syzkaller login: [ 38.684865] BUG: Bad rss-counter state mm:00000000311c1e72 type:MM_FILEPAGES val:33 [ 38.685863] BUG: Bad rss-counter state mm:00000000311c1e72 type:MM_ANONPAGES val:22 [ 38.866816] ================================================================== [ 38.867753] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.868687] Read of size 8 at addr ffff88800eab0310 by task sshd/222 [ 38.869455] [ 38.869672] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.870655] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.871674] Call Trace: [ 38.871993] [ 38.872302] dump_stack_lvl+0x91/0xf0 [ 38.872801] print_report+0xcc/0x620 [ 38.873295] ? __virt_addr_valid+0x102/0x340 [ 38.873847] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.874476] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.875096] kasan_report+0xbe/0xf0 [ 38.875587] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.876202] vma_interval_tree_remove+0xc75/0xec0 [ 38.876811] vma_prepare+0xc54/0x11a0 [ 38.877285] __split_vma+0x5af/0x950 [ 38.877755] ? __pfx___split_vma+0x10/0x10 [ 38.878280] ? find_held_lock+0x2c/0x110 [ 38.878799] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.879362] ? lock_is_held_type+0x9f/0x120 [ 38.879917] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.880529] ? mtree_range_walk+0x632/0x900 [ 38.881080] ? mas_walk+0x5c7/0x7c0 [ 38.881553] do_vmi_munmap+0x1f1/0x2b0 [ 38.882036] mmap_region+0x1f9/0x2660 [ 38.882517] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.883034] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.883752] ? __pfx_lock_acquire+0x10/0x10 [ 38.884300] ? __pfx_mmap_region+0x10/0x10 [ 38.884824] ? security_mmap_addr+0x7d/0xa0 [ 38.885351] ? get_unmapped_area+0x1f5/0x3f0 [ 38.885893] do_mmap+0x854/0xf00 [ 38.886333] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.886830] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.887391] ksys_mmap_pgoff+0x3af/0x500 [ 38.887921] do_syscall_64+0x3f/0x90 [ 38.888425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.889076] RIP: 0033:0x7f40e5292d82 [ 38.889529] 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 [ 38.891668] RSP: 002b:00007fff7d72e558 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.892577] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f40e5292d82 [ 38.893429] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f40e46cc000 [ 38.894367] RBP: 00007f40e46cc000 R08: 0000000000000009 R09: 0000000000001000 [ 38.895267] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563bac7a4ec0 [ 38.896179] R13: 00007fff7d72e570 R14: 00007fff7d72e5a0 R15: 00007fff7d72e900 [ 38.897089] [ 38.897397] [ 38.897624] Allocated by task 215: [ 38.898076] kasan_save_stack+0x22/0x50 [ 38.898610] kasan_set_track+0x25/0x30 [ 38.899129] __kasan_slab_alloc+0x59/0x70 [ 38.899690] kmem_cache_alloc+0x16b/0x370 [ 38.900236] vm_area_dup+0x20/0x160 [ 38.900708] __split_vma+0x170/0x950 [ 38.901196] split_vma+0xc6/0x110 [ 38.901654] mprotect_fixup+0x8d2/0xb30 [ 38.902174] do_mprotect_pkey+0x87e/0xd40 [ 38.902714] __x64_sys_mprotect+0x78/0xc0 [ 38.903266] do_syscall_64+0x3f/0x90 [ 38.903767] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.904450] [ 38.904678] Freed by task 205: [ 38.905097] kasan_save_stack+0x22/0x50 [ 38.905621] kasan_set_track+0x25/0x30 [ 38.906138] kasan_save_free_info+0x2b/0x50 [ 38.906706] __kasan_slab_free+0x10a/0x190 [ 38.907262] kmem_cache_free+0x10d/0x4d0 [ 38.907808] rcu_core+0x8c8/0x2860 [ 38.908285] __do_softirq+0x1b7/0x7d4 [ 38.908789] [ 38.909013] Last potentially related work creation: [ 38.909635] kasan_save_stack+0x22/0x50 [ 38.910165] __kasan_record_aux_stack+0x8e/0xa0 [ 38.910777] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.911452] remove_vma+0x139/0x170 [ 38.911938] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.912531] do_vmi_munmap+0x1f1/0x2b0 [ 38.913045] __vm_munmap+0x138/0x3a0 [ 38.913545] __x64_sys_munmap+0x59/0x80 [ 38.914062] do_syscall_64+0x3f/0x90 [ 38.914561] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.915233] [ 