syzkaller login: [ 32.674754] BUG: Bad rss-counter state mm:00000000111de014 type:MM_FILEPAGES val:33 [ 32.676041] BUG: Bad rss-counter state mm:00000000111de014 type:MM_ANONPAGES val:22 [ 32.833754] ================================================================== [ 32.834682] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.835617] Read of size 8 at addr ffff88801962e968 by task sshd/221 [ 32.836496] [ 32.836720] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.837585] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.838596] Call Trace: [ 32.838919] [ 32.839207] dump_stack_lvl+0x91/0xf0 [ 32.839694] print_report+0xcc/0x620 [ 32.840179] ? __virt_addr_valid+0x102/0x340 [ 32.840750] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.841360] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.841981] kasan_report+0xbe/0xf0 [ 32.842459] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.843092] vma_interval_tree_remove+0xc75/0xec0 [ 32.843703] vma_prepare+0xc54/0x11a0 [ 32.844185] __split_vma+0x5af/0x950 [ 32.844672] ? __pfx___split_vma+0x10/0x10 [ 32.845203] ? find_held_lock+0x2c/0x110 [ 32.845727] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.846303] ? lock_is_held_type+0x9f/0x120 [ 32.846846] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.847453] ? mtree_range_walk+0x632/0x900 [ 32.847998] ? mas_walk+0x5c7/0x7c0 [ 32.848469] do_vmi_munmap+0x1f1/0x2b0 [ 32.848963] mmap_region+0x1f9/0x2660 [ 32.849447] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.849956] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.850678] ? __pfx_lock_acquire+0x10/0x10 [ 32.851210] ? __pfx_mmap_region+0x10/0x10 [ 32.851742] ? security_mmap_addr+0x7d/0xa0 [ 32.852264] ? get_unmapped_area+0x1f5/0x3f0 [ 32.852830] do_mmap+0x854/0xf00 [ 32.853268] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.853760] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.854318] ksys_mmap_pgoff+0x3af/0x500 [ 32.854819] do_syscall_64+0x3f/0x90 [ 32.855297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.855940] RIP: 0033:0x7fe256407d82 [ 32.856393] 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 [ 32.858517] RSP: 002b:00007ffd265ccd68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.859419] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe256407d82 [ 32.860277] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe255841000 [ 32.861148] RBP: 00007fe255841000 R08: 0000000000000009 R09: 0000000000001000 [ 32.861998] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bb4c105ec0 [ 32.862839] R13: 00007ffd265ccd80 R14: 00007ffd265ccdb0 R15: 00007ffd265cd110 [ 32.863694] [ 32.863985] [ 32.864203] Allocated by task 214: [ 32.864640] kasan_save_stack+0x22/0x50 [ 32.865157] kasan_set_track+0x25/0x30 [ 32.865659] __kasan_slab_alloc+0x59/0x70 [ 32.866181] kmem_cache_alloc+0x16b/0x370 [ 32.866700] vm_area_dup+0x20/0x160 [ 32.867155] __split_vma+0x170/0x950 [ 32.867618] split_vma+0xc6/0x110 [ 32.868065] mprotect_fixup+0x8d2/0xb30 [ 32.868571] do_mprotect_pkey+0x87e/0xd40 [ 32.869105] __x64_sys_mprotect+0x78/0xc0 [ 32.869632] do_syscall_64+0x3f/0x90 [ 32.870106] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.870745] [ 32.870963] Freed by task 214: [ 32.871357] kasan_save_stack+0x22/0x50 [ 32.871862] kasan_set_track+0x25/0x30 [ 32.872354] kasan_save_free_info+0x2b/0x50 [ 32.872899] __kasan_slab_free+0x10a/0x190 [ 32.873434] kmem_cache_free+0x10d/0x4d0 [ 32.873944] rcu_core+0x8c8/0x2860 [ 32.874389] __do_softirq+0x1b7/0x7d4 [ 32.874870] [ 32.875084] Last potentially related work creation: [ 32.875676] kasan_save_stack+0x22/0x50 [ 32.876178] __kasan_record_aux_stack+0x8e/0xa0 [ 32.876767] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.877407] remove_vma+0x139/0x170 [ 32.877855] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.878415] do_vmi_munmap+0x1f1/0x2b0 [ 32.878897] __vm_munmap+0x138/0x3a0 [ 32.879362] __x64_sys_munmap+0x59/0x80 [ 32.879860] do_syscall_64+0x3f/0x90 [ 32.880334] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.880994] [ 32.881214] The buggy address belongs to the object at ffff88801962e910 [ 32.881214] which belongs to the cache vm_area_struct of size 168 [ 32.882685] The buggy address is located 88 bytes inside of [ 32.882685] freed 168-byte region [ffff88801962e910, ffff88801962e9b8) [ 32.884087] [ 32.884308] The buggy address belongs to the physical page: [ 32.885016] page:00000000126e509a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1962e [ 32.886188] memcg:ffff888015bd8501 [ 32.886645] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.887344] page_type: 0xffffffff() [ 32.887809] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.888791] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015bd8501 [ 32.889739] page dumped because: kasan: bad access detected [ 32.890418] [ 32.890639] Memory state around the buggy address: [ 32.891242] ffff88801962e800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 32.892139] ffff88801962e880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 32.893040] >ffff88801962e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.893923] ^ [ 32.894768] ffff88801962e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 32.895664] ffff88801962ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.896552] ================================================================== [ 32.897649] Disabling lock debugging due to kernel taint [ 35.225940] BUG: Bad rss-counter state mm:00000000e20eca01 type:MM_FILEPAGES val:33 [ 35.226680] BUG: Bad rss-counter state mm:00000000e20eca01 type:MM_ANONPAGES val:22 [ 35.637022] BUG: Bad rss-counter state mm:00000000e6fed03d type:MM_FILEPAGES val:33 [ 35.638686] BUG: Bad rss-counter state mm:00000000e6fed03d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55738' (ECDSA) to the list of known hosts. 2023/06/20 04:16:35 fuzzer started 2023/06/20 04:16:36 dialing manager at localhost:44161 2023/06/20 04:16:36 checking machine... 2023/06/20 04:16:36 checking revisions... [ 36.357163] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:16:36 testing simple program... [ 36.402374] cgroup: Unknown subsys name 'net' [ 36.443129] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:16:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11003078efd RSI=ffffffff8363fc83 RDI=ffff8880183c77e8 RBP=ffff8880183c7880 RSP=ffff8880183c7778 R8 =0000000000000001 R9 =ffff8880183c7828 R10=0000000000038001 R11=000000000008aa2a R12=ffff8880183c78b0 R13=0000000000000000 R14=ffff888016eed1c0 R15=ffff8880183c77e8 RIP=ffffffff8113060b 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 00007f8bbf2ae900 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=00007f8bbf863650 CR3=000000001a142000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffdaf2b3ec8 CR3=0000000013664000 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=2035333a36313a3430203032206e754a XMM01=657463656e6e6f63736944203a5d3233 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3233325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a36313a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000