syzkaller login: [ 30.975092] BUG: Bad rss-counter state mm:00000000cb53c3f4 type:MM_FILEPAGES val:33 [ 30.976713] BUG: Bad rss-counter state mm:00000000cb53c3f4 type:MM_ANONPAGES val:22 [ 31.133189] ================================================================== [ 31.134141] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.135116] Read of size 8 at addr ffff88800d8a5140 by task sshd/219 [ 31.135902] [ 31.136119] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.137138] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.138154] Call Trace: [ 31.138492] [ 31.138894] dump_stack_lvl+0x91/0xf0 [ 31.139538] print_report+0xcc/0x620 [ 31.140116] ? __virt_addr_valid+0x102/0x340 [ 31.140807] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.141530] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.142293] kasan_report+0xbe/0xf0 [ 31.142891] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.143658] vma_interval_tree_remove+0xc75/0xec0 [ 31.144242] vma_prepare+0xc54/0x11a0 [ 31.144711] __split_vma+0x5af/0x950 [ 31.145183] ? __pfx___split_vma+0x10/0x10 [ 31.145716] ? find_held_lock+0x2c/0x110 [ 31.146242] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.146821] ? lock_is_held_type+0x9f/0x120 [ 31.147370] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.147962] ? mtree_range_walk+0x632/0x900 [ 31.148518] ? mas_walk+0x5c7/0x7c0 [ 31.149005] do_vmi_munmap+0x1f1/0x2b0 [ 31.149504] mmap_region+0x1f9/0x2660 [ 31.149986] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.150521] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.151243] ? __pfx_lock_acquire+0x10/0x10 [ 31.151781] ? __pfx_mmap_region+0x10/0x10 [ 31.152329] ? security_mmap_addr+0x7d/0xa0 [ 31.152873] ? get_unmapped_area+0x1f5/0x3f0 [ 31.153436] do_mmap+0x854/0xf00 [ 31.153892] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.154388] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.154983] ksys_mmap_pgoff+0x3af/0x500 [ 31.155488] do_syscall_64+0x3f/0x90 [ 31.155976] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.156631] RIP: 0033:0x7fabbfa90d82 [ 31.157090] 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 [ 31.159239] RSP: 002b:00007ffe20fc2b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.160144] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fabbfa90d82 [ 31.160992] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fabbeeca000 [ 31.161863] RBP: 00007fabbeeca000 R08: 0000000000000009 R09: 0000000000001000 [ 31.162719] R10: 0000000000000812 R11: 0000000000000206 R12: 000055736cee6f70 [ 31.163596] R13: 00007ffe20fc2b60 R14: 00007ffe20fc2b90 R15: 00007ffe20fc2ef0 [ 31.164459] [ 31.164754] [ 31.164969] Allocated by task 212: [ 31.165400] kasan_save_stack+0x22/0x50 [ 31.165914] kasan_set_track+0x25/0x30 [ 31.166418] __kasan_slab_alloc+0x59/0x70 [ 31.166958] kmem_cache_alloc+0x16b/0x370 [ 31.167494] vm_area_dup+0x20/0x160 [ 31.167973] __split_vma+0x170/0x950 [ 31.168443] split_vma+0xc6/0x110 [ 31.168902] mprotect_fixup+0x8d2/0xb30 [ 31.169406] do_mprotect_pkey+0x87e/0xd40 [ 31.169936] __x64_sys_mprotect+0x78/0xc0 [ 31.170458] do_syscall_64+0x3f/0x90 [ 31.170948] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.171615] [ 31.171838] Freed by task 212: [ 31.172229] kasan_save_stack+0x22/0x50 [ 31.172737] kasan_set_track+0x25/0x30 [ 31.173237] kasan_save_free_info+0x2b/0x50 [ 31.173770] __kasan_slab_free+0x10a/0x190 [ 31.174306] kmem_cache_free+0x10d/0x4d0 [ 31.174827] rcu_core+0x8c8/0x2860 [ 31.175289] __do_softirq+0x1b7/0x7d4 [ 31.175773] [ 31.175991] Last potentially related work creation: [ 31.176574] kasan_save_stack+0x22/0x50 [ 31.177072] __kasan_record_aux_stack+0x8e/0xa0 [ 31.177646] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.178314] remove_vma+0x139/0x170 [ 31.178767] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.179331] do_vmi_munmap+0x1f1/0x2b0 [ 31.179818] __vm_munmap+0x138/0x3a0 [ 31.180283] __x64_sys_munmap+0x59/0x80 [ 31.180780] do_syscall_64+0x3f/0x90 [ 31.181264] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.181907] [ 31.182121] Second to last potentially related work creation: [ 31.182806] kasan_save_stack+0x22/0x50 [ 31.183327] __kasan_record_aux_stack+0x8e/0xa0 [ 31.183902] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.184542] remove_vma+0x139/0x170 [ 31.185006] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.185575] do_vmi_munmap+0x1f1/0x2b0 [ 31.186059] mmap_region+0x1f9/0x2660 [ 31.186536] do_mmap+0x854/0xf00 [ 31.186977] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.187474] ksys_mmap_pgoff+0x3af/0x500 [ 31.187975] do_syscall_64+0x3f/0x90 [ 31.188454] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.189113] [ 31.189328] The buggy address belongs to the object at ffff88800d8a50e8 [ 31.189328] which belongs to the cache vm_area_struct of size 168 [ 31.190814] The buggy address is located 88 bytes inside of [ 31.190814] freed 168-byte region [ffff88800d8a50e8, ffff88800d8a5190) [ 31.192222] [ 31.192441] The buggy address belongs to the physical page: [ 31.193093] page:0000000035b9149e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd8a5 [ 31.194194] memcg:ffff88800e024b01 [ 31.194630] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.195347] page_type: 0xffffffff() [ 31.195800] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.196723] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e024b01 [ 31.197631] page dumped because: kasan: bad access detected [ 31.198297] [ 31.198523] Memory state around the buggy address: [ 31.199129] ffff88800d8a5000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.199931] ffff88800d8a5080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.200738] >ffff88800d8a5100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.201527] ^ [ 31.202130] ffff88800d8a5180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.202950] ffff88800d8a5200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.203765] ================================================================== [ 31.204638] Disabling lock debugging due to kernel taint [ 33.093155] BUG: Bad rss-counter state mm:00000000a2821f3c type:MM_FILEPAGES val:33 [ 33.093936] BUG: Bad rss-counter state mm:00000000a2821f3c type:MM_ANONPAGES val:22 [ 33.524643] BUG: Bad rss-counter state mm:00000000426e28e1 type:MM_FILEPAGES val:33 [ 33.525514] BUG: Bad rss-counter state mm:00000000426e28e1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12852' (ECDSA) to the list of known hosts. 2023/06/20 15:18:32 fuzzer started 2023/06/20 15:18:32 dialing manager at localhost:36067 2023/06/20 15:18:32 checking machine... 2023/06/20 15:18:32 checking revisions... [ 34.262725] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:18:32 testing simple program... [ 34.307289] cgroup: Unknown subsys name 'net' [ 34.360828] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:18:32 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f573bc09000 RCX=0000000000000000 RDX=ffff888016603680 RSI=00007f573bc08fff RDI=ffff888016fcfe70 RBP=0000000000000000 RSP=ffff888016fcfdd0 R8 =0000000000000006 R9 =00007f573bc02000 R10=00007f573bc09000 R11=0000000000000000 R12=00007f573bc02000 R13=ffff888016fcfe70 R14=ffff888015cd65c0 R15=ffff888016fcfe50 RIP=ffffffff844b8730 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 00007f573bc48900 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=00007f573bc08008 CR3=000000000ea80000 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=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 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=ffff888008c04400 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=00007f8b65e7d380 CR3=000000000ca1c000 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=38313a3531203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323337 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000