syzkaller login: [ 30.921718] BUG: Bad rss-counter state mm:00000000745ffee7 type:MM_FILEPAGES val:33 [ 30.922808] BUG: Bad rss-counter state mm:00000000745ffee7 type:MM_ANONPAGES val:22 [ 31.090039] ================================================================== [ 31.090997] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.091981] Read of size 8 at addr ffff88800ef7f798 by task sshd/220 [ 31.092931] [ 31.093155] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.094147] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.095200] Call Trace: [ 31.095527] [ 31.095819] dump_stack_lvl+0x91/0xf0 [ 31.096322] print_report+0xcc/0x620 [ 31.096826] ? __virt_addr_valid+0x102/0x340 [ 31.097386] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.098048] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.098701] kasan_report+0xbe/0xf0 [ 31.099196] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.099840] vma_interval_tree_remove+0xc75/0xec0 [ 31.100450] vma_prepare+0xc54/0x11a0 [ 31.100934] __split_vma+0x5af/0x950 [ 31.101412] ? __pfx___split_vma+0x10/0x10 [ 31.101941] ? find_held_lock+0x2c/0x110 [ 31.102510] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.103079] ? lock_is_held_type+0x9f/0x120 [ 31.103651] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.104287] ? mtree_range_walk+0x632/0x900 [ 31.104851] ? mas_walk+0x5c7/0x7c0 [ 31.105357] do_vmi_munmap+0x1f1/0x2b0 [ 31.106038] mmap_region+0x1f9/0x2660 [ 31.106698] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.107399] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.108361] ? __pfx_lock_acquire+0x10/0x10 [ 31.109086] ? __pfx_mmap_region+0x10/0x10 [ 31.109803] ? security_mmap_addr+0x7d/0xa0 [ 31.110546] ? get_unmapped_area+0x1f5/0x3f0 [ 31.111290] do_mmap+0x854/0xf00 [ 31.111887] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.112565] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.113334] ksys_mmap_pgoff+0x3af/0x500 [ 31.114057] do_syscall_64+0x3f/0x90 [ 31.114715] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.115572] RIP: 0033:0x7f5d11119d82 [ 31.116194] 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 [ 31.118931] RSP: 002b:00007ffebe0e1738 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.120068] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5d11119d82 [ 31.121221] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5d10553000 [ 31.122386] RBP: 00007f5d10553000 R08: 0000000000000009 R09: 0000000000001000 [ 31.123544] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560607e60d90 [ 31.124684] R13: 00007ffebe0e1750 R14: 00007ffebe0e1780 R15: 00007ffebe0e1ae0 [ 31.125800] [ 31.126194] [ 31.126475] Allocated by task 213: [ 31.127038] kasan_save_stack+0x22/0x50 [ 31.127680] kasan_set_track+0x25/0x30 [ 31.128300] __kasan_slab_alloc+0x59/0x70 [ 31.128993] kmem_cache_alloc+0x16b/0x370 [ 31.129610] vm_area_dup+0x20/0x160 [ 31.130087] __split_vma+0x170/0x950 [ 31.130588] split_vma+0xc6/0x110 [ 31.131043] mprotect_fixup+0x8d2/0xb30 [ 31.131633] do_mprotect_pkey+0x87e/0xd40 [ 31.132305] __x64_sys_mprotect+0x78/0xc0 [ 31.132986] do_syscall_64+0x3f/0x90 [ 31.133687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.134433] [ 31.134654] Freed by task 213: [ 31.135049] kasan_save_stack+0x22/0x50 [ 31.135555] kasan_set_track+0x25/0x30 [ 31.136059] kasan_save_free_info+0x2b/0x50 [ 31.136604] __kasan_slab_free+0x10a/0x190 [ 31.137136] kmem_cache_free+0x10d/0x4d0 [ 31.137652] rcu_core+0x8c8/0x2860 [ 31.138124] __do_softirq+0x1b7/0x7d4 [ 31.138607] [ 31.138829] Last potentially related work creation: [ 31.139418] kasan_save_stack+0x22/0x50 [ 31.139925] __kasan_record_aux_stack+0x8e/0xa0 [ 31.140509] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.141154] remove_vma+0x139/0x170 [ 31.141610] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.142190] do_vmi_munmap+0x1f1/0x2b0 [ 31.142682] __vm_munmap+0x138/0x3a0 [ 31.143155] __x64_sys_munmap+0x59/0x80 [ 31.143663] do_syscall_64+0x3f/0x90 [ 31.144143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.144796] [ 31.145015] The buggy address belongs to the object at ffff88800ef7f740 [ 31.145015] which belongs to the cache vm_area_struct of size 168 [ 31.146522] The buggy address is located 88 bytes inside of [ 31.146522] freed 168-byte region [ffff88800ef7f740, ffff88800ef7f7e8) [ 31.147950] [ 31.148166] The buggy address belongs to the physical page: [ 31.148837] page:000000006f4bec22 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef7f [ 31.149932] memcg:ffff888019edf701 [ 31.150365] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.151017] page_type: 0xffffffff() [ 31.151474] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.152409] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019edf701 [ 31.153324] page dumped because: kasan: bad access detected [ 31.154013] [ 31.154231] Memory state around the buggy address: [ 31.154830] ffff88800ef7f680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.155701] ffff88800ef7f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.156570] >ffff88800ef7f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.157438] ^ [ 31.157944] ffff88800ef7f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.158817] ffff88800ef7f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.159677] ================================================================== [ 31.160644] Disabling lock debugging due to kernel taint [ 33.156063] BUG: Bad rss-counter state mm:00000000a5e2a547 type:MM_FILEPAGES val:33 [ 33.157064] BUG: Bad rss-counter state mm:00000000a5e2a547 type:MM_ANONPAGES val:22 [ 33.651467] BUG: Bad rss-counter state mm:00000000c8a1df12 type:MM_FILEPAGES val:33 [ 33.652615] BUG: Bad rss-counter state mm:00000000c8a1df12 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21933' (ECDSA) to the list of known hosts. 2023/06/20 14:30:55 fuzzer started 2023/06/20 14:30:55 dialing manager at localhost:36067 2023/06/20 14:30:55 checking machine... 2023/06/20 14:30:55 checking revisions... [ 34.364000] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:30:55 testing simple program... [ 34.413499] cgroup: Unknown subsys name 'net' [ 34.463590] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:30:55 Registers: info registers vcpu 0 RAX=00000000fbad248c RBX=00005629610b5f80 RCX=0000000000000000 RDX=0000000000080000 RSI=00007f2a262fa15e RDI=00000000ffffff9c RBP=0000000000000008 RSP=00007fff8d9268b0 R8 =0000000000080000 R9 =00007f2a262fa15e R10=0000000000000000 R11=0000000000000287 R12=0000000000000008 R13=00005629610b5f80 R14=0000000000000001 R15=00005629610ae7b0 RIP=00007f2a267790e0 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2a26304900 00000000 00000000 GS =0000 0000000000000000 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=00007f2a268bc0b0 CR3=000000000d39c000 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=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 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=00007efef9a71880 CR3=000000000c794000 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=d80ca74c381307bb384fe55c97909c6b XMM02=000000000011a000ec2efd57dc4c00df XMM03=0000000000121870eda0f7e3aeb0df3b XMM04=32630325e564553900000000000ae988 XMM05=9d887dbafa43b6440000000000132480 XMM06=4fda316b135da52b0000000000131520 XMM07=e042d86d42eb936e0000000000121af0 XMM08=eda0f7e3aeb0df3b000000000011a060 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000