syzkaller login: [ 38.981230] BUG: Bad rss-counter state mm:00000000b2b30acc type:MM_FILEPAGES val:33 [ 38.982424] BUG: Bad rss-counter state mm:00000000b2b30acc type:MM_ANONPAGES val:22 [ 39.124780] ================================================================== [ 39.126010] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.127170] Read of size 8 at addr ffff88801011b798 by task sshd/219 [ 39.128162] [ 39.128439] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.129532] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.130739] Call Trace: [ 39.131146] [ 39.131505] dump_stack_lvl+0x91/0xf0 [ 39.132136] print_report+0xcc/0x620 [ 39.132752] ? __virt_addr_valid+0x102/0x340 [ 39.133450] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.134224] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.135007] kasan_report+0xbe/0xf0 [ 39.135618] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.136398] vma_interval_tree_remove+0xc75/0xec0 [ 39.137203] vma_prepare+0xc54/0x11a0 [ 39.137806] __split_vma+0x5af/0x950 [ 39.138452] ? __pfx___split_vma+0x10/0x10 [ 39.139121] ? find_held_lock+0x2c/0x110 [ 39.139780] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.140501] ? lock_is_held_type+0x9f/0x120 [ 39.141179] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.141953] ? mtree_range_walk+0x632/0x900 [ 39.142660] ? mas_walk+0x5c7/0x7c0 [ 39.143261] do_vmi_munmap+0x1f1/0x2b0 [ 39.143886] mmap_region+0x1f9/0x2660 [ 39.144476] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.145094] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.145957] ? __pfx_lock_acquire+0x10/0x10 [ 39.146610] ? __pfx_mmap_region+0x10/0x10 [ 39.147257] ? security_mmap_addr+0x7d/0xa0 [ 39.147911] ? get_unmapped_area+0x1f5/0x3f0 [ 39.148615] do_mmap+0x854/0xf00 [ 39.149160] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.149769] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.150461] ksys_mmap_pgoff+0x3af/0x500 [ 39.151087] do_syscall_64+0x3f/0x90 [ 39.151679] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.152567] RIP: 0033:0x7f2db774ad82 [ 39.153146] 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 [ 39.155872] RSP: 002b:00007ffffd8d1d68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.157019] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2db774ad82 [ 39.158143] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2db6b84000 [ 39.159225] RBP: 00007f2db6b84000 R08: 0000000000000009 R09: 0000000000001000 [ 39.160292] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b572a15b20 [ 39.161401] R13: 00007ffffd8d1d80 R14: 00007ffffd8d1db0 R15: 00007ffffd8d2110 [ 39.162535] [ 39.162912] [ 39.163192] Allocated by task 212: [ 39.163746] kasan_save_stack+0x22/0x50 [ 39.164404] kasan_set_track+0x25/0x30 [ 39.165066] __kasan_slab_alloc+0x59/0x70 [ 39.165751] kmem_cache_alloc+0x16b/0x370 [ 39.166427] vm_area_dup+0x20/0x160 [ 39.167009] __split_vma+0x170/0x950 [ 39.167598] split_vma+0xc6/0x110 [ 39.168154] mprotect_fixup+0x8d2/0xb30 [ 39.168882] do_mprotect_pkey+0x87e/0xd40 [ 39.169605] __x64_sys_mprotect+0x78/0xc0 [ 39.170318] do_syscall_64+0x3f/0x90 [ 39.170956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.171832] [ 39.172134] Freed by task 212: [ 39.172685] kasan_save_stack+0x22/0x50 [ 39.173375] kasan_set_track+0x25/0x30 [ 39.174048] kasan_save_free_info+0x2b/0x50 [ 39.174787] __kasan_slab_free+0x10a/0x190 [ 39.175515] kmem_cache_free+0x10d/0x4d0 [ 39.176221] rcu_core+0x8c8/0x2860 [ 39.176855] __do_softirq+0x1b7/0x7d4 [ 39.177499] [ 39.177749] Last potentially related work creation: [ 39.178424] kasan_save_stack+0x22/0x50 [ 39.178998] __kasan_record_aux_stack+0x8e/0xa0 [ 39.179654] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.180387] remove_vma+0x139/0x170 [ 