syzkaller login: [ 38.962973] BUG: Bad rss-counter state mm:00000000d30ea16b type:MM_FILEPAGES val:33 [ 38.964730] BUG: Bad rss-counter state mm:00000000d30ea16b type:MM_ANONPAGES val:22 [ 39.144952] ================================================================== [ 39.145942] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.146912] Read of size 8 at addr ffff88800e1ab4e0 by task sshd/218 [ 39.147694] [ 39.148058] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.149004] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.150014] Call Trace: [ 39.150345] [ 39.150658] dump_stack_lvl+0x91/0xf0 [ 39.151189] print_report+0xcc/0x620 [ 39.151686] ? __virt_addr_valid+0x102/0x340 [ 39.152254] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.152895] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.153532] kasan_report+0xbe/0xf0 [ 39.154025] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.154657] vma_interval_tree_remove+0xc75/0xec0 [ 39.155296] vma_prepare+0xc54/0x11a0 [ 39.155780] __split_vma+0x5af/0x950 [ 39.156261] ? __pfx___split_vma+0x10/0x10 [ 39.156786] ? find_held_lock+0x2c/0x110 [ 39.157325] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.157909] ? lock_is_held_type+0x9f/0x120 [ 39.158467] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.159103] ? mtree_range_walk+0x632/0x900 [ 39.159664] ? mas_walk+0x5c7/0x7c0 [ 39.160150] do_vmi_munmap+0x1f1/0x2b0 [ 39.160657] mmap_region+0x1f9/0x2660 [ 39.161141] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.161651] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.162378] ? __pfx_lock_acquire+0x10/0x10 [ 39.162929] ? __pfx_mmap_region+0x10/0x10 [ 39.163481] ? security_mmap_addr+0x7d/0xa0 [ 39.164042] ? get_unmapped_area+0x1f5/0x3f0 [ 39.164625] do_mmap+0x854/0xf00 [ 39.165095] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.165617] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.166202] ksys_mmap_pgoff+0x3af/0x500 [ 39.166752] do_syscall_64+0x3f/0x90 [ 39.167254] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.167934] RIP: 0033:0x7f03a3b4bd82 [ 39.168412] 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 [ 39.170672] RSP: 002b:00007ffdbc20bc28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.171630] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f03a3b4bd82 [ 39.172517] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f03a2f85000 [ 39.173401] RBP: 00007f03a2f85000 R08: 0000000000000009 R09: 0000000000001000 [ 39.174280] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555f2fa97ec0 [ 39.175175] R13: 00007ffdbc20bc40 R14: 00007ffdbc20bc70 R15: 00007ffdbc20bfd0 [ 39.176070] [ 39.176378] [ 39.176599] Allocated by task 211: [ 39.177045] kasan_save_stack+0x22/0x50 [ 39.177566] kasan_set_track+0x25/0x30 [ 39.178079] __kasan_slab_alloc+0x59/0x70 [ 39.178624] kmem_cache_alloc+0x16b/0x370 [ 39.179179] vm_area_dup+0x20/0x160 [ 39.179647] __split_vma+0x170/0x950 [ 39.180126] split_vma+0xc6/0x110 [ 39.180581] mprotect_fixup+0x8d2/0xb30 [ 39.181102] do_mprotect_pkey+0x87e/0xd40 [ 39.181643] __x64_sys_mprotect+0x78/0xc0 [ 39.182183] do_syscall_64+0x3f/0x90 [ 39.182676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.183358] [ 39.183582] Freed by task 211: [ 39.183992] kasan_save_stack+0x22/0x50 [ 39.184522] kasan_set_track+0x25/0x30 [ 39.185026] kasan_save_free_info+0x2b/0x50 [ 39.185578] __kasan_slab_free+0x10a/0x190 [ 39.186129] kmem_cache_free+0x10d/0x4d0 [ 39.186657] rcu_core+0x8c8/0x2860 [ 39.187139] __do_softirq+0x1b7/0x7d4 [ 39.187730] [ 39.188003] Last potentially related work creation: [ 39.188731] kasan_save_stack+0x22/0x50 [ 39.189449] __kasan_record_aux_stack+0x8e/0xa0 [ 39.190176] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.190998] remove_vma+0x139/0x170 [ 39.191559] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.192270] do_vmi_munmap+0x1f1/0x2b0 [ 39.192872] __vm_munmap+0x138/0x3a0 [ 39.193459] __x64_sys_munmap+0x59/0x80 [ 39.194093] do_syscall_64+0x3f/0x90 [ 39.194696] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.195531] [ 39.195797] The buggy address belongs to the object at ffff88800e1ab488 [ 39.195797] which belongs to the cache vm_area_struct of size 168 [ 39.197689] The buggy address is located 88 bytes inside of [ 39.197689] freed 168-byte region [ffff88800e1ab488, ffff88800e1ab530) [ 39.199478] [ 39.199743] The buggy address belongs to the physical page: [ 39.200581] page:00000000440f14c8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1ab [ 39.201973] memcg:ffff88800d1aaa01 [ 39.202516] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.203405] page_type: 0xffffffff() [ 39.203958] raw: 0100000000000200 ffff8880087a0c80 ffffea0000371bc0 dead000000000007 [ 39.205111] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d1aaa01 [ 39.206252] page dumped because: kasan: bad access detected [ 39.207093] [ 39.207355] Memory state around the buggy address: [ 39.208068] ffff88800e1ab380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 39.209143] ffff88800e1ab400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 39.210218] >ffff88800e1ab480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.211283] ^ [ 39.212212] ffff88800e1ab500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 39.213220] ffff88800e1ab580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.214213] ================================================================== [ 39.215320] Disabling lock debugging due to kernel taint [ 42.099442] BUG: Bad rss-counter state mm:00000000ccb6385a type:MM_FILEPAGES val:33 [ 42.100421] BUG: Bad rss-counter state mm:00000000ccb6385a type:MM_ANONPAGES val:22 [ 42.503931] BUG: Bad rss-counter state mm:00000000b5fbe13c type:MM_FILEPAGES val:33 [ 42.505429] BUG: Bad rss-counter state mm:00000000b5fbe13c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12608' (ECDSA) to the list of known hosts. 2023/06/21 04:45:43 fuzzer started 2023/06/21 04:45:43 dialing manager at localhost:36067 2023/06/21 04:45:43 checking machine... 2023/06/21 04:45:43 checking revisions... [ 43.267317] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:45:43 testing simple program... [ 43.319593] cgroup: Unknown subsys name 'net' [ 43.367683] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:45:42 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453684b RDX=fffffbfff0adb095 RSI=0000000000000004 RDI=ffffffff856d84a0 RBP=ffffffff856d84a0 RSP=ffff888008d9fb68 R8 =0000000000000000 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=0000000000000128 R12=0000000000000003 R13=fffffbfff0adb094 R14=0000000000000001 R15=1ffff110011b3f6f RIP=ffffffff8180fea8 RFL=00000002 [-------] 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 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=00007fcd9c32d0b0 CR3=000000001c98e000 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=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 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=ffff888008c04400 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=00007f4004d4a800 CR3=000000000d96a000 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=914dff8c6840788df44d096858512672 XMM02=ec2efd57dc4c00df000000000011aa60 XMM03=cf97f32caeb561c9000000000011ab30 XMM04=b0bfe19141542b1500000000000ae988 XMM05=751b9502027dc0b90000000000131048 XMM06=801aca9e950e70600000000000130220 XMM07=e042d86d42eb936e0000000000121710 XMM08=cf97f32caeb561c9000000000011ab30 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000