syzkaller login: [ 28.777011] BUG: Bad rss-counter state mm:00000000368a3869 type:MM_FILEPAGES val:33 [ 28.778267] BUG: Bad rss-counter state mm:00000000368a3869 type:MM_ANONPAGES val:22 [ 28.974110] ================================================================== [ 28.975180] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.976277] Read of size 8 at addr ffff888016ae56b0 by task sshd/223 [ 28.977249] [ 28.977502] CPU: 0 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.978544] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.979671] Call Trace: [ 28.980054] [ 28.980384] dump_stack_lvl+0x91/0xf0 [ 28.980952] print_report+0xcc/0x620 [ 28.981514] ? __virt_addr_valid+0x102/0x340 [ 28.982151] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.982866] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.983585] kasan_report+0xbe/0xf0 [ 28.984145] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.984864] vma_interval_tree_remove+0xc75/0xec0 [ 28.985561] vma_prepare+0xc54/0x11a0 [ 28.986115] __split_vma+0x5af/0x950 [ 28.986662] ? __pfx___split_vma+0x10/0x10 [ 28.987275] ? find_held_lock+0x2c/0x110 [ 28.987901] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.988558] ? lock_is_held_type+0x9f/0x120 [ 28.989184] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.989893] ? mtree_range_walk+0x632/0x900 [ 28.990532] ? mas_walk+0x5c7/0x7c0 [ 28.991082] do_vmi_munmap+0x1f1/0x2b0 [ 28.991659] mmap_region+0x1f9/0x2660 [ 28.992231] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.992830] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.993665] ? __pfx_lock_acquire+0x10/0x10 [ 28.994287] ? __pfx_mmap_region+0x10/0x10 [ 28.994907] ? security_mmap_addr+0x7d/0xa0 [ 28.995522] ? get_unmapped_area+0x1f5/0x3f0 [ 28.996170] do_mmap+0x854/0xf00 [ 28.996679] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.997254] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.997907] ksys_mmap_pgoff+0x3af/0x500 [ 28.998498] do_syscall_64+0x3f/0x90 [ 28.999054] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.999821] RIP: 0033:0x7fbfb25bcd82 [ 29.000353] 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 [ 29.002826] RSP: 002b:00007fff885742b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.003898] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbfb25bcd82 [ 29.004896] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbfb19f6000 [ 29.005889] RBP: 00007fbfb19f6000 R08: 0000000000000009 R09: 0000000000001000 [ 29.006873] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558d03ba4b20 [ 29.007876] R13: 00007fff885742d0 R14: 00007fff88574300 R15: 00007fff88574660 [ 29.008878] [ 29.009215] [ 29.009466] Allocated by task 213: [ 29.009963] kasan_save_stack+0x22/0x50 [ 29.010549] kasan_set_track+0x25/0x30 [ 29.011128] __kasan_slab_alloc+0x59/0x70 [ 29.011734] kmem_cache_alloc+0x16b/0x370 [ 29.012349] vm_area_dup+0x20/0x160 [ 29.012878] __split_vma+0x170/0x950 [ 29.013422] split_vma+0xc6/0x110 [ 29.013938] mprotect_fixup+0x8d2/0xb30 [ 29.014520] do_mprotect_pkey+0x87e/0xd40 [ 29.015127] __x64_sys_mprotect+0x78/0xc0 [ 29.015740] do_syscall_64+0x3f/0x90 [ 29.016316] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.017066] [ 29.017318] Freed by task 213: [ 29.017772] kasan_save_stack+0x22/0x50 [ 29.018357] kasan_set_track+0x25/0x30 [ 29.018930] kasan_save_free_info+0x2b/0x50 [ 29.019551] __kasan_slab_free+0x10a/0x190 [ 29.020183] kmem_cache_free+0x10d/0x4d0 [ 29.020774] rcu_core+0x8c8/0x2860 [ 29.021290] __do_softirq+0x1b7/0x7d4 [ 29.021842] [ 29.022093] Last potentially related work creation: [ 29.022775] kasan_save_stack+0x22/0x50 [ 29.023362] __kasan_record_aux_stack+0x8e/0xa0 [ 29.024043] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.024799] remove_vma+0x139/0x170 [ 29.025323] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.025973] do_vmi_munmap+0x1f1/0x2b0 [ 29.026537] __vm_munmap+0x138/0x3a0 [ 29.027085] __x64_sys_munmap+0x59/0x80 [ 29.027663] do_syscall_64+0x3f/0x90 [ 29.028238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.028995] [ 29.029245] The buggy address belongs to the object at ffff888016ae5658 [ 29.029245] which belongs to the cache vm_area_struct of size 168 [ 29.030968] The buggy address is located 88 bytes inside of [ 29.030968] freed 168-byte region [ffff888016ae5658, ffff888016ae5700) [ 29.032617] [ 29.032866] The buggy address belongs to the physical page: [ 29.033649] page:000000004da562cc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ae5 [ 29.034923] memcg:ffff88800ed50001 [ 29.035427] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.036196] page_type: 0xffffffff() [ 29.036728] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.037813] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed50001 [ 29.038920] page dumped because: kasan: bad access detected [ 29.039703] [ 29.039972] Memory state around the buggy address: [ 29.040772] ffff888016ae5580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.042103] ffff888016ae5600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 29.043429] >ffff888016ae5680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.044762] ^ [ 29.045665] ffff888016ae5700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 29.046989] ffff888016ae5780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 29.048325] ================================================================== [ 29.049927] Disabling lock debugging due to kernel taint [ 30.932177] BUG: Bad rss-counter state mm:00000000b8ffca41 type:MM_FILEPAGES val:33 [ 30.933184] BUG: Bad rss-counter state mm:00000000b8ffca41 type:MM_ANONPAGES val:22 [ 31.419977] BUG: Bad rss-counter state mm:0000000096d38acb type:MM_FILEPAGES val:33 [ 31.420758] BUG: Bad rss-counter state mm:0000000096d38acb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25725' (ECDSA) to the list of known hosts. 2023/06/21 04:11:19 fuzzer started 2023/06/21 04:11:19 dialing manager at localhost:36067 2023/06/21 04:11:19 checking machine... 2023/06/21 04:11:19 checking revisions... [ 32.125493] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:11:19 testing simple program... [ 32.193963] cgroup: Unknown subsys name 'net' [ 32.256801] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:11:19 Registers: info registers vcpu 0 RAX=77c54139794be300 RBX=0000000000000064 RCX=0000000000000001 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=00007f699b0ae650 R8 =00007f699b0b2700 R9 =000055661b55be88 R10=0000000000000000 R11=0000000000000246 R12=0000000000000000 R13=00007f6994008640 R14=00007f6994000ba0 R15=00007f699b0ae788 RIP=0000556619acfdc2 RFL=00000206 [-----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 00007f699b0b2700 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=00007fa6341172a0 CR3=000000000979c000 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=31313a3430203132206e754a3e38333c XMM01=656e6e6f637369642064657669656365 XMM02=63736964203a31313a38353135332074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383531 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=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800d67b680 RSI=ffffffff818bef7a RDI=ffff88801cde7b68 RBP=0000000000000001 RSP=ffff88801cde7900 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=ffff88801cde7b68 R14=0000000000000345 R15=dffffc0000000000 RIP=ffffffff814c0880 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 00007fd88a1bc900 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=00007ffc121f7000 CR3=000000000e6f8000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000