syzkaller login: [ 30.833032] BUG: Bad rss-counter state mm:000000001d286d35 type:MM_FILEPAGES val:33 [ 30.834293] BUG: Bad rss-counter state mm:000000001d286d35 type:MM_ANONPAGES val:22 [ 30.869697] ================================================================== [ 30.870732] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.871840] Read of size 8 at addr ffff8880199cd310 by task sshd/221 [ 30.872716] [ 30.872962] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.873920] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.875001] Call Trace: [ 30.875348] [ 30.875663] dump_stack_lvl+0x91/0xf0 [ 30.876205] print_report+0xcc/0x620 [ 30.876772] ? __virt_addr_valid+0x102/0x340 [ 30.877385] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.878078] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.878762] kasan_report+0xbe/0xf0 [ 30.879297] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.879990] vma_interval_tree_remove+0xc75/0xec0 [ 30.880710] vma_prepare+0xc54/0x11a0 [ 30.881245] __split_vma+0x5af/0x950 [ 30.881767] ? __pfx___split_vma+0x10/0x10 [ 30.882351] ? find_held_lock+0x2c/0x110 [ 30.882929] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.883560] ? lock_is_held_type+0x9f/0x120 [ 30.884154] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.884849] ? mtree_range_walk+0x632/0x900 [ 30.885463] ? mas_walk+0x5c7/0x7c0 [ 30.885995] do_vmi_munmap+0x1f1/0x2b0 [ 30.886547] mmap_region+0x1f9/0x2660 [ 30.887100] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.887689] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.888539] ? __pfx_lock_acquire+0x10/0x10 [ 30.889069] ? __pfx_mmap_region+0x10/0x10 [ 30.889601] ? security_mmap_addr+0x7d/0xa0 [ 30.890125] ? get_unmapped_area+0x1f5/0x3f0 [ 30.890668] do_mmap+0x854/0xf00 [ 30.891100] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.891589] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.892149] ksys_mmap_pgoff+0x3af/0x500 [ 30.892677] do_syscall_64+0x3f/0x90 [ 30.893152] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.893806] RIP: 0033:0x7f060f3b4d82 [ 30.894264] 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 [ 30.896385] RSP: 002b:00007ffe338d82c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.897294] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f060f3b4d82 [ 30.898137] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f060e7ee000 [ 30.898973] RBP: 00007f060e7ee000 R08: 0000000000000009 R09: 0000000000001000 [ 30.899816] R10: 0000000000000812 R11: 0000000000000206 R12: 00005560d85f3d90 [ 30.900697] R13: 00007ffe338d82e0 R14: 00007ffe338d8310 R15: 00007ffe338d8670 [ 30.901548] [ 30.901840] [ 30.902061] Allocated by task 214: [ 30.902490] kasan_save_stack+0x22/0x50 [ 30.902994] kasan_set_track+0x25/0x30 [ 30.903494] __kasan_slab_alloc+0x59/0x70 [ 30.904021] kmem_cache_alloc+0x16b/0x370 [ 30.904565] vm_area_dup+0x20/0x160 [ 30.905027] __split_vma+0x170/0x950 [ 30.905493] split_vma+0xc6/0x110 [ 30.905939] mprotect_fixup+0x8d2/0xb30 [ 30.906447] do_mprotect_pkey+0x87e/0xd40 [ 30.906971] __x64_sys_mprotect+0x78/0xc0 [ 30.907489] do_syscall_64+0x3f/0x90 [ 30.907967] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.908665] [ 30.908885] Freed by task 214: [ 30.909279] kasan_save_stack+0x22/0x50 [ 30.909799] kasan_set_track+0x25/0x30 [ 30.910315] kasan_save_free_info+0x2b/0x50 [ 30.910880] __kasan_slab_free+0x10a/0x190 [ 30.911422] kmem_cache_free+0x10d/0x4d0 [ 30.911952] rcu_core+0x8c8/0x2860 [ 30.912427] __do_softirq+0x1b7/0x7d4 [ 30.912939] [ 30.913161] Last potentially related work creation: [ 30.913765] kasan_save_stack+0x22/0x50 [ 30.914291] __kasan_record_aux_stack+0x8e/0xa0 [ 30.914894] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.915565] remove_vma+0x139/0x170 [ 30.916036] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.916641] do_vmi_munmap+0x1f1/0x2b0 [ 30.917148] __vm_munmap+0x138/0x3a0 [ 30.917640] __x64_sys_munmap+0x59/0x80 [ 30.918154] do_syscall_64+0x3f/0x90 [ 30.918648] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.919316] [ 30.919539] The buggy address belongs to the object at ffff8880199cd2b8 [ 30.919539] which belongs to the cache vm_area_struct of size 168 [ 30.921103] The buggy address is located 88 bytes inside of [ 30.921103] freed 168-byte region [ffff8880199cd2b8, ffff8880199cd360) [ 30.922576] [ 30.922796] The buggy address belongs to the physical page: [ 30.923480] page:000000009b0ab199 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x199cd [ 30.924653] memcg:ffff888019b15901 [ 30.925100] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.925780] page_type: 0xffffffff() [ 30.926253] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.927224] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019b15901 [ 30.928186] page dumped because: kasan: bad access detected [ 30.928917] [ 30.929142] Memory state around the buggy address: [ 30.929747] ffff8880199cd200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.930645] ffff8880199cd280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.931538] >ffff8880199cd300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.932450] ^ [ 30.932946] ffff8880199cd380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.933852] ffff8880199cd400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.934748] ================================================================== [ 30.935834] Disabling lock debugging due to kernel taint [ 32.864080] BUG: Bad rss-counter state mm:000000002e0bb8af type:MM_FILEPAGES val:33 [ 32.865080] BUG: Bad rss-counter state mm:000000002e0bb8af type:MM_ANONPAGES val:22 [ 33.430745] BUG: Bad rss-counter state mm:0000000098d70f2a type:MM_FILEPAGES val:33 [ 33.431914] BUG: Bad rss-counter state mm:0000000098d70f2a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27627' (ECDSA) to the list of known hosts. 2023/06/20 16:55:25 fuzzer started 2023/06/20 16:55:25 dialing manager at localhost:36067 2023/06/20 16:55:25 checking machine... 2023/06/20 16:55:25 checking revisions... [ 34.082704] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:55:25 testing simple program... [ 34.132673] cgroup: Unknown subsys name 'net' [ 34.185340] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:55:25 Registers: info registers vcpu 0 RAX=ffffffff813782f8 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008d9fa01 RSI=ffff888008d9fa10 RDI=ffff888008d9fa10 RBP=ffff888008d9f9d0 RSP=ffff888008d9f8b8 R8 =0000000000000001 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000003c0d R12=ffff888008d9f9d8 R13=ffff888008d9f9c0 R14=ffff888008d9fa10 R15=ffff888008d9f978 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 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=00007f375ddad650 CR3=000000000e662000 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=35353a3631203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732035323a3535 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303639 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ff89374a6e0 CR3=000000000d9a6000 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=3c3323b9bdecaa9e714496ae7e2cb3d6 XMM02=2c67c8bc2e329bc3000000000011b660 XMM03=fb795ef6d65770560000000000122368 XMM04=fa3fbaa39740d57500000000000ae988 XMM05=5e8cf03c563718000000000000132f78 XMM06=c291bd5c70af25b90000000000132018 XMM07=e042d86d42eb936e00000000001225e8 XMM08=a3e8c2d4dd8bc077000000000011b6c0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000