syzkaller login: [ 35.201206] BUG: Bad rss-counter state mm:00000000046d3b87 type:MM_FILEPAGES val:33 [ 35.202643] BUG: Bad rss-counter state mm:00000000046d3b87 type:MM_ANONPAGES val:22 [ 35.343069] ================================================================== [ 35.344143] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.345259] Read of size 8 at addr ffff888009481880 by task sshd/219 [ 35.346351] [ 35.346621] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.347711] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.348880] Call Trace: [ 35.349299] [ 35.349651] dump_stack_lvl+0x91/0xf0 [ 35.350155] print_report+0xcc/0x620 [ 35.350637] ? __virt_addr_valid+0x102/0x340 [ 35.351196] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.351826] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.352449] kasan_report+0xbe/0xf0 [ 35.352931] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.353568] vma_interval_tree_remove+0xc75/0xec0 [ 35.354195] vma_prepare+0xc54/0x11a0 [ 35.354683] __split_vma+0x5af/0x950 [ 35.355160] ? __pfx___split_vma+0x10/0x10 [ 35.355698] ? find_held_lock+0x2c/0x110 [ 35.356224] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.356801] ? lock_is_held_type+0x9f/0x120 [ 35.357344] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.357970] ? mtree_range_walk+0x632/0x900 [ 35.358532] ? mas_walk+0x5c7/0x7c0 [ 35.359011] do_vmi_munmap+0x1f1/0x2b0 [ 35.359515] mmap_region+0x1f9/0x2660 [ 35.360012] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.360536] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.361260] ? __pfx_lock_acquire+0x10/0x10 [ 35.361801] ? __pfx_mmap_region+0x10/0x10 [ 35.362342] ? security_mmap_addr+0x7d/0xa0 [ 35.362885] ? get_unmapped_area+0x1f5/0x3f0 [ 35.363443] do_mmap+0x854/0xf00 [ 35.363889] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.364392] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.364959] ksys_mmap_pgoff+0x3af/0x500 [ 35.365481] do_syscall_64+0x3f/0x90 [ 35.365973] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.366629] RIP: 0033:0x7f4432492d82 [ 35.367099] 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 [ 35.369248] RSP: 002b:00007ffcad0c8108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.370183] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4432492d82 [ 35.371037] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f44318cc000 [ 35.371894] RBP: 00007f44318cc000 R08: 0000000000000009 R09: 0000000000001000 [ 35.372758] R10: 0000000000000812 R11: 0000000000000206 R12: 000056543923d980 [ 35.373606] R13: 00007ffcad0c8120 R14: 00007ffcad0c8150 R15: 00007ffcad0c84b0 [ 35.374473] [ 35.374772] [ 35.374988] Allocated by task 212: [ 35.375420] kasan_save_stack+0x22/0x50 [ 35.375937] kasan_set_track+0x25/0x30 [ 35.376434] __kasan_slab_alloc+0x59/0x70 [ 35.376963] kmem_cache_alloc+0x16b/0x370 [ 35.377486] vm_area_dup+0x20/0x160 [ 35.377974] __split_vma+0x170/0x950 [ 35.378441] split_vma+0xc6/0x110 [ 35.378893] mprotect_fixup+0x8d2/0xb30 [ 35.379398] do_mprotect_pkey+0x87e/0xd40 [ 35.379938] __x64_sys_mprotect+0x78/0xc0 [ 35.380471] do_syscall_64+0x3f/0x90 [ 35.380958] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.381603] [ 35.381828] Freed by task 212: [ 35.382222] kasan_save_stack+0x22/0x50 [ 35.382724] kasan_set_track+0x25/0x30 [ 35.383224] kasan_save_free_info+0x2b/0x50 [ 35.383758] __kasan_slab_free+0x10a/0x190 [ 35.384294] kmem_cache_free+0x10d/0x4d0 [ 35.384804] rcu_core+0x8c8/0x2860 [ 35.385254] __do_softirq+0x1b7/0x7d4 [ 35.385736] [ 35.385957] Last potentially related work creation: [ 35.386606] kasan_save_stack+0x22/0x50 [ 35.387114] __kasan_record_aux_stack+0x8e/0xa0 [ 35.387695] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.388345] remove_vma+0x139/0x170 [ 35.388802] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.389368] do_vmi_munmap+0x1f1/0x2b0 [ 35.389862] __vm_munmap+0x138/0x3a0 [ 35.390336] __x64_sys_munmap+0x59/0x80 [ 35.390836] do_syscall_64+0x3f/0x90 [ 35.391318] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.391961] [ 