syzkaller login: [ 30.934850] BUG: Bad rss-counter state mm:00000000dd59717c type:MM_FILEPAGES val:33 [ 30.935915] BUG: Bad rss-counter state mm:00000000dd59717c type:MM_ANONPAGES val:22 [ 31.101178] ================================================================== [ 31.102115] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.103078] Read of size 8 at addr ffff888015a2c5c8 by task sshd/221 [ 31.103880] [ 31.104096] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.105213] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.106213] Call Trace: [ 31.106541] [ 31.106829] dump_stack_lvl+0x91/0xf0 [ 31.107333] print_report+0xcc/0x620 [ 31.107840] ? __virt_addr_valid+0x102/0x340 [ 31.108410] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.109030] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.109682] kasan_report+0xbe/0xf0 [ 31.110175] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.110811] vma_interval_tree_remove+0xc75/0xec0 [ 31.111443] vma_prepare+0xc54/0x11a0 [ 31.111936] __split_vma+0x5af/0x950 [ 31.112423] ? __pfx___split_vma+0x10/0x10 [ 31.112951] ? find_held_lock+0x2c/0x110 [ 31.113500] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.114069] ? lock_is_held_type+0x9f/0x120 [ 31.114621] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.115242] ? mtree_range_walk+0x632/0x900 [ 31.115807] ? mas_walk+0x5c7/0x7c0 [ 31.116301] do_vmi_munmap+0x1f1/0x2b0 [ 31.116798] mmap_region+0x1f9/0x2660 [ 31.117306] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.117822] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.118557] ? __pfx_lock_acquire+0x10/0x10 [ 31.119095] ? __pfx_mmap_region+0x10/0x10 [ 31.119662] ? security_mmap_addr+0x7d/0xa0 [ 31.120217] ? get_unmapped_area+0x1f5/0x3f0 [ 31.120777] do_mmap+0x854/0xf00 [ 31.121241] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.121736] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.122326] ksys_mmap_pgoff+0x3af/0x500 [ 31.122836] do_syscall_64+0x3f/0x90 [ 31.123332] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.123986] RIP: 0033:0x7f319f228d82 [ 31.124457] 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 [ 31.126664] RSP: 002b:00007ffe25081458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.127751] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f319f228d82 [ 31.128758] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f319e662000 [ 31.129624] RBP: 00007f319e662000 R08: 0000000000000009 R09: 0000000000001000 [ 31.130509] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562744499d90 [ 31.131373] R13: 00007ffe25081470 R14: 00007ffe250814a0 R15: 00007ffe25081800 [ 31.132268] [ 31.132562] [ 31.132783] Allocated by task 214: [ 31.133237] kasan_save_stack+0x22/0x50 [ 31.133757] kasan_set_track+0x25/0x30 [ 31.134259] __kasan_slab_alloc+0x59/0x70 [ 31.134781] kmem_cache_alloc+0x16b/0x370 [ 31.135325] vm_area_dup+0x20/0x160 [ 31.135803] __split_vma+0x170/0x950 [ 31.136288] split_vma+0xc6/0x110 [ 31.136732] mprotect_fixup+0x8d2/0xb30 [ 31.137249] do_mprotect_pkey+0x87e/0xd40 [ 31.137774] __x64_sys_mprotect+0x78/0xc0 [ 31.138306] do_syscall_64+0x3f/0x90 [ 31.138798] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.139481] [ 31.139724] Freed by task 214: [ 31.140114] kasan_save_stack+0x22/0x50 [ 31.140654] kasan_set_track+0x25/0x30 [ 31.141166] kasan_save_free_info+0x2b/0x50 [ 31.141888] __kasan_slab_free+0x10a/0x190 [ 31.142514] kmem_cache_free+0x10d/0x4d0 [ 31.143034] rcu_core+0x8c8/0x2860 [ 31.143497] __do_softirq+0x1b7/0x7d4 [ 31.143999] [ 31.144249] Last potentially related work creation: [ 31.144848] kasan_save_stack+0x22/0x50 [ 31.145371] __kasan_record_aux_stack+0x8e/0xa0 [ 31.145950] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.146647] remove_vma+0x139/0x170 [ 31.147104] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.147703] do_vmi_munmap+0x1f1/0x2b0 [ 