syzkaller login: [ 42.973088] BUG: Bad rss-counter state mm:00000000e2d70ecb type:MM_FILEPAGES val:33 [ 42.974517] BUG: Bad rss-counter state mm:00000000e2d70ecb type:MM_ANONPAGES val:22 [ 43.114005] ================================================================== [ 43.114805] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.115626] Read of size 8 at addr ffff888009884c20 by task sshd/219 [ 43.116316] [ 43.116558] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.117347] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.118201] Call Trace: [ 43.118472] [ 43.118731] dump_stack_lvl+0x91/0xf0 [ 43.119176] print_report+0xcc/0x620 [ 43.119587] ? __virt_addr_valid+0x102/0x340 [ 43.120098] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.120622] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.121192] kasan_report+0xbe/0xf0 [ 43.121595] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.122155] vma_interval_tree_remove+0xc75/0xec0 [ 43.122694] vma_prepare+0xc54/0x11a0 [ 43.123120] __split_vma+0x5af/0x950 [ 43.123545] ? __pfx___split_vma+0x10/0x10 [ 43.124020] ? find_held_lock+0x2c/0x110 [ 43.124485] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.125016] ? lock_is_held_type+0x9f/0x120 [ 43.125498] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.126041] ? mtree_range_walk+0x632/0x900 [ 43.126509] ? mas_walk+0x5c7/0x7c0 [ 43.126938] do_vmi_munmap+0x1f1/0x2b0 [ 43.127367] mmap_region+0x1f9/0x2660 [ 43.127801] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.128272] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.128940] ? __pfx_lock_acquire+0x10/0x10 [ 43.129425] ? __pfx_mmap_region+0x10/0x10 [ 43.129874] ? security_mmap_addr+0x7d/0xa0 [ 43.130400] ? get_unmapped_area+0x1f5/0x3f0 [ 43.130928] do_mmap+0x854/0xf00 [ 43.131349] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.131804] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.132297] ksys_mmap_pgoff+0x3af/0x500 [ 43.132743] do_syscall_64+0x3f/0x90 [ 43.133189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.133750] RIP: 0033:0x7f1ea6405d82 [ 43.134154] 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 [ 43.136008] RSP: 002b:00007fffa3df5cd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.136805] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1ea6405d82 [ 43.137731] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1ea583f000 [ 43.138652] RBP: 00007f1ea583f000 R08: 0000000000000009 R09: 0000000000001000 [ 43.139546] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c08451fec0 [ 43.140272] R13: 00007fffa3df5cf0 R14: 00007fffa3df5d20 R15: 00007fffa3df6080 [ 43.141021] [ 43.141268] [ 43.141448] Allocated by task 212: [ 43.141824] kasan_save_stack+0x22/0x50 [ 43.142271] kasan_set_track+0x25/0x30 [ 43.142705] __kasan_slab_alloc+0x59/0x70 [ 43.143169] kmem_cache_alloc+0x16b/0x370 [ 43.143602] vm_area_dup+0x20/0x160 [ 43.144013] __split_vma+0x170/0x950 [ 43.144410] split_vma+0xc6/0x110 [ 43.144803] mprotect_fixup+0x8d2/0xb30 [ 43.145280] do_mprotect_pkey+0x87e/0xd40 [ 43.145732] __x64_sys_mprotect+0x78/0xc0 [ 43.146219] do_syscall_64+0x3f/0x90 [ 43.146635] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.147234] [ 43.147424] Freed by task 203: [ 43.147769] kasan_save_stack+0x22/0x50 [ 43.148248] kasan_set_track+0x25/0x30 [ 43.148683] kasan_save_free_info+0x2b/0x50 [ 43.149174] __kasan_slab_free+0x10a/0x190 [ 43.149656] kmem_cache_free+0x10d/0x4d0 [ 43.150133] rcu_core+0x8c8/0x2860 [ 43.150545] __do_softirq+0x1b7/0x7d4 [ 43.150978] [ 43.151165] Last potentially related work creation: [ 43.151695] kasan_save_stack+0x22/0x50 [ 43.152156] __kasan_record_aux_stack+0x8e/0xa0 [ 43.152673] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.153255] remove_vma+0x139/0x170 [ 43.153668] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.154172] do_vmi_munmap+0x1f1/0x2b0 [ 43.154596] __vm_munmap+0x138/0x3a0 [ 43.155039] __x64_sys_munmap+0x59/0x80 [ 43.155474] do_syscall_64+0x3f/0x90 [ 43.155904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.156538] [ 