syzkaller login: [ 38.813581] BUG: Bad rss-counter state mm:0000000052a38e89 type:MM_FILEPAGES val:33 [ 38.814857] BUG: Bad rss-counter state mm:0000000052a38e89 type:MM_ANONPAGES val:22 [ 38.853910] ================================================================== [ 38.855088] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.856249] Read of size 8 at addr ffff888016ab5058 by task sshd/220 [ 38.857276] [ 38.857532] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.858593] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.859823] Call Trace: [ 38.860246] [ 38.860582] dump_stack_lvl+0x91/0xf0 [ 38.861187] print_report+0xcc/0x620 [ 38.861784] ? __virt_addr_valid+0x102/0x340 [ 38.862446] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.863146] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.863792] kasan_report+0xbe/0xf0 [ 38.864410] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.865052] vma_interval_tree_remove+0xc75/0xec0 [ 38.865657] vma_prepare+0xc54/0x11a0 [ 38.866138] __split_vma+0x5af/0x950 [ 38.866607] ? __pfx___split_vma+0x10/0x10 [ 38.867139] ? find_held_lock+0x2c/0x110 [ 38.867671] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.868261] ? lock_is_held_type+0x9f/0x120 [ 38.868808] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.869425] ? mtree_range_walk+0x632/0x900 [ 38.869995] ? mas_walk+0x5c7/0x7c0 [ 38.870468] do_vmi_munmap+0x1f1/0x2b0 [ 38.870965] mmap_region+0x1f9/0x2660 [ 38.871457] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.871975] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.872711] ? __pfx_lock_acquire+0x10/0x10 [ 38.873238] ? __pfx_mmap_region+0x10/0x10 [ 38.873764] ? security_mmap_addr+0x7d/0xa0 [ 38.874294] ? get_unmapped_area+0x1f5/0x3f0 [ 38.874847] do_mmap+0x854/0xf00 [ 38.875286] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.875780] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.876349] ksys_mmap_pgoff+0x3af/0x500 [ 38.876851] do_syscall_64+0x3f/0x90 [ 38.877326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.877972] RIP: 0033:0x7f63ca254d82 [ 38.878432] 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 [ 38.880573] RSP: 002b:00007fffb9ae2548 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.881484] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f63ca254d82 [ 38.882335] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f63c968e000 [ 38.883188] RBP: 00007f63c968e000 R08: 0000000000000009 R09: 0000000000001000 [ 38.884049] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e435222ec0 [ 38.884889] R13: 00007fffb9ae2560 R14: 00007fffb9ae2590 R15: 00007fffb9ae28f0 [ 38.885749] [ 38.886039] [ 38.886254] Allocated by task 213: [ 38.886683] kasan_save_stack+0x22/0x50 [ 38.887186] kasan_set_track+0x25/0x30 [ 38.887678] __kasan_slab_alloc+0x59/0x70 [ 38.888233] kmem_cache_alloc+0x16b/0x370 [ 38.888747] vm_area_dup+0x20/0x160 [ 38.889204] __split_vma+0x170/0x950 [ 38.889671] split_vma+0xc6/0x110 [ 38.890109] mprotect_fixup+0x8d2/0xb30 [ 38.890613] do_mprotect_pkey+0x87e/0xd40 [ 38.891140] __x64_sys_mprotect+0x78/0xc0 [ 38.891672] do_syscall_64+0x3f/0x90 [ 38.892159] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.892802] [ 38.893016] Freed by task 213: [ 38.893409] kasan_save_stack+0x22/0x50 [ 38.893908] kasan_set_track+0x25/0x30 [ 38.894401] kasan_save_free_info+0x2b/0x50 [ 38.894935] __kasan_slab_free+0x10a/0x190 [ 38.895476] kmem_cache_free+0x10d/0x4d0 [ 38.895997] rcu_core+0x8c8/0x2860 [ 38.896439] __do_softirq+0x1b7/0x7d4 [ 38.896913] [ 38.897129] Last potentially related work creation: [ 38.897720] kasan_save_stack+0x22/0x50 [ 38.898225] __kasan_record_aux_stack+0x8e/0xa0 [ 38.898880] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.899529] remove_vma+0x139/0x170 [ 38.899991] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.900552] do_vmi_munmap+0x1f1/0x2b0 [ 38.901042] __vm_munmap+0x138/0x3a0 [ 38.901512] __x64_sys_munmap+0x59/0x80 [ 38.902012] do_syscall_64+0x3f/0x90 [ 38.902493] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.903139] [ 38.903353] Second to last potentially related work creation: [ 38.904043] kasan_save_stack+0x22/0x50 [ 38.904552] __kasan_record_aux_stack+0x8e/0xa0 [ 38.905127] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.905776] remove_vma+0x139/0x170 [ 38.906227] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.906792] do_vmi_munmap+0x1f1/0x2b0 [ 38.907284] mmap_region+0x1f9/0x2660 [ 38.907758] do_mmap+0x854/0xf00 [ 38.908210] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.908704] ksys_mmap_pgoff+0x3af/0x500 [ 38.909216] do_syscall_64+0x3f/0x90 [ 38.909696] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.910332] [ 38.910552] The buggy address belongs to the object at ffff888016ab5000 [ 38.910552] which belongs to the cache vm_area_struct of size 168 [ 38.912042] The buggy address is located 88 bytes inside of [ 38.912042] freed 168-byte region [ffff888016ab5000, ffff888016ab50a8) [ 38.913452] [ 38.913672] The buggy address belongs to the physical page: [ 38.914337] page:000000000913e631 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ab5 [ 38.915434] memcg:ffff888014581501 [ 38.915863] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.916522] page_type: 0xffffffff() [ 38.916979] raw: 0100000000000200 ffff8880087a0c80 ffffea0000404840 dead000000000002 [ 38.917910] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014581501 [ 38.918812] page dumped because: kasan: bad access detected [ 38.919479] [ 38.919694] Memory state around the buggy address: [ 38.920312] ffff888016ab4f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 38.921173] ffff888016ab4f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.922040] >ffff888016ab5000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.922888] ^ [ 38.923627] ffff888016ab5080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 38.924487] ffff888016ab5100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.925352] ================================================================== [ 38.926325] Disabling lock debugging due to kernel taint [ 41.115531] BUG: Bad rss-counter state mm:00000000d6b42985 type:MM_FILEPAGES val:33 [ 41.116765] BUG: Bad rss-counter state mm:00000000d6b42985 type:MM_ANONPAGES val:22 [ 41.614270] BUG: Bad rss-counter state mm:000000002326ea08 type:MM_FILEPAGES val:33 [ 41.615218] BUG: Bad rss-counter state mm:000000002326ea08 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15239' (ECDSA) to the list of known hosts. 2023/06/20 15:56:12 fuzzer started 2023/06/20 15:56:12 dialing manager at localhost:36067 2023/06/20 15:56:12 checking machine... 2023/06/20 15:56:12 checking revisions... [ 42.364567] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:56:12 testing simple program... [ 42.415914] cgroup: Unknown subsys name 'net' [ 42.453128] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:56:12 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffc6d5a3dc8 CR3=0000000005482000 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=00007f6d741255100000556fd4dad790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=00000000000000f4 RCX=ffffffff8184cf55 RDX=ffff888017d49b40 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800d889ef4 RSP=ffff888017f5fb98 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=ffff88800d889e00 R13=0000000000000000 R14=0000000000000001 R15=ffff888019de6140 RIP=ffffffff814c086b RFL=00000202 [-------] 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 00007fc620c37900 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=00007ffde4496000 CR3=000000000d8da000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000