syzkaller login: [ 35.958569] BUG: Bad rss-counter state mm:00000000de2c56d6 type:MM_FILEPAGES val:33 [ 35.960481] BUG: Bad rss-counter state mm:00000000de2c56d6 type:MM_ANONPAGES val:22 [ 36.119255] ================================================================== [ 36.120439] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.121677] Read of size 8 at addr ffff88800fb7b798 by task sshd/221 [ 36.122598] [ 36.122856] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.123929] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.125121] Call Trace: [ 36.125501] [ 36.125840] dump_stack_lvl+0x91/0xf0 [ 36.126427] print_report+0xcc/0x620 [ 36.127005] ? __virt_addr_valid+0x102/0x340 [ 36.127694] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.128440] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.129200] kasan_report+0xbe/0xf0 [ 36.129761] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.130516] vma_interval_tree_remove+0xc75/0xec0 [ 36.131248] vma_prepare+0xc54/0x11a0 [ 36.131849] __split_vma+0x5af/0x950 [ 36.132416] ? __pfx___split_vma+0x10/0x10 [ 36.133053] ? find_held_lock+0x2c/0x110 [ 36.133681] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.134372] ? lock_is_held_type+0x9f/0x120 [ 36.135026] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.135772] ? mtree_range_walk+0x632/0x900 [ 36.136434] ? mas_walk+0x5c7/0x7c0 [ 36.136997] do_vmi_munmap+0x1f1/0x2b0 [ 36.137594] mmap_region+0x1f9/0x2660 [ 36.138182] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.138798] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.139690] ? __pfx_lock_acquire+0x10/0x10 [ 36.140335] ? __pfx_mmap_region+0x10/0x10 [ 36.140968] ? security_mmap_addr+0x7d/0xa0 [ 36.141611] ? get_unmapped_area+0x1f5/0x3f0 [ 36.142279] do_mmap+0x854/0xf00 [ 36.142800] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.143403] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.144085] ksys_mmap_pgoff+0x3af/0x500 [ 36.144692] do_syscall_64+0x3f/0x90 [ 36.145262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.146040] RIP: 0033:0x7ffb3c8a6d82 [ 36.146595] 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 [ 36.149211] RSP: 002b:00007fffb3a56a98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.150317] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffb3c8a6d82 [ 36.151376] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffb3bce0000 [ 36.152184] RBP: 00007ffb3bce0000 R08: 0000000000000009 R09: 0000000000001000 [ 36.152983] R10: 0000000000000812 R11: 0000000000000206 R12: 000055972d717f70 [ 36.153793] R13: 00007fffb3a56ab0 R14: 00007fffb3a56ae0 R15: 00007fffb3a56e40 [ 36.154605] [ 36.154884] [ 36.155091] Allocated by task 214: [ 36.155509] kasan_save_stack+0x22/0x50 [ 36.155990] kasan_set_track+0x25/0x30 [ 36.156456] __kasan_slab_alloc+0x59/0x70 [ 36.156950] kmem_cache_alloc+0x16b/0x370 [ 36.157435] vm_area_dup+0x20/0x160 [ 36.157867] __split_vma+0x170/0x950 [ 36.158308] split_vma+0xc6/0x110 [ 36.158722] mprotect_fixup+0x8d2/0xb30 [ 36.159199] do_mprotect_pkey+0x87e/0xd40 [ 36.159696] __x64_sys_mprotect+0x78/0xc0 [ 36.160281] do_syscall_64+0x3f/0x90 [ 36.160833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.161586] [ 36.161837] Freed by task 204: [ 36.162298] kasan_save_stack+0x22/0x50 [ 36.162888] kasan_set_track+0x25/0x30 [ 36.163485] kasan_save_free_info+0x2b/0x50 [ 36.164112] __kasan_slab_free+0x10a/0x190 [ 36.164739] kmem_cache_free+0x10d/0x4d0 [ 36.165332] rcu_core+0x8c8/0x2860 [ 36.165853] __do_softirq+0x1b7/0x7d4 [ 36.166414] [ 36.166664] Last potentially related work creation: [ 36.167368] kasan_save_stack+0x22/0x50 [ 36.167959] __kasan_record_aux_stack+0x8e/0xa0 [ 36.168633] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.169389] remove_vma+0x139/0x170 [ 