[ 30.903005] BUG: Bad rss-counter state mm:00000000d2123bd2 type:MM_FILEPAGES val:33 [ 30.904662] BUG: Bad rss-counter state mm:00000000d2123bd2 type:MM_ANONPAGES val:22 [ 31.067840] ================================================================== [ 31.068976] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.070160] Read of size 8 at addr ffff88801591ded8 by task sshd/219 [ 31.071157] [ 31.071417] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.072485] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.073709] Call Trace: [ 31.074097] [ 31.074446] dump_stack_lvl+0x91/0xf0 [ 31.075044] print_report+0xcc/0x620 [ 31.075648] ? __virt_addr_valid+0x102/0x340 [ 31.076314] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.077059] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.077827] kasan_report+0xbe/0xf0 [ 31.078395] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.079165] vma_interval_tree_remove+0xc75/0xec0 [ 31.079898] vma_prepare+0xc54/0x11a0 [ 31.080481] __split_vma+0x5af/0x950 [ 31.081046] ? __pfx___split_vma+0x10/0x10 [ 31.081700] ? find_held_lock+0x2c/0x110 [ 31.082325] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.083013] ? lock_is_held_type+0x9f/0x120 [ 31.083677] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.084417] ? mtree_range_walk+0x632/0x900 [ 31.085077] ? mas_walk+0x5c7/0x7c0 [ 31.085650] do_vmi_munmap+0x1f1/0x2b0 [ 31.086245] mmap_region+0x1f9/0x2660 [ 31.086838] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.087457] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.088337] ? __pfx_lock_acquire+0x10/0x10 [ 31.088973] ? __pfx_mmap_region+0x10/0x10 [ 31.089620] ? security_mmap_addr+0x7d/0xa0 [ 31.090262] ? get_unmapped_area+0x1f5/0x3f0 [ 31.090930] do_mmap+0x854/0xf00 [ 31.091450] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.092056] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.092744] ksys_mmap_pgoff+0x3af/0x500 [ 31.093368] do_syscall_64+0x3f/0x90 [ 31.093943] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.094737] RIP: 0033:0x7fb55a145d82 [ 31.095292] 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 [ 31.097908] RSP: 002b:00007ffe4be42038 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.099027] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb55a145d82 [ 31.100072] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb55957f000 [ 31.101106] RBP: 00007fb55957f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.102136] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d97a6a6d90 [ 31.103171] R13: 00007ffe4be42050 R14: 00007ffe4be42080 R15: 00007ffe4be423e0 [ 31.104226] [ 31.104586] [ 31.104849] Allocated by task 212: [ 31.105380] kasan_save_stack+0x22/0x50 [ 31.105993] kasan_set_track+0x25/0x30 [ 31.106590] __kasan_slab_alloc+0x59/0x70 [ 31.107218] kmem_cache_alloc+0x16b/0x370 [ 31.107871] vm_area_dup+0x20/0x160 [ 31.108417] __split_vma+0x170/0x950 [ 31.108989] split_vma+0xc6/0x110 [ 31.109521] mprotect_fixup+0x8d2/0xb30 [ 31.110144] do_mprotect_pkey+0x87e/0xd40 [ 31.110773] __x64_sys_mprotect+0x78/0xc0 [ 31.111411] do_syscall_64+0x3f/0x90 [ 31.111947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.112562] [ 31.112774] Freed by task 13: [ 31.113135] kasan_save_stack+0x22/0x50 [ 31.113619] kasan_set_track+0x25/0x30 [ 31.114087] kasan_save_free_info+0x2b/0x50 [ 31.114594] __kasan_slab_free+0x10a/0x190 [ 31.115100] kmem_cache_free+0x10d/0x4d0 [ 31.115612] rcu_core+0x8c8/0x2860 [ 31.116035] __do_softirq+0x1b7/0x7d4 [ 31.116484] [ 31.116694] Last potentially related work creation: [ 31.117241] kasan_save_stack+0x22/0x50 [ 31.117713] __kasan_record_aux_stack+0x8e/0xa0 [ 31.118260] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.118870] remove_vma+0x139/0x170 [ 31.119302] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.119836] do_vmi_munmap+0x1f1/0x2b0 [ 31.120294] __vm_munmap+0x138/0x3a0 [ 31.120735] __x64_sys_munmap+0x59/0x80 [ 31.121200] do_syscall_64+0x3f/0x90 [ 31.121648] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.122250] [ 31.122467] The buggy address belongs to the object at ffff88801591de80 [ 31.122467] which belongs to the cache vm_area_struct of size 168 [ 31.123934] The buggy address is located 88 bytes inside of [ 31.123934] freed 168-byte region [ffff88801591de80, ffff88801591df28) [ 31.125338] [ 31.125551] The buggy address belongs to the physical page: [ 31.126207] page:000000001030c553 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1591d [ 31.127295] memcg:ffff888019f99a01 [ 31.127733] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.128382] page_type: 0xffffffff() [ 31.128835] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.129751] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f99a01 [ 31.130651] page dumped because: kasan: bad access detected [ 31.131311] [ 31.131528] Memory state around the buggy address: [ 31.132120] ffff88801591dd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.132973] ffff88801591de00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.133821] >ffff88801591de80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.134660] ^ [ 31.135370] ffff88801591df00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.136227] ffff88801591df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.137068] ================================================================== [ 31.138019] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.026436] BUG: Bad rss-counter state mm:00000000a114734e type:MM_FILEPAGES val:33 [ 33.027646] BUG: Bad rss-counter state mm:00000000a114734e type:MM_ANONPAGES val:22 [ 33.506303] BUG: Bad rss-counter state mm:00000000a0f33028 type:MM_FILEPAGES val:33 [ 33.507951] BUG: Bad rss-counter state mm:00000000a0f33028 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37445' (ECDSA) to the list of known hosts. 2023/06/21 04:07:41 fuzzer started 2023/06/21 04:07:42 dialing manager at localhost:36067 2023/06/21 04:07:42 checking machine... 2023/06/21 04:07:42 checking revisions... [ 34.256124] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:07:42 testing simple program... [ 34.316555] cgroup: Unknown subsys name 'net' [ 34.369926] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:07:41 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=ffff888008c04000 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=00007ffcd3280fd8 CR3=0000000018ec4000 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=2031343a37303a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a37303a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100371371d RBX=ffff88801b89b8b8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88801b89b8e8 RBP=ffff888019221658 RSP=ffff88806cf09db8 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff888019235a40 R14=ffffffff818d9c06 R15=ffff88800da0f900 RIP=ffffffff818464ec 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 00007f5a20d2b900 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=00007ffcb1c0c000 CR3=000000000eaea000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000