syzkaller login: [ 30.092067] BUG: Bad rss-counter state mm:0000000092b68cc9 type:MM_FILEPAGES val:33 [ 30.094040] BUG: Bad rss-counter state mm:0000000092b68cc9 type:MM_ANONPAGES val:22 [ 30.248891] ================================================================== [ 30.249980] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.251126] Read of size 8 at addr ffff88800e715228 by task sshd/218 [ 30.252104] [ 30.252326] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.253197] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.254181] Call Trace: [ 30.254512] [ 30.254801] dump_stack_lvl+0x91/0xf0 [ 30.255304] print_report+0xcc/0x620 [ 30.255802] ? __virt_addr_valid+0x102/0x340 [ 30.256358] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.256990] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.257611] kasan_report+0xbe/0xf0 [ 30.258095] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.258734] vma_interval_tree_remove+0xc75/0xec0 [ 30.259350] vma_prepare+0xc54/0x11a0 [ 30.259829] __split_vma+0x5af/0x950 [ 30.260306] ? __pfx___split_vma+0x10/0x10 [ 30.260834] ? find_held_lock+0x2c/0x110 [ 30.261359] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.261924] ? lock_is_held_type+0x9f/0x120 [ 30.262504] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.263121] ? mtree_range_walk+0x632/0x900 [ 30.263669] ? mas_walk+0x5c7/0x7c0 [ 30.264143] do_vmi_munmap+0x1f1/0x2b0 [ 30.264637] mmap_region+0x1f9/0x2660 [ 30.265122] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.265642] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.266364] ? __pfx_lock_acquire+0x10/0x10 [ 30.266899] ? __pfx_mmap_region+0x10/0x10 [ 30.267429] ? security_mmap_addr+0x7d/0xa0 [ 30.267957] ? get_unmapped_area+0x1f5/0x3f0 [ 30.268520] do_mmap+0x854/0xf00 [ 30.268960] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.269459] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.270019] ksys_mmap_pgoff+0x3af/0x500 [ 30.270541] do_syscall_64+0x3f/0x90 [ 30.271017] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.271661] RIP: 0033:0x7f81e6687d82 [ 30.272116] 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 [ 30.274255] RSP: 002b:00007ffc1e97d138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.275179] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f81e6687d82 [ 30.276026] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f81e5ac1000 [ 30.276871] RBP: 00007f81e5ac1000 R08: 0000000000000009 R09: 0000000000001000 [ 30.277710] R10: 0000000000000812 R11: 0000000000000206 R12: 000055af6cbb6d90 [ 30.278574] R13: 00007ffc1e97d150 R14: 00007ffc1e97d180 R15: 00007ffc1e97d4e0 [ 30.279433] [ 30.279723] [ 30.279941] Allocated by task 211: [ 30.280373] kasan_save_stack+0x22/0x50 [ 30.280880] kasan_set_track+0x25/0x30 [ 30.281384] __kasan_slab_alloc+0x59/0x70 [ 30.281917] kmem_cache_alloc+0x16b/0x370 [ 30.282444] vm_area_dup+0x20/0x160 [ 30.282897] __split_vma+0x170/0x950 [ 30.283371] split_vma+0xc6/0x110 [ 30.283815] mprotect_fixup+0x8d2/0xb30 [ 30.284320] do_mprotect_pkey+0x87e/0xd40 [ 30.284837] __x64_sys_mprotect+0x78/0xc0 [ 30.285369] do_syscall_64+0x3f/0x90 [ 30.285854] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.286520] [ 30.286740] Freed by task 211: [ 30.287133] kasan_save_stack+0x22/0x50 [ 30.287640] kasan_set_track+0x25/0x30 [ 30.288137] kasan_save_free_info+0x2b/0x50 [ 30.288676] __kasan_slab_free+0x10a/0x190 [ 30.289207] kmem_cache_free+0x10d/0x4d0 [ 30.289726] rcu_core+0x8c8/0x2860 [ 30.290175] __do_softirq+0x1b7/0x7d4 [ 30.290657] [ 30.290871] Last potentially related work creation: [ 30.291461] kasan_save_stack+0x22/0x50 [ 30.291968] __kasan_record_aux_stack+0x8e/0xa0 [ 30.292546] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.293199] remove_vma+0x139/0x170 [ 30.293720] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.294287] do_vmi_munmap+0x1f1/0x2b0 [ 30.294799] __vm_munmap+0x138/0x3a0 [ 30.295267] __x64_sys_munmap+0x59/0x80 [ 30.295775] do_syscall_64+0x3f/0x90 [ 30.296252] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.296894] [ 30.297111] Second to last potentially related work creation: [ 30.297795] kasan_save_stack+0x22/0x50 [ 30.298299] __kasan_record_aux_stack+0x8e/0xa0 [ 30.298886] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.299524] remove_vma+0x139/0x170 [ 30.299989] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.300558] do_vmi_munmap+0x1f1/0x2b0 [ 30.301048] mmap_region+0x1f9/0x2660 [ 30.301528] do_mmap+0x854/0xf00 [ 30.301961] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.302456] ksys_mmap_pgoff+0x3af/0x500 [ 30.302957] do_syscall_64+0x3f/0x90 [ 30.303437] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.304079] [ 30.304299] The buggy address belongs to the object at ffff88800e7151d0 [ 30.304299] which belongs to the cache vm_area_struct of size 168 [ 30.305777] The buggy address is located 88 bytes inside of [ 30.305777] freed 168-byte region [ffff88800e7151d0, ffff88800e715278) [ 30.307221] [ 30.307441] The buggy address belongs to the physical page: [ 30.308104] page:0000000068828be2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe715 [ 30.309193] memcg:ffff88800e32b601 [ 30.309630] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.310329] page_type: 0xffffffff() [ 30.310787] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 30.311708] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e32b601 [ 30.312619] page dumped because: kasan: bad access detected [ 30.313286] [ 30.313504] Memory state around the buggy address: [ 30.314089] ffff88800e715100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.314954] ffff88800e715180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.315810] >ffff88800e715200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.316655] ^ [ 30.317208] ffff88800e715280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.318060] ffff88800e715300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.318921] ================================================================== [ 30.319856] Disabling lock debugging due to kernel taint [ 32.339191] BUG: Bad rss-counter state mm:000000001c08f0cf type:MM_FILEPAGES val:33 [ 32.340184] BUG: Bad rss-counter state mm:000000001c08f0cf type:MM_ANONPAGES val:22 [ 32.870705] BUG: Bad rss-counter state mm:00000000dfcdc584 type:MM_FILEPAGES val:33 [ 32.871698] BUG: Bad rss-counter state mm:00000000dfcdc584 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5828' (ECDSA) to the list of known hosts. 2023/06/20 04:58:04 fuzzer started 2023/06/20 04:58:04 dialing manager at localhost:44161 2023/06/20 04:58:04 checking machine... 2023/06/20 04:58:04 checking revisions... [ 33.488112] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:58:05 testing simple program... [ 33.530099] cgroup: Unknown subsys name 'net' [ 33.579563] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:58:03 Registers: info registers vcpu 0 RAX=ffffffff83636790 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888019047c01 RSI=ffff888019047c58 RDI=ffff888019047c58 RBP=ffff888019047920 RSP=ffff888019047858 R8 =0000000000000001 R9 =ffff888019047908 R10=0000000000038001 R11=000000000000fc0f R12=ffff888019047928 R13=ffff888019047910 R14=ffff888019047c58 R15=ffff8880190478c8 RIP=ffffffff81131236 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 00007f7d78d9e900 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=00007fff0ebb9000 CR3=00000000137d4000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0ba77db RBX=fffffbfff0ba77db RCX=ffffffff8153425b RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88806cf09dc8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000200 R13=0000000000000001 R14=ffffffff813782a8 R15=ffff88800ede9ec0 RIP=ffffffff8180f004 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 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=00007f310a603640 CR3=000000000dbfa000 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=e761cef5220c88ba874ee8033d9af635 XMM02=ec2efd57dc4c00df000000000011fac8 XMM03=65889dd9b8d55200000000000011fb98 XMM04=42c75b79ff5b9e5200000000000ae988 XMM05=dfcdbad4f1609c3700000000001351e0 XMM06=806171799158d9670000000000135068 XMM07=e042d86d42eb936e0000000000123d88 XMM08=65889dd9b8d55200000000000011fb98 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000