syzkaller login: [ 31.966971] BUG: Bad rss-counter state mm:000000008dc1be9b type:MM_FILEPAGES val:33 [ 31.968414] BUG: Bad rss-counter state mm:000000008dc1be9b type:MM_ANONPAGES val:22 [ 32.121465] ================================================================== [ 32.122427] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.123441] Read of size 8 at addr ffff88800e44b058 by task sshd/220 [ 32.124256] [ 32.124595] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.125563] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.126655] Call Trace: [ 32.127001] [ 32.127304] dump_stack_lvl+0x91/0xf0 [ 32.127830] print_report+0xcc/0x620 [ 32.128345] ? __virt_addr_valid+0x102/0x340 [ 32.128934] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.129601] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.130261] kasan_report+0xbe/0xf0 [ 32.130768] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.131433] vma_interval_tree_remove+0xc75/0xec0 [ 32.132086] vma_prepare+0xc54/0x11a0 [ 32.132603] __split_vma+0x5af/0x950 [ 32.133112] ? __pfx___split_vma+0x10/0x10 [ 32.133684] ? find_held_lock+0x2c/0x110 [ 32.134248] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.134859] ? lock_is_held_type+0x9f/0x120 [ 32.135437] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.136091] ? mtree_range_walk+0x632/0x900 [ 32.136696] ? mas_walk+0x5c7/0x7c0 [ 32.137217] do_vmi_munmap+0x1f1/0x2b0 [ 32.137757] mmap_region+0x1f9/0x2660 [ 32.138278] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.138829] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.139602] ? __pfx_lock_acquire+0x10/0x10 [ 32.140174] ? __pfx_mmap_region+0x10/0x10 [ 32.140738] ? security_mmap_addr+0x7d/0xa0 [ 32.141312] ? get_unmapped_area+0x1f5/0x3f0 [ 32.141907] do_mmap+0x854/0xf00 [ 32.142373] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.142903] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.143501] ksys_mmap_pgoff+0x3af/0x500 [ 32.144050] do_syscall_64+0x3f/0x90 [ 32.144560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.145261] RIP: 0033:0x7f4c64573d82 [ 32.145759] 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 [ 32.148037] RSP: 002b:00007ffea74252e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.149014] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4c64573d82 [ 32.149946] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4c639ad000 [ 32.150857] RBP: 00007f4c639ad000 R08: 0000000000000009 R09: 0000000000001000 [ 32.151768] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557c5b35fd90 [ 32.152682] R13: 00007ffea7425300 R14: 00007ffea7425330 R15: 00007ffea7425690 [ 32.153620] [ 32.153936] [ 32.154166] Allocated by task 213: [ 32.154627] kasan_save_stack+0x22/0x50 [ 32.155168] kasan_set_track+0x25/0x30 [ 32.155696] __kasan_slab_alloc+0x59/0x70 [ 32.156265] kmem_cache_alloc+0x16b/0x370 [ 32.156822] vm_area_dup+0x20/0x160 [ 32.157311] __split_vma+0x170/0x950 [ 32.157839] split_vma+0xc6/0x110 [ 32.158312] mprotect_fixup+0x8d2/0xb30 [ 32.158853] do_mprotect_pkey+0x87e/0xd40 [ 32.159419] __x64_sys_mprotect+0x78/0xc0 [ 32.159978] do_syscall_64+0x3f/0x90 [ 32.160489] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.161194] [ 32.161435] Freed by task 213: [ 32.161868] kasan_save_stack+0x22/0x50 [ 32.162411] kasan_set_track+0x25/0x30 [ 32.162945] kasan_save_free_info+0x2b/0x50 [ 32.163526] __kasan_slab_free+0x10a/0x190 [ 32.164110] kmem_cache_free+0x10d/0x4d0 [ 32.164655] rcu_core+0x8c8/0x2860 [ 32.165137] __do_softirq+0x1b7/0x7d4 [ 32.165666] [ 32.165898] Last potentially related work creation: [ 32.166526] kasan_save_stack+0x22/0x50 [ 32.167062] __kasan_record_aux_stack+0x8e/0xa0 [ 32.167680] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.168380] remove_vma+0x139/0x170 [ 32.168870] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.169489] do_vmi_munmap+0x1f1/0x2b0 [ 32.170007] __vm_munmap+0x138/0x3a0 [ 32.170514] __x64_sys_munmap+0x59/0x80 [ 32.171053] do_syscall_64+0x3f/0x90 [ 32.171563] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.172249] [ 32.172486] Second to last