[ 39.989972] BUG: Bad rss-counter state mm:000000001f4a4199 type:MM_FILEPAGES val:33 [ 39.990646] BUG: Bad rss-counter state mm:000000001f4a4199 type:MM_ANONPAGES val:22 [ 40.218666] ================================================================== [ 40.219261] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.223903] Read of size 8 at addr ffff88800e06e4e0 by task sshd/222 [ 40.224435] [ 40.224579] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.225145] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.225754] Call Trace: [ 40.225969] [ 40.226192] dump_stack_lvl+0x91/0xf0 [ 40.226520] print_report+0xcc/0x620 [ 40.226832] ? __virt_addr_valid+0x102/0x340 [ 40.227213] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.227602] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.235754] kasan_report+0xbe/0xf0 [ 40.244042] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.244474] vma_interval_tree_remove+0xc75/0xec0 [ 40.244864] vma_prepare+0xc54/0x11a0 [ 40.245179] __split_vma+0x5af/0x950 [ 40.245470] ? __pfx___split_vma+0x10/0x10 [ 40.245819] ? find_held_lock+0x2c/0x110 [ 40.246204] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.246571] ? lock_is_held_type+0x9f/0x120 [ 40.246923] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.247313] ? mtree_range_walk+0x632/0x900 [ 40.247672] ? mas_walk+0x5c7/0x7c0 [ 40.248038] do_vmi_munmap+0x1f1/0x2b0 [ 40.248358] mmap_region+0x1f9/0x2660 [ 40.248672] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.248994] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.249454] ? __pfx_lock_acquire+0x10/0x10 [ 40.249796] ? __pfx_mmap_region+0x10/0x10 [ 40.250169] ? security_mmap_addr+0x7d/0xa0 [ 40.250508] ? get_unmapped_area+0x1f5/0x3f0 [ 40.250854] do_mmap+0x854/0xf00 [ 40.251176] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.251505] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.251902] ksys_mmap_pgoff+0x3af/0x500 [ 40.252256] do_syscall_64+0x3f/0x90 [ 40.252564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.252980] RIP: 0033:0x7fa0fa5bdd82 [ 40.253285] 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 [ 40.254650] RSP: 002b:00007fff59155d88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.255265] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa0fa5bdd82 [ 40.255828] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa0f99f7000 [ 40.256369] RBP: 00007fa0f99f7000 R08: 0000000000000009 R09: 0000000000001000 [ 40.256904] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ae19571f70 [ 40.257491] R13: 00007fff59155da0 R14: 00007fff59155dd0 R15: 00007fff59156130 [ 40.258028] [ 40.258214] [ 40.258353] Allocated by task 213: [ 40.258620] kasan_save_stack+0x22/0x50 [ 40.258944] kasan_set_track+0x25/0x30 [ 40.259281] __kasan_slab_alloc+0x59/0x70 [ 40.259618] kmem_cache_alloc+0x16b/0x370 [ 40.259970] vm_area_dup+0x20/0x160 [ 40.260309] __split_vma+0x170/0x950 [ 40.260604] split_vma+0xc6/0x110 [ 40.260894] mprotect_fixup+0x8d2/0xb30 [ 40.261239] do_mprotect_pkey+0x87e/0xd40 [ 40.261573] __x64_sys_mprotect+0x78/0xc0 [ 40.261902] do_syscall_64+0x3f/0x90 [ 40.262248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.262652] [ 40.262786] Freed by task 213: [ 40.263061] kasan_save_stack+0x22/0x50 [ 40.263376] kasan_set_track+0x25/0x30 [ 40.263687] kasan_save_free_info+0x2b/0x50 [ 40.264072] __kasan_slab_free+0x10a/0x190 [ 40.264446] kmem_cache_free+0x10d/0x4d0 [ 40.264775] rcu_core+0x8c8/0x2860 [ 40.265093] __do_softirq+0x1b7/0x7d4 [ 40.265401] [ 40.265542] Last potentially related work creation: [ 40.265912] kasan_save_stack+0x22/0x50 [ 40.266246] __kasan_record_aux_stack+0x8e/0xa0 [ 40.266615] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.267031] remove_vma+0x139/0x170 [ 40.267324] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.267684] do_vmi_munmap+0x1f1/0x2b0 [ 40.268021] __vm_munmap+0x138/0x3a0 [ 40.268323] __x64_sys_munmap+0x59/0x80 [ 40.268636] do_syscall_64+0x3f/0x90 [ 40.268933] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.269380] [ 40.269517] Second to last potentially related work creation: [ 