31.148222] __vm_munmap+0x138/0x3a0 [ 31.148710] __x64_sys_munmap+0x59/0x80 [ 31.149230] do_syscall_64+0x3f/0x90 [ 31.149710] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.150366] [ 31.150588] The buggy address belongs to the object at ffff888015a2c570 [ 31.150588] which belongs to the cache vm_area_struct of size 168 [ 31.152087] The buggy address is located 88 bytes inside of [ 31.152087] freed 168-byte region [ffff888015a2c570, ffff888015a2c618) [ 31.153539] [ 31.153757] The buggy address belongs to the physical page: [ 31.154433] page:00000000434f5123 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a2c [ 31.155559] memcg:ffff88800ce89201 [ 31.155999] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.156681] page_type: 0xffffffff() [ 31.157145] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.158085] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ce89201 [ 31.159005] page dumped because: kasan: bad access detected [ 31.159694] [ 31.159910] Memory state around the buggy address: [ 31.160521] ffff888015a2c480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.161396] ffff888015a2c500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.162275] >ffff888015a2c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.163137] ^ [ 31.163841] ffff888015a2c600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.164723] ffff888015a2c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.165608] ================================================================== [ 31.166696] Disabling lock debugging due to kernel taint [ 34.058407] BUG: Bad rss-counter state mm:00000000d2471c7c type:MM_FILEPAGES val:33 [ 34.059559] BUG: Bad rss-counter state mm:00000000d2471c7c type:MM_ANONPAGES val:22 [ 34.487622] BUG: Bad rss-counter state mm:00000000c574dc4b type:MM_FILEPAGES val:33 [ 34.488702] BUG: Bad rss-counter state mm:00000000c574dc4b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56714' (ECDSA) to the list of known hosts. 2023/06/20 17:46:02 fuzzer started 2023/06/20 17:46:02 dialing manager at localhost:36067 2023/06/20 17:46:02 checking machine... 2023/06/20 17:46:02 checking revisions... [ 35.194383] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:46:03 testing simple program... [ 35.236153] cgroup: Unknown subsys name 'net' [ 35.275519] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:46:02 Registers: info registers vcpu 0 RAX=ffffffff85dfe608 RBX=ffffffff85dfe5ec RCX=ffffffff8180f5ba RDX=0000000000000000 RSI=ffffffff8613971a RDI=ffffffff85dfe5d0 RBP=ffffffff85dfe5f0 RSP=ffff88806ce099e0 R8 =ffffffff8613971a R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020f03 R12=ffffffff85dfe608 R13=ffffffff85dfe5d0 R14=ffffffff85dfe5ec R15=dffffc0000000000 RIP=ffffffff8112fc5a RFL=00000206 [-----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 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=00007f0544344aa0 CR3=000000000e434000 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=54e4e2fd7b3716a0c246a03b6e0d9811 XMM02=000000000011b548eff9b2d0a8fce9cb XMM03=000000000011b6182c67c8bc2e329bc3 XMM04=52821302d4ab249700000000000ae988 XMM05=b2a98a2b3bc99a9c0000000000132610 XMM06=00c3ffa147b8d8570000000000132008 XMM07=e042d86d42eb936e0000000000122528 XMM08=77fb1201ac76fe56000000000011b618 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=00000000ffffffff RCX=ffffffff81210e5e RDX=00000000ffffffff RSI=0000000000000000 RDI=0000000000000005 RBP=ffffffff85c58c00 RSP=ffff888015d2fbf8 R8 =0000000000000005 R9 =0000000000000000 R10=00000000ffffffff R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000001 R14=ffff888015d2fd28 R15=ffffffff85ba4d98 RIP=ffffffff814c0250 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 00007f715fd22900 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=00007ffd4e505000 CR3=0000000009978000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000