38.915454] Second to last potentially related work creation: [ 38.916478] kasan_save_stack+0x22/0x50 [ 38.917133] __kasan_record_aux_stack+0x8e/0xa0 [ 38.917878] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.918716] remove_vma+0x139/0x170 [ 38.919306] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.920039] do_vmi_munmap+0x1f1/0x2b0 [ 38.920666] mmap_region+0x1f9/0x2660 [ 38.921273] do_mmap+0x854/0xf00 [ 38.921823] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.922419] ksys_mmap_pgoff+0x3af/0x500 [ 38.923019] do_syscall_64+0x3f/0x90 [ 38.923623] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.924393] [ 38.924631] The buggy address belongs to the object at ffff88800eab02b8 [ 38.924631] which belongs to the cache vm_area_struct of size 168 [ 38.926123] The buggy address is located 88 bytes inside of [ 38.926123] freed 168-byte region [ffff88800eab02b8, ffff88800eab0360) [ 38.927567] [ 38.927788] The buggy address belongs to the physical page: [ 38.928446] page:0000000041e38d07 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeab0 [ 38.929532] memcg:ffff88800e0eb601 [ 38.929962] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.930615] page_type: 0xffffffff() [ 38.931063] raw: 0100000000000200 ffff8880087a0c80 ffffea0000387cc0 dead000000000002 [ 38.932002] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0eb601 [ 38.932926] page dumped because: kasan: bad access detected [ 38.933590] [ 38.933811] Memory state around the buggy address: [ 38.934394] ffff88800eab0200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.935251] ffff88800eab0280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.936130] >ffff88800eab0300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.936994] ^ [ 38.937460] ffff88800eab0380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.938316] ffff88800eab0400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.939167] ================================================================== [ 38.940382] Disabling lock debugging due to kernel taint [ 40.968664] BUG: Bad rss-counter state mm:000000006983c1a7 type:MM_FILEPAGES val:33 [ 40.969655] BUG: Bad rss-counter state mm:000000006983c1a7 type:MM_ANONPAGES val:22 [ 41.434215] BUG: Bad rss-counter state mm:0000000070ecbed9 type:MM_FILEPAGES val:33 [ 41.435896] BUG: Bad rss-counter state mm:0000000070ecbed9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5346' (ECDSA) to the list of known hosts. 2023/06/20 14:07:39 fuzzer started 2023/06/20 14:07:40 dialing manager at localhost:36067 2023/06/20 14:07:40 checking machine... 2023/06/20 14:07:40 checking revisions... [ 42.178000] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:07:40 testing simple program... [ 42.220889] cgroup: Unknown subsys name 'net' [ 42.262093] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:07:39 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880102efa40 RCX=0000000000000001 RDX=1ffff1100d9c1355 RSI=ffff8880102efa18 RDI=ffff88806ce09aa8 RBP=ffff8880102e8000 RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000154e9 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff8880102efa18 R15=ffff88806ce09a98 RIP=ffffffff81131ca6 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 00007f28d4d15900 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=00007ffc3d057000 CR3=0000000019312000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffea00005d8dc0 RBX=ffff8880195ee7e8 RCX=ffffffff81651a42 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffea00005d8dc0 RBP=ffffea00005d8dc0 RSP=ffff88800fb671b0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000009293 R12=0000000000000514 R13=0000000000000514 R14=dffffc0000000000 R15=ffffea00005d8de0 RIP=ffffffff8180f032 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 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=00007facdc12c780 CR3=000000000ca08000 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=2039333a37303a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a37303a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000