[ 55.943179] BUG: Bad rss-counter state mm:00000000f2aeed95 type:MM_FILEPAGES val:33 [ 55.944241] BUG: Bad rss-counter state mm:00000000f2aeed95 type:MM_ANONPAGES val:22 [ 56.105366] ================================================================== [ 56.106485] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 56.107618] Read of size 8 at addr ffff888019f66228 by task sshd/229 [ 56.108654] [ 56.108926] CPU: 1 PID: 229 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 56.109952] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 56.111158] Call Trace: [ 56.111530] [ 56.111833] dump_stack_lvl+0x91/0xf0 [ 56.112360] print_report+0xcc/0x620 [ 56.112843] ? __virt_addr_valid+0x102/0x340 [ 56.113392] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.114012] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.114644] kasan_report+0xbe/0xf0 [ 56.115123] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.115750] vma_interval_tree_remove+0xc75/0xec0 [ 56.116389] vma_prepare+0xc54/0x11a0 [ 56.116888] __split_vma+0x5af/0x950 [ 56.117359] ? __pfx___split_vma+0x10/0x10 [ 56.117894] ? find_held_lock+0x2c/0x110 [ 56.118413] do_vmi_align_munmap+0x2ba/0x11f0 [ 56.118991] ? lock_is_held_type+0x9f/0x120 [ 56.119536] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 56.120145] ? mtree_range_walk+0x632/0x900 [ 56.120706] ? mas_walk+0x5c7/0x7c0 [ 56.121179] do_vmi_munmap+0x1f1/0x2b0 [ 56.121674] mmap_region+0x1f9/0x2660 [ 56.122151] ? vm_mmap_pgoff+0x15c/0x3a0 [ 56.122687] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 56.123400] ? __pfx_lock_acquire+0x10/0x10 [ 56.123928] ? __pfx_mmap_region+0x10/0x10 [ 56.124454] ? security_mmap_addr+0x7d/0xa0 [ 56.124982] ? get_unmapped_area+0x1f5/0x3f0 [ 56.125542] do_mmap+0x854/0xf00 [ 56.125982] vm_mmap_pgoff+0x1a6/0x3a0 [ 56.126492] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 56.127059] ksys_mmap_pgoff+0x3af/0x500 [ 56.127569] do_syscall_64+0x3f/0x90 [ 56.128046] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.128696] RIP: 0033:0x7f0f96ce7d82 [ 56.129154] 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 [ 56.131314] RSP: 002b:00007ffc8228ab28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 56.132224] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0f96ce7d82 [ 56.133086] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0f96121000 [ 56.133943] RBP: 00007f0f96121000 R08: 0000000000000009 R09: 0000000000001000 [ 56.134810] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564b9211df60 [ 56.135663] R13: 00007ffc8228ab40 R14: 00007ffc8228ab70 R15: 00007ffc8228aed0 [ 56.136532] [ 56.136826] [ 56.137038] Allocated by task 216: [ 56.137476] kasan_save_stack+0x22/0x50 [ 56.138012] kasan_set_track+0x25/0x30 [ 56.138534] __kasan_slab_alloc+0x59/0x70 [ 56.139062] kmem_cache_alloc+0x16b/0x370 [ 56.139588] vm_area_dup+0x20/0x160 [ 56.140042] __split_vma+0x170/0x950 [ 56.140512] split_vma+0xc6/0x110 [ 56.140950] mprotect_fixup+0x8d2/0xb30 [ 56.141449] do_mprotect_pkey+0x87e/0xd40 [ 56.141977] __x64_sys_mprotect+0x78/0xc0 [ 56.142526] do_syscall_64+0x3f/0x90 [ 56.142998] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.143659] [ 56.143876] Freed by task 19: [ 56.144261] kasan_save_stack+0x22/0x50 [ 56.144771] kasan_set_track+0x25/0x30 [ 56.145275] kasan_save_free_info+0x2b/0x50 [ 56.145815] __kasan_slab_free+0x10a/0x190 [ 56.146348] kmem_cache_free+0x10d/0x4d0 [ 56.146861] rcu_core+0x8c8/0x2860 [ 56.147308] __do_softirq+0x1b7/0x7d4 [ 56.147791] [ 56.148011] Last potentially related work creation: [ 56.148607] kasan_save_stack+0x22/0x50 [ 56.149182] __kasan_record_aux_stack+0x8e/0xa0 [ 56.149763] __call_rcu_common.constprop.0+0x6a/0xb90 [ 56.150405] remove_vma+0x139/0x170 [ 56.150869] do_vmi_align_munmap+0xd4a/0x11f0 [ 56.151442] do_vmi_munmap+0x1f1/0x2b0 [ 56.151948] __vm_munmap+0x138/0x3a0 [ 56.152417] __x64_sys_munmap+0x59/0x80 [ 56.152919] do_syscall_64+0x3f/0x90 [ 56.153391] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.154039] [ 56.154252] The buggy address belongs to the object at ffff888019f661d0 [ 56.154252] which belongs to the cache vm_area_struct of size 168 [ 56.155765] The buggy address is located 88 bytes inside of [ 56.155765] freed 168-byte region [ffff888019f661d0, ffff888019f66278) [ 56.157194] [ 56.157408] The buggy address belongs to the physical page: [ 56.158077] page:00000000b6ac0647 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f66 [ 56.159203] memcg:ffff8880168c9301 [ 56.159634] flags: 0x100000000000200(slab|node=0|zone=1) [ 56.160288] page_type: 0xffffffff() [ 56.160744] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 56.161667] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880168c9301 [ 56.162591] page dumped because: kasan: bad access detected [ 56.163261] [ 56.163477] Memory state around the buggy address: [ 56.164109] ffff888019f66100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 56.165007] ffff888019f66180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 56.165894] >ffff888019f66200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 56.166782] ^ [ 56.167348] ffff888019f66280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 56.168224] ffff888019f66300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 56.169084] ================================================================== [ 56.170013] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 59.149504] BUG: Bad rss-counter state mm:00000000158a5840 type:MM_FILEPAGES val:33 [ 59.150162] BUG: Bad rss-counter state mm:00000000158a5840 type:MM_ANONPAGES val:22 [ 59.650481] BUG: Bad rss-counter state mm:000000002daad06f type:MM_FILEPAGES val:33 [ 59.652132] BUG: Bad rss-counter state mm:000000002daad06f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3063' (ECDSA) to the list of known hosts. 2023/06/20 20:57:00 fuzzer started 2023/06/20 20:57:00 dialing manager at localhost:36067 2023/06/20 20:57:00 checking machine... 2023/06/20 20:57:00 checking revisions... [ 60.354561] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:57:00 testing simple program... [ 60.405080] cgroup: Unknown subsys name 'net' [ 60.450262] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:57:00 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888019df75c0 RCX=0000000000000001 RDX=1ffff110033beecf RSI=ffffffff83636c06 RDI=ffff888019df75cc RBP=ffff888019df7678 RSP=ffff888019df74d8 R8 =0000000000000001 R9 =ffff888019df7538 R10=0000000000038001 R11=000000000009a995 R12=ffff888019df75c0 R13=0000000000000000 R14=ffff88801a410000 R15=0000000000000200 RIP=ffffffff813ad547 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 00007fdc304cf900 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=00007fdc30a84650 CR3=000000000edee000 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007ffeac60b638 CR3=0000000005482000 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=00007fbbc92695100000564b6aec7790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000