[ 31.957064] BUG: Bad rss-counter state mm:00000000937105fa type:MM_FILEPAGES val:33 [ 31.958072] BUG: Bad rss-counter state mm:00000000937105fa type:MM_ANONPAGES val:22 [ 32.127832] ================================================================== [ 32.128792] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.129792] Read of size 8 at addr ffff888015d9ac20 by task sshd/219 [ 32.130785] [ 32.131016] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.131921] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.132962] Call Trace: [ 32.133303] [ 32.133606] dump_stack_lvl+0x91/0xf0 [ 32.134128] print_report+0xcc/0x620 [ 32.134633] ? __virt_addr_valid+0x102/0x340 [ 32.135211] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.135856] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.136494] kasan_report+0xbe/0xf0 [ 32.136996] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.137668] vma_interval_tree_remove+0xc75/0xec0 [ 32.138306] vma_prepare+0xc54/0x11a0 [ 32.138809] __split_vma+0x5af/0x950 [ 32.139309] ? __pfx___split_vma+0x10/0x10 [ 32.139864] ? find_held_lock+0x2c/0x110 [ 32.140409] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.141000] ? lock_is_held_type+0x9f/0x120 [ 32.141572] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.142211] ? mtree_range_walk+0x632/0x900 [ 32.142785] ? mas_walk+0x5c7/0x7c0 [ 32.143283] do_vmi_munmap+0x1f1/0x2b0 [ 32.143805] mmap_region+0x1f9/0x2660 [ 32.144315] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.144854] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.145623] ? __pfx_lock_acquire+0x10/0x10 [ 32.146187] ? __pfx_mmap_region+0x10/0x10 [ 32.146742] ? security_mmap_addr+0x7d/0xa0 [ 32.147299] ? get_unmapped_area+0x1f5/0x3f0 [ 32.147875] do_mmap+0x854/0xf00 [ 32.148341] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.148863] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.149465] ksys_mmap_pgoff+0x3af/0x500 [ 32.149997] do_syscall_64+0x3f/0x90 [ 32.150502] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.151187] RIP: 0033:0x7f30f59c7d82 [ 32.151667] 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 [ 32.153905] RSP: 002b:00007fff24699658 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.154851] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f30f59c7d82 [ 32.155733] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f30f4e01000 [ 32.156614] RBP: 00007f30f4e01000 R08: 0000000000000009 R09: 0000000000001000 [ 32.157524] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562a0dbf7ec0 [ 32.158409] R13: 00007fff24699670 R14: 00007fff246996a0 R15: 00007fff24699a00 [ 32.159304] [ 32.159611] [ 32.159839] Allocated by task 212: [ 32.160288] kasan_save_stack+0x22/0x50 [ 32.160812] kasan_set_track+0x25/0x30 [ 32.161337] __kasan_slab_alloc+0x59/0x70 [ 32.161889] kmem_cache_alloc+0x16b/0x370 [ 32.162435] vm_area_dup+0x20/0x160 [ 32.162906] __split_vma+0x170/0x950 [ 32.163389] split_vma+0xc6/0x110 [ 32.163840] mprotect_fixup+0x8d2/0xb30 [ 32.164360] do_mprotect_pkey+0x87e/0xd40 [ 32.164902] __x64_sys_mprotect+0x78/0xc0 [ 32.165451] do_syscall_64+0x3f/0x90 [ 32.165938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.166594] [ 32.166812] Freed by task 203: [ 32.167219] kasan_save_stack+0x22/0x50 [ 32.167736] kasan_set_track+0x25/0x30 [ 32.168250] kasan_save_free_info+0x2b/0x50 [ 32.168804] __kasan_slab_free+0x10a/0x190 [ 32.169366] kmem_cache_free+0x10d/0x4d0 [ 32.169886] rcu_core+0x8c8/0x2860 [ 32.170342] __do_softirq+0x1b7/0x7d4 [ 32.170833] [ 32.171052] Last potentially related work creation: [ 32.171656] kasan_save_stack+0x22/0x50 [ 32.172176] __kasan_record_aux_stack+0x8e/0xa0 [ 32.172771] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.173443] remove_vma+0x139/0x170 [ 32.173912] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.174491] do_vmi_munmap+0x1f1/0x2b0 [ 32.174991] __vm_munmap+0x138/0x3a0 [ 32.175466] __x64_sys_munmap+0x59/0x80 [ 32.175976] do_syscall_64+0x3f/0x90 [ 32.176460] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.177123] [ 32.177361] The buggy address belongs to the object at ffff888015d9abc8 [ 32.177361] which belongs to the cache vm_area_struct of size 168 [ 32.178861] The buggy address is located 88 bytes inside of [ 32.178861] freed 168-byte region [ffff888015d9abc8, ffff888015d9ac70) [ 32.180300] [ 32.180519] The buggy address belongs to the physical page: [ 32.181194] page:0000000093ceaa0e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15d9a [ 32.182319] memcg:ffff88800dc42801 [ 32.182753] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.183478] page_type: 0xffffffff() [ 32.183937] raw: 0100000000000200 ffff88800879fc80 ffffea0000377c00 0000000000000003 [ 32.184879] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc42801 [ 32.185803] page dumped because: kasan: bad access detected [ 32.186480] [ 32.186704] Memory state around the buggy address: [ 32.187305] ffff888015d9ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.188178] ffff888015d9ab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.189043] >ffff888015d9ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.189925] ^ [ 32.190464] ffff888015d9ac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.191323] ffff888015d9ad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.192185] ================================================================== [ 32.193455] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.050550] BUG: Bad rss-counter state mm:000000001e1b1de0 type:MM_FILEPAGES val:33 [ 35.051577] BUG: Bad rss-counter state mm:000000001e1b1de0 type:MM_ANONPAGES val:22 [ 35.550159] BUG: Bad rss-counter state mm:0000000070f8596a type:MM_FILEPAGES val:33 [ 35.551140] BUG: Bad rss-counter state mm:0000000070f8596a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62859' (ECDSA) to the list of known hosts. 2023/06/19 23:07:19 fuzzer started 2023/06/19 23:07:20 dialing manager at localhost:44161 2023/06/19 23:07:20 checking machine... 2023/06/19 23:07:20 checking revisions... [ 36.278644] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:07:20 testing simple program... [ 36.331484] cgroup: Unknown subsys name 'net' [ 36.394292] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:07:19 Registers: info registers vcpu 0 RAX=1ffff1100165b369 RBX=ffff88800b2d9b18 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800b2d9b48 RBP=ffff88800a828ee8 RSP=ffff88801943f8e8 R8 =0000000000000001 R9 =ffffed1003287f11 R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88800e129280 R14=ffffffff8366dfdf R15=ffff88800da3db80 RIP=ffffffff81846362 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 00007f8ffdd27700 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=00007f723848c028 CR3=00000000090fa000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732039313a3730 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363535 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=dffffc0000000000 RBX=ffff88801c5972b8 RCX=0000000000000001 RDX=1ffff110038b2e75 RSI=ffffffff846000aa RDI=ffff88801c5972c4 RBP=ffff88801c5973a8 RSP=ffff88801c5971d0 R8 =0000000000000001 R9 =ffff88801c597230 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88801c5972b8 R13=0000000000000000 R14=ffff88801472d1c0 R15=0000000000001000 RIP=ffffffff813ad4f7 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7624845900 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=00007ffd75130000 CR3=000000000d8f4000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000