syzkaller login: [ 31.093007] BUG: Bad rss-counter state mm:000000008e10879d type:MM_FILEPAGES val:33 [ 31.094267] BUG: Bad rss-counter state mm:000000008e10879d type:MM_ANONPAGES val:22 [ 31.140780] ================================================================== [ 31.141867] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.142844] Read of size 8 at addr ffff888009711ed8 by task sshd/221 [ 31.143612] [ 31.143830] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.144709] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.145704] Call Trace: [ 31.146032] [ 31.146312] dump_stack_lvl+0x91/0xf0 [ 31.146803] print_report+0xcc/0x620 [ 31.147274] ? __virt_addr_valid+0x102/0x340 [ 31.147821] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.148436] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.149048] kasan_report+0xbe/0xf0 [ 31.149529] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.150151] vma_interval_tree_remove+0xc75/0xec0 [ 31.150763] vma_prepare+0xc54/0x11a0 [ 31.151249] __split_vma+0x5af/0x950 [ 31.151716] ? __pfx___split_vma+0x10/0x10 [ 31.152236] ? find_held_lock+0x2c/0x110 [ 31.152758] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.153327] ? lock_is_held_type+0x9f/0x120 [ 31.153874] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.154476] ? mtree_range_walk+0x632/0x900 [ 31.155026] ? mas_walk+0x5c7/0x7c0 [ 31.155497] do_vmi_munmap+0x1f1/0x2b0 [ 31.155979] mmap_region+0x1f9/0x2660 [ 31.156453] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.156968] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.157686] ? __pfx_lock_acquire+0x10/0x10 [ 31.158220] ? __pfx_mmap_region+0x10/0x10 [ 31.158802] ? security_mmap_addr+0x7d/0xa0 [ 31.159338] ? get_unmapped_area+0x1f5/0x3f0 [ 31.159881] do_mmap+0x854/0xf00 [ 31.160314] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.160806] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.161362] ksys_mmap_pgoff+0x3af/0x500 [ 31.161891] do_syscall_64+0x3f/0x90 [ 31.162366] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.163014] RIP: 0033:0x7f3bf33b2d82 [ 31.163464] 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 [ 31.165579] RSP: 002b:00007ffcd577ce38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.166475] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3bf33b2d82 [ 31.167325] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3bf27ec000 [ 31.168171] RBP: 00007f3bf27ec000 R08: 0000000000000009 R09: 0000000000001000 [ 31.169021] R10: 0000000000000812 R11: 0000000000000206 R12: 00005635bca0cec0 [ 31.169861] R13: 00007ffcd577ce50 R14: 00007ffcd577ce80 R15: 00007ffcd577d1e0 [ 31.170718] [ 31.171008] [ 31.171223] Allocated by task 214: [ 31.171649] kasan_save_stack+0x22/0x50 [ 31.172166] kasan_set_track+0x25/0x30 [ 31.172649] __kasan_slab_alloc+0x59/0x70 [ 31.173160] kmem_cache_alloc+0x16b/0x370 [ 31.173681] vm_area_dup+0x20/0x160 [ 31.174136] __split_vma+0x170/0x950 [ 31.174601] split_vma+0xc6/0x110 [ 31.175040] mprotect_fixup+0x8d2/0xb30 [ 31.175546] do_mprotect_pkey+0x87e/0xd40 [ 31.176093] __x64_sys_mprotect+0x78/0xc0 [ 31.176611] do_syscall_64+0x3f/0x90 [ 31.177089] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.177749] [ 31.177962] Freed by task 214: [ 31.178359] kasan_save_stack+0x22/0x50 [ 31.178856] kasan_set_track+0x25/0x30 [ 31.179341] kasan_save_free_info+0x2b/0x50 [ 31.179900] __kasan_slab_free+0x10a/0x190 [ 31.180434] kmem_cache_free+0x10d/0x4d0 [ 31.180936] rcu_core+0x8c8/0x2860 [ 31.181402] __do_softirq+0x1b7/0x7d4 [ 31.181914] [ 31.182135] Last potentially related work creation: [ 31.182744] kasan_save_stack+0x22/0x50 [ 31.183243] __kasan_record_aux_stack+0x8e/0xa0 [ 31.183826] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.184463] remove_vma+0x139/0x170 [ 31.184920] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.185478] do_vmi_munmap+0x1f1/0x2b0 [ 31.185992] __vm_munmap+0x138/0x3a0 [ 31.186462] __x64_sys_munmap+0x59/0x80 [ 31.186962] do_syscall_64+0x3f/0x90 [ 31.187465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.188127] [ 31.188345] The buggy address belongs to the object at ffff888009711e80 [ 31.188345] which belongs to the cache vm_area_struct of size 168 [ 31.189824] The buggy address is located 88 bytes inside of [ 31.189824] freed 168-byte region [ffff888009711e80, ffff888009711f28) [ 31.191248] [ 31.191462] The buggy address belongs to the physical page: [ 31.192126] page:00000000119a2ada refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9711 [ 31.193222] memcg:ffff88800cb30701 [ 31.193656] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.194356] page_type: 0xffffffff() [ 31.194822] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.195736] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb30701 [ 31.196662] page dumped because: kasan: bad access detected [ 31.197316] [ 31.197546] Memory state around the buggy address: [ 31.198118] ffff888009711d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.198966] ffff888009711e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.199817] >ffff888009711e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.200657] ^ [ 31.201394] ffff888009711f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.202264] ffff888009711f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.203111] ================================================================== [ 31.204302] Disabling lock debugging due to kernel taint [ 33.505576] BUG: Bad rss-counter state mm:00000000d92f0df4 type:MM_FILEPAGES val:33 [ 33.506720] BUG: Bad rss-counter state mm:00000000d92f0df4 type:MM_ANONPAGES val:22 [ 33.897921] BUG: Bad rss-counter state mm:00000000b61c9d5b type:MM_FILEPAGES val:33 [ 33.899545] BUG: Bad rss-counter state mm:00000000b61c9d5b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18905' (ECDSA) to the list of known hosts. 2023/06/21 07:55:50 fuzzer started 2023/06/21 07:55:50 dialing manager at localhost:36067 2023/06/21 07:55:50 checking machine... 2023/06/21 07:55:50 checking revisions... [ 34.619712] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:55:50 testing simple program... [ 34.678551] cgroup: Unknown subsys name 'net' [ 34.748039] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:55:50 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffc3ac619b8 CR3=000000000d90e000 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=2039343a35353a3730203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a35353a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000001 RBX=ffff88800c59fc60 RCX=ffffffff818e9803 RDX=ffff8880159b51c0 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888014707e00 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88800c59fc00 R13=ffff88801610b980 R14=0000000000000000 R15=0000000000000400 RIP=ffffffff814c086b 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 00007fcac1777900 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=00007fcac1d2f0b0 CR3=000000000e4ac000 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