syzkaller login: [ 36.015509] BUG: Bad rss-counter state mm:00000000a956a490 type:MM_FILEPAGES val:33 [ 36.016289] BUG: Bad rss-counter state mm:00000000a956a490 type:MM_ANONPAGES val:22 [ 36.133532] ================================================================== [ 36.134182] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.134790] Read of size 8 at addr ffff8880103663f8 by task sshd/220 [ 36.135311] [ 36.135467] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.136156] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.136889] Call Trace: [ 36.137113] [ 36.137308] dump_stack_lvl+0x91/0xf0 [ 36.137647] print_report+0xcc/0x620 [ 36.138138] ? __virt_addr_valid+0x102/0x340 [ 36.138527] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.138971] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.139383] kasan_report+0xbe/0xf0 [ 36.139733] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.140163] vma_interval_tree_remove+0xc75/0xec0 [ 36.140586] vma_prepare+0xc54/0x11a0 [ 36.140900] __split_vma+0x5af/0x950 [ 36.141211] ? __pfx___split_vma+0x10/0x10 [ 36.141568] ? find_held_lock+0x2c/0x110 [ 36.141958] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.142343] ? lock_is_held_type+0x9f/0x120 [ 36.142721] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.143143] ? mtree_range_walk+0x632/0x900 [ 36.143510] ? mas_walk+0x5c7/0x7c0 [ 36.143884] do_vmi_munmap+0x1f1/0x2b0 [ 36.144229] mmap_region+0x1f9/0x2660 [ 36.144557] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.144892] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.145381] ? __pfx_lock_acquire+0x10/0x10 [ 36.145762] ? __pfx_mmap_region+0x10/0x10 [ 36.146133] ? security_mmap_addr+0x7d/0xa0 [ 36.146479] ? get_unmapped_area+0x1f5/0x3f0 [ 36.146837] do_mmap+0x854/0xf00 [ 36.147129] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.147471] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.147896] ksys_mmap_pgoff+0x3af/0x500 [ 36.148226] do_syscall_64+0x3f/0x90 [ 36.148548] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.149001] RIP: 0033:0x7f82f5065d82 [ 36.149310] 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 [ 36.150738] RSP: 002b:00007fff8a89cf28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.151344] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f82f5065d82 [ 36.151956] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f82f449f000 [ 36.152527] RBP: 00007f82f449f000 R08: 0000000000000009 R09: 0000000000001000 [ 36.153092] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558c08839b20 [ 36.153669] R13: 00007fff8a89cf40 R14: 00007fff8a89cf70 R15: 00007fff8a89d2d0 [ 36.154263] [ 36.154466] [ 36.154608] Allocated by task 213: [ 36.154901] kasan_save_stack+0x22/0x50 [ 36.155238] kasan_set_track+0x25/0x30 [ 36.155568] __kasan_slab_alloc+0x59/0x70 [ 36.155950] kmem_cache_alloc+0x16b/0x370 [ 36.156293] vm_area_dup+0x20/0x160 [ 36.156594] __split_vma+0x170/0x950 [ 36.156934] split_vma+0xc6/0x110 [ 36.157227] mprotect_fixup+0x8d2/0xb30 [ 36.157552] do_mprotect_pkey+0x87e/0xd40 [ 36.157933] __x64_sys_mprotect+0x78/0xc0 [ 36.158296] do_syscall_64+0x3f/0x90 [ 36.158641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.159086] [ 36.159237] Freed by task 13: [ 36.159503] kasan_save_stack+0x22/0x50 [ 36.159893] kasan_set_track+0x25/0x30 [ 36.160230] kasan_save_free_info+0x2b/0x50 [ 36.160603] __kasan_slab_free+0x10a/0x190 [ 36.160993] kmem_cache_free+0x10d/0x4d0 [ 36.161326] rcu_core+0x8c8/0x2860 [ 36.161623] __do_softirq+0x1b7/0x7d4 [ 36.161946] [ 36.162091] Last potentially related work creation: [ 36.162495] kasan_save_stack+0x22/0x50 [ 36.162869] __kasan_record_aux_stack+0x8e/0xa0 [ 36.163259] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.163699] remove_vma+0x139/0x170 [ 36.164066] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.164450] do_vmi_munmap+0x1f1/0x2b0 [ 36.164773] __vm_munmap+0x138/0x3a0 [ 36.165077] __x64_sys_munmap+0x59/0x80 [ 36.165409] do_syscall_64+0x3f/0x90 [ 36.165739] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.166177] [ 36.166325] The buggy address belongs to the object at ffff8880103663a0 [ 36.166325] which belongs to the cache vm_area_struct of size 168 [ 36.167321] The buggy address is located 88 bytes inside of [ 36.167321] freed 168-byte region [ffff8880103663a0, ffff888010366448) [ 36.168310] [ 36.168453] The buggy address belongs to the physical page: [ 36.168907] page:00000000f1f324c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10366 [ 36.169647] memcg:ffff8880191d0f01 [ 36.169950] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.170393] page_type: 0xffffffff() [ 36.170707] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 36.171323] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880191d0f01 [ 36.171950] page dumped because: kasan: bad access detected [ 36.172409] [ 36.172556] Memory state around the buggy address: [ 36.172950] ffff888010366280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 36.173526] ffff888010366300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 36.174126] >ffff888010366380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 36.174672] ^ [ 36.175227] ffff888010366400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 36.175846] ffff888010366480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.176431] ================================================================== [ 36.177154] Disabling lock debugging due to kernel taint [ 37.612403] BUG: Bad rss-counter state mm:00000000c6f6f30d type:MM_FILEPAGES val:33 [ 37.613107] BUG: Bad rss-counter state mm:00000000c6f6f30d type:MM_ANONPAGES val:22 [ 37.976240] BUG: Bad rss-counter state mm:000000002b869a2b type:MM_FILEPAGES val:33 [ 37.976925] BUG: Bad rss-counter state mm:000000002b869a2b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60826' (ECDSA) to the list of known hosts. 2023/06/21 08:56:46 fuzzer started 2023/06/21 08:56:46 dialing manager at localhost:36067 2023/06/21 08:56:46 checking machine... 2023/06/21 08:56:46 checking revisions... [ 38.564306] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:56:46 testing simple program... [ 38.596926] cgroup: Unknown subsys name 'net' [ 38.643377] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:56:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888019d6d480 RCX=ffff888019d6d000 RDX=0000000000000080 RSI=ffff888019d6d390 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff888008d9fca0 R8 =0000000000000130 R9 =0000000000000000 R10=0000000000000008 R11=0000000000000128 R12=ffff88800844f780 R13=ffffea000066fe40 R14=ffffffff813782f8 R15=ffff888019bf9c38 RIP=ffffffff8180eff0 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 =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=00007ffcb0329000 CR3=000000000fcea000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007fc23d80b200 CR3=00000000199e2000 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=2036343a36353a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a36353a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000