syzkaller login: [ 33.001650] BUG: Bad rss-counter state mm:000000004fd7a52f type:MM_FILEPAGES val:33 [ 33.002316] BUG: Bad rss-counter state mm:000000004fd7a52f type:MM_ANONPAGES val:22 [ 33.116958] ================================================================== [ 33.117570] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.118168] Read of size 8 at addr ffff88800dff7d08 by task sshd/219 [ 33.118660] [ 33.118801] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.119350] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.119966] Call Trace: [ 33.120171] [ 33.120354] dump_stack_lvl+0x91/0xf0 [ 33.120669] print_report+0xcc/0x620 [ 33.120993] ? __virt_addr_valid+0x102/0x340 [ 33.121348] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.121936] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.122332] kasan_report+0xbe/0xf0 [ 33.122640] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.123040] vma_interval_tree_remove+0xc75/0xec0 [ 33.123427] vma_prepare+0xc54/0x11a0 [ 33.123736] __split_vma+0x5af/0x950 [ 33.124049] ? __pfx___split_vma+0x10/0x10 [ 33.124386] ? find_held_lock+0x2c/0x110 [ 33.124730] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.125119] ? lock_is_held_type+0x9f/0x120 [ 33.125463] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.125852] ? mtree_range_walk+0x632/0x900 [ 33.126207] ? mas_walk+0x5c7/0x7c0 [ 33.126512] do_vmi_munmap+0x1f1/0x2b0 [ 33.126832] mmap_region+0x1f9/0x2660 [ 33.127142] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.127472] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.127942] ? __pfx_lock_acquire+0x10/0x10 [ 33.128284] ? __pfx_mmap_region+0x10/0x10 [ 33.128626] ? security_mmap_addr+0x7d/0xa0 [ 33.128981] ? get_unmapped_area+0x1f5/0x3f0 [ 33.129336] do_mmap+0x854/0xf00 [ 33.129622] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.129944] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.130306] ksys_mmap_pgoff+0x3af/0x500 [ 33.130632] do_syscall_64+0x3f/0x90 [ 33.130947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.131365] RIP: 0033:0x7f885015fd82 [ 33.131660] 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 [ 33.133176] RSP: 002b:00007fff2a84cd58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.133783] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f885015fd82 [ 33.134348] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f884f599000 [ 33.134921] RBP: 00007f884f599000 R08: 0000000000000009 R09: 0000000000001000 [ 33.135508] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e32d749f70 [ 33.136067] R13: 00007fff2a84cd70 R14: 00007fff2a84cda0 R15: 00007fff2a84d100 [ 33.136707] [ 33.136940] [ 33.137084] Allocated by task 212: [ 33.137367] kasan_save_stack+0x22/0x50 [ 33.137723] kasan_set_track+0x25/0x30 [ 33.138041] __kasan_slab_alloc+0x59/0x70 [ 33.138374] kmem_cache_alloc+0x16b/0x370 [ 33.138715] vm_area_dup+0x20/0x160 [ 33.139020] __split_vma+0x170/0x950 [ 33.139332] split_vma+0xc6/0x110 [ 33.139621] mprotect_fixup+0x8d2/0xb30 [ 33.139981] do_mprotect_pkey+0x87e/0xd40 [ 33.140323] __x64_sys_mprotect+0x78/0xc0 [ 33.140684] do_syscall_64+0x3f/0x90 [ 33.141015] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.141428] [ 33.141569] Freed by task 203: [ 33.141819] kasan_save_stack+0x22/0x50 [ 33.142144] kasan_set_track+0x25/0x30 [ 33.142460] kasan_save_free_info+0x2b/0x50 [ 33.142809] __kasan_slab_free+0x10a/0x190 [ 33.143149] kmem_cache_free+0x10d/0x4d0 [ 33.143510] rcu_core+0x8c8/0x2860 [ 33.143800] __do_softirq+0x1b7/0x7d4 [ 33.144159] [ 33.144301] Last potentially related work creation: [ 33.144672] kasan_save_stack+0x22/0x50 [ 33.145028] __kasan_record_aux_stack+0x8e/0xa0 [ 33.145392] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.145800] remove_vma+0x139/0x170 [ 33.146110] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.146487] do_vmi_munmap+0x1f1/0x2b0 [ 33.146836] __vm_munmap+0x138/0x3a0 [ 33.147130] __x64_sys_munmap+0x59/0x80 [ 33.147438] do_syscall_64+0x3f/0x90 [ 33.147759] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.148176] [ 