syzkaller login: [ 212.005823] BUG: Bad rss-counter state mm:00000000fb4df439 type:MM_FILEPAGES val:33 [ 212.007464] BUG: Bad rss-counter state mm:00000000fb4df439 type:MM_ANONPAGES val:22 [ 212.181401] ================================================================== [ 212.182628] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 212.184007] Read of size 8 at addr ffff888017c2c4e0 by task sshd/220 [ 212.185078] [ 212.185384] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 212.186551] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 212.187671] Call Trace: [ 212.188038] [ 212.188383] dump_stack_lvl+0x91/0xf0 [ 212.188974] print_report+0xcc/0x620 [ 212.189545] ? __virt_addr_valid+0x102/0x340 [ 212.190200] ? vma_interval_tree_remove+0xc75/0xec0 [ 212.190918] ? vma_interval_tree_remove+0xc75/0xec0 [ 212.191643] kasan_report+0xbe/0xf0 [ 212.192207] ? vma_interval_tree_remove+0xc75/0xec0 [ 212.192966] vma_interval_tree_remove+0xc75/0xec0 [ 212.193691] vma_prepare+0xc54/0x11a0 [ 212.194280] __split_vma+0x5af/0x950 [ 212.194854] ? __pfx___split_vma+0x10/0x10 [ 212.195515] ? find_held_lock+0x2c/0x110 [ 212.196167] do_vmi_align_munmap+0x2ba/0x11f0 [ 212.196879] ? lock_is_held_type+0x9f/0x120 [ 212.197549] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 212.198296] ? mtree_range_walk+0x632/0x900 [ 212.198968] ? mas_walk+0x5c7/0x7c0 [ 212.199520] do_vmi_munmap+0x1f1/0x2b0 [ 212.200020] mmap_region+0x1f9/0x2660 [ 212.200513] ? vm_mmap_pgoff+0x15c/0x3a0 [ 212.201043] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 212.201762] ? __pfx_lock_acquire+0x10/0x10 [ 212.202305] ? __pfx_mmap_region+0x10/0x10 [ 212.202842] ? security_mmap_addr+0x7d/0xa0 [ 212.203380] ? get_unmapped_area+0x1f5/0x3f0 [ 212.203948] do_mmap+0x854/0xf00 [ 212.204411] vm_mmap_pgoff+0x1a6/0x3a0 [ 212.204911] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 212.205474] ksys_mmap_pgoff+0x3af/0x500 [ 212.205998] do_syscall_64+0x3f/0x90 [ 212.206476] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 212.207139] RIP: 0033:0x7fcc70f0bd82 [ 212.207597] 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 [ 212.209780] RSP: 002b:00007fffbd4f76f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 212.210710] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcc70f0bd82 [ 212.211566] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcc70345000 [ 212.212458] RBP: 00007fcc70345000 R08: 0000000000000009 R09: 0000000000001000 [ 212.213312] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558b9b698ec0 [ 212.214164] R13: 00007fffbd4f7710 R14: 00007fffbd4f7740 R15: 00007fffbd4f7aa0 [ 212.215033] [ 212.215329] [ 212.215554] Allocated by task 213: [ 212.215989] kasan_save_stack+0x22/0x50 [ 212.216522] kasan_set_track+0x25/0x30 [ 212.217016] __kasan_slab_alloc+0x59/0x70 [ 212.217543] kmem_cache_alloc+0x16b/0x370 [ 212.218070] vm_area_dup+0x20/0x160 [ 212.218527] __split_vma+0x170/0x950 [ 212.218993] split_vma+0xc6/0x110 [ 212.219432] mprotect_fixup+0x8d2/0xb30 [ 212.219954] do_mprotect_pkey+0x87e/0xd40 [ 212.220483] __x64_sys_mprotect+0x78/0xc0 [ 212.221001] do_syscall_64+0x3f/0x90 [ 212.221478] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 212.222114] [ 212.222334] Freed by task 203: [ 212.222724] kasan_save_stack+0x22/0x50 [ 212.223244] kasan_set_track+0x25/0x30 [ 212.223739] kasan_save_free_info+0x2b/0x50 [ 212.224264] __kasan_slab_free+0x10a/0x190 [ 212.224824] kmem_cache_free+0x10d/0x4d0 [ 212.225352] rcu_core+0x8c8/0x2860 [ 212.225795] __do_softirq+0x1b7/0x7d4 [ 212.226276] [ 212.226489] Last potentially related work creation: [ 212.227078] kasan_save_stack+0x22/0x50 [ 212.227583] __kasan_record_aux_stack+0x8e/0xa0 [ 212.228152] __call_rcu_common.constprop.0+0x6a/0xb90 [ 212.228819] remove_vma+0x139/0x170 [ 212.229276] do_vmi_align_munmap+0xd4a/0x11f0 [ 212.229832] do_vmi_munmap+0x1f1/0x2b0 [ 212.230317] __vm_munmap+0x138/0x3a0 [ 212.230797] __x64_sys_munmap+0x59/0x80 [ 212.231296] do_syscall_64+0x3f/0x90 [ 212.231771] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 212.232445] [ 212.232664] The buggy address belongs to the object at ffff888017c2c488 [ 212.232664] which belongs to the cache vm_area_struct of size 168 [ 212.234115] The buggy address is located 88 bytes inside of [ 212.234115] freed 168-byte region [ffff888017c2c488, ffff888017c2c530) [ 212.235517] [ 212.235736] The buggy address belongs to the physical page: [ 212.236421] page:000000007027a543 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17c2c [ 212.237506] memcg:ffff88800e7f4301 [ 212.237935] flags: 0x100000000000200(slab|node=0|zone=1) [ 212.238577] page_type: 0xffffffff() [ 212.239049] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 212.239967] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7f4301 [ 212.240896] page dumped because: kasan: bad access detected [ 212.241554] [ 212.241776] Memory state around the buggy address: [ 212.242361] ffff888017c2c380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 212.243227] ffff888017c2c400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 212.244090] >ffff888017c2c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 212.244975] ^ [ 212.245725] ffff888017c2c500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 212.246585] ffff888017c2c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 212.247427] ================================================================== [ 212.248438] Disabling lock debugging due to kernel taint [ 214.648534] BUG: Bad rss-counter state mm:000000005c3ce707 type:MM_FILEPAGES val:33 [ 214.649718] BUG: Bad rss-counter state mm:000000005c3ce707 type:MM_ANONPAGES val:22 [ 215.171120] BUG: Bad rss-counter state mm:000000003e972048 type:MM_FILEPAGES val:33 [ 215.172265] BUG: Bad rss-counter state mm:000000003e972048 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36341' (ECDSA) to the list of known hosts. 2023/06/19 16:16:49 fuzzer started 2023/06/19 16:16:49 dialing manager at localhost:44161 2023/06/19 16:16:49 checking machine... 2023/06/19 16:16:49 checking revisions... [ 215.792569] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:16:49 testing simple program... [ 215.830275] cgroup: Unknown subsys name 'net' [ 215.871337] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:13:48 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff861375e0 RDX=1ffff11001b47ec1 RSI=1ffff11001b47ec0 RDI=1ffff11001b47ec0 RBP=ffff88800da3f600 RSP=ffff88800da3f538 R8 =ffffffff861375e4 R9 =ffff88800da3f5e8 R10=0000000000038001 R11=0000000000020dae R12=ffff88800da3f608 R13=ffff88800da3f5f0 R14=ffff88800da3f940 R15=ffff88800da3f5a8 RIP=ffffffff811310ce 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 00007efd1a76b900 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=00007fff56423000 CR3=000000000cb74000 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=00007f2d99966000 CR3=000000000ca50000 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=00000000000000000000000000000000 XMM01=82b361ad102a0faa6e4a05675b854c08 XMM02=000000000015b408eff9b2d0a8fce9cb XMM03=000000000015b4d82c67c8bc2e329bc3 XMM04=44959575d9a9230d00000000000ae988 XMM05=19e9129bd510f235000000000017aac0 XMM06=cb24662f6c3209fe0000000000179928 XMM07=e042d86d42eb936e0000000000162d28 XMM08=c2254dfda2a1f7ad000000000015b4d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000