syzkaller login: [ 30.979021] BUG: Bad rss-counter state mm:000000005e2c9a00 type:MM_FILEPAGES val:33 [ 30.980450] BUG: Bad rss-counter state mm:000000005e2c9a00 type:MM_ANONPAGES val:22 [ 31.147174] ================================================================== [ 31.148095] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.149021] Read of size 8 at addr ffff88800c51f140 by task sshd/222 [ 31.149804] [ 31.150102] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.150961] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.151957] Call Trace: [ 31.152289] [ 31.152574] dump_stack_lvl+0x91/0xf0 [ 31.153062] print_report+0xcc/0x620 [ 31.153560] ? __virt_addr_valid+0x102/0x340 [ 31.154105] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.154713] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.155319] kasan_report+0xbe/0xf0 [ 31.155815] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.156436] vma_interval_tree_remove+0xc75/0xec0 [ 31.157026] vma_prepare+0xc54/0x11a0 [ 31.157505] __split_vma+0x5af/0x950 [ 31.157966] ? __pfx___split_vma+0x10/0x10 [ 31.158487] ? find_held_lock+0x2c/0x110 [ 31.158999] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.159556] ? lock_is_held_type+0x9f/0x120 [ 31.160121] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.160725] ? mtree_range_walk+0x632/0x900 [ 31.161274] ? mas_walk+0x5c7/0x7c0 [ 31.161755] do_vmi_munmap+0x1f1/0x2b0 [ 31.162244] mmap_region+0x1f9/0x2660 [ 31.162723] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.163234] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.163972] ? __pfx_lock_acquire+0x10/0x10 [ 31.164499] ? __pfx_mmap_region+0x10/0x10 [ 31.165023] ? security_mmap_addr+0x7d/0xa0 [ 31.165570] ? get_unmapped_area+0x1f5/0x3f0 [ 31.166107] do_mmap+0x854/0xf00 [ 31.166538] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.167028] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.167580] ksys_mmap_pgoff+0x3af/0x500 [ 31.168113] do_syscall_64+0x3f/0x90 [ 31.168590] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.169224] RIP: 0033:0x7f6c2aaafd82 [ 31.169685] 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 [ 31.171808] RSP: 002b:00007fff6256b098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.172693] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6c2aaafd82 [ 31.173537] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6c29ee9000 [ 31.174372] RBP: 00007f6c29ee9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.175196] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559c31496f70 [ 31.176065] R13: 00007fff6256b0b0 R14: 00007fff6256b0e0 R15: 00007fff6256b440 [ 31.176903] [ 31.177191] [ 31.177423] Allocated by task 215: [ 31.177844] kasan_save_stack+0x22/0x50 [ 31.178339] kasan_set_track+0x25/0x30 [ 31.178820] __kasan_slab_alloc+0x59/0x70 [ 31.179343] kmem_cache_alloc+0x16b/0x370 [ 31.179884] vm_area_dup+0x20/0x160 [ 31.180336] __split_vma+0x170/0x950 [ 31.180789] split_vma+0xc6/0x110 [ 31.181219] mprotect_fixup+0x8d2/0xb30 [ 31.181739] do_mprotect_pkey+0x87e/0xd40 [ 31.182260] __x64_sys_mprotect+0x78/0xc0 [ 31.182774] do_syscall_64+0x3f/0x90 [ 31.183245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.183910] [ 31.184126] Freed by task 204: [ 31.184515] kasan_save_stack+0x22/0x50 [ 31.185013] kasan_set_track+0x25/0x30 [ 31.185529] kasan_save_free_info+0x2b/0x50 [ 31.186052] __kasan_slab_free+0x10a/0x190 [ 31.186579] kmem_cache_free+0x10d/0x4d0 [ 31.187084] rcu_core+0x8c8/0x2860 [ 31.187523] __do_softirq+0x1b7/0x7d4 [ 31.188023] [ 31.188238] Last potentially related work creation: [ 31.188816] kasan_save_stack+0x22/0x50 [ 31.189316] __kasan_record_aux_stack+0x8e/0xa0 [ 31.189900] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.190559] remove_vma+0x139/0x170 [ 31.191016] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.191592] do_vmi_munmap+0x1f1/0x2b0 [ 31.192118] __vm_munmap+0x138/0x3a0 [ 31.192593] __x64_sys_munmap+0x59/0x80 [ 31.193089] do_syscall_64+0x3f/0x90 [ 