33.148314] Second to last potentially related work creation: [ 33.148743] kasan_save_stack+0x22/0x50 [ 33.149085] __kasan_record_aux_stack+0x8e/0xa0 [ 33.149456] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.149886] remove_vma+0x139/0x170 [ 33.150180] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.150543] do_vmi_munmap+0x1f1/0x2b0 [ 33.150869] mmap_region+0x1f9/0x2660 [ 33.151187] do_mmap+0x854/0xf00 [ 33.151475] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.151808] ksys_mmap_pgoff+0x3af/0x500 [ 33.152156] do_syscall_64+0x3f/0x90 [ 33.152477] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.152941] [ 33.153083] The buggy address belongs to the object at ffff88800dff7cb0 [ 33.153083] which belongs to the cache vm_area_struct of size 168 [ 33.154049] The buggy address is located 88 bytes inside of [ 33.154049] freed 168-byte region [ffff88800dff7cb0, ffff88800dff7d58) [ 33.154990] [ 33.155139] The buggy address belongs to the physical page: [ 33.155599] page:00000000c6ca3834 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdff7 [ 33.156339] memcg:ffff88800df0d401 [ 33.156631] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.157100] page_type: 0xffffffff() [ 33.157400] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 33.158020] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df0d401 [ 33.158616] page dumped because: kasan: bad access detected [ 33.159172] [ 33.159320] Memory state around the buggy address: [ 33.159715] ffff88800dff7c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.160402] ffff88800dff7c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.160973] >ffff88800dff7d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.161542] ^ [ 33.161843] ffff88800dff7d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.162410] ffff88800dff7e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 33.162981] ================================================================== [ 33.163843] Disabling lock debugging due to kernel taint [ 34.486943] BUG: Bad rss-counter state mm:00000000fea2fde0 type:MM_FILEPAGES val:33 [ 34.487635] BUG: Bad rss-counter state mm:00000000fea2fde0 type:MM_ANONPAGES val:22 [ 34.798438] BUG: Bad rss-counter state mm:000000000c528934 type:MM_FILEPAGES val:33 [ 34.799341] BUG: Bad rss-counter state mm:000000000c528934 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11487' (ECDSA) to the list of known hosts. 2023/06/20 08:43:53 fuzzer started 2023/06/20 08:43:53 dialing manager at localhost:44161 2023/06/20 08:43:53 checking machine... 2023/06/20 08:43:53 checking revisions... [ 35.338557] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:43:53 testing simple program... [ 35.371621] cgroup: Unknown subsys name 'net' [ 35.421207] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:43:50 Registers: info registers vcpu 0 RAX=00000000000002f1 RBX=0000000000000031 RCX=0000000000000000 RDX=ffff888016bad1c0 RSI=ffffffff81f586c7 RDI=0000000000000005 RBP=ffff88800ff9e000 RSP=ffff88800f77fa78 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff8880101080d8 R13=0000000000000001 R14=0000000000000062 R15=dffffc0000000000 RIP=ffffffff81f58709 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 00007fe0e27dc900 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=00007ffded2c1000 CR3=0000000016f8c000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800e8843f8 RBX=ffff88800e854f18 RCX=1ffff110012a7e0f RDX=dffffc0000000000 RSI=ffffffff87b86f80 RDI=ffff88800953f078 RBP=ffff88801a21b260 RSP=ffff88806cf09db8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=0000000000000000 R12=0000000000000287 R13=ffff88801a21b2c8 R14=ffff88800953f068 R15=ffffffff87b86f80 RIP=ffffffff844cc239 RFL=00000046 [---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 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=00007f00c3b3aa00 CR3=000000000f6e4000 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=2032353a33343a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a33343a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000