syzkaller login: [ 44.947490] BUG: Bad rss-counter state mm:0000000037db879b type:MM_FILEPAGES val:33 [ 44.948728] BUG: Bad rss-counter state mm:0000000037db879b type:MM_ANONPAGES val:22 [ 45.118002] ================================================================== [ 45.119187] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.120183] Read of size 8 at addr ffff88800efe45c8 by task sshd/219 [ 45.121005] [ 45.121234] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.122163] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.123207] Call Trace: [ 45.123546] [ 45.123855] dump_stack_lvl+0x91/0xf0 [ 45.124382] print_report+0xcc/0x620 [ 45.124898] ? __virt_addr_valid+0x102/0x340 [ 45.125509] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.126186] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.126851] kasan_report+0xbe/0xf0 [ 45.127363] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.128034] vma_interval_tree_remove+0xc75/0xec0 [ 45.128688] vma_prepare+0xc54/0x11a0 [ 45.129204] __split_vma+0x5af/0x950 [ 45.129737] ? __pfx___split_vma+0x10/0x10 [ 45.130308] ? find_held_lock+0x2c/0x110 [ 45.130872] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.131485] ? lock_is_held_type+0x9f/0x120 [ 45.132070] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.132719] ? mtree_range_walk+0x632/0x900 [ 45.133316] ? mas_walk+0x5c7/0x7c0 [ 45.133833] do_vmi_munmap+0x1f1/0x2b0 [ 45.134363] mmap_region+0x1f9/0x2660 [ 45.134891] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.135451] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.136224] ? __pfx_lock_acquire+0x10/0x10 [ 45.136806] ? __pfx_mmap_region+0x10/0x10 [ 45.137384] ? security_mmap_addr+0x7d/0xa0 [ 45.137968] ? get_unmapped_area+0x1f5/0x3f0 [ 45.138567] do_mmap+0x854/0xf00 [ 45.139042] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.139602] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.140203] ksys_mmap_pgoff+0x3af/0x500 [ 45.140746] do_syscall_64+0x3f/0x90 [ 45.141259] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.141966] RIP: 0033:0x7f8e6e833d82 [ 45.142454] 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 [ 45.144731] RSP: 002b:00007fff4894df08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.145699] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8e6e833d82 [ 45.146602] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8e6dc6d000 [ 45.147503] RBP: 00007f8e6dc6d000 R08: 0000000000000009 R09: 0000000000001000 [ 45.148398] R10: 0000000000000812 R11: 0000000000000206 R12: 00005626d9ea3ec0 [ 45.149300] R13: 00007fff4894df20 R14: 00007fff4894df50 R15: 00007fff4894e2b0 [ 45.150225] [ 45.150540] [ 45.150770] Allocated by task 212: [ 45.151229] kasan_save_stack+0x22/0x50 [ 45.151766] kasan_set_track+0x25/0x30 [ 45.152290] __kasan_slab_alloc+0x59/0x70 [ 45.152850] kmem_cache_alloc+0x16b/0x370 [ 45.153400] vm_area_dup+0x20/0x160 [ 45.153901] __split_vma+0x170/0x950 [ 45.154398] split_vma+0xc6/0x110 [ 45.154866] mprotect_fixup+0x8d2/0xb30 [ 45.155403] do_mprotect_pkey+0x87e/0xd40 [ 45.155959] __x64_sys_mprotect+0x78/0xc0 [ 45.156518] do_syscall_64+0x3f/0x90 [ 45.157022] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.157712] [ 45.157942] Freed by task 212: [ 45.158360] kasan_save_stack+0x22/0x50 [ 45.158899] kasan_set_track+0x25/0x30 [ 45.159490] kasan_save_free_info+0x2b/0x50 [ 45.160057] __kasan_slab_free+0x10a/0x190 [ 45.160626] kmem_cache_free+0x10d/0x4d0 [ 45.161166] rcu_core+0x8c8/0x2860 [ 45.161659] __do_softirq+0x1b7/0x7d4 [ 45.162171] [ 45.162401] Last potentially related work creation: [ 45.163025] kasan_save_stack+0x22/0x50 [ 45.163566] __kasan_record_aux_stack+0x8e/0xa0 [ 45.164178] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.164868] remove_vma+0x139/0x170 [ 45.165352] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.165956] do_vmi_munmap+0x1f1/0x2b0 [ 45.166476] __vm_munmap+0x138/0x3a0 [ 45.166977] __x64_sys_munmap+0x59/0x80 [ 45.167509] do_syscall_64+0x3f/0x90 [ 45.168015] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.168699] [ 45.168929] Second to last potentially related work creation: [ 45.169666] kasan_save_stack+0x22/0x50 [ 45.170208] __kasan_record_aux_stack+0x8e/0xa0 [ 45.170820] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.171507] remove_vma+0x139/0x170 [ 45.171990] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.172592] do_vmi_munmap+0x1f1/0x2b0 [ 45.173115] mmap_region+0x1f9/0x2660 [ 45.173643] do_mmap+0x854/0xf00 [ 45.174103] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.174624] ksys_mmap_pgoff+0x7d/0x500 [ 45.175151] do_syscall_64+0x3f/0x90 [ 45.175659] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.176341] [ 45.176575] The buggy address belongs to the object at ffff88800efe4570 [ 45.176575] which belongs to the cache vm_area_struct of size 168 [ 45.178154] The buggy address is located 88 bytes inside of [ 45.178154] freed 168-byte region [ffff88800efe4570, ffff88800efe4618) [ 45.179646] [ 45.179878] The buggy address belongs to the physical page: [ 45.180589] page:0000000073d599f1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefe4 [ 45.181768] memcg:ffff888013405d01 [ 45.182223] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.182914] page_type: 0xffffffff() [ 45.183395] raw: 0100000000000200 ffff88800879fc80 ffffea0000253000 dead000000000004 [ 45.184375] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013405d01 [ 45.185342] page dumped because: kasan: bad access detected [ 45.186055] [ 45.186285] Memory state around the buggy address: [ 45.186905] ffff88800efe4480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.187819] ffff88800efe4500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 45.188736] >ffff88800efe4580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.189662] ^ [ 45.190372] ffff88800efe4600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 45.191288] ffff88800efe4680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.192197] ================================================================== [ 45.193487] Disabling lock debugging due to kernel taint [ 47.072944] BUG: Bad rss-counter state mm:00000000ee421f96 type:MM_FILEPAGES val:33 [ 47.074686] BUG: Bad rss-counter state mm:00000000ee421f96 type:MM_ANONPAGES val:22 [ 47.533470] BUG: Bad rss-counter state mm:0000000086a6d784 type:MM_FILEPAGES val:33 [ 47.535034] BUG: Bad rss-counter state mm:0000000086a6d784 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15865' (ECDSA) to the list of known hosts. 2023/06/19 21:57:57 fuzzer started 2023/06/19 21:57:57 dialing manager at localhost:44161 2023/06/19 21:57:57 checking machine... 2023/06/19 21:57:57 checking revisions... [ 48.330083] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:57:58 testing simple program... [ 48.371742] cgroup: Unknown subsys name 'net' [ 48.442076] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:57:43 Registers: info registers vcpu 0 RAX=1ffffffff0bf4733 RBX=ffffffff85fa3998 RCX=ffffffff8363dca6 RDX=0000000000000000 RSI=ffffffff863b1c4e RDI=ffffffff85fa3980 RBP=ffffffff85fa3994 RSP=ffff888016aef810 R8 =ffffffff863b1c4e R9 =ffff888016aef908 R10=0000000000038001 R11=000000000008a96b R12=ffffffff85fa39a0 R13=ffffffff85fa3980 R14=ffffffff85fa3990 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007fbb7b50e900 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=00007fff814eb000 CR3=000000000c4a4000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007f42c3020190 CR3=0000000009a52000 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=2037353a37353a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a37353a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000