31.193591] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.194244] [ 31.194465] Second to last potentially related work creation: [ 31.195160] kasan_save_stack+0x22/0x50 [ 31.195670] __kasan_record_aux_stack+0x8e/0xa0 [ 31.196286] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.196939] remove_vma+0x139/0x170 [ 31.197412] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.197984] do_vmi_munmap+0x1f1/0x2b0 [ 31.198479] mmap_region+0x1f9/0x2660 [ 31.198961] do_mmap+0x854/0xf00 [ 31.199406] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.199932] ksys_mmap_pgoff+0x3af/0x500 [ 31.200446] do_syscall_64+0x3f/0x90 [ 31.200929] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.201595] [ 31.201814] The buggy address belongs to the object at ffff88800c51f0e8 [ 31.201814] which belongs to the cache vm_area_struct of size 168 [ 31.203313] The buggy address is located 88 bytes inside of [ 31.203313] freed 168-byte region [ffff88800c51f0e8, ffff88800c51f190) [ 31.204799] [ 31.205019] The buggy address belongs to the physical page: [ 31.205718] page:000000003399233b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc51f [ 31.206822] memcg:ffff8880187fce01 [ 31.207258] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.207952] page_type: 0xffffffff() [ 31.208413] raw: 0100000000000200 ffff8880087a0c80 ffffea0000671480 dead000000000002 [ 31.209355] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880187fce01 [ 31.210295] page dumped because: kasan: bad access detected [ 31.210979] [ 31.211196] Memory state around the buggy address: [ 31.211820] ffff88800c51f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.212697] ffff88800c51f080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.213589] >ffff88800c51f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.214430] ^ [ 31.215052] ffff88800c51f180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.215937] ffff88800c51f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.216783] ================================================================== [ 31.217769] Disabling lock debugging due to kernel taint [ 33.815572] BUG: Bad rss-counter state mm:000000003e29a2d4 type:MM_FILEPAGES val:33 [ 33.816564] BUG: Bad rss-counter state mm:000000003e29a2d4 type:MM_ANONPAGES val:22 [ 34.261631] BUG: Bad rss-counter state mm:000000008b48bef0 type:MM_FILEPAGES val:33 [ 34.262535] BUG: Bad rss-counter state mm:000000008b48bef0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27176' (ECDSA) to the list of known hosts. 2023/06/20 23:00:28 fuzzer started 2023/06/20 23:00:28 dialing manager at localhost:36067 2023/06/20 23:00:28 checking machine... 2023/06/20 23:00:28 checking revisions... [ 34.979879] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:00:28 testing simple program... [ 35.028487] cgroup: Unknown subsys name 'net' [ 35.066994] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:00:28 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000073 RCX=ffffffff8189eee0 RDX=ffff88800d6751c0 RSI=0000000000000000 RDI=0000000000000001 RBP=0000000000000001 RSP=ffff88800d4af9a0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=0000000000000000 R13=ffff88800c12e468 R14=ffff88800d4afc80 R15=ffff88800d4afc58 RIP=ffffffff8189eef4 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 00007f1465eaf900 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=00007f14652b5780 CR3=000000000c6b0000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=ccaad812b640c54200000000000ae988 XMM05=f5f2aaa307881b250000000000133a70 XMM06=59d5b690e0af863b0000000000132908 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=ffff888008c04400 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=00007f659a1a60b0 CR3=000000000f07c000 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=30303a3332203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3133325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343736 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000