syzkaller login: [ 24.015406] BUG: Bad rss-counter state mm:000000004f094999 type:MM_FILEPAGES val:33 [ 24.017403] BUG: Bad rss-counter state mm:000000004f094999 type:MM_ANONPAGES val:22 [ 24.177165] ================================================================== [ 24.178039] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.178952] Read of size 8 at addr ffff88800d46ced8 by task sshd/219 [ 24.179701] [ 24.179926] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.180938] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.181906] Call Trace: [ 24.182220] [ 24.182500] dump_stack_lvl+0x91/0xf0 [ 24.183013] print_report+0xcc/0x620 [ 24.183488] ? __virt_addr_valid+0x102/0x340 [ 24.184048] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.184651] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.185263] kasan_report+0xbe/0xf0 [ 24.185731] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.186490] vma_interval_tree_remove+0xc75/0xec0 [ 24.187111] vma_prepare+0xc54/0x11a0 [ 24.187594] __split_vma+0x5af/0x950 [ 24.188074] ? __pfx___split_vma+0x10/0x10 [ 24.188634] ? find_held_lock+0x2c/0x110 [ 24.189159] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.189721] ? lock_is_held_type+0x9f/0x120 [ 24.190266] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.190875] ? mtree_range_walk+0x632/0x900 [ 24.191427] ? mas_walk+0x5c7/0x7c0 [ 24.191909] do_vmi_munmap+0x1f1/0x2b0 [ 24.192405] mmap_region+0x1f9/0x2660 [ 24.192888] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.193401] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.194113] ? __pfx_lock_acquire+0x10/0x10 [ 24.194650] ? __pfx_mmap_region+0x10/0x10 [ 24.195186] ? security_mmap_addr+0x7d/0xa0 [ 24.195737] ? get_unmapped_area+0x1f5/0x3f0 [ 24.196300] do_mmap+0x854/0xf00 [ 24.196744] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.197243] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.197810] ksys_mmap_pgoff+0x3af/0x500 [ 24.198322] do_syscall_64+0x3f/0x90 [ 24.198801] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.199447] RIP: 0033:0x7f136888ed82 [ 24.199923] 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 [ 24.202070] RSP: 002b:00007ffdcffc20f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.202987] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f136888ed82 [ 24.203881] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1367cc8000 [ 24.204730] RBP: 00007f1367cc8000 R08: 0000000000000009 R09: 0000000000001000 [ 24.205589] R10: 0000000000000812 R11: 0000000000000206 R12: 00005634e1da9d90 [ 24.206455] R13: 00007ffdcffc2110 R14: 00007ffdcffc2140 R15: 00007ffdcffc24a0 [ 24.207327] [ 24.207633] [ 24.207876] Allocated by task 212: [ 24.208309] kasan_save_stack+0x22/0x50 [ 24.208820] kasan_set_track+0x25/0x30 [ 24.209326] __kasan_slab_alloc+0x59/0x70 [ 24.209849] kmem_cache_alloc+0x16b/0x370 [ 24.210371] vm_area_dup+0x20/0x160 [ 24.210838] __split_vma+0x170/0x950 [ 24.211318] split_vma+0xc6/0x110 [ 24.211775] mprotect_fixup+0x8d2/0xb30 [ 24.212286] do_mprotect_pkey+0x87e/0xd40 [ 24.212806] __x64_sys_mprotect+0x78/0xc0 [ 24.213333] do_syscall_64+0x3f/0x90 [ 24.213810] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.214457] [ 24.214674] Freed by task 212: [ 24.215084] kasan_save_stack+0x22/0x50 [ 24.215592] kasan_set_track+0x25/0x30 [ 24.216107] kasan_save_free_info+0x2b/0x50 [ 24.216646] __kasan_slab_free+0x10a/0x190 [ 24.217187] kmem_cache_free+0x10d/0x4d0 [ 24.217702] rcu_core+0x8c8/0x2860 [ 24.218156] __do_softirq+0x1b7/0x7d4 [ 24.218636] [ 24.218853] Last potentially related work creation: [ 24.219463] kasan_save_stack+0x22/0x50 [ 24.219988] __kasan_record_aux_stack+0x8e/0xa0 [ 24.220563] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.221214] remove_vma+0x139/0x170 [ 24.221670] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.222227] do_vmi_munmap+0x1f1/0x2b0 [ 24.222721] __vm_munmap+0x138/0x3a0 [ 24.223194] __x64_sys_munmap+0x59/0x80 [ 24.223694] do_syscall_64+0x3f/0x90 [ 24.224206] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.224862] [ 24.225081] Second to last potentially related work creation: [ 24.225780] kasan_save_stack+0x22/0x50 [ 24.226289] __kasan_record_aux_stack+0x8e/0xa0 [ 