syzkaller login: [ 23.977939] BUG: Bad rss-counter state mm:000000009f824700 type:MM_FILEPAGES val:33 [ 23.979589] BUG: Bad rss-counter state mm:000000009f824700 type:MM_ANONPAGES val:22 [ 24.139491] ================================================================== [ 24.140423] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.141366] Read of size 8 at addr ffff88800da324e0 by task sshd/218 [ 24.142135] [ 24.142354] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.143332] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.144342] Call Trace: [ 24.144664] [ 24.144949] dump_stack_lvl+0x91/0xf0 [ 24.145438] print_report+0xcc/0x620 [ 24.145944] ? __virt_addr_valid+0x102/0x340 [ 24.146495] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.147120] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.147743] kasan_report+0xbe/0xf0 [ 24.148227] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.148865] vma_interval_tree_remove+0xc75/0xec0 [ 24.149477] vma_prepare+0xc54/0x11a0 [ 24.149960] __split_vma+0x5af/0x950 [ 24.150436] ? __pfx___split_vma+0x10/0x10 [ 24.150969] ? find_held_lock+0x2c/0x110 [ 24.151496] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.152067] ? lock_is_held_type+0x9f/0x120 [ 24.152613] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.153223] ? mtree_range_walk+0x632/0x900 [ 24.153774] ? mas_walk+0x5c7/0x7c0 [ 24.154254] do_vmi_munmap+0x1f1/0x2b0 [ 24.154764] mmap_region+0x1f9/0x2660 [ 24.155253] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.155768] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.156497] ? __pfx_lock_acquire+0x10/0x10 [ 24.157035] ? __pfx_mmap_region+0x10/0x10 [ 24.157567] ? security_mmap_addr+0x7d/0xa0 [ 24.158118] ? get_unmapped_area+0x1f5/0x3f0 [ 24.158674] do_mmap+0x854/0xf00 [ 24.159129] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.159626] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.160195] ksys_mmap_pgoff+0x3af/0x500 [ 24.160711] do_syscall_64+0x3f/0x90 [ 24.161199] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.161846] RIP: 0033:0x7f6df62f2d82 [ 24.162307] 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 [ 24.164439] RSP: 002b:00007fffb06f0818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.165339] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6df62f2d82 [ 24.166182] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6df572c000 [ 24.167029] RBP: 00007f6df572c000 R08: 0000000000000009 R09: 0000000000001000 [ 24.167894] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e5eabcaf60 [ 24.168752] R13: 00007fffb06f0830 R14: 00007fffb06f0860 R15: 00007fffb06f0bc0 [ 24.169612] [ 24.169900] [ 24.170123] Allocated by task 211: [ 24.170563] kasan_save_stack+0x22/0x50 [ 24.171081] kasan_set_track+0x25/0x30 [ 24.171580] __kasan_slab_alloc+0x59/0x70 [ 24.172123] kmem_cache_alloc+0x16b/0x370 [ 24.172642] vm_area_dup+0x20/0x160 [ 24.173109] __split_vma+0x170/0x950 [ 24.173578] split_vma+0xc6/0x110 [ 24.174025] mprotect_fixup+0x8d2/0xb30 [ 24.174538] do_mprotect_pkey+0x87e/0xd40 [ 24.175067] __x64_sys_mprotect+0x78/0xc0 [ 24.175590] do_syscall_64+0x3f/0x90 [ 24.176070] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.176717] [ 24.176935] Freed by task 211: [ 24.177328] kasan_save_stack+0x22/0x50 [ 24.177833] kasan_set_track+0x25/0x30 [ 24.178329] kasan_save_free_info+0x2b/0x50 [ 24.178860] __kasan_slab_free+0x10a/0x190 [ 24.179396] kmem_cache_free+0x10d/0x4d0 [ 24.179915] rcu_core+0x8c8/0x2860 [ 24.180371] __do_softirq+0x1b7/0x7d4 [ 24.180846] [ 24.181059] Last potentially related work creation: [ 24.181648] kasan_save_stack+0x22/0x50 [ 24.182164] __kasan_record_aux_stack+0x8e/0xa0 [ 24.182744] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.183388] remove_vma+0x139/0x170 [ 24.183843] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.184419] do_vmi_munmap+0x1f1/0x2b0 [ 24.184906] __vm_munmap+0x138/0x3a0 [ 24.185372] __x64_sys_munmap+0x59/0x80 [ 24.185881] do_syscall_64+0x3f/0x90 [ 24.186355] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.186996] [ 24.187209] Second to last potentially related work creation: [ 24.187905] kasan_save_stack+0x22/0x50 [ 