[ 23.971585] BUG: Bad rss-counter state mm:000000004215de71 type:MM_FILEPAGES val:33 [ 23.972388] BUG: Bad rss-counter state mm:000000004215de71 type:MM_ANONPAGES val:22 [ 24.137193] ================================================================== [ 24.138249] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.139372] Read of size 8 at addr ffff88800d4bfb38 by task sshd/221 [ 24.140392] [ 24.140598] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.141406] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.142345] Call Trace: [ 24.142645] [ 24.142914] dump_stack_lvl+0x91/0xf0 [ 24.143383] print_report+0xcc/0x620 [ 24.143852] ? __virt_addr_valid+0x102/0x340 [ 24.144385] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.144961] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.145534] kasan_report+0xbe/0xf0 [ 24.145988] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.146577] vma_interval_tree_remove+0xc75/0xec0 [ 24.147150] vma_prepare+0xc54/0x11a0 [ 24.147656] __split_vma+0x5af/0x950 [ 24.148115] ? __pfx___split_vma+0x10/0x10 [ 24.148633] ? find_held_lock+0x2c/0x110 [ 24.149145] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.149711] ? lock_is_held_type+0x9f/0x120 [ 24.150245] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.150844] ? mtree_range_walk+0x632/0x900 [ 24.151399] ? mas_walk+0x5c7/0x7c0 [ 24.151881] do_vmi_munmap+0x1f1/0x2b0 [ 24.152373] mmap_region+0x1f9/0x2660 [ 24.152846] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.153346] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.154059] ? __pfx_lock_acquire+0x10/0x10 [ 24.154592] ? __pfx_mmap_region+0x10/0x10 [ 24.155124] ? security_mmap_addr+0x7d/0xa0 [ 24.155663] ? get_unmapped_area+0x1f5/0x3f0 [ 24.156204] do_mmap+0x854/0xf00 [ 24.156638] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.157135] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.157687] ksys_mmap_pgoff+0x3af/0x500 [ 24.158188] do_syscall_64+0x3f/0x90 [ 24.158658] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.159308] RIP: 0033:0x7f0b127dfd82 [ 24.159783] 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 [ 24.161850] RSP: 002b:00007ffd199f9308 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.162767] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0b127dfd82 [ 24.163628] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0b11c19000 [ 24.164461] RBP: 00007f0b11c19000 R08: 0000000000000009 R09: 0000000000001000 [ 24.165297] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b6672fbec0 [ 24.166141] R13: 00007ffd199f9320 R14: 00007ffd199f9350 R15: 00007ffd199f96b0 [ 24.166995] [ 24.167287] [ 24.167504] Allocated by task 212: [ 24.167947] kasan_save_stack+0x22/0x50 [ 24.168447] kasan_set_track+0x25/0x30 [ 24.168931] __kasan_slab_alloc+0x59/0x70 [ 24.169443] kmem_cache_alloc+0x16b/0x370 [ 24.169949] vm_area_dup+0x20/0x160 [ 24.170404] __split_vma+0x170/0x950 [ 24.170877] split_vma+0xc6/0x110 [ 24.171305] mprotect_fixup+0x8d2/0xb30 [ 24.171806] do_mprotect_pkey+0x87e/0xd40 [ 24.172332] __x64_sys_mprotect+0x78/0xc0 [ 24.172850] do_syscall_64+0x3f/0x90 [ 24.173309] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.173951] [ 24.174167] Freed by task 205: [ 24.174558] kasan_save_stack+0x22/0x50 [ 24.175060] kasan_set_track+0x25/0x30 [ 24.175553] kasan_save_free_info+0x2b/0x50 [ 24.176091] __kasan_slab_free+0x10a/0x190 [ 24.176624] kmem_cache_free+0x10d/0x4d0 [ 24.177128] rcu_core+0x8c8/0x2860 [ 24.177560] __do_softirq+0x1b7/0x7d4 [ 24.178038] [ 24.178258] Last potentially related work creation: [ 24.178845] kasan_save_stack+0x22/0x50 [ 24.179351] __kasan_record_aux_stack+0x8e/0xa0 [ 24.179930] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.180558] remove_vma+0x139/0x170 [ 24.181002] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.181611] do_vmi_munmap+0x1f1/0x2b0 [ 24.182095] __vm_munmap+0x138/0x3a0 [ 24.182570] __x64_sys_munmap+0x59/0x80 [ 24.183060] do_syscall_64+0x3f/0x90 [ 24.183534] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.184179] [ 24.184393] Second to last potentially related work creation: [ 24.185068] kasan_save_stack+0x22/0x50 [ 24.185568] __kasan_record_aux_stack+0x8e/0xa0 [ 24.186143] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.186779] remove_vma+0x139/0x170 [ 24.187230] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.187780] do_vmi_munmap+0x1f1/0x2b0 [ 24.188261] mmap_region+0x1f9/0x2660 [ 24.188731] do_mmap+0x854/0xf00 [ 24.189148] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.189636] ksys_mmap_pgoff+0x3af/0x500 [ 24.190142] do_syscall_64+0x3f/0x90 [ 24.190616] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.191255] [ 24.191470] The buggy address belongs to the object at ffff88800d4bfae0 [ 24.191470] which belongs to the cache vm_area_struct of size 168 [ 24.192941] The buggy address is located 88 bytes inside of [ 24.192941] freed 168-byte region [ffff88800d4bfae0, ffff88800d4bfb88) [ 24.194321] [ 24.194531] The buggy address belongs to the physical page: [ 24.195190] page:0000000081b3554b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd4bf [ 24.196267] memcg:ffff88800d20c401 [ 24.196696] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.197388] page_type: 0xffffffff() [ 24.197837] raw: 0100000000000200 ffff8880087a0c80 ffffea000035b440 dead000000000005 [ 24.198701] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d20c401 [ 24.199553] page dumped because: kasan: bad access detected [ 24.200183] [ 24.200392] Memory state around the buggy address: [ 24.200936] ffff88800d4bfa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.201735] ffff88800d4bfa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 24.202543] >ffff88800d4bfb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.203343] ^ [ 24.203933] ffff88800d4bfb80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 24.204736] ffff88800d4bfc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 24.205534] ================================================================== [ 24.206396] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.819194] BUG: Bad rss-counter state mm:000000001c26ce1e type:MM_FILEPAGES val:33 [ 25.820009] BUG: Bad rss-counter state mm:000000001c26ce1e type:MM_ANONPAGES val:22 [ 26.331553] BUG: Bad rss-counter state mm:0000000037deb900 type:MM_FILEPAGES val:33 [ 26.332739] BUG: Bad rss-counter state mm:0000000037deb900 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16712' (ECDSA) to the list of known hosts. 2023/06/21 10:40:24 fuzzer started 2023/06/21 10:40:25 dialing manager at localhost:36067 2023/06/21 10:40:25 checking machine... 2023/06/21 10:40:25 checking revisions... [ 26.932595] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:40:25 testing simple program... [ 26.987386] cgroup: Unknown subsys name 'net' [ 27.025654] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:40:24 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800fe175a0 RCX=0000000000000001 RDX=1ffff11001fc2ebf RSI=ffff88800fe17910 RDI=ffff88800fe175a0 RBP=ffff88800fe175f8 RSP=ffff88800fe17588 R8 =0000000000000001 R9 =ffff88800fe175e0 R10=0000000000038001 R11=000000000008b5c1 R12=ffff88800fe17668 R13=0000000000000000 R14=ffff88801a02d1c0 R15=ffff888017804ab0 RIP=ffffffff8113038e 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 00007f27e04d0900 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=00007fffe38ed000 CR3=000000000e0ce000 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=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 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=0000000000000001 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=00007ff8ad3cb950 CR3=000000000f634000 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=2034323a30343a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a30343a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000