36.169920] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.170571] do_vmi_munmap+0x1f1/0x2b0 [ 36.171140] __vm_munmap+0x138/0x3a0 [ 36.171697] __x64_sys_munmap+0x59/0x80 [ 36.172281] do_syscall_64+0x3f/0x90 [ 36.172839] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.173593] [ 36.173844] The buggy address belongs to the object at ffff88800fb7b740 [ 36.173844] which belongs to the cache vm_area_struct of size 168 [ 36.175596] The buggy address is located 88 bytes inside of [ 36.175596] freed 168-byte region [ffff88800fb7b740, ffff88800fb7b7e8) [ 36.177263] [ 36.177515] The buggy address belongs to the physical page: [ 36.178296] page:0000000087e2af2f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfb7b [ 36.179589] memcg:ffff888015c15b01 [ 36.180094] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.180857] page_type: 0xffffffff() [ 36.181387] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.182474] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015c15b01 [ 36.183563] page dumped because: kasan: bad access detected [ 36.184348] [ 36.184599] Memory state around the buggy address: [ 36.185284] ffff88800fb7b680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.186297] ffff88800fb7b700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 36.187326] >ffff88800fb7b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 36.188331] ^ [ 36.188917] ffff88800fb7b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 36.189926] ffff88800fb7b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 36.190935] ================================================================== [ 36.192095] Disabling lock debugging due to kernel taint [ 38.169870] BUG: Bad rss-counter state mm:000000004c36362b type:MM_FILEPAGES val:33 [ 38.171035] BUG: Bad rss-counter state mm:000000004c36362b type:MM_ANONPAGES val:22 [ 38.565844] BUG: Bad rss-counter state mm:0000000047b679f1 type:MM_FILEPAGES val:33 [ 38.566862] BUG: Bad rss-counter state mm:0000000047b679f1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56312' (ECDSA) to the list of known hosts. 2023/06/19 18:28:29 fuzzer started 2023/06/19 18:28:29 dialing manager at localhost:44161 2023/06/19 18:28:29 checking machine... 2023/06/19 18:28:29 checking revisions... [ 39.293442] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:28:29 testing simple program... [ 39.350237] cgroup: Unknown subsys name 'net' [ 39.400411] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:28:23 Registers: info registers vcpu 0 RAX=ffffffff8180c585 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801462fa01 RSI=ffff88801462fa40 RDI=ffff88801462fa40 RBP=ffff88801462f750 RSP=ffff88801462f688 R8 =ffffffff8613751e R9 =ffff88801462f738 R10=0000000000038001 R11=0000000000020d8a R12=ffff88801462f758 R13=ffff88801462f740 R14=ffff88801462fa48 R15=ffff88801462f6f8 RIP=ffffffff81131041 RFL=00000202 [-------] 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 00007f4c390c8900 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=00007fe3f8c64650 CR3=000000000dd0a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=cca2e786757be95a00000000000ae988 XMM05=3b2ab1eca54b02ee00000000001360c0 XMM06=c291bd5c70af25b90000000000134eb0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000031 RCX=0000000000000000 RDX=ffff88800efed1c0 RSI=ffffffff81f589c3 RDI=ffff888014527bdc RBP=ffff8880090d6000 RSP=ffff888014527a88 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000008000 R11=0000000000000000 R12=ffff888008e1c0d8 R13=0000000000000000 R14=ffff888014527bd8 R15=dffffc0000000000 RIP=ffffffff814c07e0 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 00007fe3f86af900 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=00007fe3f8c670b0 CR3=000000001d1d6000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000