syzkaller login: [ 40.314691] BUG: Bad rss-counter state mm:00000000f9f707de type:MM_FILEPAGES val:33 [ 40.315763] BUG: Bad rss-counter state mm:00000000f9f707de type:MM_ANONPAGES val:22 [ 40.497496] ================================================================== [ 40.498412] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.499370] Read of size 8 at addr ffff88800d874798 by task sshd/220 [ 40.500144] [ 40.500369] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.501356] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.502335] Call Trace: [ 40.502658] [ 40.502963] dump_stack_lvl+0x91/0xf0 [ 40.503448] print_report+0xcc/0x620 [ 40.503935] ? __virt_addr_valid+0x102/0x340 [ 40.504486] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.505125] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.505734] kasan_report+0xbe/0xf0 [ 40.506211] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.506843] vma_interval_tree_remove+0xc75/0xec0 [ 40.507446] vma_prepare+0xc54/0x11a0 [ 40.507920] __split_vma+0x5af/0x950 [ 40.508399] ? __pfx___split_vma+0x10/0x10 [ 40.508941] ? find_held_lock+0x2c/0x110 [ 40.509460] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.510029] ? lock_is_held_type+0x9f/0x120 [ 40.510575] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.511179] ? mtree_range_walk+0x632/0x900 [ 40.511723] ? mas_walk+0x5c7/0x7c0 [ 40.512194] do_vmi_munmap+0x1f1/0x2b0 [ 40.512709] mmap_region+0x1f9/0x2660 [ 40.513186] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.513697] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.514414] ? __pfx_lock_acquire+0x10/0x10 [ 40.514945] ? __pfx_mmap_region+0x10/0x10 [ 40.515480] ? security_mmap_addr+0x7d/0xa0 [ 40.516011] ? get_unmapped_area+0x1f5/0x3f0 [ 40.516574] do_mmap+0x854/0xf00 [ 40.517013] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.517508] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.518070] ksys_mmap_pgoff+0x3af/0x500 [ 40.518581] do_syscall_64+0x3f/0x90 [ 40.519055] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.519703] RIP: 0033:0x7fc91b986d82 [ 40.520156] 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 [ 40.522289] RSP: 002b:00007ffc8bc7b3a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.523201] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc91b986d82 [ 40.524044] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc91adc0000 [ 40.524907] RBP: 00007fc91adc0000 R08: 0000000000000009 R09: 0000000000001000 [ 40.525746] R10: 0000000000000812 R11: 0000000000000206 R12: 00005579b223dd90 [ 40.526585] R13: 00007ffc8bc7b3c0 R14: 00007ffc8bc7b3f0 R15: 00007ffc8bc7b750 [ 40.527443] [ 40.527736] [ 40.527954] Allocated by task 213: [ 40.528385] kasan_save_stack+0x22/0x50 [ 40.528918] kasan_set_track+0x25/0x30 [ 40.529422] __kasan_slab_alloc+0x59/0x70 [ 40.529953] kmem_cache_alloc+0x16b/0x370 [ 40.530473] vm_area_dup+0x20/0x160 [ 40.530923] __split_vma+0x170/0x950 [ 40.531388] split_vma+0xc6/0x110 [ 40.531826] mprotect_fixup+0x8d2/0xb30 [ 40.532326] do_mprotect_pkey+0x87e/0xd40 [ 40.532855] __x64_sys_mprotect+0x78/0xc0 [ 40.533375] do_syscall_64+0x3f/0x90 [ 40.533843] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.534489] [ 40.534706] Freed by task 210: [ 40.535093] kasan_save_stack+0x22/0x50 [ 40.535596] kasan_set_track+0x25/0x30 [ 40.536085] kasan_save_free_info+0x2b/0x50 [ 40.536636] __kasan_slab_free+0x10a/0x190 [ 40.537164] kmem_cache_free+0x10d/0x4d0 [ 40.537677] rcu_core+0x8c8/0x2860 [ 40.538124] __do_softirq+0x1b7/0x7d4 [ 40.538603] [ 40.538817] Last potentially related work creation: [ 40.539404] kasan_save_stack+0x22/0x50 [ 40.539911] __kasan_record_aux_stack+0x8e/0xa0 [ 40.540485] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.541131] remove_vma+0x139/0x170 [ 40.541587] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.542145] do_vmi_munmap+0x1f1/0x2b0 [ 40.542633] __vm_munmap+0x138/0x3a0 [ 40.543100] __x64_sys_munmap+0x59/0x80 [ 40.543608] do_syscall_64+0x3f/0x90 [ 40.544086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.544744] [ 40.544962] Second