[ 32.058987] BUG: Bad rss-counter state mm:0000000045433a14 type:MM_FILEPAGES val:33 [ 32.060503] BUG: Bad rss-counter state mm:0000000045433a14 type:MM_ANONPAGES val:22 [ 32.100448] ================================================================== [ 32.101314] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.102378] Read of size 8 at addr ffff888019d17228 by task sshd/227 [ 32.103253] [ 32.103464] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.104307] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.105298] Call Trace: [ 32.105612] [ 32.105890] dump_stack_lvl+0x91/0xf0 [ 32.106372] print_report+0xcc/0x620 [ 32.106848] ? __virt_addr_valid+0x102/0x340 [ 32.107388] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.107993] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.108607] kasan_report+0xbe/0xf0 [ 32.109075] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.109687] vma_interval_tree_remove+0xc75/0xec0 [ 32.110281] vma_prepare+0xc54/0x11a0 [ 32.110759] __split_vma+0x5af/0x950 [ 32.111224] ? __pfx___split_vma+0x10/0x10 [ 32.111741] ? find_held_lock+0x2c/0x110 [ 32.112254] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.112825] ? lock_is_held_type+0x9f/0x120 [ 32.113362] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.113968] ? mtree_range_walk+0x632/0x900 [ 32.114511] ? mas_walk+0x5c7/0x7c0 [ 32.114981] do_vmi_munmap+0x1f1/0x2b0 [ 32.115472] mmap_region+0x1f9/0x2660 [ 32.115948] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.116455] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.117158] ? __pfx_lock_acquire+0x10/0x10 [ 32.117681] ? __pfx_mmap_region+0x10/0x10 [ 32.118195] ? security_mmap_addr+0x7d/0xa0 [ 32.118709] ? get_unmapped_area+0x1f5/0x3f0 [ 32.119241] do_mmap+0x854/0xf00 [ 32.119669] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.120151] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.120708] ksys_mmap_pgoff+0x3af/0x500 [ 32.121200] do_syscall_64+0x3f/0x90 [ 32.121667] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.122295] RIP: 0033:0x7f989b610d82 [ 32.122740] 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 [ 32.124817] RSP: 002b:00007fff2ad10868 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.125695] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f989b610d82 [ 32.126531] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f989aa4a000 [ 32.127363] RBP: 00007f989aa4a000 R08: 0000000000000009 R09: 0000000000001000 [ 32.128189] R10: 0000000000000812 R11: 0000000000000206 R12: 00005570be495ec0 [ 32.129039] R13: 00007fff2ad10880 R14: 00007fff2ad108b0 R15: 00007fff2ad10c10 [ 32.129885] [ 32.130176] [ 32.130387] Allocated by task 220: [ 32.130814] kasan_save_stack+0x22/0x50 [ 32.131321] kasan_set_track+0x25/0x30 [ 32.131812] __kasan_slab_alloc+0x59/0x70 [ 32.132330] kmem_cache_alloc+0x16b/0x370 [ 32.132862] vm_area_dup+0x20/0x160 [ 32.133315] __split_vma+0x170/0x950 [ 32.133774] split_vma+0xc6/0x110 [ 32.134205] mprotect_fixup+0x8d2/0xb30 [ 32.134703] do_mprotect_pkey+0x87e/0xd40 [ 32.135222] __x64_sys_mprotect+0x78/0xc0 [ 32.135739] do_syscall_64+0x3f/0x90 [ 32.136207] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.136859] [ 32.137074] Freed by task 220: [ 32.137465] kasan_save_stack+0x22/0x50 [ 32.137965] kasan_set_track+0x25/0x30 [ 32.138456] kasan_save_free_info+0x2b/0x50 [ 32.138986] __kasan_slab_free+0x10a/0x190 [ 32.139515] kmem_cache_free+0x10d/0x4d0 [ 32.140020] rcu_core+0x8c8/0x2860 [ 32.140471] __do_softirq+0x1b7/0x7d4 [ 32.140947] [ 32.141161] Last potentially related work creation: [ 32.141737] kasan_save_stack+0x22/0x50 [ 32.142232] __kasan_record_aux_stack+0x8e/0xa0 [ 32.142809] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.143445] remove_vma+0x139/0x170 [ 32.143893] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.144443] do_vmi_munmap+0x1f1/0x2b0 [ 32.144923] __vm_munmap+0x138/0x3a0 [ 32.145387] __x64_sys_munmap+0x59/0x80 [ 32.145882] do_syscall_64+0x3f/0x90 [ 32.146353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.146989] [ 32.147203] The buggy address belongs to the object at ffff888019d171d0 [ 32.147203] which belongs to the cache vm_area_struct of size 168 [ 32.148671] The buggy address is located 88 bytes inside of [ 32.148671] freed 168-byte region [ffff888019d171d0, ffff888019d17278) [ 32.150069] [ 32.150284] The buggy address belongs to the physical page: [ 32.150939] page:00000000c6c597f8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d17 [ 32.152242] memcg:ffff88800ecaa901 [ 32.152818] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.153669] page_type: 0xffffffff() [ 32.154200] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 32.155170] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ecaa901 [ 32.156124] page dumped because: kasan: bad access detected [ 32.156842] [ 32.157078] Memory state around the buggy address: [ 32.157679] ffff888019d17100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.158593] ffff888019d17180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.159513] >ffff888019d17200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.160388] ^ [ 32.161007] ffff888019d17280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.162079] ffff888019d17300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.162946] ================================================================== [ 32.164151] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.167713] BUG: Bad rss-counter state mm:00000000c496ad52 type:MM_FILEPAGES val:33 [ 34.169247] BUG: Bad rss-counter state mm:00000000c496ad52 type:MM_ANONPAGES val:22 [ 34.728572] BUG: Bad rss-counter state mm:000000001d53bcb5 type:MM_FILEPAGES val:33 [ 34.729716] BUG: Bad rss-counter state mm:000000001d53bcb5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31582' (ECDSA) to the list of known hosts. 2023/06/20 17:26:05 fuzzer started 2023/06/20 17:26:05 dialing manager at localhost:36067 2023/06/20 17:26:05 checking machine... 2023/06/20 17:26:05 checking revisions... [ 35.414674] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:26:06 testing simple program... [ 35.474307] cgroup: Unknown subsys name 'net' [ 35.521866] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:26:05 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=0000000000000001 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=00007fb51e07b630 CR3=0000000010098000 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=2035303a36323a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a36323a3731203032 XMM08=656369767265732e4079747465672f6d XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff11002d83f27 RCX=000000000000000c RDX=00007f5bb22f0000 RSI=ffff88806cf38c64 RDI=00007f5bb22f0000 RBP=ffffed100d9e718c RSP=ffff888016c1f938 R8 =ffff88806cf38c58 R9 =ffffed100108b564 R10=ffff88800845ab27 R11=0000000000000000 R12=00007f5bb22f0000 R13=ffffed100d9e718a R14=ffff88806cf38c64 R15=0000000000000001 RIP=ffffffff81145cd2 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 00007f5bb2325900 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=00007f5bb22f4008 CR3=000000000ef72000 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=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