43.156729] Second to last potentially related work creation: [ 43.157425] kasan_save_stack+0x22/0x50 [ 43.157873] __kasan_record_aux_stack+0x8e/0xa0 [ 43.158402] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.158973] remove_vma+0x139/0x170 [ 43.159382] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.159878] do_vmi_munmap+0x1f1/0x2b0 [ 43.160330] mmap_region+0x1f9/0x2660 [ 43.160747] do_mmap+0x854/0xf00 [ 43.161140] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.161575] ksys_mmap_pgoff+0x3af/0x500 [ 43.162036] do_syscall_64+0x3f/0x90 [ 43.162462] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.163035] [ 43.163220] The buggy address belongs to the object at ffff888009884bc8 [ 43.163220] which belongs to the cache vm_area_struct of size 168 [ 43.164523] The buggy address is located 88 bytes inside of [ 43.164523] freed 168-byte region [ffff888009884bc8, ffff888009884c70) [ 43.165800] [ 43.166011] The buggy address belongs to the physical page: [ 43.166590] page:00000000af7c1841 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9884 [ 43.167559] memcg:ffff88800a0dc901 [ 43.167961] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 43.168561] page_type: 0xffffffff() [ 43.168994] raw: 0100000000000200 ffff88800879fc80 ffffea000039f540 dead000000000007 [ 43.169789] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800a0dc901 [ 43.170600] page dumped because: kasan: bad access detected [ 43.171212] [ 43.171397] Memory state around the buggy address: [ 43.171896] ffff888009884b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.172664] ffff888009884b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 43.173471] >ffff888009884c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 43.174240] ^ [ 43.174719] ffff888009884c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 43.175484] ffff888009884d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 43.176246] ================================================================== [ 43.177146] Disabling lock debugging due to kernel taint [ 45.114172] BUG: Bad rss-counter state mm:00000000f0c67bab type:MM_FILEPAGES val:33 [ 45.115131] BUG: Bad rss-counter state mm:00000000f0c67bab type:MM_ANONPAGES val:22 [ 45.573599] BUG: Bad rss-counter state mm:00000000294f8f98 type:MM_FILEPAGES val:33 [ 45.574695] BUG: Bad rss-counter state mm:00000000294f8f98 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25424' (ECDSA) to the list of known hosts. 2023/06/19 21:34:52 fuzzer started 2023/06/19 21:34:52 dialing manager at localhost:44161 2023/06/19 21:34:52 checking machine... 2023/06/19 21:34:52 checking revisions... [ 46.305283] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:34:52 testing simple program... [ 46.348192] cgroup: Unknown subsys name 'net' [ 46.387773] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:34:48 Registers: info registers vcpu 0 RAX=fffffbfff0ba77db RBX=fffffbfff0ba77db RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88806ce09920 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652988 R15=ffff88801696dc00 RIP=ffffffff8180f004 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 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=00007f2aaa0a9020 CR3=00000000169d6000 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=34333a3132203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303734 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=dffffc0000000000 RBX=ffff88806cf09a98 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffff88801818fbd8 RDI=ffffffff8173f6f0 RBP=ffff88806cf09af0 RSP=ffff88806cf09a80 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b3eeb R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff88800c5b8000 R15=ffff88801a2beb80 RIP=ffffffff811303b2 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 00007fd067c14900 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=00007fd067bde008 CR3=000000000c544000 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