syzkaller login: [ 33.078067] BUG: Bad rss-counter state mm:00000000564f1af9 type:MM_FILEPAGES val:33 [ 33.079777] BUG: Bad rss-counter state mm:00000000564f1af9 type:MM_ANONPAGES val:22 [ 33.247711] ================================================================== [ 33.248618] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.249561] Read of size 8 at addr ffff88800e001310 by task sshd/219 [ 33.250347] [ 33.250723] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.251587] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.252572] Call Trace: [ 33.252910] [ 33.253205] dump_stack_lvl+0x91/0xf0 [ 33.253697] print_report+0xcc/0x620 [ 33.254179] ? __virt_addr_valid+0x102/0x340 [ 33.254751] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.255372] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.255986] kasan_report+0xbe/0xf0 [ 33.256476] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.257109] vma_interval_tree_remove+0xc75/0xec0 [ 33.257743] vma_prepare+0xc54/0x11a0 [ 33.258248] __split_vma+0x5af/0x950 [ 33.258761] ? __pfx___split_vma+0x10/0x10 [ 33.259310] ? find_held_lock+0x2c/0x110 [ 33.259855] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.260452] ? lock_is_held_type+0x9f/0x120 [ 33.261014] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.261649] ? mtree_range_walk+0x632/0x900 [ 33.262230] ? mas_walk+0x5c7/0x7c0 [ 33.262733] do_vmi_munmap+0x1f1/0x2b0 [ 33.263251] mmap_region+0x1f9/0x2660 [ 33.263755] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.264292] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.265030] ? __pfx_lock_acquire+0x10/0x10 [ 33.265578] ? __pfx_mmap_region+0x10/0x10 [ 33.266136] ? security_mmap_addr+0x7d/0xa0 [ 33.266709] ? get_unmapped_area+0x1f5/0x3f0 [ 33.267288] do_mmap+0x854/0xf00 [ 33.267744] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.268257] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.268836] ksys_mmap_pgoff+0x3af/0x500 [ 33.269370] do_syscall_64+0x3f/0x90 [ 33.269874] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.270567] RIP: 0033:0x7f524edd4d82 [ 33.271045] 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 [ 33.273259] RSP: 002b:00007ffc59d16a98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.274201] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f524edd4d82 [ 33.275105] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f524e20e000 [ 33.275991] RBP: 00007f524e20e000 R08: 0000000000000009 R09: 0000000000001000 [ 33.276876] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f8c671fec0 [ 33.277765] R13: 00007ffc59d16ab0 R14: 00007ffc59d16ae0 R15: 00007ffc59d16e40 [ 33.278657] [ 33.278968] [ 33.279190] Allocated by task 212: [ 33.279633] kasan_save_stack+0x22/0x50 [ 33.280166] kasan_set_track+0x25/0x30 [ 33.280677] __kasan_slab_alloc+0x59/0x70 [ 33.281233] kmem_cache_alloc+0x16b/0x370 [ 33.281764] vm_area_dup+0x20/0x160 [ 33.282374] __split_vma+0x170/0x950 [ 33.282877] split_vma+0xc6/0x110 [ 33.283353] mprotect_fixup+0x8d2/0xb30 [ 33.283875] do_mprotect_pkey+0x87e/0xd40 [ 33.284420] __x64_sys_mprotect+0x78/0xc0 [ 33.284965] do_syscall_64+0x3f/0x90 [ 33.285459] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.286130] [ 33.286356] Freed by task 209: [ 33.286770] kasan_save_stack+0x22/0x50 [ 33.287288] kasan_set_track+0x25/0x30 [ 33.287803] kasan_save_free_info+0x2b/0x50 [ 33.288362] __kasan_slab_free+0x10a/0x190 [ 33.288915] kmem_cache_free+0x10d/0x4d0 [ 33.289449] rcu_core+0x8c8/0x2860 [ 33.289917] __do_softirq+0x1b7/0x7d4 [ 33.290412] [ 33.290639] Last potentially related work creation: [ 33.291242] kasan_save_stack+0x22/0x50 [ 33.291808] __kasan_record_aux_stack+0x8e/0xa0 [ 33.292398] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.293050] remove_vma+0x139/0x170 [ 33.293512] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.294079] do_vmi_munmap+0x1f1/0x2b0 [ 33.294593] __vm_munmap+0x138/0x3a0 [ 33.295061] __x64_sys_munmap+0x59/0x80 [ 33.295568] do_syscall_64+0x3f/0x90 [ 33.296041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.296706] [ 33.296924] Second to last potentially related