syzkaller login: [ 35.955589] BUG: Bad rss-counter state mm:0000000081173443 type:MM_FILEPAGES val:33 [ 35.956973] BUG: Bad rss-counter state mm:0000000081173443 type:MM_ANONPAGES val:22 [ 36.124331] ================================================================== [ 36.125265] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.126211] Read of size 8 at addr ffff88800eb36058 by task sshd/219 [ 36.126988] [ 36.127396] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.128279] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.129299] Call Trace: [ 36.129651] [ 36.129945] dump_stack_lvl+0x91/0xf0 [ 36.130435] print_report+0xcc/0x620 [ 36.130924] ? __virt_addr_valid+0x102/0x340 [ 36.131488] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.132109] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.132735] kasan_report+0xbe/0xf0 [ 36.133231] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.133859] vma_interval_tree_remove+0xc75/0xec0 [ 36.134473] vma_prepare+0xc54/0x11a0 [ 36.134955] __split_vma+0x5af/0x950 [ 36.135429] ? __pfx___split_vma+0x10/0x10 [ 36.135985] ? find_held_lock+0x2c/0x110 [ 36.136515] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.137100] ? lock_is_held_type+0x9f/0x120 [ 36.137641] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.138258] ? mtree_range_walk+0x632/0x900 [ 36.138820] ? mas_walk+0x5c7/0x7c0 [ 36.139301] do_vmi_munmap+0x1f1/0x2b0 [ 36.139801] mmap_region+0x1f9/0x2660 [ 36.140295] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.140807] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.141546] ? __pfx_lock_acquire+0x10/0x10 [ 36.142089] ? __pfx_mmap_region+0x10/0x10 [ 36.142629] ? security_mmap_addr+0x7d/0xa0 [ 36.143172] ? get_unmapped_area+0x1f5/0x3f0 [ 36.143732] do_mmap+0x854/0xf00 [ 36.144178] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.144674] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.145257] ksys_mmap_pgoff+0x3af/0x500 [ 36.145769] do_syscall_64+0x3f/0x90 [ 36.146262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.146920] RIP: 0033:0x7f06bafcbd82 [ 36.147393] 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 [ 36.149548] RSP: 002b:00007ffdc66ce968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.150474] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f06bafcbd82 [ 36.151335] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f06ba405000 [ 36.152205] RBP: 00007f06ba405000 R08: 0000000000000009 R09: 0000000000001000 [ 36.153067] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563663d7ef70 [ 36.153944] R13: 00007ffdc66ce980 R14: 00007ffdc66ce9b0 R15: 00007ffdc66ced10 [ 36.154811] [ 36.155106] [ 36.155326] Allocated by task 212: [ 36.155763] kasan_save_stack+0x22/0x50 [ 36.156284] kasan_set_track+0x25/0x30 [ 36.156779] __kasan_slab_alloc+0x59/0x70 [ 36.157342] kmem_cache_alloc+0x16b/0x370 [ 36.157867] vm_area_dup+0x20/0x160 [ 36.158344] __split_vma+0x170/0x950 [ 36.158822] split_vma+0xc6/0x110 [ 36.159273] mprotect_fixup+0x8d2/0xb30 [ 36.159786] do_mprotect_pkey+0x87e/0xd40 [ 36.160313] __x64_sys_mprotect+0x78/0xc0 [ 36.160841] do_syscall_64+0x3f/0x90 [ 36.161329] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.161969] [ 36.162189] Freed by task 209: [ 36.162584] kasan_save_stack+0x22/0x50 [ 36.163097] kasan_set_track+0x25/0x30 [ 36.163600] kasan_save_free_info+0x2b/0x50 [ 36.164133] __kasan_slab_free+0x10a/0x190 [ 36.164670] kmem_cache_free+0x10d/0x4d0 [ 36.165206] rcu_core+0x8c8/0x2860 [ 36.165653] __do_softirq+0x1b7/0x7d4 [ 36.166133] [ 36.166356] Last potentially related work creation: [ 36.166943] kasan_save_stack+0x22/0x50 [ 36.167455] __kasan_record_aux_stack+0x8e/0xa0 [ 36.168032] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.168678] remove_vma+0x139/0x170 [ 36.169267] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.169826] do_vmi_munmap+0x1f1/0x2b0 [ 36.170317] __vm_munmap+0x138/0x3a0 [ 36.170786] __x64_sys_munmap+0x59/0x80 [ 36.171287] do_syscall_64+0x3f/0x90 [ 36.171765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.172406] [ 36.172623] Second to last potentially related work creation: [ 36.173336] kasan_save_stack+0x22/0x50 [ 36.173839] __kasan_record_aux_stack+0x8e/0xa0 [ 36.174414] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.175059] remove_vma+0x139/0x170 [ 36.175515] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.176074] do_vmi_munmap+0x1f1/0x2b0 [ 36.176567] mmap_region+0x1f9/0x2660 [ 36.177062] do_mmap+0x854/0xf00 [ 36.177505] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.177994] ksys_mmap_pgoff+0x7d/0x500 [ 36.178487] do_syscall_64+0x3f/0x90 [ 36.178962] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.179609] [ 36.179823] The buggy address belongs to the object at ffff88800eb36000 [ 36.179823] which belongs to the cache vm_area_struct of size 168 [ 36.181300] The buggy address is located 88 bytes inside of [ 36.181300] freed 168-byte region [ffff88800eb36000, ffff88800eb360a8) [ 36.182708] [ 36.182931] The buggy address belongs to the physical page: [ 36.183595] page:0000000068b25b9a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb36 [ 36.184677] memcg:ffff88800e7ff401 [ 36.185141] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.185788] page_type: 0xffffffff() [ 36.186251] raw: 0100000000000200 ffff88800879fc80 ffffea00003a6940 dead000000000004 [ 36.187177] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7ff401 [ 36.188085] page dumped because: kasan: bad access detected [ 36.188752] [ 36.188980] Memory state around the buggy address: [ 36.189582] ffff88800eb35f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 36.190445] ffff88800eb35f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.191307] >ffff88800eb36000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.192157] ^ [ 36.192877] ffff88800eb36080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 36.193751] ffff88800eb36100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.194602] ================================================================== [ 36.195515] Disabling lock debugging due to kernel taint [ 38.369202] BUG: Bad rss-counter state mm:00000000f3dac4fe type:MM_FILEPAGES val:33 [ 38.370195] BUG: Bad rss-counter state mm:00000000f3dac4fe type:MM_ANONPAGES val:22 [ 38.894574] BUG: Bad rss-counter state mm:00000000966298f0 type:MM_FILEPAGES val:33 [ 38.895740] BUG: Bad rss-counter state mm:00000000966298f0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41001' (ECDSA) to the list of known hosts. 2023/06/19 15:17:40 fuzzer started 2023/06/19 15:17:40 dialing manager at localhost:44161 2023/06/19 15:17:40 checking machine... 2023/06/19 15:17:40 checking revisions... [ 39.548483] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:17:40 testing simple program... [ 39.591152] cgroup: Unknown subsys name 'net' [ 39.632073] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:17:35 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88801ca0fd90 RCX=ffffffff821584df RDX=ffff888016c91b40 RSI=0000000000000000 RDI=0000000000000005 RBP=00000000000000f4 RSP=ffff88801ca0fcc8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00007ffde9c714c0 R13=0000000000000001 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c01e1 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 00007ff701cfb900 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=00007ffde9c72000 CR3=000000001bc7c000 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=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 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=00007fcff64d55e0 CR3=000000000deba000 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=2030343a37313a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a37313a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000