syzkaller login: [ 31.942197] BUG: Bad rss-counter state mm:00000000a6372b5b type:MM_FILEPAGES val:33 [ 31.943084] BUG: Bad rss-counter state mm:00000000a6372b5b type:MM_ANONPAGES val:22 [ 32.118617] ================================================================== [ 32.119731] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.120875] Read of size 8 at addr ffff888016cccb38 by task sshd/220 [ 32.121979] [ 32.122267] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.123498] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.124998] Call Trace: [ 32.125486] [ 32.125901] dump_stack_lvl+0x91/0xf0 [ 32.126638] print_report+0xcc/0x620 [ 32.127309] ? __virt_addr_valid+0x102/0x340 [ 32.128080] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.128893] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.129711] kasan_report+0xbe/0xf0 [ 32.130340] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.131182] vma_interval_tree_remove+0xc75/0xec0 [ 32.132007] vma_prepare+0xc54/0x11a0 [ 32.132652] __split_vma+0x5af/0x950 [ 32.133285] ? __pfx___split_vma+0x10/0x10 [ 32.133999] ? find_held_lock+0x2c/0x110 [ 32.134707] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.135491] ? lock_is_held_type+0x9f/0x120 [ 32.136230] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.137036] ? mtree_range_walk+0x632/0x900 [ 32.137766] ? mas_walk+0x5c7/0x7c0 [ 32.138404] do_vmi_munmap+0x1f1/0x2b0 [ 32.139067] mmap_region+0x1f9/0x2660 [ 32.139710] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.140306] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.141032] ? __pfx_lock_acquire+0x10/0x10 [ 32.141581] ? __pfx_mmap_region+0x10/0x10 [ 32.142119] ? security_mmap_addr+0x7d/0xa0 [ 32.142672] ? get_unmapped_area+0x1f5/0x3f0 [ 32.143237] do_mmap+0x854/0xf00 [ 32.143705] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.144217] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.144796] ksys_mmap_pgoff+0x3af/0x500 [ 32.145314] do_syscall_64+0x3f/0x90 [ 32.145805] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.146459] RIP: 0033:0x7fa8fa609d82 [ 32.146928] 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 [ 32.149112] RSP: 002b:00007ffe92a31fa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.150056] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa8fa609d82 [ 32.150947] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa8f9a43000 [ 32.151842] RBP: 00007fa8f9a43000 R08: 0000000000000009 R09: 0000000000001000 [ 32.152725] R10: 0000000000000812 R11: 0000000000000206 R12: 00005601463beec0 [ 32.153599] R13: 00007ffe92a31fc0 R14: 00007ffe92a31ff0 R15: 00007ffe92a32350 [ 32.154492] [ 32.154817] [ 32.155047] Allocated by task 213: [ 32.155511] kasan_save_stack+0x22/0x50 [ 32.156038] kasan_set_track+0x25/0x30 [ 32.156580] __kasan_slab_alloc+0x59/0x70 [ 32.157137] kmem_cache_alloc+0x16b/0x370 [ 32.157691] vm_area_dup+0x20/0x160 [ 32.158167] __split_vma+0x170/0x950 [ 32.158654] split_vma+0xc6/0x110 [ 32.159116] mprotect_fixup+0x8d2/0xb30 [ 32.159664] do_mprotect_pkey+0x87e/0xd40 [ 32.160209] __x64_sys_mprotect+0x78/0xc0 [ 32.160755] do_syscall_64+0x3f/0x90 [ 32.161254] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.161928] [ 32.162268] Freed by task 213: [ 32.162681] kasan_save_stack+0x22/0x50 [ 32.163202] kasan_set_track+0x25/0x30 [ 32.163745] kasan_save_free_info+0x2b/0x50 [ 32.164304] __kasan_slab_free+0x10a/0x190 [ 32.164868] kmem_cache_free+0x10d/0x4d0 [ 32.165409] rcu_core+0x8c8/0x2860 [ 32.165874] __do_softirq+0x1b7/0x7d4 [ 32.166373] [ 32.166602] Last potentially related work creation: [ 32.167215] kasan_save_stack+0x22/0x50 [ 32.167758] __kasan_record_aux_stack+0x8e/0xa0 [ 32.168355] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.169023] remove_vma+0x139/0x170 [ 32.169494] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.170072] do_vmi_munmap+0x1f1/0x2b0 [ 32.170579] __vm_munmap+0x138/0x3a0 [ 32.171069] __x64_sys_munmap+0x59/0x80 [ 32.171592] do_syscall_64+0x3f/0x90 [ 32.172086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.172766] [ 32.172994] The buggy address belongs to the object at ffff888016cccae0 [ 32.172994] which belongs to the cache vm_area_struct of size 168 [ 32.174522] The buggy address is located 88 bytes inside of [ 32.174522] freed 168-byte region [ffff888016cccae0, ffff888016cccb88) [ 32.176015] [ 32.176242] The buggy address belongs to the physical page: [ 32.176927] page:00000000ffeb1466 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ccc [ 32.178093] memcg:ffff88801a182e01 [ 32.178532] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.179202] page_type: 0xffffffff() [ 32.179684] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.180666] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a182e01 [ 32.181639] page dumped because: kasan: bad access detected [ 32.182349] [ 32.182575] Memory state around the buggy address: [ 32.183210] ffff888016ccca00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.184123] ffff888016ccca80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 32.185083] >ffff888016cccb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.186254] ^ [ 32.187076] ffff888016cccb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.188246] ffff888016cccc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.189258] ================================================================== [ 32.190401] Disabling lock debugging due to kernel taint [ 34.275076] BUG: Bad rss-counter state mm:000000002253d396 type:MM_FILEPAGES val:33 [ 34.276250] BUG: Bad rss-counter state mm:000000002253d396 type:MM_ANONPAGES val:22 [ 34.732709] BUG: Bad rss-counter state mm:0000000067107b5a type:MM_FILEPAGES val:33 [ 34.733650] BUG: Bad rss-counter state mm:0000000067107b5a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41461' (ECDSA) to the list of known hosts. 2023/06/19 10:55:16 fuzzer started 2023/06/19 10:55:17 dialing manager at localhost:44161 2023/06/19 10:55:17 checking machine... 2023/06/19 10:55:17 checking revisions... [ 35.426168] kmemleak: Automatic memory scanning thread ended 2023/06/19 10:55:17 testing simple program... [ 35.476098] cgroup: Unknown subsys name 'net' [ 35.513842] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:55:15 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=00007f9330254a00 CR3=000000001006e000 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=2036313a35353a3031203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a35353a3031203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000004 RBX=00007f4a152af6f8 RCX=00007f4a157a2000 RDX=0000000000000000 RSI=00007ffd357c0000 RDI=0000000000000008 RBP=00007ffd357c24d0 RSP=00007ffd357c23d0 R8 =0000000000000024 R9 =00007ffd357bdc78 R10=0000000000000040 R11=0000000000000246 R12=0000000000000004 R13=0000000000000008 R14=0000000000000000 R15=0000000000000000 RIP=00007f4a15dece3f RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4a152af900 00000000 00000000 GS =0000 0000000000000000 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=00007ffd357be000 CR3=000000000ef00000 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