39.180903] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.181529] do_vmi_munmap+0x1f1/0x2b0 [ 39.182077] __vm_munmap+0x138/0x3a0 [ 39.182606] __x64_sys_munmap+0x59/0x80 [ 39.183167] do_syscall_64+0x3f/0x90 [ 39.183714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.184444] [ 39.184715] The buggy address belongs to the object at ffff88801011b740 [ 39.184715] which belongs to the cache vm_area_struct of size 168 [ 39.186358] The buggy address is located 88 bytes inside of [ 39.186358] freed 168-byte region [ffff88801011b740, ffff88801011b7e8) [ 39.187933] [ 39.188181] The buggy address belongs to the physical page: [ 39.188923] page:00000000a9937d31 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1011b [ 39.190218] memcg:ffff888009801e01 [ 39.190767] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.191675] page_type: 0xffffffff() [ 39.192308] raw: 0100000000000200 ffff88800879fc80 ffffea0000580a40 dead000000000008 [ 39.193624] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009801e01 [ 39.194912] page dumped because: kasan: bad access detected [ 39.195856] [ 39.196151] Memory state around the buggy address: [ 39.196984] ffff88801011b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.198194] ffff88801011b700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.199407] >ffff88801011b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.200317] ^ [ 39.200863] ffff88801011b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.201771] ffff88801011b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.202675] ================================================================== [ 39.204054] Disabling lock debugging due to kernel taint [ 41.461986] BUG: Bad rss-counter state mm:000000006724a609 type:MM_FILEPAGES val:33 [ 41.463229] BUG: Bad rss-counter state mm:000000006724a609 type:MM_ANONPAGES val:22 [ 41.868145] BUG: Bad rss-counter state mm:0000000062cf541c type:MM_FILEPAGES val:33 [ 41.869341] BUG: Bad rss-counter state mm:0000000062cf541c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58813' (ECDSA) to the list of known hosts. 2023/06/19 22:03:10 fuzzer started 2023/06/19 22:03:10 dialing manager at localhost:44161 2023/06/19 22:03:10 checking machine... 2023/06/19 22:03:10 checking revisions... [ 42.641478] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:03:10 testing simple program... [ 42.696973] cgroup: Unknown subsys name 'net' [ 42.744387] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:03:10 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff88800db08ba0 RCX=ffffffff812e0423 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff88800db08ba0 RBP=ffff88800db08ba8 RSP=ffff8880147afb78 R8 =0000000000000000 R9 =ffffed1001b61174 R10=ffff88800db08ba3 R11=00000000000b6c88 R12=ffff88800db08bb0 R13=0000000000000000 R14=ffff8880147afdf0 R15=ffff88800ea7bae0 RIP=ffffffff812e0505 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007feae220e900 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=00007feae1663c80 CR3=0000000008db0000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=00e39cb28f655f2f00000000000ae988 XMM05=5cae2312eb07ea5d0000000000135340 XMM06=4fda316b135da52b0000000000134070 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81859f8c RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11002ca1f5d RSI=ffffffff81859f8c RDI=ffff88801650fb58 RBP=ffff88801650fb28 RSP=ffff88801650fa88 R8 =0000000000000001 R9 =ffff88801650fad0 R10=0000000000038001 R11=0000000000023884 R12=ffff88801650fb58 R13=0000000000000000 R14=ffff88800f2051c0 R15=ffff88800f6d2ab0 RIP=ffffffff813ad420 RFL=00000282 [--S----] 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 00007fe38e3e6900 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=00007ffc75bba000 CR3=000000000e5b8000 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