syzkaller login: [ 29.955517] BUG: Bad rss-counter state mm:000000004c98ecff type:MM_FILEPAGES val:33 [ 29.957017] BUG: Bad rss-counter state mm:000000004c98ecff type:MM_ANONPAGES val:22 [ 30.095049] ================================================================== [ 30.096116] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.097038] Read of size 8 at addr ffff88800ec07ed8 by task sshd/220 [ 30.097944] [ 30.098167] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.099073] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.100109] Call Trace: [ 30.100458] [ 30.100751] dump_stack_lvl+0x91/0xf0 [ 30.101266] print_report+0xcc/0x620 [ 30.101767] ? __virt_addr_valid+0x102/0x340 [ 30.102347] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.102990] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.103643] kasan_report+0xbe/0xf0 [ 30.104132] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.104776] vma_interval_tree_remove+0xc75/0xec0 [ 30.105416] vma_prepare+0xc54/0x11a0 [ 30.105917] __split_vma+0x5af/0x950 [ 30.106402] ? __pfx___split_vma+0x10/0x10 [ 30.106934] ? find_held_lock+0x2c/0x110 [ 30.107469] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.108035] ? lock_is_held_type+0x9f/0x120 [ 30.108572] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.109179] ? mtree_range_walk+0x632/0x900 [ 30.109736] ? mas_walk+0x5c7/0x7c0 [ 30.110206] do_vmi_munmap+0x1f1/0x2b0 [ 30.110700] mmap_region+0x1f9/0x2660 [ 30.111181] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.111706] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.112412] ? __pfx_lock_acquire+0x10/0x10 [ 30.112940] ? __pfx_mmap_region+0x10/0x10 [ 30.113470] ? security_mmap_addr+0x7d/0xa0 [ 30.114003] ? get_unmapped_area+0x1f5/0x3f0 [ 30.114576] do_mmap+0x854/0xf00 [ 30.115019] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.115532] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.116087] ksys_mmap_pgoff+0x3af/0x500 [ 30.116589] do_syscall_64+0x3f/0x90 [ 30.117063] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.117708] RIP: 0033:0x7f35954bad82 [ 30.118168] 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 [ 30.120290] RSP: 002b:00007ffe1bc23cb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.121190] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f35954bad82 [ 30.122032] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f35948f4000 [ 30.122866] RBP: 00007f35948f4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.123722] R10: 0000000000000812 R11: 0000000000000206 R12: 00005610af8cbec0 [ 30.124564] R13: 00007ffe1bc23cd0 R14: 00007ffe1bc23d00 R15: 00007ffe1bc24060 [ 30.125414] [ 30.125703] [ 30.125915] Allocated by task 213: [ 30.126337] kasan_save_stack+0x22/0x50 [ 30.126837] kasan_set_track+0x25/0x30 [ 30.127340] __kasan_slab_alloc+0x59/0x70 [ 30.127860] kmem_cache_alloc+0x16b/0x370 [ 30.128369] vm_area_dup+0x20/0x160 [ 30.128821] __split_vma+0x170/0x950 [ 30.129284] split_vma+0xc6/0x110 [ 30.129719] mprotect_fixup+0x8d2/0xb30 [ 30.130218] do_mprotect_pkey+0x87e/0xd40 [ 30.130733] __x64_sys_mprotect+0x78/0xc0 [ 30.131261] do_syscall_64+0x3f/0x90 [ 30.131735] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.132368] [ 30.132582] Freed by task 213: [ 30.132975] kasan_save_stack+0x22/0x50 [ 30.133474] kasan_set_track+0x25/0x30 [ 30.133961] kasan_save_free_info+0x2b/0x50 [ 30.134489] __kasan_slab_free+0x10a/0x190 [ 30.135015] kmem_cache_free+0x10d/0x4d0 [ 30.135536] rcu_core+0x8c8/0x2860 [ 30.135974] __do_softirq+0x1b7/0x7d4 [ 30.136442] [ 30.136657] Last potentially related work creation: [ 30.137241] kasan_save_stack+0x22/0x50 [ 30.137738] __kasan_record_aux_stack+0x8e/0xa0 [ 30.138313] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.138952] remove_vma+0x139/0x170 [ 30.139421] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.139980] do_vmi_munmap+0x1f1/0x2b0 [ 30.140465] __vm_munmap+0x138/0x3a0 [ 30.140932] __x64_sys_munmap+0x59/0x80 [ 30.141425] do_syscall_64+0x3f/0x90 [ 30.141894] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.142541] [ 30.142760] The buggy address belongs to the object at ffff88800ec07e80 [ 30.142760] which belongs to the cache vm_area_struct of size 168 [ 30.144236] The buggy address is located 88 bytes inside of [ 30.144236] freed 168-byte region [ffff88800ec07e80, ffff88800ec07f28) [ 30.145628] [ 30.145842] The buggy address belongs to the physical page: [ 30.146497] page:00000000612d460f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec07 [ 30.147580] memcg:ffff88800d81a401 [ 30.148008] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.148657] page_type: 0xffffffff() [ 30.149115] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.150038] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d81a401 [ 30.150945] page dumped because: kasan: bad access detected [ 30.151609] [ 30.151825] Memory state around the buggy address: [ 30.152411] ffff88800ec07d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.153274] ffff88800ec07e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.154124] >ffff88800ec07e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.154970] ^ [ 30.155707] ffff88800ec07f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.156559] ffff88800ec07f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.157409] ================================================================== [ 30.158382] Disabling lock debugging due to kernel taint [ 32.228972] BUG: Bad rss-counter state mm:000000007fd16c79 type:MM_FILEPAGES val:33 [ 32.229961] BUG: Bad rss-counter state mm:000000007fd16c79 type:MM_ANONPAGES val:22 [ 32.723686] BUG: Bad rss-counter state mm:000000006337f0d9 type:MM_FILEPAGES val:33 [ 32.724825] BUG: Bad rss-counter state mm:000000006337f0d9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56165' (ECDSA) to the list of known hosts. 2023/06/20 01:44:15 fuzzer started 2023/06/20 01:44:15 dialing manager at localhost:44161 2023/06/20 01:44:15 checking machine... 2023/06/20 01:44:15 checking revisions... [ 33.406767] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:44:15 testing simple program... [ 33.453941] cgroup: Unknown subsys name 'net' [ 33.519107] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:44:14 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007efc10b83a70 RCX=0000555de20f3c80 RDX=0000000000000000 RSI=0000555de20f3e30 RDI=00007efc04006588 RBP=00007efc04006570 RSP=00007efc10b83a38 R8 =0000000000000003 R9 =0000000000000003 R10=0000000000000000 R11=0000000000000000 R12=0000555de1e7aa50 R13=00007efc10b83a70 R14=0000000000000001 R15=0000555de20f3e30 RIP=00007efc119bfff3 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007efc10b84700 00000000 00000000 GS =0000 0000000000000000 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=00007f0354a1d900 CR3=00000000147b2000 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=2034313a34343a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a34343a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1a65255d87923700 RBX=00000000000000f0 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff818470dc RDI=ffff88800844f780 RBP=ffff88800d5c76a8 RSP=ffff88800d5c7660 R8 =ffff88800d5c7670 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800844f780 R13=ffff88800e3ae5f0 R14=0000000000000000 R15=00000000000928c0 RIP=ffffffff81807f24 RFL=00000202 [-------] 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 00007f8c522fc900 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=00007ffffd3ee000 CR3=0000000016f04000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000