syzkaller login: [ 26.964896] BUG: Bad rss-counter state mm:000000002c0c87d0 type:MM_FILEPAGES val:33 [ 26.966053] BUG: Bad rss-counter state mm:000000002c0c87d0 type:MM_ANONPAGES val:22 [ 27.120243] ================================================================== [ 27.121179] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.122120] Read of size 8 at addr ffff8880165aa6b0 by task sshd/219 [ 27.122901] [ 27.123124] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.124160] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.125149] Call Trace: [ 27.125469] [ 27.125753] dump_stack_lvl+0x91/0xf0 [ 27.126267] print_report+0xcc/0x620 [ 27.126745] ? __virt_addr_valid+0x102/0x340 [ 27.127306] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.127931] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.128544] kasan_report+0xbe/0xf0 [ 27.129029] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.129653] vma_interval_tree_remove+0xc75/0xec0 [ 27.130263] vma_prepare+0xc54/0x11a0 [ 27.130740] __split_vma+0x5af/0x950 [ 27.131218] ? __pfx___split_vma+0x10/0x10 [ 27.131771] ? find_held_lock+0x2c/0x110 [ 27.132306] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.132878] ? lock_is_held_type+0x9f/0x120 [ 27.133412] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.134030] ? mtree_range_walk+0x632/0x900 [ 27.134583] ? mas_walk+0x5c7/0x7c0 [ 27.135060] do_vmi_munmap+0x1f1/0x2b0 [ 27.135576] mmap_region+0x1f9/0x2660 [ 27.136057] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.136571] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.137298] ? __pfx_lock_acquire+0x10/0x10 [ 27.137831] ? __pfx_mmap_region+0x10/0x10 [ 27.138368] ? security_mmap_addr+0x7d/0xa0 [ 27.138905] ? get_unmapped_area+0x1f5/0x3f0 [ 27.139483] do_mmap+0x854/0xf00 [ 27.139945] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.140455] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.141016] ksys_mmap_pgoff+0x3af/0x500 [ 27.141530] do_syscall_64+0x3f/0x90 [ 27.142014] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.142676] RIP: 0033:0x7f26adb4bd82 [ 27.143137] 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 [ 27.145318] RSP: 002b:00007ffe3e440798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.146248] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f26adb4bd82 [ 27.147097] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f26acf85000 [ 27.147955] RBP: 00007f26acf85000 R08: 0000000000000009 R09: 0000000000001000 [ 27.148813] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d89095bec0 [ 27.149667] R13: 00007ffe3e4407b0 R14: 00007ffe3e4407e0 R15: 00007ffe3e440b40 [ 27.150527] [ 27.150826] [ 27.151045] Allocated by task 212: [ 27.151491] kasan_save_stack+0x22/0x50 [ 27.151996] kasan_set_track+0x25/0x30 [ 27.152492] __kasan_slab_alloc+0x59/0x70 [ 27.153022] kmem_cache_alloc+0x16b/0x370 [ 27.153538] vm_area_dup+0x20/0x160 [ 27.153996] __split_vma+0x170/0x950 [ 27.154467] split_vma+0xc6/0x110 [ 27.154910] mprotect_fixup+0x8d2/0xb30 [ 27.155419] do_mprotect_pkey+0x87e/0xd40 [ 27.155952] __x64_sys_mprotect+0x78/0xc0 [ 27.156475] do_syscall_64+0x3f/0x90 [ 27.156950] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.157586] [ 27.157805] Freed by task 212: [ 27.158199] kasan_save_stack+0x22/0x50 [ 27.158713] kasan_set_track+0x25/0x30 [ 27.159221] kasan_save_free_info+0x2b/0x50 [ 27.159776] __kasan_slab_free+0x10a/0x190 [ 27.160314] kmem_cache_free+0x10d/0x4d0 [ 27.160823] rcu_core+0x8c8/0x2860 [ 27.161274] __do_softirq+0x1b7/0x7d4 [ 27.161752] [ 27.161969] Last potentially related work creation: [ 27.162563] kasan_save_stack+0x22/0x50 [ 27.163067] __kasan_record_aux_stack+0x8e/0xa0 [ 27.163651] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.164297] remove_vma+0x139/0x170 [ 