syzkaller login: [ 39.454511] BUG: Bad rss-counter state mm:00000000ef98b254 type:MM_FILEPAGES val:33 [ 39.457036] BUG: Bad rss-counter state mm:00000000ef98b254 type:MM_ANONPAGES val:22 [ 39.622885] ================================================================== [ 39.623843] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.624824] Read of size 8 at addr ffff88800f2ad5c8 by task sshd/219 [ 39.625703] [ 39.625931] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.626844] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.627908] Call Trace: [ 39.628243] [ 39.628545] dump_stack_lvl+0x91/0xf0 [ 39.629049] print_report+0xcc/0x620 [ 39.629554] ? __virt_addr_valid+0x102/0x340 [ 39.630133] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.630801] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.631429] kasan_report+0xbe/0xf0 [ 39.631921] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.632562] vma_interval_tree_remove+0xc75/0xec0 [ 39.633197] vma_prepare+0xc54/0x11a0 [ 39.633700] __split_vma+0x5af/0x950 [ 39.634208] ? __pfx___split_vma+0x10/0x10 [ 39.634757] ? find_held_lock+0x2c/0x110 [ 39.635300] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.635878] ? lock_is_held_type+0x9f/0x120 [ 39.636429] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.637047] ? mtree_range_walk+0x632/0x900 [ 39.637593] ? mas_walk+0x5c7/0x7c0 [ 39.638065] do_vmi_munmap+0x1f1/0x2b0 [ 39.638571] mmap_region+0x1f9/0x2660 [ 39.639062] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.639578] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.640292] ? __pfx_lock_acquire+0x10/0x10 [ 39.640821] ? __pfx_mmap_region+0x10/0x10 [ 39.641347] ? security_mmap_addr+0x7d/0xa0 [ 39.641882] ? get_unmapped_area+0x1f5/0x3f0 [ 39.642452] do_mmap+0x854/0xf00 [ 39.642893] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.643393] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.643953] ksys_mmap_pgoff+0x3af/0x500 [ 39.644458] do_syscall_64+0x3f/0x90 [ 39.644935] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.645578] RIP: 0033:0x7f3cd068cd82 [ 39.646029] 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 [ 39.648183] RSP: 002b:00007ffc0684fb18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.649090] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3cd068cd82 [ 39.649930] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3ccfac6000 [ 39.650799] RBP: 00007f3ccfac6000 R08: 0000000000000009 R09: 0000000000001000 [ 39.651652] R10: 0000000000000812 R11: 0000000000000206 R12: 00005591906c3ec0 [ 39.652499] R13: 00007ffc0684fb30 R14: 00007ffc0684fb60 R15: 00007ffc0684fec0 [ 39.653350] [ 39.653642] [ 39.653863] Allocated by task 212: [ 39.654302] kasan_save_stack+0x22/0x50 [ 39.654808] kasan_set_track+0x25/0x30 [ 39.655302] __kasan_slab_alloc+0x59/0x70 [ 39.655837] kmem_cache_alloc+0x16b/0x370 [ 39.656353] vm_area_dup+0x20/0x160 [ 39.656808] __split_vma+0x170/0x950 [ 39.657279] split_vma+0xc6/0x110 [ 39.657722] mprotect_fixup+0x8d2/0xb30 [ 39.658245] do_mprotect_pkey+0x87e/0xd40 [ 39.658780] __x64_sys_mprotect+0x78/0xc0 [ 39.659300] do_syscall_64+0x3f/0x90 [ 39.659772] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.660432] [ 39.660646] Freed by task 212: [ 39.661038] kasan_save_stack+0x22/0x50 [ 39.661544] kasan_set_track+0x25/0x30 [ 39.662037] kasan_save_free_info+0x2b/0x50 [ 39.662577] __kasan_slab_free+0x10a/0x190 [ 39.663106] kmem_cache_free+0x10d/0x4d0 [ 39.663614] rcu_core+0x8c8/0x2860 [ 39.664055] __do_softirq+0x1b7/0x7d4 [ 39.664541] [ 39.664759] Last potentially related work creation: [ 39.665336] kasan_save_stack+0x22/0x50 [ 39.665842] __kasan_record_aux_stack+0x8e/0xa0 [ 39.666438] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.667097] remove_vma+0x139/0x170 [ 39.667570] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.668125] do_vmi_munmap+0x1f1/0x2b0 [ 39.668614] __vm_munmap+0x138/0x3a0 [ 39.669083] __x64_sys_munmap+0x59/0x80 [ 39.669584] do_syscall_64+0x3f/0x90 [ 39.670058] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.670712] [ 39.670930] Second to last potentially related work creation: [ 39.671611] kasan_save_stack+0x22/0x50 [ 39.672116] __kasan_record_aux_stack+0x8e/0xa0 [ 