syzkaller login: [ 30.965105] BUG: Bad rss-counter state mm:00000000e06b545d type:MM_FILEPAGES val:33 [ 30.967365] BUG: Bad rss-counter state mm:00000000e06b545d type:MM_ANONPAGES val:22 [ 31.131202] ================================================================== [ 31.132273] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.133373] Read of size 8 at addr ffff888017eb43f8 by task sshd/221 [ 31.134322] [ 31.134536] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.135394] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.136372] Call Trace: [ 31.136693] [ 31.136977] dump_stack_lvl+0x91/0xf0 [ 31.137465] print_report+0xcc/0x620 [ 31.138151] ? __virt_addr_valid+0x102/0x340 [ 31.138850] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.139572] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.140328] kasan_report+0xbe/0xf0 [ 31.140937] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.141687] vma_interval_tree_remove+0xc75/0xec0 [ 31.142485] vma_prepare+0xc54/0x11a0 [ 31.143078] __split_vma+0x5af/0x950 [ 31.143640] ? __pfx___split_vma+0x10/0x10 [ 31.144290] ? find_held_lock+0x2c/0x110 [ 31.144945] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.145618] ? lock_is_held_type+0x9f/0x120 [ 31.146286] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.147019] ? mtree_range_walk+0x632/0x900 [ 31.147689] ? mas_walk+0x5c7/0x7c0 [ 31.148273] do_vmi_munmap+0x1f1/0x2b0 [ 31.148893] mmap_region+0x1f9/0x2660 [ 31.149493] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.150174] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.151070] ? __pfx_lock_acquire+0x10/0x10 [ 31.151750] ? __pfx_mmap_region+0x10/0x10 [ 31.152405] ? security_mmap_addr+0x7d/0xa0 [ 31.153096] ? get_unmapped_area+0x1f5/0x3f0 [ 31.153824] do_mmap+0x854/0xf00 [ 31.154299] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.154807] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.155373] ksys_mmap_pgoff+0x3af/0x500 [ 31.155898] do_syscall_64+0x3f/0x90 [ 31.156378] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.157081] RIP: 0033:0x7f1b4fe22d82 [ 31.157553] 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 [ 31.159814] RSP: 002b:00007ffef0a34648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.160983] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1b4fe22d82 [ 31.161902] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1b4f25c000 [ 31.162797] RBP: 00007f1b4f25c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.163686] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562e5747db20 [ 31.164580] R13: 00007ffef0a34660 R14: 00007ffef0a34690 R15: 00007ffef0a349f0 [ 31.165503] [ 31.165850] [ 31.166076] Allocated by task 214: [ 31.166514] kasan_save_stack+0x22/0x50 [ 31.167057] kasan_set_track+0x25/0x30 [ 31.167561] __kasan_slab_alloc+0x59/0x70 [ 31.168118] kmem_cache_alloc+0x16b/0x370 [ 31.168647] vm_area_dup+0x20/0x160 [ 31.169136] __split_vma+0x170/0x950 [ 31.169611] split_vma+0xc6/0x110 [ 31.170092] mprotect_fixup+0x8d2/0xb30 [ 31.170608] do_mprotect_pkey+0x87e/0xd40 [ 31.171164] __x64_sys_mprotect+0x78/0xc0 [ 31.171710] do_syscall_64+0x3f/0x90 [ 31.172201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.172893] [ 31.173115] Freed by task 214: [ 31.173516] kasan_save_stack+0x22/0x50 [ 31.174072] kasan_set_track+0x25/0x30 [ 31.174585] kasan_save_free_info+0x2b/0x50 [ 31.175155] __kasan_slab_free+0x10a/0x190 [ 31.175714] kmem_cache_free+0x10d/0x4d0 [ 31.176243] rcu_core+0x8c8/0x2860 [ 31.176713] __do_softirq+0x1b7/0x7d4 [ 31.177219] [ 31.177441] Last potentially related work creation: [ 31.178083] kasan_save_stack+0x22/0x50 [ 31.178707] __kasan_record_aux_stack+0x8e/0xa0 [ 31.179505] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.180412] remove_vma+0x139/0x170 [ 31.181047] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.181850] do_vmi_munmap+0x1f1/0x2b0 [ 31.182535] __vm_munmap+0x138/0x3a0 [ 31.183189] __x64_sys_munmap+0x59/0x80 [ 31.183880] do_syscall_64+0x3f/0x90 [ 31.184547] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.185443] [ 31.185763] The buggy address belongs to the object at ffff888017eb43a0 [ 31.185763] which belongs to the cache vm_area_struct of size 168 [ 31.187845] The buggy address is located 88 bytes inside of [ 31.187845] freed 168-byte region [ffff888017eb43a0, ffff888017eb4448) [ 31.189829] [ 31.190132] The buggy address belongs to the physical page: [ 31.191067] page:00000000ee232d92 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17eb4 [ 31.192618] memcg:ffff88800f9e7e01 [ 31.193221] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.194152] page_type: 0xffffffff() [ 31.194781] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.196080] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f9e7e01 [ 31.197350] page dumped because: kasan: bad access detected [ 31.198156] [ 31.198380] Memory state around the buggy address: [ 31.198978] ffff888017eb4280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.199855] ffff888017eb4300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.200745] >ffff888017eb4380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.201615] ^ [ 31.202487] ffff888017eb4400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.203380] ffff888017eb4480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.204244] ================================================================== [ 31.205335] Disabling lock debugging due to kernel taint [ 33.247324] BUG: Bad rss-counter state mm:000000002673d302 type:MM_FILEPAGES val:33 [ 33.248593] BUG: Bad rss-counter state mm:000000002673d302 type:MM_ANONPAGES val:22 [ 33.679936] BUG: Bad rss-counter state mm:00000000f6c98e99 type:MM_FILEPAGES val:33 [ 33.681166] BUG: Bad rss-counter state mm:00000000f6c98e99 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60508' (ECDSA) to the list of known hosts. 2023/06/21 01:42:52 fuzzer started 2023/06/21 01:42:52 dialing manager at localhost:36067 2023/06/21 01:42:52 checking machine... 2023/06/21 01:42:52 checking revisions... [ 34.348607] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:42:52 testing simple program... [ 34.398621] cgroup: Unknown subsys name 'net' [ 34.446861] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:42:52 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=0000000000000001 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=00007fe561861000 CR3=0000000008c5a000 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=2032353a32343a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a32343a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff815342db RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff84535ffc RSP=ffff88806cf09dd0 R8 =0000000000000000 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=00000000000b6a61 R12=0000000000000287 R13=ffff8880166349c8 R14=ffffffff813782f8 R15=ffff88800da1c600 RIP=ffffffff8180fea8 RFL=00000056 [---ZAP-] 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 00007f3c53e2b900 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=00007f3c53e0a020 CR3=000000001bc24000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000