syzkaller login: [ 51.067421] BUG: Bad rss-counter state mm:00000000613d2c4a type:MM_FILEPAGES val:33 [ 51.068361] BUG: Bad rss-counter state mm:00000000613d2c4a type:MM_ANONPAGES val:22 [ 51.244550] ================================================================== [ 51.245566] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 51.246602] Read of size 8 at addr ffff8880102db140 by task sshd/220 [ 51.247552] [ 51.247798] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 51.248761] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 51.249886] Call Trace: [ 51.250241] [ 51.250551] dump_stack_lvl+0x91/0xf0 [ 51.251099] print_report+0xcc/0x620 [ 51.251624] ? __virt_addr_valid+0x102/0x340 [ 51.252233] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.252911] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.253599] kasan_report+0xbe/0xf0 [ 51.254122] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.254797] vma_interval_tree_remove+0xc75/0xec0 [ 51.255478] vma_prepare+0xc54/0x11a0 [ 51.256025] __split_vma+0x5af/0x950 [ 51.256566] ? __pfx___split_vma+0x10/0x10 [ 51.257165] ? find_held_lock+0x2c/0x110 [ 51.257775] do_vmi_align_munmap+0x2ba/0x11f0 [ 51.258411] ? lock_is_held_type+0x9f/0x120 [ 51.259022] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 51.259708] ? mtree_range_walk+0x632/0x900 [ 51.260326] ? mas_walk+0x5c7/0x7c0 [ 51.260850] do_vmi_munmap+0x1f1/0x2b0 [ 51.261399] mmap_region+0x1f9/0x2660 [ 51.261949] ? vm_mmap_pgoff+0x15c/0x3a0 [ 51.262524] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 51.263324] ? __pfx_lock_acquire+0x10/0x10 [ 51.263922] ? __pfx_mmap_region+0x10/0x10 [ 51.264517] ? security_mmap_addr+0x7d/0xa0 [ 51.265111] ? get_unmapped_area+0x1f5/0x3f0 [ 51.265732] do_mmap+0x854/0xf00 [ 51.266221] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.266774] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 51.267407] ksys_mmap_pgoff+0x3af/0x500 [ 51.267974] do_syscall_64+0x3f/0x90 [ 51.268510] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.269235] RIP: 0033:0x7f7be3009d82 [ 51.269756] 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 [ 51.272129] RSP: 002b:00007ffd33125638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 51.273139] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7be3009d82 [ 51.274090] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7be2443000 [ 51.275041] RBP: 00007f7be2443000 R08: 0000000000000009 R09: 0000000000001000 [ 51.275989] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558326574d90 [ 51.276932] R13: 00007ffd33125650 R14: 00007ffd33125680 R15: 00007ffd331259e0 [ 51.277896] [ 51.278224] [ 51.278460] Allocated by task 213: [ 51.278932] kasan_save_stack+0x22/0x50 [ 51.279491] kasan_set_track+0x25/0x30 [ 51.280037] __kasan_slab_alloc+0x59/0x70 [ 51.280613] kmem_cache_alloc+0x16b/0x370 [ 51.281187] vm_area_dup+0x20/0x160 [ 51.281702] __split_vma+0x170/0x950 [ 51.282221] split_vma+0xc6/0x110 [ 51.282704] mprotect_fixup+0x8d2/0xb30 [ 51.283253] do_mprotect_pkey+0x87e/0xd40 [ 51.283828] __x64_sys_mprotect+0x78/0xc0 [ 51.284399] do_syscall_64+0x3f/0x90 [ 51.284920] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.285632] [ 51.285869] Freed by task 213: [ 51.286303] kasan_save_stack+0x22/0x50 [ 51.286859] kasan_set_track+0x25/0x30 [ 51.287402] kasan_save_free_info+0x2b/0x50 [ 51.287982] __kasan_slab_free+0x10a/0x190 [ 51.288552] kmem_cache_free+0x10d/0x4d0 [ 51.289103] rcu_core+0x8c8/0x2860 [ 51.289599] __do_softirq+0x1b7/0x7d4 [ 51.290114] [ 51.290345] Last potentially related work creation: [ 51.290979] kasan_save_stack+0x22/0x50 [ 51.291522] __kasan_record_aux_stack+0x8e/0xa0 [ 51.292137] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.292826] remove_vma+0x139/0x170 [ 51.293315] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.293949] do_vmi_munmap+0x1f1/0x2b0 [ 51.294471] __vm_munmap+0x138/0x3a0 [ 51.294971] __x64_sys_munmap+0x59/0x80 [ 51.295506] do_syscall_64+0x3f/0x90 [ 51.296012] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.296718] [ 51.296952] The buggy address belongs to the object at ffff8880102db0e8 [ 51.296952] which belongs to the cache vm_area_struct of size 168 [ 51.298549] The buggy address is located 88 bytes inside of [ 51.298549] freed 168-byte region [ffff8880102db0e8, ffff8880102db190) [ 51.300088] [ 51.300321] The buggy address belongs to the physical page: [ 51.301030] page:00000000174a1981 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102db [ 51.302242] memcg:ffff8880168acb01 [ 51.302706] flags: 0x100000000000200(slab|node=0|zone=1) [ 51.303412] page_type: 0xffffffff() [ 51.303906] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 51.304903] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880168acb01 [ 51.305888] page dumped because: kasan: bad access detected [ 51.306609] [ 51.306844] Memory state around the buggy address: [ 51.307477] ffff8880102db000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 51.308411] ffff8880102db080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 51.309339] >ffff8880102db100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.310253] ^ [ 51.310949] ffff8880102db180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 51.311877] ffff8880102db200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 51.312803] ================================================================== [ 51.313942] Disabling lock debugging due to kernel taint [ 53.459376] BUG: Bad rss-counter state mm:000000008d4e7070 type:MM_FILEPAGES val:33 [ 53.460562] BUG: Bad rss-counter state mm:000000008d4e7070 type:MM_ANONPAGES val:22 [ 53.857254] BUG: Bad rss-counter state mm:00000000acbe1682 type:MM_FILEPAGES val:33 [ 53.858233] BUG: Bad rss-counter state mm:00000000acbe1682 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5168' (ECDSA) to the list of known hosts. 2023/06/20 04:24:36 fuzzer started 2023/06/20 04:24:36 dialing manager at localhost:44161 2023/06/20 04:24:36 checking machine... 2023/06/20 04:24:36 checking revisions... [ 54.633086] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:24:36 testing simple program... [ 54.675146] cgroup: Unknown subsys name 'net' [ 54.711945] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:24:15 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f1655317c20 CR3=000000000983e000 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=2035333a34323a3430203032206e754a XMM01=6964206465766965636552203a5d3033 XMM02=6f63736964203a31313a323533373320 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a34323a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0a5900e RBX=ffffffff852c8058 RCX=0000000000000000 RDX=ffff88800d67b680 RSI=ffffffff81eec96a RDI=ffffffff852c8070 RBP=dffffc0000000000 RSP=ffff88801634fd50 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff8880192d9d80 R13=ffff88801929c758 R14=ffffffff84d2fa00 R15=ffff888008fcc000 RIP=ffffffff81eec979 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 00007fa1c33b8900 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=00007fa1c396f618 CR3=000000000dd98000 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