syzkaller login: [ 31.061396] BUG: Bad rss-counter state mm:00000000ea72aa0e type:MM_FILEPAGES val:33 [ 31.063376] BUG: Bad rss-counter state mm:00000000ea72aa0e type:MM_ANONPAGES val:22 [ 31.214737] ================================================================== [ 31.215656] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.216621] Read of size 8 at addr ffff88800eb94140 by task sshd/220 [ 31.217414] [ 31.217638] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.218652] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.219649] Call Trace: [ 31.219983] [ 31.220278] dump_stack_lvl+0x91/0xf0 [ 31.220767] print_report+0xcc/0x620 [ 31.221280] ? __virt_addr_valid+0x102/0x340 [ 31.221850] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.222482] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.223112] kasan_report+0xbe/0xf0 [ 31.223593] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.224227] vma_interval_tree_remove+0xc75/0xec0 [ 31.224835] vma_prepare+0xc54/0x11a0 [ 31.225322] __split_vma+0x5af/0x950 [ 31.225796] ? __pfx___split_vma+0x10/0x10 [ 31.226336] ? find_held_lock+0x2c/0x110 [ 31.226867] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.227432] ? lock_is_held_type+0x9f/0x120 [ 31.227969] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.228579] ? mtree_range_walk+0x632/0x900 [ 31.229145] ? mas_walk+0x5c7/0x7c0 [ 31.229629] do_vmi_munmap+0x1f1/0x2b0 [ 31.230125] mmap_region+0x1f9/0x2660 [ 31.230617] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.231134] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.231850] ? __pfx_lock_acquire+0x10/0x10 [ 31.232389] ? __pfx_mmap_region+0x10/0x10 [ 31.232925] ? security_mmap_addr+0x7d/0xa0 [ 31.233489] ? get_unmapped_area+0x1f5/0x3f0 [ 31.234045] do_mmap+0x854/0xf00 [ 31.234486] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.234985] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.235564] ksys_mmap_pgoff+0x3af/0x500 [ 31.236078] do_syscall_64+0x3f/0x90 [ 31.236585] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.237257] RIP: 0033:0x7fcaa06ead82 [ 31.237729] 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 [ 31.239851] RSP: 002b:00007ffc51615138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.240764] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcaa06ead82 [ 31.241649] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fca9fb24000 [ 31.242512] RBP: 00007fca9fb24000 R08: 0000000000000009 R09: 0000000000001000 [ 31.243379] R10: 0000000000000812 R11: 0000000000000206 R12: 000056499fef6ec0 [ 31.244250] R13: 00007ffc51615150 R14: 00007ffc51615180 R15: 00007ffc516154e0 [ 31.245120] [ 31.245415] [ 31.245638] Allocated by task 213: [ 31.246065] kasan_save_stack+0x22/0x50 [ 31.246579] kasan_set_track+0x25/0x30 [ 31.247073] __kasan_slab_alloc+0x59/0x70 [ 31.247603] kmem_cache_alloc+0x16b/0x370 [ 31.248140] vm_area_dup+0x20/0x160 [ 31.248602] __split_vma+0x170/0x950 [ 31.249076] split_vma+0xc6/0x110 [ 31.249522] mprotect_fixup+0x8d2/0xb30 [ 31.250023] do_mprotect_pkey+0x87e/0xd40 [ 31.250558] __x64_sys_mprotect+0x78/0xc0 [ 31.251085] do_syscall_64+0x3f/0x90 [ 31.251568] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.252229] [ 31.252450] Freed by task 213: [ 31.252843] kasan_save_stack+0x22/0x50 [ 31.253370] kasan_set_track+0x25/0x30 [ 31.253864] kasan_save_free_info+0x2b/0x50 [ 31.254396] __kasan_slab_free+0x10a/0x190 [ 31.254940] kmem_cache_free+0x10d/0x4d0 [ 31.255451] rcu_core+0x8c8/0x2860 [ 31.255904] __do_softirq+0x1b7/0x7d4 [ 31.256393] [ 31.256613] Last potentially related work creation: [ 31.257208] kasan_save_stack+0x22/0x50 [ 31.257720] __kasan_record_aux_stack+0x8e/0xa0 [ 31.258305] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.258958] remove_vma+0x139/0x170 [ 31.259410] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.259977] do_vmi_munmap+0x1f1/0x2b0 [ 31.260468] __vm_munmap+0x138/0x3a0 [ 31.260934] __x64_sys_munmap+0x59/0x80 [ 31.261445] do_syscall_64+0x3f/0x90 [ 31.261929] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.262582] [ 31.262803] Second to last potentially related work