work creation: [ 33.297622] kasan_save_stack+0x22/0x50 [ 33.298132] __kasan_record_aux_stack+0x8e/0xa0 [ 33.298733] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.299388] remove_vma+0x139/0x170 [ 33.299844] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.300406] do_vmi_munmap+0x1f1/0x2b0 [ 33.300893] mmap_region+0x1f9/0x2660 [ 33.301382] do_mmap+0x854/0xf00 [ 33.301816] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.302307] ksys_mmap_pgoff+0x3af/0x500 [ 33.302833] do_syscall_64+0x3f/0x90 [ 33.303311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.303953] [ 33.304167] The buggy address belongs to the object at ffff88800e0012b8 [ 33.304167] which belongs to the cache vm_area_struct of size 168 [ 33.305657] The buggy address is located 88 bytes inside of [ 33.305657] freed 168-byte region [ffff88800e0012b8, ffff88800e001360) [ 33.307089] [ 33.307307] The buggy address belongs to the physical page: [ 33.307971] page:00000000d9e90314 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe001 [ 33.309063] memcg:ffff88800df98001 [ 33.309488] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.310145] page_type: 0xffffffff() [ 33.310617] raw: 0100000000000200 ffff88800879fc80 ffffea000038d840 dead000000000006 [ 33.311542] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df98001 [ 33.312458] page dumped because: kasan: bad access detected [ 33.313113] [ 33.313330] Memory state around the buggy address: [ 33.313923] ffff88800e001200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 33.314811] ffff88800e001280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.315672] >ffff88800e001300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.316540] ^ [ 33.317004] ffff88800e001380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.317850] ffff88800e001400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.318709] ================================================================== [ 33.319624] Disabling lock debugging due to kernel taint [ 35.239010] BUG: Bad rss-counter state mm:00000000645f4423 type:MM_FILEPAGES val:33 [ 35.239986] BUG: Bad rss-counter state mm:00000000645f4423 type:MM_ANONPAGES val:22 [ 35.703393] BUG: Bad rss-counter state mm:000000002132c6a4 type:MM_FILEPAGES val:33 [ 35.704535] BUG: Bad rss-counter state mm:000000002132c6a4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63078' (ECDSA) to the list of known hosts. 2023/06/19 18:24:36 fuzzer started 2023/06/19 18:24:36 dialing manager at localhost:44161 2023/06/19 18:24:36 checking machine... 2023/06/19 18:24:36 checking revisions... [ 36.404884] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:24:36 testing simple program... [ 36.455528] cgroup: Unknown subsys name 'net' [ 36.495799] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:24:34 Registers: info registers vcpu 0 RAX=ffffffff8186c18e RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888019fcfd01 RSI=ffff888019fcfdd8 RDI=ffff888019fcfdd8 RBP=ffff88806ce09af0 RSP=ffff88806ce09a20 R8 =ffffffff8614b186 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000024249 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff888019fcfde0 R15=ffff88806ce09a98 RIP=ffffffff8112fbf3 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 00007f7cda16a900 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=00007f7cda721618 CR3=000000000df76000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001885569 RBX=ffff88800c42ab18 RCX=1ffff110018851b6 RDX=dffffc0000000000 RSI=ffff88801ba345b8 RDI=ffff88800c42ab48 RBP=ffff88800c428d80 RSP=ffff888014617958 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88801ba34580 R13=0000000000000000 R14=ffff88800d74ce88 R15=ffff88800d74ce40 RIP=ffffffff818474fe RFL=00000046 [---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 00007fe24eed3700 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=00007f75d1c21f80 CR3=0000000019dea000 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=2036333a34323a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a34323a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000