potentially related work creation: [ 32.173216] kasan_save_stack+0x22/0x50 [ 32.173765] __kasan_record_aux_stack+0x8e/0xa0 [ 32.174374] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.175077] remove_vma+0x139/0x170 [ 32.175558] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.176147] do_vmi_munmap+0x1f1/0x2b0 [ 32.176679] mmap_region+0x1f9/0x2660 [ 32.177202] do_mmap+0x854/0xf00 [ 32.177668] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.178194] ksys_mmap_pgoff+0x3af/0x500 [ 32.178731] do_syscall_64+0x3f/0x90 [ 32.179239] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.179933] [ 32.180166] The buggy address belongs to the object at ffff88800e44b000 [ 32.180166] which belongs to the cache vm_area_struct of size 168 [ 32.181781] The buggy address is located 88 bytes inside of [ 32.181781] freed 168-byte region [ffff88800e44b000, ffff88800e44b0a8) [ 32.183310] [ 32.183546] The buggy address belongs to the physical page: [ 32.184260] page:0000000094cb47ca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe44b [ 32.185450] memcg:ffff88800e07cc01 [ 32.185919] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.186686] page_type: 0xffffffff() [ 32.187195] raw: 0100000000000200 ffff8880087a0c80 ffffea0000354f00 dead000000000007 [ 32.188207] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e07cc01 [ 32.189187] page dumped because: kasan: bad access detected [ 32.189930] [ 32.190164] Memory state around the buggy address: [ 32.190802] ffff88800e44af00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.191748] ffff88800e44af80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.192689] >ffff88800e44b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.193632] ^ [ 32.194433] ffff88800e44b080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 32.195375] ffff88800e44b100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.196316] ================================================================== [ 32.197452] Disabling lock debugging due to kernel taint [ 34.188968] BUG: Bad rss-counter state mm:000000005d4fe1e6 type:MM_FILEPAGES val:33 [ 34.189991] BUG: Bad rss-counter state mm:000000005d4fe1e6 type:MM_ANONPAGES val:22 [ 34.668120] BUG: Bad rss-counter state mm:0000000084607e0c type:MM_FILEPAGES val:33 [ 34.669235] BUG: Bad rss-counter state mm:0000000084607e0c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50072' (ECDSA) to the list of known hosts. 2023/06/20 14:12:13 fuzzer started 2023/06/20 14:12:13 dialing manager at localhost:36067 2023/06/20 14:12:13 checking machine... 2023/06/20 14:12:13 checking revisions... [ 35.439227] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:12:13 testing simple program... [ 35.486441] cgroup: Unknown subsys name 'net' [ 35.540370] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:12:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000055ff7aa43ed0 RCX=0000000000000000 RDX=00000000fbad2488 RSI=00007ffe02227088 RDI=000055ff7aa43fb0 RBP=00007ffe02227080 RSP=00007ffe02227020 R8 =000055ff7aa52ce8 R9 =00007fc2ee7a5be0 R10=0000000000000100 R11=0000000000000246 R12=000055ff7aa43ed0 R13=00007ffe02227088 R14=00007fc2ee1ceb22 R15=00007fc2ee1f3710 RIP=00007fc2ee65c89f RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc2ee1f3900 00000000 00000000 GS =0000 0000000000000000 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=00007ffe02221000 CR3=000000000d890000 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=23232323232323232323232323232323 XMM01=ffffffffffffff00ffff000000000000 XMM02=ffffffffffffff00ffff000000000000 XMM03=090942414e455f47535f474f4c535953 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=0000ffffffffffffffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 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=0000000000000001 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=00007fca46513000 CR3=000000000db2e000 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=2033313a32313a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a32313a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000