syzkaller login: [ 62.164259] BUG: Bad rss-counter state mm:00000000ffd9f629 type:MM_FILEPAGES val:33 [ 62.164999] BUG: Bad rss-counter state mm:00000000ffd9f629 type:MM_ANONPAGES val:22 [ 62.280784] ================================================================== [ 62.281868] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.283029] Read of size 8 at addr ffff88800e734b38 by task sshd/226 [ 62.283457] [ 62.283580] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 62.284066] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.284611] Call Trace: [ 62.284800] [ 62.284962] dump_stack_lvl+0x91/0xf0 [ 62.285244] print_report+0xcc/0x620 [ 62.285515] ? __virt_addr_valid+0x102/0x340 [ 62.285825] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.286168] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.286508] kasan_report+0xbe/0xf0 [ 62.286779] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.287135] vma_interval_tree_remove+0xc75/0xec0 [ 62.287473] vma_prepare+0xc54/0x11a0 [ 62.287740] __split_vma+0x5af/0x950 [ 62.288007] ? __pfx___split_vma+0x10/0x10 [ 62.288299] ? find_held_lock+0x2c/0x110 [ 62.288594] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.288910] ? lock_is_held_type+0x9f/0x120 [ 62.289213] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.289553] ? mtree_range_walk+0x632/0x900 [ 62.289858] ? mas_walk+0x5c7/0x7c0 [ 62.290143] do_vmi_munmap+0x1f1/0x2b0 [ 62.290431] mmap_region+0x1f9/0x2660 [ 62.290730] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.291033] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.291454] ? __pfx_lock_acquire+0x10/0x10 [ 62.291766] ? __pfx_mmap_region+0x10/0x10 [ 62.292075] ? security_mmap_addr+0x7d/0xa0 [ 62.292383] ? get_unmapped_area+0x1f5/0x3f0 [ 62.292700] do_mmap+0x854/0xf00 [ 62.292955] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.293248] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.293574] ksys_mmap_pgoff+0x3af/0x500 [ 62.293874] do_syscall_64+0x3f/0x90 [ 62.294154] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.294535] RIP: 0033:0x7f374e386d82 [ 62.294806] 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 [ 62.296038] RSP: 002b:00007fffcae22a98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.296575] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f374e386d82 [ 62.297064] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f374d7c0000 [ 62.297555] RBP: 00007f374d7c0000 R08: 0000000000000009 R09: 0000000000001000 [ 62.298043] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560192965ec0 [ 62.298544] R13: 00007fffcae22ab0 R14: 00007fffcae22ae0 R15: 00007fffcae22e40 [ 62.299068] [ 62.299237] [ 62.299361] Allocated by task 219: [ 62.299610] kasan_save_stack+0x22/0x50 [ 62.299904] kasan_set_track+0x25/0x30 [ 62.300187] __kasan_slab_alloc+0x59/0x70 [ 62.300488] kmem_cache_alloc+0x16b/0x370 [ 62.300786] vm_area_dup+0x20/0x160 [ 62.301049] __split_vma+0x170/0x950 [ 62.301316] split_vma+0xc6/0x110 [ 62.301568] mprotect_fixup+0x8d2/0xb30 [ 62.301858] do_mprotect_pkey+0x87e/0xd40 [ 62.302161] __x64_sys_mprotect+0x78/0xc0 [ 62.302457] do_syscall_64+0x3f/0x90 [ 62.302730] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.303100] [ 62.303226] Freed by task 219: [ 62.303454] kasan_save_stack+0x22/0x50 [ 62.303748] kasan_set_track+0x25/0x30 [ 62.304031] kasan_save_free_info+0x2b/0x50 [ 62.304340] __kasan_slab_free+0x10a/0x190 [ 62.304648] kmem_cache_free+0x10d/0x4d0 [ 62.304943] rcu_core+0x8c8/0x2860 [ 62.305203] __do_softirq+0x1b7/0x7d4 [ 62.305478] [ 62.305601] Last potentially related work creation: [ 62.305938] kasan_save_stack+0x22/0x50 [ 62.306239] __kasan_record_aux_stack+0x8e/0xa0 [ 62.306566] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.306954] remove_vma+0x139/0x170 [ 62.307216] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.307539] do_vmi_munmap+0x1f1/0x2b0 [ 62.307818] __vm_munmap+0x138/0x3a0 [ 62.308093] __x64_sys_munmap+0x59/0x80 [ 62.308379] do_syscall_64+0x3f/0x90 [ 62.308654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.309028] [ 62.309153] The buggy address belongs to the object at ffff88800e734ae0 [ 62.309153] which belongs to the cache vm_area_struct of size 168 [ 62.310012] The buggy address is located 88 bytes inside of [ 62.310012] freed 168-byte region [ffff88800e734ae0, ffff88800e734b88) [ 62.310826] [ 62.310953] The buggy address belongs to the physical page: [ 62.311339] page:000000007a0b588c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe734 [ 62.311958] memcg:ffff888019f8f001 [ 62.312210] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.312581] page_type: 0xffffffff() [ 62.312841] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 62.313370] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f8f001 [ 62.313890] page dumped because: kasan: bad access detected [ 62.314277] [ 62.314401] Memory state around the buggy address: [ 62.314738] ffff88800e734a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 62.315236] ffff88800e734a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 62.315734] >ffff88800e734b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.316229] ^ [ 62.316587] ffff88800e734b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 62.317084] ffff88800e734c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 62.317579] ================================================================== [ 62.318336] Disabling lock debugging due to kernel taint [ 64.359696] BUG: Bad rss-counter state mm:00000000a99015b7 type:MM_FILEPAGES val:33 [ 64.361203] BUG: Bad rss-counter state mm:00000000a99015b7 type:MM_ANONPAGES val:22 [ 64.735797] BUG: Bad rss-counter state mm:0000000003b4670b type:MM_FILEPAGES val:33 [ 64.736377] BUG: Bad rss-counter state mm:0000000003b4670b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64465' (ECDSA) to the list of known hosts. 2023/06/19 12:15:58 fuzzer started 2023/06/19 12:15:59 dialing manager at localhost:44161 2023/06/19 12:15:59 checking machine... 2023/06/19 12:15:59 checking revisions... [ 65.327384] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:15:59 testing simple program... [ 65.376684] cgroup: Unknown subsys name 'net' [ 65.427692] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:15:56 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=00007fc5cb834cf0 CR3=0000000016a10000 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=2038353a35313a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a35313a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800e7ba000 RCX=0000000000000000 RDX=ffff8880158d1b40 RSI=ffffffff8364ca75 RDI=ffff88800e7ba060 RBP=ffff888019310000 RSP=ffff888019d17d48 R8 =0000000000000001 R9 =ffffed1001cf740c R10=ffff88800e7ba067 R11=00000000000b6996 R12=0000000000000000 R13=0000000000034000 R14=ffffffff87f94640 R15=0000000000000001 RIP=ffffffff814c081b 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 00007fd6212a9900 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=00007fffae586000 CR3=000000000caac000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000