syzkaller login: [ 30.940857] BUG: Bad rss-counter state mm:000000008409eef4 type:MM_FILEPAGES val:33 [ 30.942040] BUG: Bad rss-counter state mm:000000008409eef4 type:MM_ANONPAGES val:22 [ 31.115066] ================================================================== [ 31.116028] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.116983] Read of size 8 at addr ffff88800e1fd880 by task sshd/220 [ 31.117863] [ 31.118083] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.118960] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.119965] Call Trace: [ 31.120298] [ 31.120581] dump_stack_lvl+0x91/0xf0 [ 31.121084] print_report+0xcc/0x620 [ 31.121570] ? __virt_addr_valid+0x102/0x340 [ 31.122127] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.122753] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.123366] kasan_report+0xbe/0xf0 [ 31.123854] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.124489] vma_interval_tree_remove+0xc75/0xec0 [ 31.125099] vma_prepare+0xc54/0x11a0 [ 31.125581] __split_vma+0x5af/0x950 [ 31.126048] ? __pfx___split_vma+0x10/0x10 [ 31.126607] ? find_held_lock+0x2c/0x110 [ 31.127130] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.127710] ? lock_is_held_type+0x9f/0x120 [ 31.128262] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.128890] ? mtree_range_walk+0x632/0x900 [ 31.129460] ? mas_walk+0x5c7/0x7c0 [ 31.129936] do_vmi_munmap+0x1f1/0x2b0 [ 31.130443] mmap_region+0x1f9/0x2660 [ 31.130928] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.131450] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.132176] ? __pfx_lock_acquire+0x10/0x10 [ 31.132739] ? __pfx_mmap_region+0x10/0x10 [ 31.133275] ? security_mmap_addr+0x7d/0xa0 [ 31.133816] ? get_unmapped_area+0x1f5/0x3f0 [ 31.134373] do_mmap+0x854/0xf00 [ 31.134840] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.135341] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.135917] ksys_mmap_pgoff+0x3af/0x500 [ 31.136431] do_syscall_64+0x3f/0x90 [ 31.136922] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.137581] RIP: 0033:0x7f95a3645d82 [ 31.138041] 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 [ 31.140172] RSP: 002b:00007fff5c71aec8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.141085] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f95a3645d82 [ 31.141941] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f95a2a7f000 [ 31.142806] RBP: 00007f95a2a7f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.143666] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e8b1521b20 [ 31.144507] R13: 00007fff5c71aee0 R14: 00007fff5c71af10 R15: 00007fff5c71b270 [ 31.145370] [ 31.145672] [ 31.145889] Allocated by task 213: [ 31.146319] kasan_save_stack+0x22/0x50 [ 31.146847] kasan_set_track+0x25/0x30 [ 31.147341] __kasan_slab_alloc+0x59/0x70 [ 31.147873] kmem_cache_alloc+0x16b/0x370 [ 31.148395] vm_area_dup+0x20/0x160 [ 31.148862] __split_vma+0x170/0x950 [ 31.149343] split_vma+0xc6/0x110 [ 31.149780] mprotect_fixup+0x8d2/0xb30 [ 31.150282] do_mprotect_pkey+0x87e/0xd40 [ 31.150824] __x64_sys_mprotect+0x78/0xc0 [ 31.151351] do_syscall_64+0x3f/0x90 [ 31.151829] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.152487] [ 31.152705] Freed by task 13: [ 31.153091] kasan_save_stack+0x22/0x50 [ 31.153595] kasan_set_track+0x25/0x30 [ 31.154084] kasan_save_free_info+0x2b/0x50 [ 31.154643] __kasan_slab_free+0x10a/0x190 [ 31.155185] kmem_cache_free+0x10d/0x4d0 [ 31.155698] rcu_core+0x8c8/0x2860 [ 31.156152] __do_softirq+0x1b7/0x7d4 [ 31.156642] [ 31.156858] Last potentially related work creation: [ 31.157443] kasan_save_stack+0x22/0x50 [ 31.157945] __kasan_record_aux_stack+0x8e/0xa0 [ 31.158541] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.159182] remove_vma+0x139/0x170 [ 31.159638] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.160203] do_vmi_munmap+0x1f1/0x2b0 [ 31.160696] __vm_munmap+0x138/0x3a0 [ 31.161172] __x64_sys_munmap+0x59/0x80 [ 31.161677] do_syscall_64+0x3f/0x90 [ 31.162161] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.162824] [ 31.163042] The buggy address belongs to the object at ffff88800e1fd828 [ 31.163042] which belongs to the cache vm_area_struct of size 168 [ 31.164516] The buggy address is located 88 bytes inside of [ 31.164516] freed 168-byte region [ffff88800e1fd828, ffff88800e1fd8d0) [ 31.165928] [ 31.166146] The buggy address belongs to the physical page: [ 31.166837] page:00000000f06d889b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1fd [ 31.167943] memcg:ffff88800e324c01 [ 31.168381] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.169076] page_type: 0xffffffff() [ 31.169536] raw: 0100000000000200 ffff8880087a0c80 ffffea0000380ec0 dead000000000007 [ 31.170480] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e324c01 [ 31.171394] page dumped because: kasan: bad access detected [ 31.172060] [ 31.172282] Memory state around the buggy address: [ 31.172874] ffff88800e1fd780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.173742] ffff88800e1fd800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.174627] >ffff88800e1fd880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.175489] ^ [ 31.175912] ffff88800e1fd900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.176779] ffff88800e1fd980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.177649] ================================================================== [ 31.178702] Disabling lock debugging due to kernel taint [ 33.107529] BUG: Bad rss-counter state mm:0000000099434484 type:MM_FILEPAGES val:33 [ 33.108561] BUG: Bad rss-counter state mm:0000000099434484 type:MM_ANONPAGES val:22 [ 33.597683] BUG: Bad rss-counter state mm:00000000c4217231 type:MM_FILEPAGES val:33 [ 33.598847] BUG: Bad rss-counter state mm:00000000c4217231 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37054' (ECDSA) to the list of known hosts. 2023/06/20 21:48:06 fuzzer started 2023/06/20 21:48:06 dialing manager at localhost:36067 2023/06/20 21:48:06 checking machine... 2023/06/20 21:48:06 checking revisions... [ 34.349043] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:48:06 testing simple program... [ 34.399512] cgroup: Unknown subsys name 'net' [ 34.442178] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:48:05 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=00007fe616799ef0 CR3=000000000e51a000 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=38343a3132203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323436 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=0000000000000000 RBX=ffff888016fd78d0 RCX=0000000000000001 RDX=1ffff11002dfaf1b RSI=ffffffff846000aa RDI=ffff888016fd78d8 RBP=0000000000000013 RSP=ffff888016fd77e8 R8 =0000000000000001 R9 =ffff888016fd7848 R10=0000000000038001 R11=00000000000b5080 R12=ffff888016fd78d0 R13=0000000000000000 R14=ffff888016301b40 R15=0000000080110010 RIP=ffffffff813ad4d5 RFL=00000283 [--S---C] 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 00007f3154808900 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=00007f3154dc00b0 CR3=00000000168b8000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000