syzkaller login: [ 31.026963] BUG: Bad rss-counter state mm:00000000f68c3e23 type:MM_FILEPAGES val:33 [ 31.028053] BUG: Bad rss-counter state mm:00000000f68c3e23 type:MM_ANONPAGES val:22 [ 31.184971] ================================================================== [ 31.186062] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.187193] Read of size 8 at addr ffff888019b2aed8 by task sshd/219 [ 31.188203] [ 31.188490] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.189515] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.190721] Call Trace: [ 31.191099] [ 31.191439] dump_stack_lvl+0x91/0xf0 [ 31.192025] print_report+0xcc/0x620 [ 31.192600] ? __virt_addr_valid+0x102/0x340 [ 31.193255] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.193991] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.194680] kasan_report+0xbe/0xf0 [ 31.195156] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.195770] vma_interval_tree_remove+0xc75/0xec0 [ 31.196369] vma_prepare+0xc54/0x11a0 [ 31.196851] __split_vma+0x5af/0x950 [ 31.197321] ? __pfx___split_vma+0x10/0x10 [ 31.197843] ? find_held_lock+0x2c/0x110 [ 31.198371] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.198935] ? lock_is_held_type+0x9f/0x120 [ 31.199468] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.200072] ? mtree_range_walk+0x632/0x900 [ 31.200629] ? mas_walk+0x5c7/0x7c0 [ 31.201107] do_vmi_munmap+0x1f1/0x2b0 [ 31.201600] mmap_region+0x1f9/0x2660 [ 31.202102] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.202612] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.203328] ? __pfx_lock_acquire+0x10/0x10 [ 31.203860] ? __pfx_mmap_region+0x10/0x10 [ 31.204387] ? security_mmap_addr+0x7d/0xa0 [ 31.204916] ? get_unmapped_area+0x1f5/0x3f0 [ 31.205466] do_mmap+0x854/0xf00 [ 31.205911] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.206417] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.206985] ksys_mmap_pgoff+0x3af/0x500 [ 31.207499] do_syscall_64+0x3f/0x90 [ 31.207977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.208630] RIP: 0033:0x7f50ab529d82 [ 31.209087] 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 [ 31.211218] RSP: 002b:00007ffff502b938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.212132] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f50ab529d82 [ 31.212990] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f50aa963000 [ 31.213855] RBP: 00007f50aa963000 R08: 0000000000000009 R09: 0000000000001000 [ 31.214726] R10: 0000000000000812 R11: 0000000000000206 R12: 00005578431beec0 [ 31.215575] R13: 00007ffff502b950 R14: 00007ffff502b980 R15: 00007ffff502bce0 [ 31.216441] [ 31.216730] [ 31.216943] Allocated by task 212: [ 31.217369] kasan_save_stack+0x22/0x50 [ 31.217876] kasan_set_track+0x25/0x30 [ 31.218378] __kasan_slab_alloc+0x59/0x70 [ 31.218897] kmem_cache_alloc+0x16b/0x370 [ 31.219407] vm_area_dup+0x20/0x160 [ 31.219859] __split_vma+0x170/0x950 [ 31.220320] split_vma+0xc6/0x110 [ 31.220752] mprotect_fixup+0x8d2/0xb30 [ 31.221250] do_mprotect_pkey+0x87e/0xd40 [ 31.221769] __x64_sys_mprotect+0x78/0xc0 [ 31.222300] do_syscall_64+0x3f/0x90 [ 31.222776] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.223411] [ 31.223628] Freed by task 212: [ 31.224018] kasan_save_stack+0x22/0x50 [ 31.224515] kasan_set_track+0x25/0x30 [ 31.225014] kasan_save_free_info+0x2b/0x50 [ 31.225545] __kasan_slab_free+0x10a/0x190 [ 31.226074] kmem_cache_free+0x10d/0x4d0 [ 31.226584] rcu_core+0x8c8/0x2860 [ 31.227028] __do_softirq+0x1b7/0x7d4 [ 31.227502] [ 31.227719] Last potentially related work creation: [ 31.228302] kasan_save_stack+0x22/0x50 [ 31.228801] __kasan_record_aux_stack+0x8e/0xa0 [ 31.229424] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.230059] remove_vma+0x139/0x170 [ 31.230528] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.231083] do_vmi_munmap+0x1f1/0x2b0 [ 31.231566] __vm_munmap+0x138/0x3a0 [ 31.232034] __x64_sys_munmap+0x59/0x80 [ 31.232533] do_syscall_64+0x3f/0x90 [ 31.233009] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.233643] [ 31.233857] The buggy address belongs to the object at ffff888019b2ae80 [ 31.233857] which belongs to the cache vm_area_struct of size 168 [ 31.235317] The buggy address is located 88 bytes inside of [ 31.235317] freed 168-byte region [ffff888019b2ae80, ffff888019b2af28) [ 31.236711] [ 31.236925] The buggy address belongs to the physical page: [ 31.237582] page:00000000b5e8c53b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b2a [ 31.238686] memcg:ffff88800eae1501 [ 31.239109] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.239749] page_type: 0xffffffff() [ 31.240201] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.241112] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eae1501 [ 31.242008] page dumped because: kasan: bad access detected [ 31.242681] [ 31.242893] Memory state around the buggy address: [ 31.243471] ffff888019b2ad80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.244325] ffff888019b2ae00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.245168] >ffff888019b2ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.246005] ^ [ 31.246733] ffff888019b2af00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.247577] ffff888019b2af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.248413] ================================================================== [ 31.249322] Disabling lock debugging due to kernel taint [ 33.297771] BUG: Bad rss-counter state mm:0000000079e594cc type:MM_FILEPAGES val:33 [ 33.298889] BUG: Bad rss-counter state mm:0000000079e594cc type:MM_ANONPAGES val:22 [ 33.752120] BUG: Bad rss-counter state mm:000000005f49dbfb type:MM_FILEPAGES val:33 [ 33.753238] BUG: Bad rss-counter state mm:000000005f49dbfb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39136' (ECDSA) to the list of known hosts. 2023/06/21 04:09:53 fuzzer started 2023/06/21 04:09:53 dialing manager at localhost:36067 2023/06/21 04:09:53 checking machine... 2023/06/21 04:09:53 checking revisions... [ 34.479909] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:09:53 testing simple program... [ 34.529473] cgroup: Unknown subsys name 'net' [ 34.562553] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:09:52 Registers: info registers vcpu 0 RAX=ffffffff813ad720 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801633f601 RSI=ffff88801633f6c8 RDI=ffff88801633f6c8 RBP=ffff88801633f680 RSP=ffff88801633f568 R8 =ffffffff8608a55a R9 =ffff88801633f668 R10=0000000000038001 R11=0000000000003c0d R12=ffff88801633f688 R13=ffff88801633f670 R14=ffff88801633f6d0 R15=ffff88801633f628 RIP=ffffffff81131041 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 00007f72a6962700 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=00005652297df7d4 CR3=0000000016f64000 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=2032353a39303a3430203132206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a383134363320 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a39303a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000561f91e32ea0 RCX=0000000000000010 RDX=00007fff3c156ca0 RSI=0000000000000000 RDI=0000561f91e26360 RBP=00007fff3c156d20 RSP=00007fff3c156a58 R8 =0000000000000000 R9 =000000000000002b R10=0000000000000017 R11=0000000000000000 R12=00007fff3c156db0 R13=00007fff3c157590 R14=0000000000000000 R15=00007fff3c156ca0 RIP=00007ff0b60dd0b0 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff0b5563900 00000000 00000000 GS =0000 0000000000000000 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=00007ff0b497a9c0 CR3=000000001465e000 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=ffffffffffffff00ffffffffff000000 XMM02=00000000000000000000000000000000 XMM03=000000006563696c732e6d6574737973 XMM04=389e1f2aed55f7c400000000000ae988 XMM05=f565dcbd668286030000000000132bc8 XMM06=4fda316b135da52b0000000000131c68 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000