27.164752] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.165390] do_vmi_munmap+0x1f1/0x2b0 [ 27.165884] __vm_munmap+0x138/0x3a0 [ 27.166351] __x64_sys_munmap+0x59/0x80 [ 27.166858] do_syscall_64+0x3f/0x90 [ 27.167353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.168000] [ 27.168219] The buggy address belongs to the object at ffff8880165aa658 [ 27.168219] which belongs to the cache vm_area_struct of size 168 [ 27.169701] The buggy address is located 88 bytes inside of [ 27.169701] freed 168-byte region [ffff8880165aa658, ffff8880165aa700) [ 27.171129] [ 27.171359] The buggy address belongs to the physical page: [ 27.172022] page:000000006b5b90f5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x165aa [ 27.173116] memcg:ffff888014645001 [ 27.173546] flags: 0x100000000000200(slab|node=0|zone=1) [ 27.174196] page_type: 0xffffffff() [ 27.174644] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 27.175572] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014645001 [ 27.176490] page dumped because: kasan: bad access detected [ 27.177152] [ 27.177370] Memory state around the buggy address: [ 27.177958] ffff8880165aa580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 27.178828] ffff8880165aa600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 27.179706] >ffff8880165aa680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.180572] ^ [ 27.181153] ffff8880165aa700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 27.182012] ffff8880165aa780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 27.182871] ================================================================== [ 27.184000] Disabling lock debugging due to kernel taint [ 30.073858] BUG: Bad rss-counter state mm:00000000b724623a type:MM_FILEPAGES val:33 [ 30.074801] BUG: Bad rss-counter state mm:00000000b724623a type:MM_ANONPAGES val:22 [ 30.543872] BUG: Bad rss-counter state mm:00000000d94b5bc8 type:MM_FILEPAGES val:33 [ 30.545418] BUG: Bad rss-counter state mm:00000000d94b5bc8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54643' (ECDSA) to the list of known hosts. 2023/06/19 20:16:10 fuzzer started 2023/06/19 20:16:11 dialing manager at localhost:44161 2023/06/19 20:16:11 checking machine... 2023/06/19 20:16:11 checking revisions... [ 31.302327] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:16:11 testing simple program... [ 31.356304] cgroup: Unknown subsys name 'net' [ 31.397420] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:16:07 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000001 RCX=ffffffff81132ffd RDX=000000000000132f RSI=000000000000132f RDI=ffffffff864ec87c RBP=ffff8880167df8b0 RSP=ffff8880167df798 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff8880167df8b8 R13=ffff8880167df8a0 R14=ffff8880167df899 R15=ffff8880167df858 RIP=ffffffff811307c2 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=00007f570c55f330 CR3=0000000015d3e000 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=756e696c2d34365f3638782f62696c2f XMM01=6f732e6474737a62696c2f756e672d78 XMM02=00312e6f732e6474737a62696c2f756e XMM03=672d78756e696c2d34365f3638782f62 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff813ad6d0 RBX=ffffffff813ad420 RCX=ffff88806cf09af0 RDX=1ffff1100d9e1355 RSI=ffffffff813ad6d0 RDI=ffff88806cf09b18 RBP=ffff88806cf09ae8 RSP=ffff88806cf09a48 R8 =0000000000000001 R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806cf09b18 R13=0000000000000000 R14=ffff888014740000 R15=ffff88800d8ba400 RIP=ffffffff813ad424 RFL=00000282 [--S----] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5dd2240900 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=000055ad2782814c CR3=0000000016dea000 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=6720646572637465733a4d41503d706f 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