40.269957] kasan_save_stack+0x22/0x50 [ 40.270301] __kasan_record_aux_stack+0x8e/0xa0 [ 40.270659] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.271065] remove_vma+0x139/0x170 [ 40.271392] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.275795] do_vmi_munmap+0x1f1/0x2b0 [ 40.276142] mmap_region+0x1f9/0x2660 [ 40.276454] do_mmap+0x854/0xf00 [ 40.276721] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.277035] ksys_mmap_pgoff+0x7d/0x500 [ 40.277394] do_syscall_64+0x3f/0x90 [ 40.277702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.278139] [ 40.278274] The buggy address belongs to the object at ffff88800e06e488 [ 40.278274] which belongs to the cache vm_area_struct of size 168 [ 40.279224] The buggy address is located 88 bytes inside of [ 40.279224] freed 168-byte region [ffff88800e06e488, ffff88800e06e530) [ 40.280137] [ 40.280280] The buggy address belongs to the physical page: [ 40.280699] page:000000006a103948 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe06e [ 40.281413] memcg:ffff88800dc27201 [ 40.281685] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.282111] page_type: 0xffffffff() [ 40.282434] raw: 0100000000000200 ffff88800879fc80 ffffea0000377000 dead000000000004 [ 40.283030] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc27201 [ 40.283598] page dumped because: kasan: bad access detected [ 40.288046] [ 40.288223] Memory state around the buggy address: [ 40.288603] ffff88800e06e380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.289173] ffff88800e06e400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 40.289711] >ffff88800e06e480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.290294] ^ [ 40.290771] ffff88800e06e500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 40.291344] ffff88800e06e580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.291907] ================================================================== [ 40.292663] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 44.653884] BUG: Bad rss-counter state mm:00000000406568b2 type:MM_FILEPAGES val:33 [ 44.654543] BUG: Bad rss-counter state mm:00000000406568b2 type:MM_ANONPAGES val:22 [ 45.116084] BUG: Bad rss-counter state mm:00000000c312fc09 type:MM_FILEPAGES val:33 [ 45.116942] BUG: Bad rss-counter state mm:00000000c312fc09 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50018' (ECDSA) to the list of known hosts. 2023/06/20 09:56:54 fuzzer started 2023/06/20 09:56:54 dialing manager at localhost:44161 2023/06/20 09:56:54 checking machine... 2023/06/20 09:56:54 checking revisions... [ 46.095851] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:56:54 testing simple program... [ 46.141255] cgroup: Unknown subsys name 'net' [ 46.194933] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:56:44 Registers: info registers vcpu 0 RAX=1ffffffff0c26e00 RBX=0000000000000001 RCX=ffffffff86137004 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff86137006 RBP=ffff888008d7f9d0 RSP=ffff888008d7f908 R8 =ffffffff86137008 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000020cb4 R12=ffff888008d7f9d8 R13=ffff888008d7f9c0 R14=ffff888008d7fd48 R15=ffff888008d7f978 RIP=ffffffff811311c7 RFL=00000217 [----APC] 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=00007f79bea35000 CR3=00000000147d2000 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=36353a3930203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363538 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=0000000000000072 RBX=00000000000003f8 RCX=0000000000000000 RDX=00000000000003f8 RSI=ffffffff82505fe5 RDI=ffffffff87f6c0a0 RBP=ffffffff87f6c060 RSP=ffff888015bbf980 R8 =0000000000000001 R9 =000000000000000a R10=0000000000000072 R11=000000003a475542 R12=0000000000000072 R13=ffffffff87f6c060 R14=0000000000000010 R15=ffffffff82505fd0 RIP=ffffffff8250603d 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=00007f22afe45328 CR3=00000000147d2000 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=2033353a36353a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a36353a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000