syzkaller login: [ 68.941298] BUG: Bad rss-counter state mm:000000008eb81b7b type:MM_FILEPAGES val:33 [ 68.943272] BUG: Bad rss-counter state mm:000000008eb81b7b type:MM_ANONPAGES val:22 [ 69.110531] ================================================================== [ 69.111471] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 69.112408] Read of size 8 at addr ffff888019e59228 by task sshd/227 [ 69.113424] [ 69.113644] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 69.114519] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 69.115539] Call Trace: [ 69.115862] [ 69.116153] dump_stack_lvl+0x91/0xf0 [ 69.116650] print_report+0xcc/0x620 [ 69.117135] ? __virt_addr_valid+0x102/0x340 [ 69.117696] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.118325] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.118947] kasan_report+0xbe/0xf0 [ 69.119440] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.120070] vma_interval_tree_remove+0xc75/0xec0 [ 69.120680] vma_prepare+0xc54/0x11a0 [ 69.121164] __split_vma+0x5af/0x950 [ 69.121641] ? __pfx___split_vma+0x10/0x10 [ 69.122170] ? find_held_lock+0x2c/0x110 [ 69.122691] do_vmi_align_munmap+0x2ba/0x11f0 [ 69.123259] ? lock_is_held_type+0x9f/0x120 [ 69.123816] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 69.124421] ? mtree_range_walk+0x632/0x900 [ 69.124973] ? mas_walk+0x5c7/0x7c0 [ 69.125458] do_vmi_munmap+0x1f1/0x2b0 [ 69.125951] mmap_region+0x1f9/0x2660 [ 69.126438] ? vm_mmap_pgoff+0x15c/0x3a0 [ 69.126954] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 69.127688] ? __pfx_lock_acquire+0x10/0x10 [ 69.128232] ? __pfx_mmap_region+0x10/0x10 [ 69.128764] ? security_mmap_addr+0x7d/0xa0 [ 69.129297] ? get_unmapped_area+0x1f5/0x3f0 [ 69.129861] do_mmap+0x854/0xf00 [ 69.130306] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.130805] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 69.131402] ksys_mmap_pgoff+0x3af/0x500 [ 69.131918] do_syscall_64+0x3f/0x90 [ 69.132404] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.133049] RIP: 0033:0x7f18e87b6d82 [ 69.133512] 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 [ 69.135661] RSP: 002b:00007fff48b0a0f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 69.136572] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f18e87b6d82 [ 69.137428] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f18e7bf0000 [ 69.138281] RBP: 00007f18e7bf0000 R08: 0000000000000009 R09: 0000000000001000 [ 69.139132] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c6dcf1eec0 [ 69.140054] R13: 00007fff48b0a110 R14: 00007fff48b0a140 R15: 00007fff48b0a4a0 [ 69.140933] [ 69.141276] [ 69.141516] Allocated by task 220: [ 69.141967] kasan_save_stack+0x22/0x50 [ 69.142480] kasan_set_track+0x25/0x30 [ 69.142979] __kasan_slab_alloc+0x59/0x70 [ 69.143533] kmem_cache_alloc+0x16b/0x370 [ 69.144058] vm_area_dup+0x20/0x160 [ 69.144515] __split_vma+0x170/0x950 [ 69.145008] split_vma+0xc6/0x110 [ 69.145465] mprotect_fixup+0x8d2/0xb30 [ 69.145973] do_mprotect_pkey+0x87e/0xd40 [ 69.146501] __x64_sys_mprotect+0x78/0xc0 [ 69.147043] do_syscall_64+0x3f/0x90 [ 69.147534] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.148177] [ 69.148394] Freed by task 220: [ 69.148781] kasan_save_stack+0x22/0x50 [ 69.149295] kasan_set_track+0x25/0x30 [ 69.149790] kasan_save_free_info+0x2b/0x50 [ 69.150324] __kasan_slab_free+0x10a/0x190 [ 69.150860] kmem_cache_free+0x10d/0x4d0 [ 69.151374] rcu_core+0x8c8/0x2860 [ 69.151842] __do_softirq+0x1b7/0x7d4 [ 69.152330] [ 69.152552] Last potentially related work creation: [ 69.153139] kasan_save_stack+0x22/0x50 [ 69.153645] __kasan_record_aux_stack+0x8e/0xa0 [ 69.154224] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.154981] remove_vma+0x139/0x170 [ 69.155447] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.156015] do_vmi_munmap+0x1f1/0x2b0 [ 69.156511] __vm_munmap+0x138/0x3a0 [ 69.156983] __x64_sys_munmap+0x59/0x80 [ 69.157489] do_syscall_64+0x3f/0x90 [ 69.157973] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.158619] [ 69.158836] The buggy address belongs to the object at ffff888019e591d0 [ 69.158836] which belongs to the cache vm_area_struct of size 168 [ 69.160337] The buggy address is located 88 bytes inside of [ 69.160337] freed 168-byte region [ffff888019e591d0, ffff888019e59278) [ 69.161757] [ 69.161975] The buggy address belongs to the physical page: [ 69.162633] page:00000000fd94e959 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e59 [ 69.163748] memcg:ffff88800d9a7201 [ 69.164187] flags: 0x100000000000200(slab|node=0|zone=1) [ 69.164832] page_type: 0xffffffff() [ 69.165284] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 69.166211] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d9a7201 [ 69.167121] page dumped because: kasan: bad access detected [ 69.167795] [ 69.168016] Memory state around the buggy address: [ 69.168604] ffff888019e59100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 69.169465] ffff888019e59180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 69.170335] >ffff888019e59200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 69.171185] ^ [ 69.171762] ffff888019e59280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 69.172622] ffff888019e59300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 69.173483] ================================================================== [ 69.174464] Disabling lock debugging due to kernel taint [ 71.730547] BUG: Bad rss-counter state mm:0000000077402ff1 type:MM_FILEPAGES val:31 [ 71.731704] BUG: Bad rss-counter state mm:0000000077402ff1 type:MM_ANONPAGES val:22 [ 72.157388] BUG: Bad rss-counter state mm:000000008eaf5df7 type:MM_FILEPAGES val:33 [ 72.158513] BUG: Bad rss-counter state mm:000000008eaf5df7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48280' (ECDSA) to the list of known hosts. 2023/06/19 19:07:03 fuzzer started 2023/06/19 19:07:04 dialing manager at localhost:44161 2023/06/19 19:07:04 checking machine... 2023/06/19 19:07:04 checking revisions... [ 72.908468] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:07:04 testing simple program... [ 72.952470] cgroup: Unknown subsys name 'net' [ 72.987617] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:07:03 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=00007ffdc040f2d8 CR3=000000001a074000 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=2033303a37303a3931203931206e754a XMM01=657463656e6e6f63736944203a5d3733 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3733325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a37303a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=ffffffff85dfca1c RCX=ffffffff8180c521 RDX=0000000000000000 RSI=ffffffff86137508 RDI=ffffffff85dfc9fc RBP=ffffffff85dfc9fc RSP=ffff888019fcf590 R8 =ffffffff86137508 R9 =ffff888019fcf688 R10=0000000000038001 R11=0000000000020d8a R12=ffffffff85dfca3c R13=ffffffff85dfc9fc R14=ffffffff85dfc9fc R15=dffffc0000000000 RIP=ffffffff8112fc8c 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 00007fd4e06ad900 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=00007fd4e0c650b0 CR3=000000000e41c000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000