creation: [ 31.263489] kasan_save_stack+0x22/0x50 [ 31.263999] __kasan_record_aux_stack+0x8e/0xa0 [ 31.264581] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.265251] remove_vma+0x139/0x170 [ 31.265708] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.266276] do_vmi_munmap+0x1f1/0x2b0 [ 31.266766] mmap_region+0x1f9/0x2660 [ 31.267252] do_mmap+0x854/0xf00 [ 31.267692] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.268191] ksys_mmap_pgoff+0x7d/0x500 [ 31.268683] do_syscall_64+0x3f/0x90 [ 31.269187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.269841] [ 31.270058] The buggy address belongs to the object at ffff88800eb940e8 [ 31.270058] which belongs to the cache vm_area_struct of size 168 [ 31.271533] The buggy address is located 88 bytes inside of [ 31.271533] freed 168-byte region [ffff88800eb940e8, ffff88800eb94190) [ 31.272942] [ 31.273177] The buggy address belongs to the physical page: [ 31.273840] page:00000000aae4f697 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb94 [ 31.274920] memcg:ffff88800e7c9001 [ 31.275351] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.276003] page_type: 0xffffffff() [ 31.276468] raw: 0100000000000200 ffff88800879fc80 ffffea00003a1540 dead000000000004 [ 31.277401] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7c9001 [ 31.278304] page dumped because: kasan: bad access detected [ 31.278963] [ 31.279182] Memory state around the buggy address: [ 31.279769] ffff88800eb94000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.280624] ffff88800eb94080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.281492] >ffff88800eb94100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.282349] ^ [ 31.282985] ffff88800eb94180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 31.283838] ffff88800eb94200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.284692] ================================================================== [ 31.285743] Disabling lock debugging due to kernel taint [ 33.237571] BUG: Bad rss-counter state mm:00000000e55f9d81 type:MM_FILEPAGES val:33 [ 33.238502] BUG: Bad rss-counter state mm:00000000e55f9d81 type:MM_ANONPAGES val:22 [ 33.799796] BUG: Bad rss-counter state mm:0000000054b53493 type:MM_FILEPAGES val:33 [ 33.800959] BUG: Bad rss-counter state mm:0000000054b53493 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3897' (ECDSA) to the list of known hosts. 2023/06/19 14:11:05 fuzzer started 2023/06/19 14:11:05 dialing manager at localhost:44161 2023/06/19 14:11:05 checking machine... 2023/06/19 14:11:05 checking revisions... [ 34.458247] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:11:05 testing simple program... [ 34.518249] cgroup: Unknown subsys name 'net' [ 34.566428] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:11:03 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff8613753e RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86137542 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130ad6 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 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=00007f604cb397f0 CR3=000000000cb76000 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=1255c66c8cf94c857c4394d32fe63771 XMM02=ec2efd57dc4c00df000000000011cf50 XMM03=130101c4ffd96685000000000011d020 XMM04=8b84d74ed33f66bd00000000000ae988 XMM05=4635c37156f4953a0000000000136608 XMM06=c291bd5c70af25b900000000001356a8 XMM07=e042d86d42eb936e00000000001243f0 XMM08=130101c4ffd96685000000000011d020 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888009558000 RCX=00000000800d000c RDX=00000000000d000d RSI=ffff888009558000 RDI=ffff88800844f780 RBP=ffff88800fc47a28 RSP=ffff88800fc47990 R8 =00000000800d000c R9 =0000000000000000 R10=ffffea0000255600 R11=00000000000d000a R12=ffffea0000255600 R13=0000000000000000 R14=00000000000d000c R15=ffff88800844f780 RIP=ffffffff818095bf RFL=00000242 [---Z---] 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 00007f8eeecda900 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=00007ffc5ec76000 CR3=000000000e60a000 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