syzkaller login: [ 41.961659] BUG: Bad rss-counter state mm:000000002acd200c type:MM_FILEPAGES val:33 [ 41.962893] BUG: Bad rss-counter state mm:000000002acd200c type:MM_ANONPAGES val:22 [ 42.132827] ================================================================== [ 42.133957] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.135184] Read of size 8 at addr ffff88800deb1ed8 by task sshd/220 [ 42.136168] [ 42.136433] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.137499] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.138497] Call Trace: [ 42.138816] [ 42.139100] dump_stack_lvl+0x91/0xf0 [ 42.139587] print_report+0xcc/0x620 [ 42.140070] ? __virt_addr_valid+0x102/0x340 [ 42.140623] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.141247] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.141860] kasan_report+0xbe/0xf0 [ 42.142339] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.142966] vma_interval_tree_remove+0xc75/0xec0 [ 42.143571] vma_prepare+0xc54/0x11a0 [ 42.144053] __split_vma+0x5af/0x950 [ 42.144532] ? __pfx___split_vma+0x10/0x10 [ 42.145060] ? find_held_lock+0x2c/0x110 [ 42.145576] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.146136] ? lock_is_held_type+0x9f/0x120 [ 42.146693] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.147295] ? mtree_range_walk+0x632/0x900 [ 42.147838] ? mas_walk+0x5c7/0x7c0 [ 42.148315] do_vmi_munmap+0x1f1/0x2b0 [ 42.148802] mmap_region+0x1f9/0x2660 [ 42.149278] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.149789] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.150511] ? __pfx_lock_acquire+0x10/0x10 [ 42.151043] ? __pfx_mmap_region+0x10/0x10 [ 42.151576] ? security_mmap_addr+0x7d/0xa0 [ 42.152104] ? get_unmapped_area+0x1f5/0x3f0 [ 42.152651] do_mmap+0x854/0xf00 [ 42.153089] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.153582] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.154141] ksys_mmap_pgoff+0x3af/0x500 [ 42.154655] do_syscall_64+0x3f/0x90 [ 42.155131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.155774] RIP: 0033:0x7f8907beed82 [ 42.156230] 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 [ 42.158382] RSP: 002b:00007ffe48750858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.159280] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8907beed82 [ 42.160124] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8907028000 [ 42.160969] RBP: 00007f8907028000 R08: 0000000000000009 R09: 0000000000001000 [ 42.161813] R10: 0000000000000812 R11: 0000000000000206 R12: 000056218f247f60 [ 42.162684] R13: 00007ffe48750870 R14: 00007ffe487508a0 R15: 00007ffe48750c00 [ 42.163537] [ 42.163830] [ 42.164044] Allocated by task 213: [ 42.164469] kasan_save_stack+0x22/0x50 [ 42.164974] kasan_set_track+0x25/0x30 [ 42.165466] __kasan_slab_alloc+0x59/0x70 [ 42.165989] kmem_cache_alloc+0x16b/0x370 [ 42.166523] vm_area_dup+0x20/0x160 [ 42.166973] __split_vma+0x170/0x950 [ 42.167434] split_vma+0xc6/0x110 [ 42.167875] mprotect_fixup+0x8d2/0xb30 [ 42.168373] do_mprotect_pkey+0x87e/0xd40 [ 42.168942] __x64_sys_mprotect+0x78/0xc0 [ 42.169571] do_syscall_64+0x3f/0x90 [ 42.170144] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.170923] [ 42.171183] Freed by task 213: [ 42.171653] kasan_save_stack+0x22/0x50 [ 42.172250] kasan_set_track+0x25/0x30 [ 42.172842] kasan_save_free_info+0x2b/0x50 [ 42.173482] __kasan_slab_free+0x10a/0x190 [ 42.174124] kmem_cache_free+0x10d/0x4d0 [ 42.174748] rcu_core+0x8c8/0x2860 [ 42.175279] __do_softirq+0x1b7/0x7d4 [ 42.175852] [ 42.176113] Last potentially related work creation: [ 42.176824] kasan_save_stack+0x22/0x50 [ 42.177427] __kasan_record_aux_stack+0x8e/0xa0 [ 42.178119] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.178947] remove_vma+0x139/0x170 [ 42.179493] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.180174] do_vmi_munmap+0x1f1/0x2b0 [ 42.180761] __vm_munmap+0x138/0x3a0 [ 42.181325] __x64_sys_munmap+0x59/0x80 [ 42.181929] do_syscall_64+0x3f/0x90 [ 42.182518] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.183297] [ 42.183560] The buggy address belongs to the object at ffff88800deb1e80 [ 42.183560] which belongs to the cache vm_area_struct of size 168 [ 42.185338] The buggy address is located 88 bytes inside of [ 42.185338] freed 168-byte region [ffff88800deb1e80, ffff88800deb1f28) [ 42.187031] [ 42.187294] The buggy address belongs to the physical page: [ 42.188094] page:00000000f204280a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdeb1 [ 42.189413] memcg:ffff88800d6e7101 [ 42.189933] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.190745] page_type: 0xffffffff() [ 42.191291] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 42.192404] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d6e7101 [ 42.193473] page dumped because: kasan: bad access detected [ 42.194255] [ 42.194514] Memory state around the buggy address: [ 42.195195] ffff88800deb1d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.196212] ffff88800deb1e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 42.197209] >ffff88800deb1e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.198208] ^ [ 42.199081] ffff88800deb1f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 42.200086] ffff88800deb1f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 42.201088] ================================================================== [ 42.202658] Disabling lock debugging due to kernel taint [ 44.381788] BUG: Bad rss-counter state mm:00000000c6934dcb type:MM_FILEPAGES val:33 [ 44.382740] BUG: Bad rss-counter state mm:00000000c6934dcb type:MM_ANONPAGES val:22 [ 44.923373] BUG: Bad rss-counter state mm:000000009e4108b4 type:MM_FILEPAGES val:33 [ 44.924556] BUG: Bad rss-counter state mm:000000009e4108b4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41748' (ECDSA) to the list of known hosts. 2023/06/19 18:43:54 fuzzer started 2023/06/19 18:43:54 dialing manager at localhost:44161 2023/06/19 18:43:54 checking machine... 2023/06/19 18:43:54 checking revisions... [ 45.590685] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:43:54 testing simple program... [ 45.634963] cgroup: Unknown subsys name 'net' [ 45.672059] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:43:42 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff8162f8c0 RDX=ffff8880102f9b40 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000001 RSP=ffff88800f627b40 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=7962206d65687420 R12=ffffea00006e6c00 R13=ffff88800f627c00 R14=ffff88800f627e00 R15=dffffc0000000000 RIP=ffffffff814c07eb 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 00007f834b582900 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=00007ffd3e669000 CR3=000000001cd9c000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=ffffffff864bb001 RDX=ffff888008e27e78 RSI=0000000000000000 RDI=ffff88806cf09a50 RBP=ffff88806cf09ae8 RSP=ffff88806cf09a48 R8 =ffffffff864bb032 R9 =ffff88806cf09a90 R10=0000000000038001 R11=00000000000b6cb2 R12=ffff88806cf09b18 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff8880099de900 RIP=ffffffff81130340 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 =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=00007f22bce54000 CR3=0000000017820000 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=2033353a33343a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a33343a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000