syzkaller login: [ 31.059631] BUG: Bad rss-counter state mm:00000000b89934b4 type:MM_FILEPAGES val:33 [ 31.060826] BUG: Bad rss-counter state mm:00000000b89934b4 type:MM_ANONPAGES val:22 [ 31.097522] ================================================================== [ 31.098510] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.099482] Read of size 8 at addr ffff88800fef4df0 by task sshd/219 [ 31.100264] [ 31.100489] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.101372] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.102356] Call Trace: [ 31.102681] [ 31.102968] dump_stack_lvl+0x91/0xf0 [ 31.103462] print_report+0xcc/0x620 [ 31.103978] ? __virt_addr_valid+0x102/0x340 [ 31.104536] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.105163] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.105783] kasan_report+0xbe/0xf0 [ 31.106261] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.106908] vma_interval_tree_remove+0xc75/0xec0 [ 31.107549] vma_prepare+0xc54/0x11a0 [ 31.108073] __split_vma+0x5af/0x950 [ 31.108572] ? __pfx___split_vma+0x10/0x10 [ 31.109128] ? find_held_lock+0x2c/0x110 [ 31.109685] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.110281] ? lock_is_held_type+0x9f/0x120 [ 31.110858] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.111505] ? mtree_range_walk+0x632/0x900 [ 31.112098] ? mas_walk+0x5c7/0x7c0 [ 31.112602] do_vmi_munmap+0x1f1/0x2b0 [ 31.113111] mmap_region+0x1f9/0x2660 [ 31.113630] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.114170] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.114932] ? __pfx_lock_acquire+0x10/0x10 [ 31.115498] ? __pfx_mmap_region+0x10/0x10 [ 31.116071] ? security_mmap_addr+0x7d/0xa0 [ 31.116640] ? get_unmapped_area+0x1f5/0x3f0 [ 31.117222] do_mmap+0x854/0xf00 [ 31.117683] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.118204] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.118791] ksys_mmap_pgoff+0x3af/0x500 [ 31.119319] do_syscall_64+0x3f/0x90 [ 31.119831] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.120526] RIP: 0033:0x7f66f8a10d82 [ 31.121015] 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 [ 31.123278] RSP: 002b:00007fff614b4bc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.124235] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f66f8a10d82 [ 31.125137] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f66f7e4a000 [ 31.126047] RBP: 00007f66f7e4a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.126954] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b3d9795980 [ 31.127868] R13: 00007fff614b4be0 R14: 00007fff614b4c10 R15: 00007fff614b4f70 [ 31.128807] [ 31.129115] [ 31.129432] Allocated by task 212: [ 31.129889] kasan_save_stack+0x22/0x50 [ 31.130417] kasan_set_track+0x25/0x30 [ 31.130937] __kasan_slab_alloc+0x59/0x70 [ 31.131489] kmem_cache_alloc+0x16b/0x370 [ 31.132040] vm_area_dup+0x20/0x160 [ 31.132523] __split_vma+0x170/0x950 [ 31.133022] split_vma+0xc6/0x110 [ 31.133485] mprotect_fixup+0x8d2/0xb30 [ 31.134014] do_mprotect_pkey+0x87e/0xd40 [ 31.134566] __x64_sys_mprotect+0x78/0xc0 [ 31.135107] do_syscall_64+0x3f/0x90 [ 31.135617] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.136310] [ 31.136538] Freed by task 202: [ 31.136960] kasan_save_stack+0x22/0x50 [ 31.137497] kasan_set_track+0x25/0x30 [ 31.138020] kasan_save_free_info+0x2b/0x50 [ 31.138589] __kasan_slab_free+0x10a/0x190 [ 31.139154] kmem_cache_free+0x10d/0x4d0 [ 31.139693] rcu_core+0x8c8/0x2860 [ 31.140173] __do_softirq+0x1b7/0x7d4 [ 31.140682] [ 31.140913] Last potentially related work creation: [ 31.141534] kasan_save_stack+0x22/0x50 [ 31.142069] __kasan_record_aux_stack+0x8e/0xa0 [ 31.142676] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.143358] remove_vma+0x139/0x170 [ 31.143827] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.144428] do_vmi_munmap+0x1f1/0x2b0 [ 31.144938] __vm_munmap+0x138/0x3a0 [ 31.145434] __x64_sys_munmap+0x59/0x80 [ 31.145963] do_syscall_64+0x3f/0x90 [ 31.146468] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.147147] [ 31.147375] The buggy address belongs to the object at ffff88800fef4d98 [ 31.147375] which belongs to the cache vm_area_struct of size 168 [ 31.148965] The buggy address is located 88 bytes inside of [ 31.148965] freed 168-byte region [ffff88800fef4d98, ffff88800fef4e40) [ 31.150452] [ 31.150686] The buggy address belongs to the physical page: [ 31.151379] page:00000000d81b0439 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfef4 [ 31.152542] memcg:ffff88800d989401 [ 31.152997] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.153683] page_type: 0xffffffff() [ 31.154160] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.155133] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d989401 [ 31.156112] page dumped because: kasan: bad access detected [ 31.156818] [ 31.157038] Memory state around the buggy address: [ 31.157647] ffff88800fef4c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.158564] ffff88800fef4d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.159474] >ffff88800fef4d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.160386] ^ [ 31.161253] ffff88800fef4e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.162178] ffff88800fef4e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.163089] ================================================================== [ 31.164281] Disabling lock debugging due to kernel taint [ 33.288521] BUG: Bad rss-counter state mm:0000000007c526a2 type:MM_FILEPAGES val:33 [ 33.289766] BUG: Bad rss-counter state mm:0000000007c526a2 type:MM_ANONPAGES val:22 [ 33.764513] BUG: Bad rss-counter state mm:00000000502acc9a type:MM_FILEPAGES val:33 [ 33.765763] BUG: Bad rss-counter state mm:00000000502acc9a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13963' (ECDSA) to the list of known hosts. 2023/06/21 04:11:17 fuzzer started 2023/06/21 04:11:17 dialing manager at localhost:36067 2023/06/21 04:11:17 checking machine... 2023/06/21 04:11:17 checking revisions... [ 34.460892] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:11:17 testing simple program... [ 34.514236] cgroup: Unknown subsys name 'net' [ 34.566008] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:11:17 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff1100302ce85 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff888018167410 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180fea8 RFL=00000256 [---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 00007f75cedfc700 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=00007ff1d31ab030 CR3=000000000e2b8000 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=2036313a31313a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a31313a3430203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff813ad6a8 RBX=ffffffff85dbd7f8 RCX=ffffffff813ad71f RDX=0000000000000000 RSI=ffffffff860d8256 RDI=ffffffff85dbd7f8 RBP=ffffffff85dbd7fc RSP=ffff88800fbff5f8 R8 =ffffffff860d8256 R9 =ffff88800fbff6f0 R10=0000000000038001 R11=0000000000010b8d R12=ffffffff85dbd7f8 R13=ffffffff85dbd7f8 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fca7 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 00007f3ee91cf900 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=00007f3ee91ae020 CR3=000000000d962000 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