[ 26.010062] BUG: Bad rss-counter state mm:000000006af005b4 type:MM_FILEPAGES val:33 [ 26.011091] BUG: Bad rss-counter state mm:000000006af005b4 type:MM_ANONPAGES val:22 [ 26.115914] ================================================================== [ 26.116994] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.117699] Read of size 8 at addr ffff88801be23d08 by task sshd/219 [ 26.118234] [ 26.118391] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.119108] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.119829] Call Trace: [ 26.120077] [ 26.120297] dump_stack_lvl+0x91/0xf0 [ 26.120654] print_report+0xcc/0x620 [ 26.121004] ? __virt_addr_valid+0x102/0x340 [ 26.121395] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.121829] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.122260] kasan_report+0xbe/0xf0 [ 26.122597] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.123031] vma_interval_tree_remove+0xc75/0xec0 [ 26.123457] vma_prepare+0xc54/0x11a0 [ 26.123799] __split_vma+0x5af/0x950 [ 26.124131] ? __pfx___split_vma+0x10/0x10 [ 26.124515] ? find_held_lock+0x2c/0x110 [ 26.124886] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.125285] ? lock_is_held_type+0x9f/0x120 [ 26.125666] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.126093] ? mtree_range_walk+0x632/0x900 [ 26.126488] ? mas_walk+0x5c7/0x7c0 [ 26.126823] do_vmi_munmap+0x1f1/0x2b0 [ 26.127172] mmap_region+0x1f9/0x2660 [ 26.127518] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.127879] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.128408] ? __pfx_lock_acquire+0x10/0x10 [ 26.128787] ? __pfx_mmap_region+0x10/0x10 [ 26.129161] ? security_mmap_addr+0x7d/0xa0 [ 26.129441] ? get_unmapped_area+0x1f5/0x3f0 [ 26.129720] do_mmap+0x854/0xf00 [ 26.129948] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.130202] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.130488] ksys_mmap_pgoff+0x3af/0x500 [ 26.130745] do_syscall_64+0x3f/0x90 [ 26.130987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.131316] RIP: 0033:0x7ff19b97ad82 [ 26.131551] 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 [ 26.132636] RSP: 002b:00007fffe4124578 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.133091] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff19b97ad82 [ 26.133519] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff19adb4000 [ 26.133943] RBP: 00007ff19adb4000 R08: 0000000000000009 R09: 0000000000001000 [ 26.134376] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c1cd24bf70 [ 26.134802] R13: 00007fffe4124590 R14: 00007fffe41245c0 R15: 00007fffe4124920 [ 26.135240] [ 26.135389] [ 26.135499] Allocated by task 211: [ 26.135718] kasan_save_stack+0x22/0x50 [ 26.135975] kasan_set_track+0x25/0x30 [ 26.136232] __kasan_slab_alloc+0x59/0x70 [ 26.136498] kmem_cache_alloc+0x16b/0x370 [ 26.136759] vm_area_dup+0x20/0x160 [ 26.136992] __split_vma+0x170/0x950 [ 26.137231] split_vma+0xc6/0x110 [ 26.137456] mprotect_fixup+0x8d2/0xb30 [ 26.137713] do_mprotect_pkey+0x87e/0xd40 [ 26.137979] __x64_sys_mprotect+0x78/0xc0 [ 26.138253] do_syscall_64+0x3f/0x90 [ 26.138496] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.138822] [ 26.138931] Freed by task 13: [ 26.139127] kasan_save_stack+0x22/0x50 [ 26.139384] kasan_set_track+0x25/0x30 [ 26.139636] kasan_save_free_info+0x2b/0x50 [ 26.139910] __kasan_slab_free+0x10a/0x190 [ 26.140182] kmem_cache_free+0x10d/0x4d0 [ 26.140453] rcu_core+0x8c8/0x2860 [ 26.140681] __do_softirq+0x1b7/0x7d4 [ 26.140922] [ 26.141034] Last potentially related work creation: [ 26.141333] kasan_save_stack+0x22/0x50 [ 26.141589] __kasan_record_aux_stack+0x8e/0xa0 [ 26.141880] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.142225] remove_vma+0x139/0x170 [ 26.142510] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.142875] do_vmi_munmap+0x1f1/0x2b0 [ 26.143133] __vm_munmap+0x138/0x3a0 [ 26.143435] __x64_sys_munmap+0x59/0x80 [ 26.143754] do_syscall_64+0x3f/0x90 [ 26.144059] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.144479] [ 26.144619] The buggy address belongs to the object at ffff88801be23cb0 [ 26.144619] which belongs to the cache vm_area_struct of size 168 [ 26.145602] The buggy address is located 88 bytes inside of [ 26.145602] freed 168-byte region [ffff88801be23cb0, ffff88801be23d58) [ 26.146531] [ 26.146669] The buggy address belongs to the physical page: [ 26.147103] page:000000008ca4f9f4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1be23 [ 26.147828] memcg:ffff88801bdd4601 [ 26.148105] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.148558] page_type: 0xffffffff() [ 26.148856] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 26.149459] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bdd4601 [ 26.150061] page dumped because: kasan: bad access detected [ 26.150505] [ 26.150646] Memory state around the buggy address: [ 26.151024] ffff88801be23c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 26.151593] ffff88801be23c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 26.152153] >ffff88801be23d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 26.152715] ^ [ 26.153001] ffff88801be23d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 26.153572] ffff88801be23e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 26.154130] ================================================================== [ 26.154756] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.780460] BUG: Bad rss-counter state mm:0000000002a2761d type:MM_FILEPAGES val:33 [ 27.781764] BUG: Bad rss-counter state mm:0000000002a2761d type:MM_ANONPAGES val:22 [ 28.302289] BUG: Bad rss-counter state mm:00000000c3e160d9 type:MM_FILEPAGES val:33 [ 28.303648] BUG: Bad rss-counter state mm:00000000c3e160d9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63051' (ECDSA) to the list of known hosts. 2023/06/20 02:50:30 fuzzer started 2023/06/20 02:50:30 dialing manager at localhost:44161 2023/06/20 02:50:30 checking machine... 2023/06/20 02:50:30 checking revisions... [ 29.032108] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:50:30 testing simple program... [ 29.076937] cgroup: Unknown subsys name 'net' [ 29.120920] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:50:28 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888014261b40 RSI=ffffffff818ea1e8 RDI=0000000000000005 RBP=0000000000000003 RSP=ffff888015b778c8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000040 R13=ffff888008c10f60 R14=ffff888015b77a30 R15=dffffc0000000000 RIP=ffffffff818ea219 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 00007f5fc5c3e700 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=00007f99b56090b0 CR3=000000000d650000 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=30353a3230203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303337 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=0000000000000001 RBX=0000000000000002 RCX=ffff888008e28000 RDX=ffff888008e27d01 RSI=ffff888008e27dc0 RDI=ffff88806cf09a88 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =0000000000000000 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000b523e R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff888008e27dc8 R15=ffff88806cf09a78 RIP=ffffffff81131039 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 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=00007fc6dce490e0 CR3=000000000da38000 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=b5f0b03bb26a22900340ae3b98a38793 XMM02=000000000011e080eff9b2d0a8fce9cb XMM03=000000000011e1502c67c8bc2e329bc3 XMM04=52eebe307e25108800000000000ae988 XMM05=dfcdbad4f1609c370000000000133bf0 XMM06=175337a7d65bb6af0000000000132dc8 XMM07=e042d86d42eb936e0000000000124658 XMM08=3a998f5827f91a9d000000000011e150 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000