syzkaller login: [ 62.246721] BUG: Bad rss-counter state mm:0000000017cb672a type:MM_FILEPAGES val:33 [ 62.248509] BUG: Bad rss-counter state mm:0000000017cb672a type:MM_ANONPAGES val:22 [ 62.388301] ================================================================== [ 62.389202] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.390144] Read of size 8 at addr ffff888017e60b38 by task sshd/221 [ 62.391005] [ 62.391373] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 62.392478] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.393464] Call Trace: [ 62.393805] [ 62.394094] dump_stack_lvl+0x91/0xf0 [ 62.394585] print_report+0xcc/0x620 [ 62.395122] ? __virt_addr_valid+0x102/0x340 [ 62.395680] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.396299] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.396936] kasan_report+0xbe/0xf0 [ 62.397409] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.398044] vma_interval_tree_remove+0xc75/0xec0 [ 62.398657] vma_prepare+0xc54/0x11a0 [ 62.399179] __split_vma+0x5af/0x950 [ 62.399658] ? __pfx___split_vma+0x10/0x10 [ 62.400203] ? find_held_lock+0x2c/0x110 [ 62.400721] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.401296] ? lock_is_held_type+0x9f/0x120 [ 62.401850] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.402456] ? mtree_range_walk+0x632/0x900 [ 62.403041] ? mas_walk+0x5c7/0x7c0 [ 62.403520] do_vmi_munmap+0x1f1/0x2b0 [ 62.404027] mmap_region+0x1f9/0x2660 [ 62.404516] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.405056] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.405769] ? __pfx_lock_acquire+0x10/0x10 [ 62.406315] ? __pfx_mmap_region+0x10/0x10 [ 62.406871] ? security_mmap_addr+0x7d/0xa0 [ 62.407422] ? get_unmapped_area+0x1f5/0x3f0 [ 62.408010] do_mmap+0x854/0xf00 [ 62.408449] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.408964] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.409531] ksys_mmap_pgoff+0x3af/0x500 [ 62.410059] do_syscall_64+0x3f/0x90 [ 62.410541] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.411245] RIP: 0033:0x7f773164cd82 [ 62.411717] 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 [ 62.413959] RSP: 002b:00007ffd8c3c0ef8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.414920] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f773164cd82 [ 62.415809] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7730a86000 [ 62.416675] RBP: 00007f7730a86000 R08: 0000000000000009 R09: 0000000000001000 [ 62.417552] R10: 0000000000000812 R11: 0000000000000206 R12: 000055803237eb20 [ 62.418413] R13: 00007ffd8c3c0f10 R14: 00007ffd8c3c0f40 R15: 00007ffd8c3c12a0 [ 62.419300] [ 62.419607] [ 62.419843] Allocated by task 214: [ 62.420281] kasan_save_stack+0x22/0x50 [ 62.420816] kasan_set_track+0x25/0x30 [ 62.421307] __kasan_slab_alloc+0x59/0x70 [ 62.421835] kmem_cache_alloc+0x16b/0x370 [ 62.422342] vm_area_dup+0x20/0x160 [ 62.422811] __split_vma+0x170/0x950 [ 62.423313] split_vma+0xc6/0x110 [ 62.423762] mprotect_fixup+0x8d2/0xb30 [ 62.424284] do_mprotect_pkey+0x87e/0xd40 [ 62.424824] __x64_sys_mprotect+0x78/0xc0 [ 62.425343] do_syscall_64+0x3f/0x90 [ 62.425845] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.426486] [ 62.426704] Freed by task 214: [ 62.427141] kasan_save_stack+0x22/0x50 [ 62.427642] kasan_set_track+0x25/0x30 [ 62.428160] kasan_save_free_info+0x2b/0x50 [ 62.428692] __kasan_slab_free+0x10a/0x190 [ 62.429238] kmem_cache_free+0x10d/0x4d0 [ 62.429749] rcu_core+0x8c8/0x2860 [ 62.430205] __do_softirq+0x1b7/0x7d4 [ 62.430681] [ 62.430938] Last potentially related work creation: [ 62.431522] kasan_save_stack+0x22/0x50 [ 62.432047] __kasan_record_aux_stack+0x8e/0xa0 [ 62.432619] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.433451] remove_vma+0x139/0x170 [ 62.433925] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.434485] do_vmi_munmap+0x1f1/0x2b0 [ 62.435031] __vm_munmap+0x138/0x3a0 [ 62.435501] __x64_sys_munmap+0x59/0x80 [ 62.436015] do_syscall_64+0x3f/0x90 [ 62.436486] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.437144] [ 62.437361] The buggy address belongs to the object at ffff888017e60ae0 [ 62.437361] which belongs to the cache vm_area_struct of size 168 [ 62.438867] The buggy address is located 88 bytes inside of [ 62.438867] freed 168-byte region [ffff888017e60ae0, ffff888017e60b88) [ 62.440340] [ 62.440560] The buggy address belongs to the physical page: [ 62.441239] page:000000001b62814d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17e60 [ 62.442355] memcg:ffff888019d88101 [ 62.442794] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.443471] page_type: 0xffffffff() [ 62.443941] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 62.444873] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d88101 [ 62.445805] page dumped because: kasan: bad access detected [ 62.446462] [ 62.446673] Memory state around the buggy address: [ 62.447293] ffff888017e60a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 62.448166] ffff888017e60a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 62.449040] >ffff888017e60b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.449900] ^ [ 62.450514] ffff888017e60b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 62.451406] ffff888017e60c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 62.452274] ================================================================== [ 62.453207] Disabling lock debugging due to kernel taint [ 64.504122] BUG: Bad rss-counter state mm:00000000b427bddd type:MM_FILEPAGES val:33 [ 64.505217] BUG: Bad rss-counter state mm:00000000b427bddd type:MM_ANONPAGES val:22 [ 65.075732] BUG: Bad rss-counter state mm:000000003c841212 type:MM_FILEPAGES val:33 [ 65.076940] BUG: Bad rss-counter state mm:000000003c841212 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22146' (ECDSA) to the list of known hosts. 2023/06/19 12:31:40 fuzzer started 2023/06/19 12:31:41 dialing manager at localhost:44161 2023/06/19 12:31:41 checking machine... 2023/06/19 12:31:41 checking revisions... [ 65.745856] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:31:41 testing simple program... [ 65.800484] cgroup: Unknown subsys name 'net' [ 65.884683] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:31:39 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=ffffffff86137501 RDX=1ffff11003216e0f RSI=ffffffff8180c585 RDI=ffff8880190b6f38 RBP=ffff8880190b6fd0 RSP=ffff8880190b6f28 R8 =ffffffff8613751e R9 =ffff8880190b6f78 R10=0000000000038001 R11=0000000000020d8a R12=ffff8880190b7000 R13=0000000000000000 R14=ffff888019fdd1c0 R15=0000000000092800 RIP=ffffffff811305e0 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 00007f626a82a900 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=00007f626a7f4008 CR3=00000000132fc000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c17061 RBX=0000000000000001 RCX=ffffffff860b8308 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff88806cf09b00 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff860b830c R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000ba82 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff888008e27f30 R15=ffff88806cf09a98 RIP=ffffffff81131118 RFL=00000213 [----A-C] 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=00007f75219f3590 CR3=000000000efa6000 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=2030343a31333a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a31333a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000