syzkaller login: [ 39.113128] BUG: Bad rss-counter state mm:000000009e358fb8 type:MM_FILEPAGES val:33 [ 39.114157] BUG: Bad rss-counter state mm:000000009e358fb8 type:MM_ANONPAGES val:22 [ 39.145904] ================================================================== [ 39.146746] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.147584] Read of size 8 at addr ffff88801669a228 by task sshd/225 [ 39.148276] [ 39.148445] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.149111] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.150015] Call Trace: [ 39.150263] <TASK> [ 39.150482] dump_stack_lvl+0x91/0xf0 [ 39.150863] print_report+0xcc/0x620 [ 39.151249] ? __virt_addr_valid+0x102/0x340 [ 39.151681] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.152160] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.152795] kasan_report+0xbe/0xf0 [ 39.153204] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.153688] vma_interval_tree_remove+0xc75/0xec0 [ 39.154159] vma_prepare+0xc54/0x11a0 [ 39.154669] __split_vma+0x5af/0x950 [ 39.155176] ? __pfx___split_vma+0x10/0x10 [ 39.155587] ? find_held_lock+0x2c/0x110 [ 39.156025] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.156530] ? lock_is_held_type+0x9f/0x120 [ 39.157039] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.157477] ? mtree_range_walk+0x632/0x900 [ 39.157889] ? mas_walk+0x5c7/0x7c0 [ 39.158230] do_vmi_munmap+0x1f1/0x2b0 [ 39.158517] mmap_region+0x1f9/0x2660 [ 39.158801] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.159104] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.159541] ? __pfx_lock_acquire+0x10/0x10 [ 39.159859] ? __pfx_mmap_region+0x10/0x10 [ 39.160170] ? security_mmap_addr+0x7d/0xa0 [ 39.160484] ? get_unmapped_area+0x1f5/0x3f0 [ 39.160815] do_mmap+0x854/0xf00 [ 39.161071] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.161357] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.161692] ksys_mmap_pgoff+0x3af/0x500 [ 39.161990] do_syscall_64+0x3f/0x90 [ 39.162275] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.162657] RIP: 0033:0x7fad520dad82 [ 39.162932] 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 [ 39.164204] RSP: 002b:00007ffed9bd12d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.164745] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fad520dad82 [ 39.165243] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fad51514000 [ 39.165745] RBP: 00007fad51514000 R08: 0000000000000009 R09: 0000000000001000 [ 39.166261] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b5572f7ec0 [ 39.166766] R13: 00007ffed9bd12f0 R14: 00007ffed9bd1320 R15: 00007ffed9bd1680 [ 39.167450] </TASK> [ 39.167830] [ 39.168102] Allocated by task 218: [ 39.168647] kasan_save_stack+0x22/0x50 [ 39.169317] kasan_set_track+0x25/0x30 [ 39.169952] __kasan_slab_alloc+0x59/0x70 [ 39.170617] kmem_cache_alloc+0x16b/0x370 [ 39.171310] vm_area_dup+0x20/0x160 [ 39.171897] __split_vma+0x170/0x950 [ 39.172488] split_vma+0xc6/0x110 [ 39.173048] mprotect_fixup+0x8d2/0xb30 [ 39.173701] do_mprotect_pkey+0x87e/0xd40 [ 39.174375] __x64_sys_mprotect+0x78/0xc0 [ 39.175051] do_syscall_64+0x3f/0x90 [ 39.175825] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.176662] [ 39.176937] Freed by task 218: [ 39.177426] kasan_save_stack+0x22/0x50 [ 39.178078] kasan_set_track+0x25/0x30 [ 39.178716] kasan_save_free_info+0x2b/0x50 [ 39.179427] __kasan_slab_free+0x10a/0x190 [ 39.180087] kmem_cache_free+0x10d/0x4d0 [ 39.180607] rcu_core+0x8c8/0x2860 [ 39.181065] __do_softirq+0x1b7/0x7d4 [ 39.181557] [ 39.181777] Last potentially related work creation: [ 39.182381] kasan_save_stack+0x22/0x50 [ 39.182894] __kasan_record_aux_stack+0x8e/0xa0 [ 39.183498] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.184156] remove_vma+0x139/0x170 [ 39.184621] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.185197] do_vmi_munmap+0x1f1/0x2b0 [ 39.185693] __vm_munmap+0x138/0x3a0 [ 39.186176] __x64_sys_munmap+0x59/0x80 [ 39.186688] do_syscall_64+0x3f/0x90 [ 39.187190] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.187857] [ 39.188086] The buggy address belongs to the object at ffff88801669a1d0 [ 39.188086] which belongs to the cache vm_area_struct of size 168 [ 39.189613] The buggy address is located 88 bytes inside of [ 39.189613] freed 168-byte region [ffff88801669a1d0, ffff88801669a278) [ 39.191073] [ 39.191313] The buggy address belongs to the physical page: [ 39.191995] page:000000003b95a6b5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1669a [ 39.193118] memcg:ffff888019f3b301 [ 39.193562] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.194226] page_type: 0xffffffff() [ 39.194694] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.195653] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f3b301 [ 39.196588] page dumped because: kasan: bad access detected [ 39.197271] [ 39.197492] Memory state around the buggy address: [ 39.198094] ffff88801669a100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.198976] ffff88801669a180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 39.199883] >ffff88801669a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.200766] ^ [ 39.201338] ffff88801669a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.202218] ffff88801669a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.203094] ================================================================== [ 39.204145] Disabling lock debugging due to kernel taint [ 41.140280] BUG: Bad rss-counter state mm:000000005978c1a0 type:MM_FILEPAGES val:33 [ 41.141559] BUG: Bad rss-counter state mm:000000005978c1a0 type:MM_ANONPAGES val:22 [ 41.614895] BUG: Bad rss-counter state mm:0000000021395878 type:MM_FILEPAGES val:33 [ 41.615913] BUG: Bad rss-counter state mm:0000000021395878 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51554' (ECDSA) to the list of known hosts. 2023/06/20 17:39:43 fuzzer started 2023/06/20 17:39:43 dialing manager at localhost:36067 2023/06/20 17:39:43 checking machine... 2023/06/20 17:39:43 checking revisions... [ 42.326555] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:39:43 testing simple program... [ 42.377689] cgroup: Unknown subsys name 'net' [ 42.415390] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:39:42 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801a0cedfb RCX=1ffff11003419daa RDX=0000000000000005 RSI=ffff888015e0be4d RDI=ffff88801a0cedec RBP=0000000000000000 RSP=ffff888016d8f820 R8 =0000000000000001 R9 =ffff88801a0cedec R10=ffff88801a0ceda3 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88801a0cedfc R14=ffff88801a0cedec R15=ffff88801a0ced10 RIP=ffffffff844d8b6b RFL=00000206 [-----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 00007f8ba5529700 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=00007f675562cb10 CR3=0000000016868000 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=2032343a39333a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3433 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3433325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a39333a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff110028b7e85 RCX=0000000000000002 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff8880145bf418 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000046 R11=00000d4500000d45 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8f0e RFL=00000256 [---ZAP-] 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 00007fdd15935900 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=00007ffe31104000 CR3=000000001a172000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000