syzkaller login: [ 30.682727] BUG: Bad rss-counter state mm:00000000b183c4c1 type:MM_FILEPAGES val:33 [ 30.684612] BUG: Bad rss-counter state mm:00000000b183c4c1 type:MM_ANONPAGES val:22 [ 30.854117] ================================================================== [ 30.855105] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.856131] Read of size 8 at addr ffff888017abbc20 by task sshd/221 [ 30.857129] [ 30.857367] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.858293] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.859352] Call Trace: [ 30.859700] [ 30.860029] dump_stack_lvl+0x91/0xf0 [ 30.860559] print_report+0xcc/0x620 [ 30.861080] ? __virt_addr_valid+0x102/0x340 [ 30.861665] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.862325] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.862988] kasan_report+0xbe/0xf0 [ 30.863517] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.864216] vma_interval_tree_remove+0xc75/0xec0 [ 30.864885] vma_prepare+0xc54/0x11a0 [ 30.865410] __split_vma+0x5af/0x950 [ 30.865935] ? __pfx___split_vma+0x10/0x10 [ 30.866504] ? find_held_lock+0x2c/0x110 [ 30.867061] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.867665] ? lock_is_held_type+0x9f/0x120 [ 30.868251] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.868896] ? mtree_range_walk+0x632/0x900 [ 30.869488] ? mas_walk+0x5c7/0x7c0 [ 30.870002] do_vmi_munmap+0x1f1/0x2b0 [ 30.870533] mmap_region+0x1f9/0x2660 [ 30.871055] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.871603] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.872387] ? __pfx_lock_acquire+0x10/0x10 [ 30.873073] ? __pfx_mmap_region+0x10/0x10 [ 30.873612] ? security_mmap_addr+0x7d/0xa0 [ 30.874146] ? get_unmapped_area+0x1f5/0x3f0 [ 30.874698] do_mmap+0x854/0xf00 [ 30.875147] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.875647] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.876224] ksys_mmap_pgoff+0x3af/0x500 [ 30.876740] do_syscall_64+0x3f/0x90 [ 30.877226] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.877881] RIP: 0033:0x7f565e4e5d82 [ 30.878342] 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 [ 30.880475] RSP: 002b:00007ffc8b4a97d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.881383] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f565e4e5d82 [ 30.882239] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f565d91f000 [ 30.883156] RBP: 00007f565d91f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.884089] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563575a32ec0 [ 30.884994] R13: 00007ffc8b4a97f0 R14: 00007ffc8b4a9820 R15: 00007ffc8b4a9b80 [ 30.885913] [ 30.886225] [ 30.886455] Allocated by task 214: [ 30.886924] kasan_save_stack+0x22/0x50 [ 30.887453] kasan_set_track+0x25/0x30 [ 30.887983] __kasan_slab_alloc+0x59/0x70 [ 30.888540] kmem_cache_alloc+0x16b/0x370 [ 30.889084] vm_area_dup+0x20/0x160 [ 30.889555] __split_vma+0x170/0x950 [ 30.890051] split_vma+0xc6/0x110 [ 30.890524] mprotect_fixup+0x8d2/0xb30 [ 30.891057] do_mprotect_pkey+0x87e/0xd40 [ 30.891600] __x64_sys_mprotect+0x78/0xc0 [ 30.892176] do_syscall_64+0x3f/0x90 [ 30.892683] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.893361] [ 30.893594] Freed by task 214: [ 30.894007] kasan_save_stack+0x22/0x50 [ 30.894559] kasan_set_track+0x25/0x30 [ 30.895096] kasan_save_free_info+0x2b/0x50 [ 30.895666] __kasan_slab_free+0x10a/0x190 [ 30.896249] kmem_cache_free+0x10d/0x4d0 [ 30.896785] rcu_core+0x8c8/0x2860 [ 30.897250] __do_softirq+0x1b7/0x7d4 [ 30.897751] [ 30.897980] Last potentially related work creation: [ 30.898707] kasan_save_stack+0x22/0x50 [ 30.899234] __kasan_record_aux_stack+0x8e/0xa0 [ 30.899858] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.900539] remove_vma+0x139/0x170 [ 30.901016] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.901617] do_vmi_munmap+0x1f1/0x2b0 [ 30.902139] __vm_munmap+0x138/0x3a0 [ 