syzkaller login: [ 31.973463] BUG: Bad rss-counter state mm:0000000056734de3 type:MM_FILEPAGES val:33 [ 31.974628] BUG: Bad rss-counter state mm:0000000056734de3 type:MM_ANONPAGES val:22 [ 32.131435] ================================================================== [ 32.132446] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.133505] Read of size 8 at addr ffff8880167c5ed8 by task sshd/220 [ 32.134463] [ 32.134704] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.135659] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.136761] Call Trace: [ 32.137124] [ 32.137440] dump_stack_lvl+0x91/0xf0 [ 32.137988] print_report+0xcc/0x620 [ 32.138547] ? __virt_addr_valid+0x102/0x340 [ 32.139154] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.139848] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.140559] kasan_report+0xbe/0xf0 [ 32.141082] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.141792] vma_interval_tree_remove+0xc75/0xec0 [ 32.142497] vma_prepare+0xc54/0x11a0 [ 32.143048] __split_vma+0x5af/0x950 [ 32.143570] ? __pfx___split_vma+0x10/0x10 [ 32.144167] ? find_held_lock+0x2c/0x110 [ 32.144751] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.145392] ? lock_is_held_type+0x9f/0x120 [ 32.146011] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.146707] ? mtree_range_walk+0x632/0x900 [ 32.147334] ? mas_walk+0x5c7/0x7c0 [ 32.147862] do_vmi_munmap+0x1f1/0x2b0 [ 32.148427] mmap_region+0x1f9/0x2660 [ 32.148956] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.149541] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.150354] ? __pfx_lock_acquire+0x10/0x10 [ 32.150961] ? __pfx_mmap_region+0x10/0x10 [ 32.151499] ? security_mmap_addr+0x7d/0xa0 [ 32.152035] ? get_unmapped_area+0x1f5/0x3f0 [ 32.152588] do_mmap+0x854/0xf00 [ 32.153023] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.153531] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.154112] ksys_mmap_pgoff+0x3af/0x500 [ 32.154619] do_syscall_64+0x3f/0x90 [ 32.155097] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.155739] RIP: 0033:0x7f894698cd82 [ 32.156188] 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 [ 32.158334] RSP: 002b:00007fff40cb7848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.159237] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f894698cd82 [ 32.160093] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8945dc6000 [ 32.160942] RBP: 00007f8945dc6000 R08: 0000000000000009 R09: 0000000000001000 [ 32.161782] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bec05f2980 [ 32.162624] R13: 00007fff40cb7860 R14: 00007fff40cb7890 R15: 00007fff40cb7bf0 [ 32.163475] [ 32.163763] [ 32.163979] Allocated by task 213: [ 32.164407] kasan_save_stack+0x22/0x50 [ 32.164914] kasan_set_track+0x25/0x30 [ 32.165402] __kasan_slab_alloc+0x59/0x70 [ 32.165918] kmem_cache_alloc+0x16b/0x370 [ 32.166442] vm_area_dup+0x20/0x160 [ 32.166898] __split_vma+0x170/0x950 [ 32.167364] split_vma+0xc6/0x110 [ 32.167811] mprotect_fixup+0x8d2/0xb30 [ 32.168307] do_mprotect_pkey+0x87e/0xd40 [ 32.168827] __x64_sys_mprotect+0x78/0xc0 [ 32.169341] do_syscall_64+0x3f/0x90 [ 32.169818] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.170458] [ 32.170676] Freed by task 213: [ 32.171065] kasan_save_stack+0x22/0x50 [ 32.171560] kasan_set_track+0x25/0x30 [ 32.172051] kasan_save_free_info+0x2b/0x50 [ 32.172585] __kasan_slab_free+0x10a/0x190 [ 32.173111] kmem_cache_free+0x10d/0x4d0 [ 32.173622] rcu_core+0x8c8/0x2860 [ 32.174068] __do_softirq+0x1b7/0x7d4 [ 32.174540] [ 32.174753] Last potentially related work creation: [ 32.175336] kasan_save_stack+0x22/0x50 [ 32.175834] __kasan_record_aux_stack+0x8e/0xa0 [ 32.176400] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.177047] remove_vma+0x139/0x170 [ 32.177498] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.178066] do_vmi_munmap+0x1f1/0x2b0 [ 32.178558] __vm_munmap+0x138/0x3a0 [ 32.179019] __x64_sys_munmap+0x59/0x80 [ 32.179519] do_syscall_64+0x3f/0x90 [ 32.180002] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.180670] [ 32.180890] The buggy address belongs to the object at ffff8880167c5e80 [ 32.180890] which belongs to the cache vm_area_struct of size 168 [ 32.182414] The buggy address is located 88 bytes inside of [ 32.182414] freed 168-byte region [ffff8880167c5e80, ffff8880167c5f28) [ 32.183855] [ 32.184074] The buggy address belongs to the physical page: [ 32.184749] page:00000000d8935585 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x167c5 [ 32.185865] memcg:ffff88800ea13101 [ 32.186328] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.186987] page_type: 0xffffffff() [ 32.187449] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.188390] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea13101 [ 32.189318] page dumped because: kasan: bad access detected [ 32.190000] [ 32.190221] Memory state around the buggy address: [ 32.190817] ffff8880167c5d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.191692] ffff8880167c5e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 32.192567] >ffff8880167c5e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.193438] ^ [ 32.194206] ffff8880167c5f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 32.195080] ffff8880167c5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.195953] ================================================================== [ 32.196939] Disabling lock debugging due to kernel taint [ 34.042749] BUG: Bad rss-counter state mm:00000000e311a6c1 type:MM_FILEPAGES val:33 [ 34.043699] BUG: Bad rss-counter state mm:00000000e311a6c1 type:MM_ANONPAGES val:22 [ 34.517284] BUG: Bad rss-counter state mm:000000005f722a34 type:MM_FILEPAGES val:33 [ 34.518500] BUG: Bad rss-counter state mm:000000005f722a34 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33728' (ECDSA) to the list of known hosts. 2023/06/19 12:33:25 fuzzer started 2023/06/19 12:33:26 dialing manager at localhost:44161 2023/06/19 12:33:26 checking machine... 2023/06/19 12:33:26 checking revisions... [ 35.292920] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:33:26 testing simple program... [ 35.343659] cgroup: Unknown subsys name 'net' [ 35.406081] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:33:25 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=00007f82304428d0 CR3=000000000dcf2000 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=2035323a33333a3231203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a33333a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888016fdf6d8 RCX=0000000000000001 RDX=1ffff11002dfbedc RSI=ffffffff8366cd3c RDI=ffff888016fdf6e0 RBP=0000000000000009 RSP=ffff888016fdf5f0 R8 =0000000000000001 R9 =ffff888016fdf650 R10=0000000000038001 R11=0000000000020c4e R12=ffff888016fdf6d8 R13=0000000000000000 R14=ffff88800fe10000 R15=ffff88800f07aa00 RIP=ffffffff813ad47f RFL=00000287 [--S--PC] 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 00007f9bde2d6900 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=00007fff268f1000 CR3=000000000eef6000 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=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