syzkaller login: [ 30.967441] BUG: Bad rss-counter state mm:000000005655e3ad type:MM_FILEPAGES val:33 [ 30.968744] BUG: Bad rss-counter state mm:000000005655e3ad type:MM_ANONPAGES val:22 [ 31.134671] ================================================================== [ 31.135640] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.136631] Read of size 8 at addr ffff888016a2cdf0 by task sshd/220 [ 31.137622] [ 31.137859] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.138764] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.139803] Call Trace: [ 31.140143] [ 31.140442] dump_stack_lvl+0x91/0xf0 [ 31.140958] print_report+0xcc/0x620 [ 31.141479] ? __virt_addr_valid+0x102/0x340 [ 31.142064] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.142719] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.143375] kasan_report+0xbe/0xf0 [ 31.143894] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.144570] vma_interval_tree_remove+0xc75/0xec0 [ 31.145346] vma_prepare+0xc54/0x11a0 [ 31.145946] __split_vma+0x5af/0x950 [ 31.146493] ? __pfx___split_vma+0x10/0x10 [ 31.147094] ? find_held_lock+0x2c/0x110 [ 31.147698] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.148344] ? lock_is_held_type+0x9f/0x120 [ 31.148968] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.149662] ? mtree_range_walk+0x632/0x900 [ 31.150181] ? mas_walk+0x5c7/0x7c0 [ 31.150629] do_vmi_munmap+0x1f1/0x2b0 [ 31.151092] mmap_region+0x1f9/0x2660 [ 31.151552] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.152037] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.152707] ? __pfx_lock_acquire+0x10/0x10 [ 31.153215] ? __pfx_mmap_region+0x10/0x10 [ 31.153721] ? security_mmap_addr+0x7d/0xa0 [ 31.154215] ? get_unmapped_area+0x1f5/0x3f0 [ 31.154731] do_mmap+0x854/0xf00 [ 31.155144] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.155609] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.156139] ksys_mmap_pgoff+0x3af/0x500 [ 31.156614] do_syscall_64+0x3f/0x90 [ 31.157062] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.157688] RIP: 0033:0x7f7182e39d82 [ 31.158136] 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 [ 31.160167] RSP: 002b:00007ffdcd4f52c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.161054] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7182e39d82 [ 31.161892] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7182273000 [ 31.162723] RBP: 00007f7182273000 R08: 0000000000000009 R09: 0000000000001000 [ 31.163536] R10: 0000000000000812 R11: 0000000000000206 R12: 00005642330d5ec0 [ 31.164353] R13: 00007ffdcd4f52e0 R14: 00007ffdcd4f5310 R15: 00007ffdcd4f5670 [ 31.165192] [ 31.165479] [ 31.165686] Allocated by task 213: [ 31.166101] kasan_save_stack+0x22/0x50 [ 31.166587] kasan_set_track+0x25/0x30 [ 31.167066] __kasan_slab_alloc+0x59/0x70 [ 31.167579] kmem_cache_alloc+0x16b/0x370 [ 31.168078] vm_area_dup+0x20/0x160 [ 31.168523] __split_vma+0x170/0x950 [ 31.168971] split_vma+0xc6/0x110 [ 31.169420] mprotect_fixup+0x8d2/0xb30 [ 31.169903] do_mprotect_pkey+0x87e/0xd40 [ 31.170414] __x64_sys_mprotect+0x78/0xc0 [ 31.170916] do_syscall_64+0x3f/0x90 [ 31.171380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.172003] [ 31.172210] Freed by task 213: [ 31.172595] kasan_save_stack+0x22/0x50 [ 31.173089] kasan_set_track+0x25/0x30 [ 31.173583] kasan_save_free_info+0x2b/0x50 [ 31.174097] __kasan_slab_free+0x10a/0x190 [ 31.174624] kmem_cache_free+0x10d/0x4d0 [ 31.175114] rcu_core+0x8c8/0x2860 [ 31.175550] __do_softirq+0x1b7/0x7d4 [ 31.176016] [ 31.176226] Last potentially related work creation: [ 31.176793] kasan_save_stack+0x22/0x50 [ 31.177285] __kasan_record_aux_stack+0x8e/0xa0 [ 31.177839] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.178467] remove_vma+0x139/0x170 [ 31.178898] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.179428] do_vmi_munmap+0x1f1/0x2b0 [ 31.179901] __vm_munmap+0x138/0x3a0 [ 31.180372] __x64_sys_munmap+0x59/0x80 [ 31.180853] do_syscall_64+0x3f/0x90 [ 31.181333] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.181946] [ 31.182159] The buggy address belongs to the object at ffff888016a2cd98 [ 31.182159] which belongs to the cache vm_area_struct of size 168 [ 31.183573] The buggy address is located 88 bytes inside of [ 31.183573] freed 168-byte region [ffff888016a2cd98, ffff888016a2ce40) [ 31.184945] [ 31.185154] The buggy address belongs to the physical page: [ 31.185792] page:000000003e055635 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a2c [ 31.186850] memcg:ffff88801475c001 [ 31.187271] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.187894] page_type: 0xffffffff() [ 31.188331] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.189243] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801475c001 [ 31.190115] page dumped because: kasan: bad access detected [ 31.190758] [ 31.190965] Memory state around the buggy address: [ 31.191527] ffff888016a2cc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.192346] ffff888016a2cd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.193182] >ffff888016a2cd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.194027] ^ [ 31.194808] ffff888016a2ce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.195639] ffff888016a2ce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.196463] ================================================================== [ 31.197567] Disabling lock debugging due to kernel taint [ 33.809399] BUG: Bad rss-counter state mm:0000000051f9c1d3 type:MM_FILEPAGES val:33 [ 33.810478] BUG: Bad rss-counter state mm:0000000051f9c1d3 type:MM_ANONPAGES val:22 [ 34.234817] BUG: Bad rss-counter state mm:000000006a67bf2a type:MM_FILEPAGES val:33 [ 34.236074] BUG: Bad rss-counter state mm:000000006a67bf2a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1820' (ECDSA) to the list of known hosts. 2023/06/19 16:23:43 fuzzer started 2023/06/19 16:23:43 dialing manager at localhost:44161 2023/06/19 16:23:43 checking machine... 2023/06/19 16:23:43 checking revisions... [ 34.877981] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:23:43 testing simple program... [ 34.929499] cgroup: Unknown subsys name 'net' [ 34.992421] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:23:41 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f7d4f354000 CR3=0000000008ed4000 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=2033343a33323a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a33323a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888009c28001 RBX=ffff888009c279d8 RCX=0000000000000001 RDX=ffff888009c27f01 RSI=ffff888009c27f40 RDI=ffff888009c279e8 RBP=ffff888009c27f40 RSP=ffff888009c27930 R8 =0000000000000001 R9 =ffff888009c27a18 R10=0000000000038001 R11=00000000000b523e R12=0000000000000008 R13=ffff888009c20000 R14=ffff888009c27f40 R15=ffff888009c279d8 RIP=ffffffff811304c9 RFL=00000202 [-------] 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 00007fd473b5f900 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=00007fd473b3e020 CR3=0000000009740000 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