syzkaller login: [ 31.978255] BUG: Bad rss-counter state mm:000000003e14fdc0 type:MM_FILEPAGES val:33 [ 31.979937] BUG: Bad rss-counter state mm:000000003e14fdc0 type:MM_ANONPAGES val:22 [ 32.138272] ================================================================== [ 32.139187] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.140145] Read of size 8 at addr ffff888019800ed8 by task sshd/219 [ 32.140932] [ 32.141236] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.142112] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.143095] Call Trace: [ 32.143425] [ 32.143712] dump_stack_lvl+0x91/0xf0 [ 32.144212] print_report+0xcc/0x620 [ 32.144703] ? __virt_addr_valid+0x102/0x340 [ 32.145295] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.145918] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.146535] kasan_report+0xbe/0xf0 [ 32.147011] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.147634] vma_interval_tree_remove+0xc75/0xec0 [ 32.148276] vma_prepare+0xc54/0x11a0 [ 32.148782] __split_vma+0x5af/0x950 [ 32.149273] ? __pfx___split_vma+0x10/0x10 [ 32.149805] ? find_held_lock+0x2c/0x110 [ 32.150335] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.150898] ? lock_is_held_type+0x9f/0x120 [ 32.151447] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.152060] ? mtree_range_walk+0x632/0x900 [ 32.152610] ? mas_walk+0x5c7/0x7c0 [ 32.153095] do_vmi_munmap+0x1f1/0x2b0 [ 32.153593] mmap_region+0x1f9/0x2660 [ 32.154078] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.154587] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.155305] ? __pfx_lock_acquire+0x10/0x10 [ 32.155840] ? __pfx_mmap_region+0x10/0x10 [ 32.156379] ? security_mmap_addr+0x7d/0xa0 [ 32.156940] ? get_unmapped_area+0x1f5/0x3f0 [ 32.157505] do_mmap+0x854/0xf00 [ 32.157944] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.158451] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.159017] ksys_mmap_pgoff+0x3af/0x500 [ 32.159531] do_syscall_64+0x3f/0x90 [ 32.160014] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.160665] RIP: 0033:0x7f1e42957d82 [ 32.161137] 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 [ 32.163392] RSP: 002b:00007ffc085793b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.164358] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1e42957d82 [ 32.165242] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1e41d91000 [ 32.166112] RBP: 00007f1e41d91000 R08: 0000000000000009 R09: 0000000000001000 [ 32.167005] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558100a18f60 [ 32.167886] R13: 00007ffc085793d0 R14: 00007ffc08579400 R15: 00007ffc08579760 [ 32.168786] [ 32.169132] [ 32.169367] Allocated by task 212: [ 32.169808] kasan_save_stack+0x22/0x50 [ 32.170331] kasan_set_track+0x25/0x30 [ 32.170845] __kasan_slab_alloc+0x59/0x70 [ 32.171394] kmem_cache_alloc+0x16b/0x370 [ 32.171926] vm_area_dup+0x20/0x160 [ 32.172405] __split_vma+0x170/0x950 [ 32.172896] split_vma+0xc6/0x110 [ 32.173346] mprotect_fixup+0x8d2/0xb30 [ 32.173865] do_mprotect_pkey+0x87e/0xd40 [ 32.174410] __x64_sys_mprotect+0x78/0xc0 [ 32.174943] do_syscall_64+0x3f/0x90 [ 32.175444] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.176127] [ 32.176348] Freed by task 212: [ 32.176769] kasan_save_stack+0x22/0x50 [ 32.177327] kasan_set_track+0x25/0x30 [ 32.177867] kasan_save_free_info+0x2b/0x50 [ 32.178434] __kasan_slab_free+0x10a/0x190 [ 32.179009] kmem_cache_free+0x10d/0x4d0 [ 32.179550] rcu_core+0x8c8/0x2860 [ 32.180018] __do_softirq+0x1b7/0x7d4 [ 32.180527] [ 32.180758] Last potentially related work creation: [ 32.181383] kasan_save_stack+0x22/0x50 [ 32.181926] __kasan_record_aux_stack+0x8e/0xa0 [ 32.182533] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.183220] remove_vma+0x139/0x170 [ 32.183694] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.184295] do_vmi_munmap+0x1f1/0x2b0 [ 32.184801] __vm_munmap+0x138/0x3a0 [ 32.185312] __x64_sys_munmap+0x59/0x80 [ 32.185846] do_syscall_64+0x3f/0x90 [ 32.186352] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.187040] [ 32.187268] The buggy address belongs to the object at ffff888019800e80 [ 32.187268] which belongs to the cache vm_area_struct of size 168 [ 32.188859] The buggy address is located 88 bytes inside of [ 32.188859] freed 168-byte region [ffff888019800e80, ffff888019800f28) [ 32.190397] [ 32.190627] The buggy address belongs to the physical page: [ 32.191340] page:00000000e69c360a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19800 [ 32.192521] memcg:ffff88800e480001 [ 32.192982] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.193692] page_type: 0xffffffff() [ 32.194173] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 32.195146] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e480001 [ 32.196133] page dumped because: kasan: bad access detected [ 32.196847] [ 32.197253] Memory state around the buggy address: [ 32.197992] ffff888019800d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.199067] ffff888019800e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 32.200137] >ffff888019800e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.201225] ^ [ 32.202131] ffff888019800f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 32.203201] ffff888019800f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.204261] ================================================================== [ 32.205663] Disabling lock debugging due to kernel taint [ 34.666700] BUG: Bad rss-counter state mm:00000000fdacbe27 type:MM_FILEPAGES val:33 [ 34.667816] BUG: Bad rss-counter state mm:00000000fdacbe27 type:MM_ANONPAGES val:22 [ 35.288279] BUG: Bad rss-counter state mm:00000000b861e0f9 type:MM_FILEPAGES val:33 [ 35.289500] BUG: Bad rss-counter state mm:00000000b861e0f9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27396' (ECDSA) to the list of known hosts. 2023/06/21 04:34:05 fuzzer started 2023/06/21 04:34:05 dialing manager at localhost:36067 2023/06/21 04:34:05 checking machine... 2023/06/21 04:34:05 checking revisions... [ 35.923141] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:34:05 testing simple program... [ 35.963461] cgroup: Unknown subsys name 'net' [ 35.996588] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:34:05 Registers: info registers vcpu 0 RAX=0000000064927dbd RBX=00007f0d070257c0 RCX=000000000000003e RDX=0000000000000000 RSI=00007f0d070256a0 RDI=00007f0d07025698 RBP=0000000000000000 RSP=00007f0d07025688 R8 =0000000000000064 R9 =0000000000000001 R10=0000000000000001 R11=00007f0d070258b0 R12=00007f0d070257b0 R13=0000000000001fa0 R14=00007f0d00000ba0 R15=0000000000000003 RIP=00007f0d07474020 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 00007f0d07029700 00000000 00000000 GS =0000 0000000000000000 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=00007f9afb3da600 CR3=00000000166f0000 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=00000000000000000000000000000000 XMM01=00000000000130730000000064927dbd XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303435 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=0000000000000001 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=00007fcf2bf5d618 CR3=000000000dde4000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000