syzkaller login: [ 30.922771] BUG: Bad rss-counter state mm:00000000743d2f1b type:MM_FILEPAGES val:33 [ 30.924908] BUG: Bad rss-counter state mm:00000000743d2f1b type:MM_ANONPAGES val:22 [ 31.096573] ================================================================== [ 31.097639] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.098744] Read of size 8 at addr ffff88800971a140 by task sshd/221 [ 31.099773] [ 31.100058] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.101052] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.102044] Call Trace: [ 31.102361] [ 31.102647] dump_stack_lvl+0x91/0xf0 [ 31.103138] print_report+0xcc/0x620 [ 31.103622] ? __virt_addr_valid+0x102/0x340 [ 31.104195] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.104811] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.105430] kasan_report+0xbe/0xf0 [ 31.105907] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.106518] vma_interval_tree_remove+0xc75/0xec0 [ 31.107115] vma_prepare+0xc54/0x11a0 [ 31.107589] __split_vma+0x5af/0x950 [ 31.108065] ? __pfx___split_vma+0x10/0x10 [ 31.108589] ? find_held_lock+0x2c/0x110 [ 31.109109] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.109675] ? lock_is_held_type+0x9f/0x120 [ 31.110214] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.110817] ? mtree_range_walk+0x632/0x900 [ 31.111367] ? mas_walk+0x5c7/0x7c0 [ 31.111843] do_vmi_munmap+0x1f1/0x2b0 [ 31.112361] mmap_region+0x1f9/0x2660 [ 31.112844] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.113348] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.114052] ? __pfx_lock_acquire+0x10/0x10 [ 31.114587] ? __pfx_mmap_region+0x10/0x10 [ 31.115110] ? security_mmap_addr+0x7d/0xa0 [ 31.115638] ? get_unmapped_area+0x1f5/0x3f0 [ 31.116199] do_mmap+0x854/0xf00 [ 31.116640] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.117129] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.117683] ksys_mmap_pgoff+0x3af/0x500 [ 31.118186] do_syscall_64+0x3f/0x90 [ 31.118662] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.119301] RIP: 0033:0x7f9549befd82 [ 31.119757] 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 [ 31.121865] RSP: 002b:00007ffd2132a8e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.122766] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9549befd82 [ 31.123608] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9549029000 [ 31.124474] RBP: 00007f9549029000 R08: 0000000000000009 R09: 0000000000001000 [ 31.125314] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fd58903ec0 [ 31.126152] R13: 00007ffd2132a900 R14: 00007ffd2132a930 R15: 00007ffd2132ac90 [ 31.127006] [ 31.127294] [ 31.127507] Allocated by task 214: [ 31.127937] kasan_save_stack+0x22/0x50 [ 31.128444] kasan_set_track+0x25/0x30 [ 31.128933] __kasan_slab_alloc+0x59/0x70 [ 31.129454] kmem_cache_alloc+0x16b/0x370 [ 31.129962] vm_area_dup+0x20/0x160 [ 31.130417] __split_vma+0x170/0x950 [ 31.130880] split_vma+0xc6/0x110 [ 31.131324] mprotect_fixup+0x8d2/0xb30 [ 31.131825] do_mprotect_pkey+0x87e/0xd40 [ 31.132348] __x64_sys_mprotect+0x78/0xc0 [ 31.132861] do_syscall_64+0x3f/0x90 [ 31.133332] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.133965] [ 31.134177] Freed by task 214: [ 31.134566] kasan_save_stack+0x22/0x50 [ 31.135063] kasan_set_track+0x25/0x30 [ 31.135548] kasan_save_free_info+0x2b/0x50 [ 31.136098] __kasan_slab_free+0x10a/0x190 [ 31.136630] kmem_cache_free+0x10d/0x4d0 [ 31.137138] rcu_core+0x8c8/0x2860 [ 31.137580] __do_softirq+0x1b7/0x7d4 [ 31.138060] [ 31.138274] Last potentially related work creation: [ 31.138857] kasan_save_stack+0x22/0x50 [ 31.139361] __kasan_record_aux_stack+0x8e/0xa0 [ 31.139940] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.140574] remove_vma+0x139/0x170 [ 31.141021] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.141570] do_vmi_munmap+0x1f1/0x2b0 [ 31.142056] __vm_munmap+0x138/0x3a0 [ 31.142518] __x64_sys_munmap+0x59/0x80 [ 31.143011] do_syscall_64+0x3f/0x90 [ 31.143483] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.144138] [ 31.144353] The buggy address belongs to the object at ffff88800971a0e8 [ 31.144353] which belongs to the cache vm_area_struct of size 168 [ 31.145813] The buggy address is located 88 bytes inside of [ 31.145813] freed 168-byte region [ffff88800971a0e8, ffff88800971a190) [ 31.147211] [ 31.147423] The buggy address belongs to the physical page: [ 31.148089] page:00000000702d01d1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x971a [ 31.149164] memcg:ffff88800ddef601 [ 31.149583] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.150271] page_type: 0xffffffff() [ 31.150717] raw: 0100000000000200 ffff8880087a0c80 ffffea000038ad40 dead000000000007 [ 31.151639] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddef601 [ 31.152562] page dumped because: kasan: bad access detected [ 31.153225] [ 31.153438] Memory state around the buggy address: [ 31.154012] ffff88800971a000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.154860] ffff88800971a080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.155704] >ffff88800971a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.156555] ^ [ 31.157186] ffff88800971a180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 31.158077] ffff88800971a200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.158959] ================================================================== [ 31.160174] Disabling lock debugging due to kernel taint [ 33.708972] BUG: Bad rss-counter state mm:0000000021fe424b type:MM_FILEPAGES val:33 [ 33.709713] BUG: Bad rss-counter state mm:0000000021fe424b type:MM_ANONPAGES val:22 [ 34.070204] BUG: Bad rss-counter state mm:00000000c53ea540 type:MM_FILEPAGES val:33 [ 34.070834] BUG: Bad rss-counter state mm:00000000c53ea540 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24418' (ECDSA) to the list of known hosts. 2023/06/20 15:42:12 fuzzer started 2023/06/20 15:42:12 dialing manager at localhost:36067 2023/06/20 15:42:12 checking machine... 2023/06/20 15:42:12 checking revisions... [ 34.631702] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:42:12 testing simple program... [ 34.668059] cgroup: Unknown subsys name 'net' [ 34.700882] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:42:12 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f6c8b091680 CR3=00000000145c4000 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=2032313a32343a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a32343a3531203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffea00006e2440 RCX=ffffffff81764212 RDX=fffff940000dc489 RSI=0000000000000008 RDI=ffffea00006e2440 RBP=ffffea00006e2440 RSP=ffff88801a8e7bb8 R8 =0000000000000000 R9 =fffff940000dc488 R10=ffffea00006e2447 R11=0000000000000000 R12=ffff888016309658 R13=0000000000000000 R14=ffff88800e35a000 R15=ffffea00006e2440 RIP=ffffffff8180f135 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa10be80900 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=00007fa10c24c328 CR3=000000000e8c4000 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