG: Bad rss-counter state mm:000000003adbf7de type:MM_FILEPAGES val:33 [ 69.909217] BUG: Bad rss-counter state mm:000000003adbf7de type:MM_ANONPAGES val:22 [ 70.314479] BUG: Bad rss-counter state mm:000000000581c176 type:MM_FILEPAGES val:33 [ 70.315166] BUG: Bad rss-counter state mm:000000000581c176 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63078' (ECDSA) to the list of known hosts. 2023/06/19 21:56:17 fuzzer started 2023/06/19 21:56:17 dialing manager at localhost:44161 2023/06/19 21:56:17 checking machine... 2023/06/19 21:56:17 checking revisions... [ 70.971088] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:56:17 testing simple program... [ 71.021420] cgroup: Unknown subsys name 'net' [ 71.067217] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:56:11 Registers: info registers vcpu 0 RAX=ffff88800df955f0 RBX=ffff88800df95980 RCX=00000000800d0009 RDX=00000000800d000a RSI=ffff88800df95980 RDI=ffff88800844f780 RBP=ffff88801ba57a28 RSP=ffff88801ba57990 R8 =00000000800d0009 R9 =0000000000000000 R10=ffffea000037e540 R11=00000000800d000a R12=ffffea000037e540 R13=ffff88800df955f0 R14=00000000800d0009 R15=ffff88800844f780 RIP=ffffffff818095bf RFL=00000242 [---Z---] 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 00007fc7c90c1900 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=00007ffd20a09000 CR3=000000000e3d2000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fd91fac1cf0 CR3=000000000c4f0000 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=692d24a23a25b593464f914990836400 XMM02=ec2efd57dc4c00df000000000011d2b0 XMM03=14e53c92356894e9000000000011d380 XMM04=7286187dc20fcf3600000000000ae988 XMM05=02ba02518b42a7210000000000135228 XMM06=ae9b264101391a5b00000000001342c8 XMM07=e042d86d42eb936e0000000000124b78 XMM08=14e53c92356894e9000000000011d380 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000