30.902633] __x64_sys_munmap+0x59/0x80 [ 30.903160] do_syscall_64+0x3f/0x90 [ 30.903677] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.904359] [ 30.904592] The buggy address belongs to the object at ffff888017abbbc8 [ 30.904592] which belongs to the cache vm_area_struct of size 168 [ 30.906182] The buggy address is located 88 bytes inside of [ 30.906182] freed 168-byte region [ffff888017abbbc8, ffff888017abbc70) [ 30.907696] [ 30.907931] The buggy address belongs to the physical page: [ 30.908644] page:00000000255cf71a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17abb [ 30.909814] memcg:ffff88801790b801 [ 30.910282] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.910980] page_type: 0xffffffff() [ 30.911435] raw: 0100000000000200 ffff8880087a0c80 ffffea00005e9980 dead000000000007 [ 30.912378] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801790b801 [ 30.913291] page dumped because: kasan: bad access detected [ 30.913979] [ 30.914206] Memory state around the buggy address: [ 30.914820] ffff888017abbb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.915854] ffff888017abbb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.916945] >ffff888017abbc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.918019] ^ [ 30.918687] ffff888017abbc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.919765] ffff888017abbd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.920854] ================================================================== [ 30.922086] Disabling lock debugging due to kernel taint [ 33.101980] BUG: Bad rss-counter state mm:000000006e83432f type:MM_FILEPAGES val:33 [ 33.103098] BUG: Bad rss-counter state mm:000000006e83432f type:MM_ANONPAGES val:22 [ 33.584932] BUG: Bad rss-counter state mm:00000000aad88b93 type:MM_FILEPAGES val:33 [ 33.586015] BUG: Bad rss-counter state mm:00000000aad88b93 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48537' (ECDSA) to the list of known hosts. 2023/06/21 06:36:17 fuzzer started 2023/06/21 06:36:17 dialing manager at localhost:36067 2023/06/21 06:36:17 checking machine... 2023/06/21 06:36:17 checking revisions... [ 34.321866] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:36:18 testing simple program... [ 34.376288] cgroup: Unknown subsys name 'net' [ 34.430928] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:36:17 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=1ffff11001b7bda2 RDX=1ffff11001b7bdc0 RSI=00000000000000fb RDI=ffffed1001b7bda2 RBP=ffffffff813782f8 RSP=ffff88806ce09e00 R8 =0000000000000130 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800dbded10 R13=ffff88800844f780 R14=ffffffff813782f8 R15=ffff88800dbded90 RIP=ffffffff81810074 RFL=00000216 [----AP-] 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 00007f1248279900 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=00007f1247669f10 CR3=000000000c7f8000 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=a551e43f9aa862a8bd47153b7e8d6524 XMM02=ec2efd57dc4c00df000000000011d940 XMM03=5d639b99ef7dcabb000000000011da10 XMM04=b629d4933d2b651c00000000000ae988 XMM05=218e8673878fd16a00000000001330b8 XMM06=d7135d8ce0bc33760000000000131e58 XMM07=fb795ef6d65770560000000000122150 XMM08=2c67c8bc2e329bc3000000000011d9b0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11001df3fb2 RSI=ffffffff81710df5 RDI=0000000000000005 RBP=ffff88800ef9fd90 RSP=ffff88800ef9fc00 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffea00006dbf40 R13=ffff88800ffdb9f8 R14=ffff88800ef9fdb8 R15=ffffea00006dbf74 RIP=ffffffff81710e0a 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f91de666900 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=00007f91df1ba044 CR3=00000000169ea000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=70f41f8a715fbe4d03460a15397dc3ca XMM05=00000000000000000000000000000000 XMM06=70731f63635f733d03460a153973733d XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000