39.672695] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.673355] remove_vma+0x139/0x170 [ 39.673826] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.674415] do_vmi_munmap+0x1f1/0x2b0 [ 39.674909] mmap_region+0x1f9/0x2660 [ 39.675410] do_mmap+0x854/0xf00 [ 39.675847] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.676341] ksys_mmap_pgoff+0x3af/0x500 [ 39.676852] do_syscall_64+0x3f/0x90 [ 39.677341] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.678011] [ 39.678241] The buggy address belongs to the object at ffff88800f2ad570 [ 39.678241] which belongs to the cache vm_area_struct of size 168 [ 39.679736] The buggy address is located 88 bytes inside of [ 39.679736] freed 168-byte region [ffff88800f2ad570, ffff88800f2ad618) [ 39.681152] [ 39.681375] The buggy address belongs to the physical page: [ 39.682070] page:000000003ad7892e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf2ad [ 39.683189] memcg:ffff88800f0f9301 [ 39.683627] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.684288] page_type: 0xffffffff() [ 39.684751] raw: 0100000000000200 ffff88800879fc80 ffffea0000381c80 dead000000000004 [ 39.685672] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f0f9301 [ 39.686602] page dumped because: kasan: bad access detected [ 39.687267] [ 39.687487] Memory state around the buggy address: [ 39.688074] ffff88800f2ad480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.688932] ffff88800f2ad500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 39.689791] >ffff88800f2ad580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.690656] ^ [ 39.691324] ffff88800f2ad600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 39.692182] ffff88800f2ad680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.693041] ================================================================== [ 39.694118] Disabling lock debugging due to kernel taint [ 41.630395] BUG: Bad rss-counter state mm:000000002c7aa9e3 type:MM_FILEPAGES val:33 [ 41.631443] BUG: Bad rss-counter state mm:000000002c7aa9e3 type:MM_ANONPAGES val:22 [ 42.079730] BUG: Bad rss-counter state mm:000000009feaeca4 type:MM_FILEPAGES val:33 [ 42.080945] BUG: Bad rss-counter state mm:000000009feaeca4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19404' (ECDSA) to the list of known hosts. 2023/06/20 01:11:36 fuzzer started 2023/06/20 01:11:37 dialing manager at localhost:44161 2023/06/20 01:11:37 checking machine... 2023/06/20 01:11:37 checking revisions... [ 42.770534] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:11:37 testing simple program... [ 42.820313] cgroup: Unknown subsys name 'net' [ 42.874449] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:11:36 Registers: info registers vcpu 0 RAX=000000000000005a RBX=ffff888018017e00 RCX=0000000000000000 RDX=ffff8880183e3680 RSI=ffffffff81af9772 RDI=ffff888018017dc8 RBP=ffff888018017e20 RSP=ffff888018017be8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=ffff8880196cd2d0 R14=ffff888018017db0 R15=ffff888018017e00 RIP=ffffffff81af9dbf RFL=00000293 [--S-A-C] 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 00007f48fdfa8700 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=00007ffec656e000 CR3=000000000ecd8000 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=2036333a31313a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a31313a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86137007 RBX=0000000000000002 RCX=ffffffff86137004 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff86137006 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000020cb4 R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff88806cf09e48 R15=ffff88806cf09a78 RIP=ffffffff811311ed 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 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=00007f5274f171b0 CR3=000000000d714000 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=9f9bde031a1f778e984827c4618eced0 XMM02=000000000011e558ec2efd57dc4c00df XMM03=000000000012476032d002ff1b04fad9 XMM04=18805b6f9b586df500000000000ae988 XMM05=dfcdbad4f1609c370000000000135380 XMM06=335276e8e4d0d4180000000000134558 XMM07=e042d86d42eb936e0000000000124a38 XMM08=32d002ff1b04fad9000000000011e5b8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000