24.188414] __kasan_record_aux_stack+0x8e/0xa0 [ 24.188986] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.189634] remove_vma+0x139/0x170 [ 24.190092] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.190650] do_vmi_munmap+0x1f1/0x2b0 [ 24.191158] __vm_munmap+0x138/0x3a0 [ 24.191628] elf_map+0x26f/0x310 [ 24.192087] load_elf_binary+0x3417/0x5030 [ 24.192618] bprm_execve+0x803/0x1940 [ 24.193089] do_execveat_common+0x734/0x8e0 [ 24.193623] __x64_sys_execve+0x93/0xc0 [ 24.194117] do_syscall_64+0x3f/0x90 [ 24.194589] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.195232] [ 24.195451] The buggy address belongs to the object at ffff88800da32488 [ 24.195451] which belongs to the cache vm_area_struct of size 168 [ 24.196935] The buggy address is located 88 bytes inside of [ 24.196935] freed 168-byte region [ffff88800da32488, ffff88800da32530) [ 24.198334] [ 24.198554] The buggy address belongs to the physical page: [ 24.199210] page:00000000a0c5b17c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda32 [ 24.200309] memcg:ffff88800dbe6501 [ 24.200739] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.201386] page_type: 0xffffffff() [ 24.201839] raw: 0100000000000200 ffff88800879fc80 ffffea00005ac0c0 dead000000000002 [ 24.202767] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbe6501 [ 24.203682] page dumped because: kasan: bad access detected [ 24.204353] [ 24.204571] Memory state around the buggy address: [ 24.205154] ffff88800da32380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.206017] ffff88800da32400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 24.206880] >ffff88800da32480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.207732] ^ [ 24.208501] ffff88800da32500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 24.209352] ffff88800da32580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.210213] ================================================================== [ 24.211253] Disabling lock debugging due to kernel taint [ 26.125832] BUG: Bad rss-counter state mm:000000006690ca20 type:MM_FILEPAGES val:33 [ 26.126990] BUG: Bad rss-counter state mm:000000006690ca20 type:MM_ANONPAGES val:22 [ 26.635114] BUG: Bad rss-counter state mm:0000000066b4bb4e type:MM_FILEPAGES val:33 [ 26.636316] BUG: Bad rss-counter state mm:0000000066b4bb4e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58006' (ECDSA) to the list of known hosts. 2023/06/20 02:17:43 fuzzer started 2023/06/20 02:17:43 dialing manager at localhost:44161 2023/06/20 02:17:43 checking machine... 2023/06/20 02:17:43 checking revisions... [ 27.293452] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:17:43 testing simple program... [ 27.335236] cgroup: Unknown subsys name 'net' [ 27.365989] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:17:42 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88800e13da00 RCX=0000000000000000 RDX=ffff888016edd1c0 RSI=ffffffff8449ee91 RDI=ffff88800e13daf0 RBP=ffff88800e13da08 RSP=ffff888018ef7ce0 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000003 R11=0000000000000000 R12=ffff88800e13da00 R13=0000000000000002 R14=ffff88800e13da1c R15=ffff888018ef7e59 RIP=ffffffff814c0800 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f21d6363900 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=00007f21d691a618 CR3=000000000dc82000 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=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000073 RCX=0000000000000000 RDX=1ffff110028efef4 RSI=ffffffff818a28b9 RDI=ffff88801477f750 RBP=ffff88801477f750 RSP=ffff88801477f588 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000073 R11=0000000000000001 R12=0000000000000000 R13=0000000000000002 R14=ffff88801477f7a0 R15=ffff888014672225 RIP=ffffffff818a28de 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 00007fbcfaf83900 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=00007fbcfa3a1e90 CR3=000000000c45e000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=ea681200002ca7d300000000000ae988 XMM05=023bf5414c199af10000000000136168 XMM06=bdf2e299e47b49d50000000000134be8 XMM07=fb795ef6d65770560000000000123ad8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000