syzkaller login: [ 31.116000] BUG: Bad rss-counter state mm:000000002c2df97e type:MM_FILEPAGES val:33 [ 31.116986] BUG: Bad rss-counter state mm:000000002c2df97e type:MM_ANONPAGES val:22 [ 31.282682] ================================================================== [ 31.283579] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.284511] Read of size 8 at addr ffff88800e305058 by task sshd/219 [ 31.285374] [ 31.285653] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.286514] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.287471] Call Trace: [ 31.287804] [ 31.288089] dump_stack_lvl+0x91/0xf0 [ 31.288578] print_report+0xcc/0x620 [ 31.289093] ? __virt_addr_valid+0x102/0x340 [ 31.289636] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.290247] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.290874] kasan_report+0xbe/0xf0 [ 31.291349] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.291968] vma_interval_tree_remove+0xc75/0xec0 [ 31.292584] vma_prepare+0xc54/0x11a0 [ 31.293078] __split_vma+0x5af/0x950 [ 31.293546] ? __pfx___split_vma+0x10/0x10 [ 31.294072] ? find_held_lock+0x2c/0x110 [ 31.294595] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.295168] ? lock_is_held_type+0x9f/0x120 [ 31.295704] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.296307] ? mtree_range_walk+0x632/0x900 [ 31.296852] ? mas_walk+0x5c7/0x7c0 [ 31.297345] do_vmi_munmap+0x1f1/0x2b0 [ 31.297834] mmap_region+0x1f9/0x2660 [ 31.298322] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.298830] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.299536] ? __pfx_lock_acquire+0x10/0x10 [ 31.300059] ? __pfx_mmap_region+0x10/0x10 [ 31.300580] ? security_mmap_addr+0x7d/0xa0 [ 31.301144] ? get_unmapped_area+0x1f5/0x3f0 [ 31.301690] do_mmap+0x854/0xf00 [ 31.302125] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.302616] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.303171] ksys_mmap_pgoff+0x3af/0x500 [ 31.303670] do_syscall_64+0x3f/0x90 [ 31.304140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.304785] RIP: 0033:0x7f2238964d82 [ 31.305250] 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 [ 31.307334] RSP: 002b:00007ffee90ed928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.308223] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2238964d82 [ 31.309069] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2237d9e000 [ 31.309907] RBP: 00007f2237d9e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.310739] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fcc56a2b20 [ 31.311580] R13: 00007ffee90ed940 R14: 00007ffee90ed970 R15: 00007ffee90edcd0 [ 31.312449] [ 31.312742] [ 31.312958] Allocated by task 212: [ 31.313399] kasan_save_stack+0x22/0x50 [ 31.313907] kasan_set_track+0x25/0x30 [ 31.314403] __kasan_slab_alloc+0x59/0x70 [ 31.314923] kmem_cache_alloc+0x16b/0x370 [ 31.315445] vm_area_dup+0x20/0x160 [ 31.315900] __split_vma+0x170/0x950 [ 31.316382] split_vma+0xc6/0x110 [ 31.316839] mprotect_fixup+0x8d2/0xb30 [ 31.317364] do_mprotect_pkey+0x87e/0xd40 [ 31.317909] __x64_sys_mprotect+0x78/0xc0 [ 31.318454] do_syscall_64+0x3f/0x90 [ 31.318946] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.319616] [ 31.319848] Freed by task 212: [ 31.320258] kasan_save_stack+0x22/0x50 [ 31.320778] kasan_set_track+0x25/0x30 [ 31.321308] kasan_save_free_info+0x2b/0x50 [ 31.321872] __kasan_slab_free+0x10a/0x190 [ 31.322436] kmem_cache_free+0x10d/0x4d0 [ 31.322959] rcu_core+0x8c8/0x2860 [ 31.323431] __do_softirq+0x1b7/0x7d4 [ 31.323938] [ 31.324162] Last potentially related work creation: [ 31.324773] kasan_save_stack+0x22/0x50 [ 31.325296] __kasan_record_aux_stack+0x8e/0xa0 [ 31.325891] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.326621] remove_vma+0x139/0x170 [ 31.327091] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.327670] do_vmi_munmap+0x1f1/0x2b0 [ 31.328281] __vm_munmap+0x138/0x3a0 [ 31.328749] __x64_sys_munmap+0x59/0x80 [ 31.329273] do_syscall_64+0x3f/0x90 [ 31.329736] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.330362] [ 31.330570] Second to last potentially related work creation: [ 31.331229] kasan_save_stack+0x22/0x50 [ 31.331715] __kasan_record_aux_stack+0x8e/0xa0 [ 31.332266] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.332897] remove_vma+0x139/0x170 [ 31.333349] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.333895] do_vmi_munmap+0x1f1/0x2b0 [ 31.334371] mmap_region+0x1f9/0x2660 [ 31.334836] do_mmap+0x854/0xf00 [ 31.335271] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.335749] ksys_mmap_pgoff+0x3af/0x500 [ 31.336235] do_syscall_64+0x3f/0x90 [ 31.336696] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.337327] [ 31.337538] The buggy address belongs to the object at ffff88800e305000 [ 31.337538] which belongs to the cache vm_area_struct of size 168 [ 31.338957] The buggy address is located 88 bytes inside of [ 31.338957] freed 168-byte region [ffff88800e305000, ffff88800e3050a8) [ 31.340318] [ 31.340526] The buggy address belongs to the physical page: [ 31.341177] page:0000000065cbec93 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe305 [ 31.342218] memcg:ffff888016662d01 [ 31.342629] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.343296] page_type: 0xffffffff() [ 31.343732] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.344614] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016662d01 [ 31.345485] page dumped because: kasan: bad access detected [ 31.346127] [ 31.346337] Memory state around the buggy address: [ 31.346893] ffff88800e304f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.347716] ffff88800e304f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.348543] >ffff88800e305000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.349369] ^ [ 31.350076] ffff88800e305080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.350914] ffff88800e305100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.351740] ================================================================== [ 31.352625] Disabling lock debugging due to kernel taint [ 33.706785] BUG: Bad rss-counter state mm:0000000095ed91de type:MM_FILEPAGES val:33 [ 33.707954] BUG: Bad rss-counter state mm:0000000095ed91de type:MM_ANONPAGES val:22 [ 34.263227] BUG: Bad rss-counter state mm:00000000e0d76b6d type:MM_FILEPAGES val:33 [ 34.264456] BUG: Bad rss-counter state mm:00000000e0d76b6d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57171' (ECDSA) to the list of known hosts. 2023/06/21 06:32:17 fuzzer started 2023/06/21 06:32:17 dialing manager at localhost:36067 2023/06/21 06:32:17 checking machine... 2023/06/21 06:32:17 checking revisions... [ 34.908006] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:32:17 testing simple program... [ 34.970085] cgroup: Unknown subsys name 'net' [ 35.007637] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:32:17 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=0000000000000008 RCX=ffffffff818ed664 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000001 RSP=ffff88800f5d7de0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff88800c666a48 R13=ffff88800c6669b0 R14=ffff88800c6669a0 R15=ffff88800c666a00 RIP=ffffffff814c0250 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 00007f213638a900 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=00007f21369420b0 CR3=00000000090a4000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=ffff888008c04400 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=00007f42a4a4d020 CR3=000000000c706000 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=a4dabe72b08534b1624b62bf948083b1 XMM02=000000000011d1a0ec2efd57dc4c00df XMM03=0000000000121940b8bbcfb7bacb54e3 XMM04=d1761c2b252b96aa00000000000ae988 XMM05=dfcdbad4f1609c370000000000132b10 XMM06=a1146b45353eb6880000000000131978 XMM07=e042d86d42eb936e0000000000121bc0 XMM08=b8bbcfb7bacb54e3000000000011d200 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000