syzkaller login: [ 38.848760] BUG: Bad rss-counter state mm:000000008c090a0d type:MM_FILEPAGES val:33 [ 38.849898] BUG: Bad rss-counter state mm:000000008c090a0d type:MM_ANONPAGES val:22 [ 38.888325] ================================================================== [ 38.889343] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.890324] Read of size 8 at addr ffff88800f5ab5c8 by task sshd/220 [ 38.891106] [ 38.891327] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.892243] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.893248] Call Trace: [ 38.893578] [ 38.893873] dump_stack_lvl+0x91/0xf0 [ 38.894379] print_report+0xcc/0x620 [ 38.894880] ? __virt_addr_valid+0x102/0x340 [ 38.895462] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.896135] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.896777] kasan_report+0xbe/0xf0 [ 38.897279] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.897900] vma_interval_tree_remove+0xc75/0xec0 [ 38.898498] vma_prepare+0xc54/0x11a0 [ 38.898975] __split_vma+0x5af/0x950 [ 38.899449] ? __pfx___split_vma+0x10/0x10 [ 38.899989] ? find_held_lock+0x2c/0x110 [ 38.900507] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.901076] ? lock_is_held_type+0x9f/0x120 [ 38.901616] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.902231] ? mtree_range_walk+0x632/0x900 [ 38.902775] ? mas_walk+0x5c7/0x7c0 [ 38.903245] do_vmi_munmap+0x1f1/0x2b0 [ 38.903735] mmap_region+0x1f9/0x2660 [ 38.904227] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.904737] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.905444] ? __pfx_lock_acquire+0x10/0x10 [ 38.905981] ? __pfx_mmap_region+0x10/0x10 [ 38.906507] ? security_mmap_addr+0x7d/0xa0 [ 38.907033] ? get_unmapped_area+0x1f5/0x3f0 [ 38.907578] do_mmap+0x854/0xf00 [ 38.908024] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.908510] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.909075] ksys_mmap_pgoff+0x3af/0x500 [ 38.909581] do_syscall_64+0x3f/0x90 [ 38.910052] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.910698] RIP: 0033:0x7fd301bc6d82 [ 38.911156] 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 [ 38.913291] RSP: 002b:00007ffc436f5798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.914193] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd301bc6d82 [ 38.915028] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd301000000 [ 38.916060] RBP: 00007fd301000000 R08: 0000000000000009 R09: 0000000000001000 [ 38.916917] R10: 0000000000000812 R11: 0000000000000206 R12: 000056230874cec0 [ 38.917764] R13: 00007ffc436f57b0 R14: 00007ffc436f57e0 R15: 00007ffc436f5b40 [ 38.918615] [ 38.918903] [ 38.919117] Allocated by task 213: [ 38.919539] kasan_save_stack+0x22/0x50 [ 38.920056] kasan_set_track+0x25/0x30 [ 38.920544] __kasan_slab_alloc+0x59/0x70 [ 38.921063] kmem_cache_alloc+0x16b/0x370 [ 38.921573] vm_area_dup+0x20/0x160 [ 38.922023] __split_vma+0x170/0x950 [ 38.922490] split_vma+0xc6/0x110 [ 38.922922] mprotect_fixup+0x8d2/0xb30 [ 38.923419] do_mprotect_pkey+0x87e/0xd40 [ 38.923939] __x64_sys_mprotect+0x78/0xc0 [ 38.924465] do_syscall_64+0x3f/0x90 [ 38.924936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.925578] [ 38.925794] Freed by task 213: [ 38.926181] kasan_save_stack+0x22/0x50 [ 38.926685] kasan_set_track+0x25/0x30 [ 38.927177] kasan_save_free_info+0x2b/0x50 [ 38.927705] __kasan_slab_free+0x10a/0x190 [ 38.928236] kmem_cache_free+0x10d/0x4d0 [ 38.928738] rcu_core+0x8c8/0x2860 [ 38.929180] __do_softirq+0x1b7/0x7d4 [ 38.929664] [ 38.929879] Last potentially related work creation: [ 38.930452] kasan_save_stack+0x22/0x50 [ 38.930948] __kasan_record_aux_stack+0x8e/0xa0 [ 38.931521] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.932180] remove_vma+0x139/0x170 [ 38.932629] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.933184] do_vmi_munmap+0x1f1/0x2b0 [ 38.933665] __vm_munmap+0x138/0x3a0 [ 38.934130] __x64_sys_munmap+0x59/0x80 [ 38.934622] do_syscall_64+0x3f/0x90 [ 38.935095] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.935733] [ 38.935957] The buggy address belongs to the object at ffff88800f5ab570 [ 38.935957] which belongs to the cache vm_area_struct of size 168 [ 38.937419] The buggy address is located 88 bytes inside of [ 38.937419] freed 168-byte region [ffff88800f5ab570, ffff88800f5ab618) [ 38.938797] [ 38.939014] The buggy address belongs to the physical page: [ 38.939663] page:000000003c02fdf1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf5ab [ 38.940745] memcg:ffff88800fc9f901 [ 38.941165] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.941808] page_type: 0xffffffff() [ 38.942256] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.943160] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc9f901 [ 38.944082] page dumped because: kasan: bad access detected [ 38.944734] [ 38.944947] Memory state around the buggy address: [ 38.945524] ffff88800f5ab480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.946372] ffff88800f5ab500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 38.947216] >ffff88800f5ab580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.948085] ^ [ 38.948748] ffff88800f5ab600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.949604] ffff88800f5ab680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.950457] ================================================================== [ 38.951628] Disabling lock debugging due to kernel taint [ 40.862385] BUG: Bad rss-counter state mm:00000000bf2ffaa5 type:MM_FILEPAGES val:33 [ 40.863437] BUG: Bad rss-counter state mm:00000000bf2ffaa5 type:MM_ANONPAGES val:22 [ 41.412215] BUG: Bad rss-counter state mm:0000000054c01b3e type:MM_FILEPAGES val:33 [ 41.413206] BUG: Bad rss-counter state mm:0000000054c01b3e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51713' (ECDSA) to the list of known hosts. 2023/06/21 07:34:11 fuzzer started 2023/06/21 07:34:11 dialing manager at localhost:36067 2023/06/21 07:34:11 checking machine... 2023/06/21 07:34:11 checking revisions... [ 42.038280] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:34:11 testing simple program... [ 42.084371] cgroup: Unknown subsys name 'net' [ 42.184563] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:34:11 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f83600cb430 CR3=000000000c66e000 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=cb500c4fe27390bc384cb2a886d9ef46 XMM02=000000000011b650eff9b2d0a8fce9cb XMM03=000000000011b7202c67c8bc2e329bc3 XMM04=4c604fb0cecf034d00000000000ae988 XMM05=8fcac25e3732efe20000000000132590 XMM06=4fda316b135da52b00000000001312c0 XMM07=e042d86d42eb936e0000000000121b48 XMM08=8bd7270a5a6f2137000000000011b720 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8113b51c RDX=ffff888019c6b680 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff8880180dff58 RSP=ffff8880180dfed0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000003 R11=0000000000000000 R12=0000000000000007 R13=00007ffa1758731c R14=00007ffa1758731c R15=ffff8880182bca00 RIP=ffffffff814c0438 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ffa16a15900 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=00007ffa1758731c CR3=0000000016648000 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=6720646572637465733a4d41503d706f 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