syzkaller login: [ 29.936330] BUG: Bad rss-counter state mm:00000000d1b87c3a type:MM_FILEPAGES val:33 [ 29.938039] BUG: Bad rss-counter state mm:00000000d1b87c3a type:MM_ANONPAGES val:22 [ 30.102724] ================================================================== [ 30.103358] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.104081] Read of size 8 at addr ffff88800df353f8 by task sshd/220 [ 30.104635] [ 30.104795] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.105405] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.110096] Call Trace: [ 30.118124] [ 30.118338] dump_stack_lvl+0x91/0xf0 [ 30.118697] print_report+0xcc/0x620 [ 30.119051] ? __virt_addr_valid+0x102/0x340 [ 30.119518] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.120170] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.120874] kasan_report+0xbe/0xf0 [ 30.121723] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.122922] vma_interval_tree_remove+0xc75/0xec0 [ 30.124046] vma_prepare+0xc54/0x11a0 [ 30.124949] __split_vma+0x5af/0x950 [ 30.125865] ? __pfx___split_vma+0x10/0x10 [ 30.130893] ? find_held_lock+0x2c/0x110 [ 30.131798] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.132794] ? lock_is_held_type+0x9f/0x120 [ 30.133764] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.134881] ? mtree_range_walk+0x632/0x900 [ 30.135876] ? mas_walk+0x5c7/0x7c0 [ 30.136691] do_vmi_munmap+0x1f1/0x2b0 [ 30.137593] mmap_region+0x1f9/0x2660 [ 30.138482] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.139421] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.140683] ? __pfx_lock_acquire+0x10/0x10 [ 30.141649] ? __pfx_mmap_region+0x10/0x10 [ 30.142658] ? security_mmap_addr+0x7d/0xa0 [ 30.143579] ? get_unmapped_area+0x1f5/0x3f0 [ 30.144547] do_mmap+0x854/0xf00 [ 30.145278] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.146164] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.147151] ksys_mmap_pgoff+0x3af/0x500 [ 30.148078] do_syscall_64+0x3f/0x90 [ 30.148882] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.150113] RIP: 0033:0x7f388371ed82 [ 30.150884] 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 [ 30.154744] RSP: 002b:00007ffdc7455268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.156330] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f388371ed82 [ 30.157856] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3882b58000 [ 30.159381] RBP: 00007f3882b58000 R08: 0000000000000009 R09: 0000000000001000 [ 30.160934] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564945df7b20 [ 30.162517] R13: 00007ffdc7455280 R14: 00007ffdc74552b0 R15: 00007ffdc7455610 [ 30.164128] [ 30.164642] [ 30.170392] Allocated by task 213: [ 30.171170] kasan_save_stack+0x22/0x50 [ 30.172105] kasan_set_track+0x25/0x30 [ 30.172970] __kasan_slab_alloc+0x59/0x70 [ 30.173913] kmem_cache_alloc+0x16b/0x370 [ 30.174858] vm_area_dup+0x20/0x160 [ 30.175636] __split_vma+0x170/0x950 [ 30.176436] split_vma+0xc6/0x110 [ 30.177195] mprotect_fixup+0x8d2/0xb30 [ 30.178025] do_mprotect_pkey+0x87e/0xd40 [ 30.178932] __x64_sys_mprotect+0x78/0xc0 [ 30.179811] do_syscall_64+0x3f/0x90 [ 30.180620] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.181730] [ 30.182143] Freed by task 13: [ 30.182857] kasan_save_stack+0x22/0x50 [ 30.183746] kasan_set_track+0x25/0x30 [ 30.184607] kasan_save_free_info+0x2b/0x50 [ 30.185614] __kasan_slab_free+0x10a/0x190 [ 30.186599] kmem_cache_free+0x10d/0x4d0 [ 30.187552] rcu_core+0x8c8/0x2860 [ 30.188348] __do_softirq+0x1b7/0x7d4 [ 30.189209] [ 30.189582] Last potentially related work creation: [ 30.190775] kasan_save_stack+0x22/0x50 [ 30.191677] __kasan_record_aux_stack+0x8e/0xa0 [ 30.192750] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.193919] remove_vma+0x139/0x170 [ 30.194714] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.195664] do_vmi_munmap+0x1f1/0x2b0 [ 30.196476] __vm_munmap+0x138/0x3a0 [ 30.197251] __x64_sys_munmap+0x59/0x80 [ 30.198096] do_syscall_64+0x3f/0x90 [ 30.198885] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.199971] [ 30.200308] Second to last potentially related work creation: [ 