to last potentially related work creation: [ 40.545675] kasan_save_stack+0x22/0x50 [ 40.546177] __kasan_record_aux_stack+0x8e/0xa0 [ 40.546759] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.547411] remove_vma+0x139/0x170 [ 40.547862] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.548426] do_vmi_munmap+0x1f1/0x2b0 [ 40.548930] mmap_region+0x1f9/0x2660 [ 40.549411] do_mmap+0x854/0xf00 [ 40.549844] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.550339] ksys_mmap_pgoff+0x3af/0x500 [ 40.550846] do_syscall_64+0x3f/0x90 [ 40.551317] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.551962] [ 40.552176] The buggy address belongs to the object at ffff88800d874740 [ 40.552176] which belongs to the cache vm_area_struct of size 168 [ 40.553657] The buggy address is located 88 bytes inside of [ 40.553657] freed 168-byte region [ffff88800d874740, ffff88800d8747e8) [ 40.555067] [ 40.555288] The buggy address belongs to the physical page: [ 40.555958] page:0000000080124609 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd874 [ 40.557054] memcg:ffff88800c511701 [ 40.557501] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.558174] page_type: 0xffffffff() [ 40.558638] raw: 0100000000000200 ffff88800879fc80 ffffea00003363c0 dead000000000004 [ 40.559575] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c511701 [ 40.560509] page dumped because: kasan: bad access detected [ 40.561200] [ 40.561416] Memory state around the buggy address: [ 40.562016] ffff88800d874680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.562886] ffff88800d874700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 40.563764] >ffff88800d874780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 40.564646] ^ [ 40.565156] ffff88800d874800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 40.566026] ffff88800d874880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 40.566896] ================================================================== [ 40.567884] Disabling lock debugging due to kernel taint [ 42.547916] BUG: Bad rss-counter state mm:00000000679e1a40 type:MM_FILEPAGES val:33 [ 42.549030] BUG: Bad rss-counter state mm:00000000679e1a40 type:MM_ANONPAGES val:22 [ 43.110493] BUG: Bad rss-counter state mm:00000000f8679343 type:MM_FILEPAGES val:33 [ 43.111724] BUG: Bad rss-counter state mm:00000000f8679343 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60814' (ECDSA) to the list of known hosts. 2023/06/19 16:16:59 fuzzer started 2023/06/19 16:17:00 dialing manager at localhost:44161 2023/06/19 16:17:00 checking machine... 2023/06/19 16:17:00 checking revisions... [ 43.763922] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:17:00 testing simple program... [ 43.823014] cgroup: Unknown subsys name 'net' [ 43.866740] cgroup: Unknown subsys name 'rlimit' [ 45.653563] BUG: Bad rss-counter state mm:00000000995f6642 type:MM_FILEPAGES val:169 [ 45.654777] BUG: Bad rss-counter state mm:00000000995f6642 type:MM_ANONPAGES val:50 executing program executing program executing program VM DIAGNOSIS: 16:16:49 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f56631125f0 CR3=000000000cb34000 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=cdd1ea73ef29d1b13841da2350406f39 XMM02=0000000000120390ec2efd57dc4c00df XMM03=0000000000124a585be9b0be19423b7a XMM04=13a0936886f7baf900000000000ae988 XMM05=19e9129bd510f2350000000000135930 XMM06=47380692561d06c10000000000134798 XMM07=e042d86d42eb936e0000000000124cd8 XMM08=5be9b0be19423b7a00000000001203f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff86096756 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888009067728 RSP=ffff888009067610 R8 =ffffffff8609675a R9 =ffff888009067710 R10=0000000000038001 R11=0000000000006097 R12=ffff888009067730 R13=ffff888009067718 R14=ffff8880090676d0 R15=ffff8880090676d0 RIP=ffffffff81131162 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 00007f0b9d32c900 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=00007ffe72967000 CR3=000000000cc52000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000