syzkaller login: [ 29.954920] BUG: Bad rss-counter state mm:000000000759b8bb type:MM_FILEPAGES val:33 [ 29.956714] BUG: Bad rss-counter state mm:000000000759b8bb type:MM_ANONPAGES val:22 [ 30.139605] ================================================================== [ 30.140571] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.141549] Read of size 8 at addr ffff888015a03a50 by task sshd/222 [ 30.142339] [ 30.142659] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.143554] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.144614] Call Trace: [ 30.144961] [ 30.145254] dump_stack_lvl+0x91/0xf0 [ 30.145773] print_report+0xcc/0x620 [ 30.146272] ? __virt_addr_valid+0x102/0x340 [ 30.146843] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.147481] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.148138] kasan_report+0xbe/0xf0 [ 30.148634] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.149286] vma_interval_tree_remove+0xc75/0xec0 [ 30.149915] vma_prepare+0xc54/0x11a0 [ 30.150407] __split_vma+0x5af/0x950 [ 30.150900] ? __pfx___split_vma+0x10/0x10 [ 30.151450] ? find_held_lock+0x2c/0x110 [ 30.152008] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.152593] ? lock_is_held_type+0x9f/0x120 [ 30.153163] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.153787] ? mtree_range_walk+0x632/0x900 [ 30.154367] ? mas_walk+0x5c7/0x7c0 [ 30.154856] do_vmi_munmap+0x1f1/0x2b0 [ 30.155363] mmap_region+0x1f9/0x2660 [ 30.155858] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.156425] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.157173] ? __pfx_lock_acquire+0x10/0x10 [ 30.157725] ? __pfx_mmap_region+0x10/0x10 [ 30.158272] ? security_mmap_addr+0x7d/0xa0 [ 30.158826] ? get_unmapped_area+0x1f5/0x3f0 [ 30.159395] do_mmap+0x854/0xf00 [ 30.159850] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.160388] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.160968] ksys_mmap_pgoff+0x3af/0x500 [ 30.161493] do_syscall_64+0x3f/0x90 [ 30.161993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.162678] RIP: 0033:0x7f8ec0139d82 [ 30.163156] 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 [ 30.165327] RSP: 002b:00007ffefc642be8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.166240] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8ec0139d82 [ 30.167097] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8ebf573000 [ 30.168002] RBP: 00007f8ebf573000 R08: 0000000000000009 R09: 0000000000001000 [ 30.168886] R10: 0000000000000812 R11: 0000000000000206 R12: 000056227ab1eb20 [ 30.169778] R13: 00007ffefc642c00 R14: 00007ffefc642c30 R15: 00007ffefc642f90 [ 30.170661] [ 30.170962] [ 30.171191] Allocated by task 213: [ 30.171648] kasan_save_stack+0x22/0x50 [ 30.172197] kasan_set_track+0x25/0x30 [ 30.172710] __kasan_slab_alloc+0x59/0x70 [ 30.173265] kmem_cache_alloc+0x16b/0x370 [ 30.173806] vm_area_dup+0x20/0x160 [ 30.174285] __split_vma+0x170/0x950 [ 30.174763] split_vma+0xc6/0x110 [ 30.175196] mprotect_fixup+0x8d2/0xb30 [ 30.175722] do_mprotect_pkey+0x87e/0xd40 [ 30.176259] __x64_sys_mprotect+0x78/0xc0 [ 30.176780] do_syscall_64+0x3f/0x90 [ 30.177278] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.177944] [ 30.178162] Freed by task 110: [ 30.178551] kasan_save_stack+0x22/0x50 [ 30.179050] kasan_set_track+0x25/0x30 [ 30.179539] kasan_save_free_info+0x2b/0x50 [ 30.180087] __kasan_slab_free+0x10a/0x190 [ 30.180626] kmem_cache_free+0x10d/0x4d0 [ 30.181124] rcu_core+0x8c8/0x2860 [ 30.181566] __do_softirq+0x1b7/0x7d4 [ 30.182042] [ 30.182257] Last potentially related work creation: [ 30.182839] kasan_save_stack+0x22/0x50 [ 30.183338] __kasan_record_aux_stack+0x8e/0xa0 [ 30.183919] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.184558] remove_vma+0x139/0x170 [ 30.185008] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.185563] do_vmi_munmap+0x1f1/0x2b0 [ 30.186044] __vm_munmap+0x138/0x3a0 [ 30.186510] __x64_sys_munmap+0x59/0x80 [ 30.187004] do_syscall_64+0x3f/0x90 [ 30.187479] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.188121] [ 30.188334] The buggy address belongs to the object at ffff888015a039f8 [ 30.188334] which belongs to the cache vm_area_struct of size 168 [ 30.189803] The buggy address is located 88 bytes inside of [ 30.189803] freed 168-byte region [ffff888015a039f8, ffff888015a03aa0) [ 30.191209] [ 30.191424] The buggy address belongs to the physical page: [ 30.192108] page:000000008dd2835c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a03 [ 30.193190] memcg:ffff88800d89e001 [ 30.193612] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.194253] page_type: 0xffffffff() [ 30.194705] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.195621] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d89e001 [ 30.196523] page dumped because: kasan: bad access detected [ 30.197183] [ 30.197396] Memory state around the buggy address: [ 30.197971] ffff888015a03900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.198819] ffff888015a03980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.199670] >ffff888015a03a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.200533] ^ [ 30.201228] ffff888015a03a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.202071] ffff888015a03b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.202916] ================================================================== [ 30.203862] Disabling lock debugging due to kernel taint [ 31.732002] BUG: Bad rss-counter state mm:000000003773f58a type:MM_FILEPAGES val:33 [ 31.732739] BUG: Bad rss-counter state mm:000000003773f58a type:MM_ANONPAGES val:22 [ 32.155804] BUG: Bad rss-counter state mm:0000000067278397 type:MM_FILEPAGES val:33 [ 32.157001] BUG: Bad rss-counter state mm:0000000067278397 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35679' (ECDSA) to the list of known hosts. 2023/06/20 13:46:03 fuzzer started 2023/06/20 13:46:03 dialing manager at localhost:36067 2023/06/20 13:46:03 checking machine... 2023/06/20 13:46:03 checking revisions... [ 32.836797] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:46:04 testing simple program... [ 32.882223] cgroup: Unknown subsys name 'net' [ 32.933708] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:46:03 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000000 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff81830828 RSP=ffff88806ce09d88 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88806ce361c8 R13=ffffffff87b6a200 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff812d135c RFL=00000006 [-----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 00007f274bc6d900 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=00007f274bc26008 CR3=0000000016de4000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fe7590fe000 CR3=000000000cae6000 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=2033303a36343a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a36343a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000