syzkaller login: [ 38.160987] BUG: Bad rss-counter state mm:0000000070b9c5b4 type:MM_FILEPAGES val:33 [ 38.162003] BUG: Bad rss-counter state mm:0000000070b9c5b4 type:MM_ANONPAGES val:22 [ 38.328270] ================================================================== [ 38.329192] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.330148] Read of size 8 at addr ffff88800d4654e0 by task sshd/220 [ 38.330941] [ 38.331163] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.332241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.333228] Call Trace: [ 38.333568] [ 38.333850] dump_stack_lvl+0x91/0xf0 [ 38.334364] print_report+0xcc/0x620 [ 38.334859] ? __virt_addr_valid+0x102/0x340 [ 38.335446] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.336088] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.336723] kasan_report+0xbe/0xf0 [ 38.337215] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.337859] vma_interval_tree_remove+0xc75/0xec0 [ 38.338469] vma_prepare+0xc54/0x11a0 [ 38.338964] __split_vma+0x5af/0x950 [ 38.339450] ? __pfx___split_vma+0x10/0x10 [ 38.339997] ? find_held_lock+0x2c/0x110 [ 38.340541] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.341110] ? lock_is_held_type+0x9f/0x120 [ 38.341660] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.342276] ? mtree_range_walk+0x632/0x900 [ 38.342851] ? mas_walk+0x5c7/0x7c0 [ 38.343356] do_vmi_munmap+0x1f1/0x2b0 [ 38.343860] mmap_region+0x1f9/0x2660 [ 38.344347] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.344860] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.345581] ? __pfx_lock_acquire+0x10/0x10 [ 38.346116] ? __pfx_mmap_region+0x10/0x10 [ 38.346666] ? security_mmap_addr+0x7d/0xa0 [ 38.347194] ? get_unmapped_area+0x1f5/0x3f0 [ 38.347757] do_mmap+0x854/0xf00 [ 38.348206] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.348703] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.349275] ksys_mmap_pgoff+0x3af/0x500 [ 38.349791] do_syscall_64+0x3f/0x90 [ 38.350271] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.350923] RIP: 0033:0x7f55a1487d82 [ 38.351389] 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 [ 38.353521] RSP: 002b:00007ffebf26ec38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.354426] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f55a1487d82 [ 38.355298] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f55a08c1000 [ 38.356156] RBP: 00007f55a08c1000 R08: 0000000000000009 R09: 0000000000001000 [ 38.357002] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b01e0c2ec0 [ 38.357862] R13: 00007ffebf26ec50 R14: 00007ffebf26ec80 R15: 00007ffebf26efe0 [ 38.358718] [ 38.359020] [ 38.359239] Allocated by task 213: [ 38.359680] kasan_save_stack+0x22/0x50 [ 38.360196] kasan_set_track+0x25/0x30 [ 38.360690] __kasan_slab_alloc+0x59/0x70 [ 38.361225] kmem_cache_alloc+0x16b/0x370 [ 38.361743] vm_area_dup+0x20/0x160 [ 38.362210] __split_vma+0x170/0x950 [ 38.362685] split_vma+0xc6/0x110 [ 38.363132] mprotect_fixup+0x8d2/0xb30 [ 38.363664] do_mprotect_pkey+0x87e/0xd40 [ 38.364188] __x64_sys_mprotect+0x78/0xc0 [ 38.364722] do_syscall_64+0x3f/0x90 [ 38.365208] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.365860] [ 38.366074] Freed by task 13: [ 38.366456] kasan_save_stack+0x22/0x50 [ 38.366967] kasan_set_track+0x25/0x30 [ 38.367473] kasan_save_free_info+0x2b/0x50 [ 38.368012] __kasan_slab_free+0x10a/0x190 [ 38.368549] kmem_cache_free+0x10d/0x4d0 [ 38.369065] rcu_core+0x8c8/0x2860 [ 38.369515] __do_softirq+0x1b7/0x7d4 [ 38.369997] [ 38.370216] Last potentially related work creation: [ 38.370799] kasan_save_stack+0x22/0x50 [ 38.371332] __kasan_record_aux_stack+0x8e/0xa0 [ 38.371919] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.372561] remove_vma+0x139/0x170 [ 38.373015] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.373576] do_vmi_munmap+0x1f1/0x2b0 [ 38.374072] __vm_munmap+0x138/0x3a0 [ 38.374540] __x64_sys_munmap+0x59/0x80 [ 38.375044] do_syscall_64+0x3f/0x90 [ 38.375530] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.376180] [ 38.376395] The buggy address belongs to the object at ffff88800d465488 [ 38.376395] which belongs to the cache vm_area_struct of size 168 [ 38.377874] The buggy address is located 88 bytes inside of [ 38.377874] freed 168-byte region [ffff88800d465488, ffff88800d465530) [ 38.379308] [ 38.379525] The buggy address belongs to the physical page: [ 38.380195] page:000000007e4ed22f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd465 [ 38.381291] memcg:ffff888019b12901 [ 38.381725] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.382378] page_type: 0xffffffff() [ 38.382848] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.383795] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019b12901 [ 38.384719] page dumped because: kasan: bad access detected [ 38.385371] [ 38.385588] Memory state around the buggy address: [ 38.386162] ffff88800d465380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.387022] ffff88800d465400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 38.387893] >ffff88800d465480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.388752] ^ [ 38.389513] ffff88800d465500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 38.390369] ffff88800d465580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.391225] ================================================================== [ 38.392394] Disabling lock debugging due to kernel taint [ 40.386827] BUG: Bad rss-counter state mm:000000003331608d type:MM_FILEPAGES val:33 [ 40.387997] BUG: Bad rss-counter state mm:000000003331608d type:MM_ANONPAGES val:22 [ 40.869341] BUG: Bad rss-counter state mm:00000000c9dfc320 type:MM_FILEPAGES val:33 [ 40.870608] BUG: Bad rss-counter state mm:00000000c9dfc320 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44318' (ECDSA) to the list of known hosts. 2023/06/20 07:56:16 fuzzer started 2023/06/20 07:56:17 dialing manager at localhost:44161 2023/06/20 07:56:17 checking machine... 2023/06/20 07:56:17 checking revisions... [ 41.529172] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:56:17 testing simple program... [ 41.584208] cgroup: Unknown subsys name 'net' [ 41.645152] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:56:09 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000003 RCX=0000000000000100 RDX=ffff8880146d8000 RSI=ffffffff811431df RDI=0000000000000006 RBP=0000000019b012e0 RSP=ffff88806ce09d60 R8 =0000000000000006 R9 =0000000000000003 R10=0000000000080000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000080000 R14=ffffffff818d9dc6 R15=ffff88801462a780 RIP=ffffffff811431df 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 00007f443df49900 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=00007f443e5010b0 CR3=00000000102a0000 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=0000000000000001 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=00007f878f85a780 CR3=0000000008dbc000 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=1b2728e847ddf09dfa4b404c92e3805b XMM02=ec2efd57dc4c00df0000000000122500 XMM03=c26ab954729c786200000000001225d0 XMM04=5567b6c158d8a87e00000000000ae988 XMM05=19e9129bd510f23500000000001351d8 XMM06=c8bb632b778a2bb50000000000134040 XMM07=e042d86d42eb936e00000000001255e8 XMM08=c26ab954729c786200000000001225d0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000