24.226875] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.227519] remove_vma+0x139/0x170 [ 24.228006] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.228571] do_vmi_munmap+0x1f1/0x2b0 [ 24.229060] mmap_region+0x1f9/0x2660 [ 24.229545] do_mmap+0x854/0xf00 [ 24.229990] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.230483] ksys_mmap_pgoff+0x3af/0x500 [ 24.231000] do_syscall_64+0x3f/0x90 [ 24.231479] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.232141] [ 24.232357] The buggy address belongs to the object at ffff88800d46ce80 [ 24.232357] which belongs to the cache vm_area_struct of size 168 [ 24.233852] The buggy address is located 88 bytes inside of [ 24.233852] freed 168-byte region [ffff88800d46ce80, ffff88800d46cf28) [ 24.235283] [ 24.235498] The buggy address belongs to the physical page: [ 24.236200] page:00000000a0ea476c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd46c [ 24.237287] memcg:ffff88800e121d01 [ 24.237728] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.238436] page_type: 0xffffffff() [ 24.238895] raw: 0100000000000200 ffff88800879fc80 ffffea000062d1c0 dead000000000007 [ 24.239841] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e121d01 [ 24.240750] page dumped because: kasan: bad access detected [ 24.241418] [ 24.241634] Memory state around the buggy address: [ 24.242221] ffff88800d46cd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.243090] ffff88800d46ce00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 24.243955] >ffff88800d46ce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.244817] ^ [ 24.245582] ffff88800d46cf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 24.246446] ffff88800d46cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.247302] ================================================================== [ 24.248334] Disabling lock debugging due to kernel taint [ 26.292350] BUG: Bad rss-counter state mm:0000000049ec553d type:MM_FILEPAGES val:33 [ 26.293498] BUG: Bad rss-counter state mm:0000000049ec553d type:MM_ANONPAGES val:22 [ 26.808686] BUG: Bad rss-counter state mm:000000002dc492cd type:MM_FILEPAGES val:33 [ 26.809865] BUG: Bad rss-counter state mm:000000002dc492cd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4610' (ECDSA) to the list of known hosts. 2023/06/20 06:24:35 fuzzer started 2023/06/20 06:24:35 dialing manager at localhost:44161 2023/06/20 06:24:35 checking machine... 2023/06/20 06:24:35 checking revisions... [ 27.436644] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:24:36 testing simple program... [ 27.492690] cgroup: Unknown subsys name 'net' [ 27.571418] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:24:35 Registers: info registers vcpu 0 RAX=1ffff11002b5fd43 RBX=ffff888015afe9e8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888015afea18 RBP=ffff88800ea57e80 RSP=ffff888008d7fc98 R8 =0000000000000001 R9 =ffffed10011aff87 R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff88800ea5b400 R14=ffffffff8186b9c5 R15=ffff88800e8a2b00 RIP=ffffffff81846362 RFL=00000046 [---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=00007f81e59d2960 CR3=000000000b364000 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=7198b80036459982cb4cced2e0de756b XMM02=000000000011f628d59e07bde36eea69 XMM03=000000000011f750ec2efd57dc4c00df XMM04=b2e2ffc0d18d6edf00000000000ae988 XMM05=270aa260a956490b0000000000135710 XMM06=dfcdbad4f1609c370000000000134258 XMM07=fb795ef6d657705600000000001233f8 XMM08=2c67c8bc2e329bc3000000000011f750 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800fce1280 RBX=ffff888016b2d670 RCX=ffffffff84517253 RDX=1ffff11002d65ace RSI=ffff888008e2d1c0 RDI=ffff88800fce1280 RBP=ffff8880164ef7e8 RSP=ffff8880164ef6b0 R8 =0000000000000001 R9 =ffffed1002d65cb5 R10=ffff888016b2e5af R11=0000000000000000 R12=ffff88806cf39500 R13=ffff888016b2d1c0 R14=ffff888008e2d668 R15=ffff888008e2d1c0 RIP=ffffffff81144dec RFL=00000046 [---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 00007feefd673700 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=00007febe6c2f650 CR3=0000000009688000 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=34323a3630203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323331 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000