syzkaller login: [ 30.104642] BUG: Bad rss-counter state mm:00000000b49f3c9d type:MM_FILEPAGES val:33 [ 30.106391] BUG: Bad rss-counter state mm:00000000b49f3c9d type:MM_ANONPAGES val:22 [ 30.246991] ================================================================== [ 30.247846] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.248736] Read of size 8 at addr ffff888017d78a50 by task sshd/219 [ 30.249462] [ 30.249669] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.250615] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.251524] Call Trace: [ 30.251832] [ 30.252218] dump_stack_lvl+0x91/0xf0 [ 30.252788] print_report+0xcc/0x620 [ 30.253347] ? __virt_addr_valid+0x102/0x340 [ 30.254004] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.254709] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.255415] kasan_report+0xbe/0xf0 [ 30.255949] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.256665] vma_interval_tree_remove+0xc75/0xec0 [ 30.257384] vma_prepare+0xc54/0x11a0 [ 30.258056] __split_vma+0x5af/0x950 [ 30.258723] ? __pfx___split_vma+0x10/0x10 [ 30.259465] ? find_held_lock+0x2c/0x110 [ 30.260197] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.260995] ? lock_is_held_type+0x9f/0x120 [ 30.261753] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.262588] ? mtree_range_walk+0x632/0x900 [ 30.263179] ? mas_walk+0x5c7/0x7c0 [ 30.263694] do_vmi_munmap+0x1f1/0x2b0 [ 30.264229] mmap_region+0x1f9/0x2660 [ 30.264753] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.265308] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.266080] ? __pfx_lock_acquire+0x10/0x10 [ 30.266656] ? __pfx_mmap_region+0x10/0x10 [ 30.267231] ? security_mmap_addr+0x7d/0xa0 [ 30.267804] ? get_unmapped_area+0x1f5/0x3f0 [ 30.268401] do_mmap+0x854/0xf00 [ 30.268881] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.269422] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.270093] ksys_mmap_pgoff+0x3af/0x500 [ 30.270712] do_syscall_64+0x3f/0x90 [ 30.271294] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.272083] RIP: 0033:0x7f1c18f70d82 [ 30.272641] 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 [ 30.275281] RSP: 002b:00007ffc4fec80d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.276388] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1c18f70d82 [ 30.277417] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1c183aa000 [ 30.278466] RBP: 00007f1c183aa000 R08: 0000000000000009 R09: 0000000000001000 [ 30.279497] R10: 0000000000000812 R11: 0000000000000206 R12: 000056469db51ec0 [ 30.280534] R13: 00007ffc4fec80f0 R14: 00007ffc4fec8120 R15: 00007ffc4fec8480 [ 30.281581] [ 30.281953] [ 30.282213] Allocated by task 212: [ 30.282743] kasan_save_stack+0x22/0x50 [ 30.283355] kasan_set_track+0x25/0x30 [ 30.283962] __kasan_slab_alloc+0x59/0x70 [ 30.284609] kmem_cache_alloc+0x16b/0x370 [ 30.285243] vm_area_dup+0x20/0x160 [ 30.285800] __split_vma+0x170/0x950 [ 30.286376] split_vma+0xc6/0x110 [ 30.286915] mprotect_fixup+0x8d2/0xb30 [ 30.287532] do_mprotect_pkey+0x87e/0xd40 [ 30.288173] __x64_sys_mprotect+0x78/0xc0 [ 30.288814] do_syscall_64+0x3f/0x90 [ 30.289394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.290208] [ 30.290474] Freed by task 212: [ 30.290955] kasan_save_stack+0x22/0x50 [ 30.291575] kasan_set_track+0x25/0x30 [ 30.292178] kasan_save_free_info+0x2b/0x50 [ 30.292835] __kasan_slab_free+0x10a/0x190 [ 30.293491] kmem_cache_free+0x10d/0x4d0 [ 30.294127] rcu_core+0x8c8/0x2860 [ 30.294677] __do_softirq+0x1b7/0x7d4 [ 30.295265] [ 30.295524] Last potentially related work creation: [ 30.296250] kasan_save_stack+0x22/0x50 [ 30.296869] __kasan_record_aux_stack+0x8e/0xa0 [ 30.297576] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.298374] remove_vma+0x139/0x170 [ 30.298928] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.299611] do_vmi_munmap+0x1f1/0x2b0 [ 30.300209] __vm_munmap+0x138/0x3a0 [ 30.300785] __x64_sys_munmap+0x59/0x80 [ 30.301397] do_syscall_64+0x3f/0x90 [ 30.301996] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.302786] [ 30.303046] The buggy address belongs to the object at ffff888017d789f8 [ 30.303046] which belongs to the cache vm_area_struct of size 168 [ 30.304878] The buggy address is located 88 bytes inside of [ 30.304878] freed 168-byte region [ffff888017d789f8, ffff888017d78aa0) [ 30.306645] [ 30.306915] The buggy address belongs to the physical page: [ 30.307739] page:0000000004295e6f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17d78 [ 30.309107] memcg:ffff888019c1a401 [ 30.309634] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.310444] page_type: 0xffffffff() [ 30.311005] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.312152] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c1a401 [ 30.313286] page dumped because: kasan: bad access detected [ 30.314125] [ 30.314386] Memory state around the buggy address: [ 30.315108] ffff888017d78900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.316172] ffff888017d78980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.317238] >ffff888017d78a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.318306] ^ [ 30.319174] ffff888017d78a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.320237] ffff888017d78b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.321301] ================================================================== [ 30.322611] Disabling lock debugging due to kernel taint [ 32.236714] BUG: Bad rss-counter state mm:00000000d67463ae type:MM_FILEPAGES val:33 [ 32.238363] BUG: Bad rss-counter state mm:00000000d67463ae type:MM_ANONPAGES val:22 [ 32.706199] BUG: Bad rss-counter state mm:00000000bfb3a9c2 type:MM_FILEPAGES val:33 [ 32.707739] BUG: Bad rss-counter state mm:00000000bfb3a9c2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17264' (ECDSA) to the list of known hosts. 2023/06/21 03:49:54 fuzzer started 2023/06/21 03:49:54 dialing manager at localhost:36067 2023/06/21 03:49:54 checking machine... 2023/06/21 03:49:54 checking revisions... [ 33.394384] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:49:54 testing simple program... [ 33.443349] cgroup: Unknown subsys name 'net' [ 33.501553] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:49:54 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff86138e01 RDX=1ffff1100d9c135b RSI=ffffffff8180c705 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86138e90 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff811306da RFL=00000212 [----A--] 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=00007fbc82350a40 CR3=000000000f0a8000 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=2034353a39343a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a39343a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88800f309b40 RCX=ffff88800f700000 RDX=ffff88800f6ff158 RSI=ffff88800f309b40 RDI=ffff88800f6ff108 RBP=ffff88800f6ff158 RSP=ffff88800f6ff0c0 R8 =0000000000000001 R9 =0000000000000000 R10=ffff88800f6ff158 R11=00000000000b6a61 R12=ffff88800f6ff108 R13=ffff88800f6ff180 R14=ffff88800f6ff1a0 R15=ffff88800f6ff158 RIP=ffffffff8450e1ac RFL=00000212 [----A--] 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 00007f6dc1cb6900 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=00007f6dc1c95020 CR3=0000000014726000 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