syzkaller login: [ 30.953050] BUG: Bad rss-counter state mm:00000000417fb004 type:MM_FILEPAGES val:33 [ 30.954341] BUG: Bad rss-counter state mm:00000000417fb004 type:MM_ANONPAGES val:22 [ 31.106293] ================================================================== [ 31.107401] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.108520] Read of size 8 at addr ffff88800ea81b38 by task sshd/219 [ 31.109579] [ 31.109836] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.110870] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.111981] Call Trace: [ 31.112333] [ 31.112622] dump_stack_lvl+0x91/0xf0 [ 31.113127] print_report+0xcc/0x620 [ 31.113612] ? __virt_addr_valid+0x102/0x340 [ 31.114194] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.114818] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.115452] kasan_report+0xbe/0xf0 [ 31.115933] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.116641] vma_interval_tree_remove+0xc75/0xec0 [ 31.117386] vma_prepare+0xc54/0x11a0 [ 31.117968] __split_vma+0x5af/0x950 [ 31.118548] ? __pfx___split_vma+0x10/0x10 [ 31.119200] ? find_held_lock+0x2c/0x110 [ 31.119822] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.120540] ? lock_is_held_type+0x9f/0x120 [ 31.121206] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.121970] ? mtree_range_walk+0x632/0x900 [ 31.122617] ? mas_walk+0x5c7/0x7c0 [ 31.123123] do_vmi_munmap+0x1f1/0x2b0 [ 31.123620] mmap_region+0x1f9/0x2660 [ 31.124136] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.124661] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.125414] ? __pfx_lock_acquire+0x10/0x10 [ 31.125964] ? __pfx_mmap_region+0x10/0x10 [ 31.126512] ? security_mmap_addr+0x7d/0xa0 [ 31.127058] ? get_unmapped_area+0x1f5/0x3f0 [ 31.127618] do_mmap+0x854/0xf00 [ 31.128070] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.128592] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.129208] ksys_mmap_pgoff+0x3af/0x500 [ 31.129852] do_syscall_64+0x3f/0x90 [ 31.130374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.131044] RIP: 0033:0x7f9b8b691d82 [ 31.131517] 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 [ 31.133737] RSP: 002b:00007ffd8d426a58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.134776] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9b8b691d82 [ 31.135663] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9b8aacb000 [ 31.136585] RBP: 00007f9b8aacb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.137472] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a63d767d90 [ 31.138354] R13: 00007ffd8d426a70 R14: 00007ffd8d426aa0 R15: 00007ffd8d426e00 [ 31.139251] [ 31.139552] [ 31.139778] Allocated by task 212: [ 31.140232] kasan_save_stack+0x22/0x50 [ 31.140740] kasan_set_track+0x25/0x30 [ 31.141255] __kasan_slab_alloc+0x59/0x70 [ 31.141805] kmem_cache_alloc+0x16b/0x370 [ 31.142361] vm_area_dup+0x20/0x160 [ 31.142822] __split_vma+0x170/0x950 [ 31.143318] split_vma+0xc6/0x110 [ 31.143765] mprotect_fixup+0x8d2/0xb30 [ 31.144294] do_mprotect_pkey+0x87e/0xd40 [ 31.144823] __x64_sys_mprotect+0x78/0xc0 [ 31.145368] do_syscall_64+0x3f/0x90 [ 31.145866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.146572] [ 31.146808] Freed by task 212: [ 31.147229] kasan_save_stack+0x22/0x50 [ 31.147750] kasan_set_track+0x25/0x30 [ 31.148277] kasan_save_free_info+0x2b/0x50 [ 31.148830] __kasan_slab_free+0x10a/0x190 [ 31.149380] kmem_cache_free+0x10d/0x4d0 [ 31.149906] rcu_core+0x8c8/0x2860 [ 31.150466] __do_softirq+0x1b7/0x7d4 [ 31.150952] [ 31.151195] Last potentially related work creation: [ 31.151792] kasan_save_stack+0x22/0x50 [ 31.152320] __kasan_record_aux_stack+0x8e/0xa0 [ 31.152901] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.153559] remove_vma+0x139/0x170 [ 31.154068] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.154625] do_vmi_munmap+0x1f1/0x2b0 [ 31.155141] __vm_munmap+0x138/0x3a0 [ 31.155613] __x64_sys_munmap+0x59/0x80 [ 31.156147] do_syscall_64+0x3f/0x90 [ 31.156636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.157316] [ 31.157538] The buggy address belongs to the object at ffff88800ea81ae0 [ 31.157538] which belongs to the cache vm_area_struct of size 168 [ 31.159062] The buggy address is located 88 bytes inside of [ 31.159062] freed 168-byte region [ffff88800ea81ae0, ffff88800ea81b88) [ 31.160514] [ 31.160733] The buggy address belongs to the physical page: [ 31.161410] page:00000000f95256f5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea81 [ 31.162525] memcg:ffff88800d8d0e01 [ 31.162955] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.163614] page_type: 0xffffffff() [ 31.164082] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.165030] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d8d0e01 [ 31.165973] page dumped because: kasan: bad access detected [ 31.166640] [ 31.166854] Memory state around the buggy address: [ 31.167462] ffff88800ea81a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.168340] ffff88800ea81a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.169226] >ffff88800ea81b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.170100] ^ [ 31.170716] ffff88800ea81b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.171599] ffff88800ea81c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.172469] ================================================================== [ 31.173426] Disabling lock debugging due to kernel taint [ 33.788110] BUG: Bad rss-counter state mm:00000000f31c0bb4 type:MM_FILEPAGES val:33 [ 33.789644] BUG: Bad rss-counter state mm:00000000f31c0bb4 type:MM_ANONPAGES val:22 [ 34.277683] BUG: Bad rss-counter state mm:00000000b3d34674 type:MM_FILEPAGES val:33 [ 34.278913] BUG: Bad rss-counter state mm:00000000b3d34674 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53222' (ECDSA) to the list of known hosts. 2023/06/20 18:28:31 fuzzer started 2023/06/20 18:28:31 dialing manager at localhost:36067 2023/06/20 18:28:31 checking machine... 2023/06/20 18:28:31 checking revisions... [ 34.999043] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:28:31 testing simple program... [ 35.043924] cgroup: Unknown subsys name 'net' [ 35.083912] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:28:31 Registers: info registers vcpu 0 RAX=0000000080010004 RBX=ffff888008c60000 RCX=0000000000000000 RDX=000000000001c062 RSI=ffffffff8219168b RDI=0000000000000007 RBP=ffff888008c60180 RSP=ffff88806ce09de8 R8 =0000000000000007 R9 =0000000000010000 R10=000000000001c062 R11=ffff88806ce09ff8 R12=000000000001c062 R13=ffff888008c644c8 R14=0000000000000000 R15=ffff888008c60008 RIP=ffffffff8219168f 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f87d1324700 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=0000556db96cab40 CR3=000000000e406000 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=2031333a38323a3831203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a38323a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888016632000 RCX=0000000000000000 RDX=1ffff11002cc6422 RSI=ffffffff81657189 RDI=ffff888016632110 RBP=ffffea0000720140 RSP=ffff8880094dfa60 R8 =0000000000000007 R9 =0000000000000000 R10=00000000fffbfbae R11=0000000000000128 R12=ffff88801acc5e00 R13=ffff88801acc5f01 R14=0000000000000001 R15=ffff88801acc5e08 RIP=ffffffff8183b359 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 =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=00007fee35dce0b0 CR3=00000000100f6000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000