35.392180] Second to last potentially related work creation: [ 35.392865] kasan_save_stack+0x22/0x50 [ 35.393370] __kasan_record_aux_stack+0x8e/0xa0 [ 35.393953] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.394600] remove_vma+0x139/0x170 [ 35.395060] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.395626] do_vmi_munmap+0x1f1/0x2b0 [ 35.396112] mmap_region+0x1f9/0x2660 [ 35.396591] do_mmap+0x854/0xf00 [ 35.397029] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.397525] ksys_mmap_pgoff+0x3af/0x500 [ 35.398049] do_syscall_64+0x3f/0x90 [ 35.398531] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.399181] [ 35.399401] The buggy address belongs to the object at ffff888009481828 [ 35.399401] which belongs to the cache vm_area_struct of size 168 [ 35.400871] The buggy address is located 88 bytes inside of [ 35.400871] freed 168-byte region [ffff888009481828, ffff8880094818d0) [ 35.402295] [ 35.402512] The buggy address belongs to the physical page: [ 35.403173] page:000000001a11e566 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9481 [ 35.404272] memcg:ffff88801408c701 [ 35.404707] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.405420] page_type: 0xffffffff() [ 35.405895] raw: 0100000000000200 ffff8880087a0c80 ffffea00003ad5c0 dead000000000007 [ 35.406817] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801408c701 [ 35.407741] page dumped because: kasan: bad access detected [ 35.408418] [ 35.408634] Memory state around the buggy address: [ 35.409220] ffff888009481780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 35.410092] ffff888009481800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.410951] >ffff888009481880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.411813] ^ [ 35.412230] ffff888009481900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.413085] ffff888009481980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 35.413955] ================================================================== [ 35.414891] Disabling lock debugging due to kernel taint [ 37.507616] BUG: Bad rss-counter state mm:000000000c5b3f33 type:MM_FILEPAGES val:33 [ 37.509039] BUG: Bad rss-counter state mm:000000000c5b3f33 type:MM_ANONPAGES val:22 [ 38.039471] BUG: Bad rss-counter state mm:0000000080c89b33 type:MM_FILEPAGES val:33 [ 38.040652] BUG: Bad rss-counter state mm:0000000080c89b33 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23005' (ECDSA) to the list of known hosts. 2023/06/20 22:36:21 fuzzer started 2023/06/20 22:36:22 dialing manager at localhost:36067 2023/06/20 22:36:22 checking machine... 2023/06/20 22:36:22 checking revisions... [ 38.812240] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:36:22 testing simple program... [ 38.865676] cgroup: Unknown subsys name 'net' [ 38.932762] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:36:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff860a1401 RDX=1ffff1100d9c135b RSI=ffffffff8451105e RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff860a1444 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000792d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff811306da RFL=00000212 [----A--] 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 00007fd5b0b7f700 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=00007ffe42f12ae8 CR3=000000000e4c2000 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=2031323a36333a3232203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a36333a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000001 RCX=ffffffff81efcf34 RDX=0000000000000010 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000001 RSP=ffff88800fc3fb98 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000010 R11=0000000000000000 R12=0000000000000010 R13=0000000000000007 R14=0000000000000059 R15=ffff88800fc3fc20 RIP=ffffffff814c0250 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 00007fbd98102900 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=00007fbd986ba0b0 CR3=000000000d9d8000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000