syzkaller login: [ 30.943777] BUG: Bad rss-counter state mm:000000000a54fbfa type:MM_FILEPAGES val:33 [ 30.944791] BUG: Bad rss-counter state mm:000000000a54fbfa type:MM_ANONPAGES val:22 [ 31.108832] ================================================================== [ 31.109744] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.110684] Read of size 8 at addr ffff88800d9c0140 by task sshd/220 [ 31.111461] [ 31.111679] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.112657] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.113623] Call Trace: [ 31.113946] [ 31.114233] dump_stack_lvl+0x91/0xf0 [ 31.114726] print_report+0xcc/0x620 [ 31.115210] ? __virt_addr_valid+0x102/0x340 [ 31.115766] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.116409] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.117026] kasan_report+0xbe/0xf0 [ 31.117515] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.118133] vma_interval_tree_remove+0xc75/0xec0 [ 31.118732] vma_prepare+0xc54/0x11a0 [ 31.119219] __split_vma+0x5af/0x950 [ 31.119692] ? __pfx___split_vma+0x10/0x10 [ 31.120239] ? find_held_lock+0x2c/0x110 [ 31.120752] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.121320] ? lock_is_held_type+0x9f/0x120 [ 31.121858] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.122467] ? mtree_range_walk+0x632/0x900 [ 31.123019] ? mas_walk+0x5c7/0x7c0 [ 31.123494] do_vmi_munmap+0x1f1/0x2b0 [ 31.123987] mmap_region+0x1f9/0x2660 [ 31.124489] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.125000] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.125710] ? __pfx_lock_acquire+0x10/0x10 [ 31.126244] ? __pfx_mmap_region+0x10/0x10 [ 31.126766] ? security_mmap_addr+0x7d/0xa0 [ 31.127298] ? get_unmapped_area+0x1f5/0x3f0 [ 31.127844] do_mmap+0x854/0xf00 [ 31.128302] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.128799] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.129360] ksys_mmap_pgoff+0x3af/0x500 [ 31.129864] do_syscall_64+0x3f/0x90 [ 31.130354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.131003] RIP: 0033:0x7f993ca0cd82 [ 31.131455] 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 [ 31.133575] RSP: 002b:00007fff2800d048 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.134483] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f993ca0cd82 [ 31.135328] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f993be46000 [ 31.136172] RBP: 00007f993be46000 R08: 0000000000000009 R09: 0000000000001000 [ 31.137012] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f627522ec0 [ 31.137847] R13: 00007fff2800d060 R14: 00007fff2800d090 R15: 00007fff2800d3f0 [ 31.138700] [ 31.138989] [ 31.139202] Allocated by task 213: [ 31.139629] kasan_save_stack+0x22/0x50 [ 31.140144] kasan_set_track+0x25/0x30 [ 31.140638] __kasan_slab_alloc+0x59/0x70 [ 31.141158] kmem_cache_alloc+0x16b/0x370 [ 31.141676] vm_area_dup+0x20/0x160 [ 31.142131] __split_vma+0x170/0x950 [ 31.142598] split_vma+0xc6/0x110 [ 31.143041] mprotect_fixup+0x8d2/0xb30 [ 31.143541] do_mprotect_pkey+0x87e/0xd40 [ 31.144055] __x64_sys_mprotect+0x78/0xc0 [ 31.144595] do_syscall_64+0x3f/0x90 [ 31.145067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.145710] [ 31.145931] Freed by task 213: [ 31.146324] kasan_save_stack+0x22/0x50 [ 31.146822] kasan_set_track+0x25/0x30 [ 31.147318] kasan_save_free_info+0x2b/0x50 [ 31.147848] __kasan_slab_free+0x10a/0x190 [ 31.148388] kmem_cache_free+0x10d/0x4d0 [ 31.148896] rcu_core+0x8c8/0x2860 [ 31.149336] __do_softirq+0x1b7/0x7d4 [ 31.149806] [ 31.150024] Last potentially related work creation: [ 31.150604] kasan_save_stack+0x22/0x50 [ 31.151109] __kasan_record_aux_stack+0x8e/0xa0 [ 31.151679] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.152316] remove_vma+0x139/0x170 [ 31.152765] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.153313] do_vmi_munmap+0x1f1/0x2b0 [ 31.153796] __vm_munmap+0x138/0x3a0 [ 31.154265] __x64_sys_munmap+0x59/0x80 [ 31.154758] do_syscall_64+0x3f/0x90 [ 31.155231] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.155871] [ 31.156105] The buggy address belongs to the object at ffff88800d9c00e8 [ 31.156105] which belongs to the cache vm_area_struct of size 168 [ 31.157556] The buggy address is located 88 bytes inside of [ 31.157556] freed 168-byte region [ffff88800d9c00e8, ffff88800d9c0190) [ 31.158945] [ 31.159159] The buggy address belongs to the physical page: [ 31.159833] page:000000002c035a08 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd9c0 [ 31.160924] memcg:ffff88800ca91101 [ 31.161346] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.162004] page_type: 0xffffffff() [ 31.162458] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c3dc0 dead00000000000a [ 31.163375] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca91101 [ 31.164305] page dumped because: kasan: bad access detected [ 31.164978] [ 31.165193] Memory state around the buggy address: [ 31.165778] ffff88800d9c0000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.166638] ffff88800d9c0080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.167498] >ffff88800d9c0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.168378] ^ [ 31.169014] ffff88800d9c0180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.169872] ffff88800d9c0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.170713] ================================================================== [ 31.171670] Disabling lock debugging due to kernel taint [ 33.771909] BUG: Bad rss-counter state mm:00000000ff71a158 type:MM_FILEPAGES val:33 [ 33.772906] BUG: Bad rss-counter state mm:00000000ff71a158 type:MM_ANONPAGES val:22 [ 34.253557] BUG: Bad rss-counter state mm:000000005fb61327 type:MM_FILEPAGES val:33 [ 34.254565] BUG: Bad rss-counter state mm:000000005fb61327 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49801' (ECDSA) to the list of known hosts. 2023/06/21 02:04:29 fuzzer started 2023/06/21 02:04:29 dialing manager at localhost:36067 2023/06/21 02:04:29 checking machine... 2023/06/21 02:04:29 checking revisions... [ 34.953687] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:04:29 testing simple program... [ 34.997903] cgroup: Unknown subsys name 'net' [ 35.072443] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:04:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800e33d800 RCX=ffff88800e33d800 RDX=0000000080100006 RSI=ffff88800e33d800 RDI=ffff8880084c6140 RBP=ffff888017adf858 RSP=ffff888017adf7c0 R8 =0000000080100005 R9 =0000000000000000 R10=ffffea000038cf00 R11=00000000802e002c R12=ffffea000038cf00 R13=ffff88800e33ca00 R14=0000000080100005 R15=ffff8880084c6140 RIP=ffffffff81809672 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 00007f896ba98700 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=00007fb4f249aee0 CR3=000000000dae0000 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=2039323a34303a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a34303a3230203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110018d940b RBX=ffff88800c6ca058 RCX=ffff88800c6ca008 RDX=ffff88801627d1c0 RSI=ffffffff844b4ee7 RDI=0000000000000000 RBP=000000000000000a RSP=ffff88801caa7b10 R8 =0000000000000000 R9 =000000000000000a R10=000000000000000d R11=0000000000000000 R12=000000000000000d R13=ffff88800c6ca000 R14=dffffc0000000000 R15=ffff88801caa7e70 RIP=ffffffff844b4f00 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 00007f94fd4ea900 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=00007f94fd4b9008 CR3=000000001682c000 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=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