30.201540] kasan_save_stack+0x22/0x50 [ 30.202436] __kasan_record_aux_stack+0x8e/0xa0 [ 30.203438] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.204530] remove_vma+0x139/0x170 [ 30.205286] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.206298] do_vmi_munmap+0x1f1/0x2b0 [ 30.207204] mmap_region+0x1f9/0x2660 [ 30.208047] do_mmap+0x854/0xf00 [ 30.208812] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.209680] ksys_mmap_pgoff+0x3af/0x500 [ 30.210596] do_syscall_64+0x3f/0x90 [ 30.211430] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.212612] [ 30.212995] The buggy address belongs to the object at ffff88800df353a0 [ 30.212995] which belongs to the cache vm_area_struct of size 168 [ 30.215795] The buggy address is located 88 bytes inside of [ 30.215795] freed 168-byte region [ffff88800df353a0, ffff88800df35448) [ 30.218330] [ 30.218670] The buggy address belongs to the physical page: [ 30.219846] page:0000000005b6925b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf35 [ 30.221766] memcg:ffff88800f2f0401 [ 30.222570] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.223787] page_type: 0xffffffff() [ 30.224614] raw: 0100000000000200 ffff8880087a0c80 ffffea0000274d40 dead000000000004 [ 30.226448] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f2f0401 [ 30.228079] page dumped because: kasan: bad access detected [ 30.229245] [ 30.229579] Memory state around the buggy address: [ 30.230650] ffff88800df35280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.232280] ffff88800df35300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.233811] >ffff88800df35380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.235990] ^ [ 30.237582] ffff88800df35400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.239147] ffff88800df35480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.240661] ================================================================== [ 30.242472] Disabling lock debugging due to kernel taint [ 35.665451] BUG: Bad rss-counter state mm:0000000015d503cc type:MM_FILEPAGES val:33 [ 35.666295] BUG: Bad rss-counter state mm:0000000015d503cc type:MM_ANONPAGES val:22 [ 37.219197] BUG: Bad rss-counter state mm:000000000def1aef type:MM_FILEPAGES val:33 [ 37.219825] BUG: Bad rss-counter state mm:000000000def1aef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16366' (ECDSA) to the list of known hosts. 2023/06/21 10:00:45 fuzzer started 2023/06/21 10:00:46 dialing manager at localhost:36067 2023/06/21 10:00:46 checking machine... 2023/06/21 10:00:46 checking revisions... [ 38.186213] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:00:46 testing simple program... [ 38.227858] cgroup: Unknown subsys name 'net' [ 38.313811] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:00:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffea00006b44c0 RCX=ffffffff817c3c7c RDX=ffff88800f448000 RSI=0000000000000008 RDI=ffffea00006b44c0 RBP=ffffea00006b44c0 RSP=ffff888015a475f0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffffea00006b44c0 R13=ffff88800e188740 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8180fea8 RFL=00000293 [--S-A-C] 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=00007f56efd54790 CR3=000000000e28a000 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=0000000000000018fffffffe7ffbfeff XMM01=f10f6adc080c7fdd000055c900000030 XMM02=00000000000000023523aebbc739bbf8 XMM03=00000000000000008000000000000006 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=1ee1f3a1f5b99b620000000000000000 XMM07=516330128d219049e4fb419338c1c70d XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453684b RDX=fffffbfff0ac3014 RSI=0000000000000004 RDI=ffffffff85618098 RBP=ffffffff85618098 RSP=ffff888008da7bb0 R8 =0000000000000000 R9 =fffffbfff0ac3013 R10=ffffffff8561809b R11=0000000000000000 R12=0000000000000003 R13=fffffbfff0ac3013 R14=0000000000000001 R15=1ffff110011b4f77 RIP=ffffffff845368c8 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 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=000055c9f1c2f4d0 CR3=000000000fd12000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000