syzkaller login: [ 23.694295] BUG: Bad rss-counter state mm:00000000ab5a9597 type:MM_FILEPAGES val:33 [ 23.695575] BUG: Bad rss-counter state mm:00000000ab5a9597 type:MM_ANONPAGES val:22 [ 23.845934] ================================================================== [ 23.846899] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.847869] Read of size 8 at addr ffff888016c006b0 by task sshd/219 [ 23.848652] [ 23.848893] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.849989] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.851006] Call Trace: [ 23.851356] [ 23.851650] dump_stack_lvl+0x91/0xf0 [ 23.852163] print_report+0xcc/0x620 [ 23.852655] ? __virt_addr_valid+0x102/0x340 [ 23.853233] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.853901] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.854541] kasan_report+0xbe/0xf0 [ 23.855043] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.855678] vma_interval_tree_remove+0xc75/0xec0 [ 23.856308] vma_prepare+0xc54/0x11a0 [ 23.856796] __split_vma+0x5af/0x950 [ 23.857297] ? __pfx___split_vma+0x10/0x10 [ 23.857856] ? find_held_lock+0x2c/0x110 [ 23.858427] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.859019] ? lock_is_held_type+0x9f/0x120 [ 23.859571] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.860205] ? mtree_range_walk+0x632/0x900 [ 23.860760] ? mas_walk+0x5c7/0x7c0 [ 23.861266] do_vmi_munmap+0x1f1/0x2b0 [ 23.861767] mmap_region+0x1f9/0x2660 [ 23.862289] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.862808] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.863559] ? __pfx_lock_acquire+0x10/0x10 [ 23.864101] ? __pfx_mmap_region+0x10/0x10 [ 23.864670] ? security_mmap_addr+0x7d/0xa0 [ 23.865221] ? get_unmapped_area+0x1f5/0x3f0 [ 23.865814] do_mmap+0x854/0xf00 [ 23.866308] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.866817] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.867408] ksys_mmap_pgoff+0x3af/0x500 [ 23.867920] do_syscall_64+0x3f/0x90 [ 23.868413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.869074] RIP: 0033:0x7f849ad4dd82 [ 23.869581] 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 [ 23.871799] RSP: 002b:00007ffcabbb2408 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.872736] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f849ad4dd82 [ 23.873615] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f849a187000 [ 23.874491] RBP: 00007f849a187000 R08: 0000000000000009 R09: 0000000000001000 [ 23.875347] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ca280a1f70 [ 23.876211] R13: 00007ffcabbb2420 R14: 00007ffcabbb2450 R15: 00007ffcabbb27b0 [ 23.877091] [ 23.877395] [ 23.877631] Allocated by task 212: [ 23.878073] kasan_save_stack+0x22/0x50 [ 23.878598] kasan_set_track+0x25/0x30 [ 23.879096] __kasan_slab_alloc+0x59/0x70 [ 23.879650] kmem_cache_alloc+0x16b/0x370 [ 23.880171] vm_area_dup+0x20/0x160 [ 23.880650] __split_vma+0x170/0x950 [ 23.881123] split_vma+0xc6/0x110 [ 23.881585] mprotect_fixup+0x8d2/0xb30 [ 23.882111] do_mprotect_pkey+0x87e/0xd40 [ 23.882655] __x64_sys_mprotect+0x78/0xc0 [ 23.883182] do_syscall_64+0x3f/0x90 [ 23.883675] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.884370] [ 23.884588] Freed by task 212: [ 23.884996] kasan_save_stack+0x22/0x50 [ 23.885516] kasan_set_track+0x25/0x30 [ 23.886065] kasan_save_free_info+0x2b/0x50 [ 23.886606] __kasan_slab_free+0x10a/0x190 [ 23.887169] kmem_cache_free+0x10d/0x4d0 [ 23.887694] rcu_core+0x8c8/0x2860 [ 23.888150] __do_softirq+0x1b7/0x7d4 [ 23.888635] [ 23.888870] Last potentially related work creation: [ 23.889478] kasan_save_stack+0x22/0x50 [ 23.890122] __kasan_record_aux_stack+0x8e/0xa0 [ 23.890713] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.891394] remove_vma+0x139/0x170 [ 23.891868] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.892440] do_vmi_munmap+0x1f1/0x2b0 [ 23.892955] __vm_munmap+0x138/0x3a0 [ 23.893500] __x64_sys_munmap+0x59/0x80 [ 23.894138] do_syscall_64+0x3f/0x90 [ 23.894676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.895345] [ 23.895566] The buggy address belongs to the object at ffff888016c00658 [ 23.895566] which belongs to the cache vm_area_struct of size 168 [ 23.897048] The buggy address is located 88 bytes inside of [ 23.897048] freed 168-byte region [ffff888016c00658, ffff888016c00700) [ 23.898539] [ 23.898761] The buggy address belongs to the physical page: [ 23.899452] page:00000000e157d97d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c00 [ 23.900594] memcg:ffff88801821d401 [ 23.901028] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.901699] page_type: 0xffffffff() [ 23.902170] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.903119] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801821d401 [ 23.904058] page dumped because: kasan: bad access detected [ 23.904737] [ 23.904960] Memory state around the buggy address: [ 23.905562] ffff888016c00580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.906485] ffff888016c00600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 23.907371] >ffff888016c00680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.908248] ^ [ 23.908853] ffff888016c00700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 23.909740] ffff888016c00780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 23.910621] ================================================================== [ 23.911705] Disabling lock debugging due to kernel taint [ 26.989864] BUG: Bad rss-counter state mm:00000000f974c3bc type:MM_FILEPAGES val:33 [ 26.991045] BUG: Bad rss-counter state mm:00000000f974c3bc type:MM_ANONPAGES val:22 [ 27.358684] BUG: Bad rss-counter state mm:00000000207bed5c type:MM_FILEPAGES val:33 [ 27.360457] BUG: Bad rss-counter state mm:00000000207bed5c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7955' (ECDSA) to the list of known hosts. 2023/06/20 14:37:40 fuzzer started 2023/06/20 14:37:40 dialing manager at localhost:36067 2023/06/20 14:37:40 checking machine... 2023/06/20 14:37:40 checking revisions... [ 28.111957] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:37:40 testing simple program... [ 28.162023] cgroup: Unknown subsys name 'net' [ 28.200972] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:37:40 Registers: info registers vcpu 0 RAX=1ffffffff0bb40fd RBX=ffffffff85da07e8 RCX=ffffffff811fc523 RDX=0000000000000000 RSI=ffffffff860aca3e RDI=ffffffff85da07e8 RBP=ffffffff85da07e8 RSP=ffff88800da4f9e0 R8 =ffffffff860aca3e R9 =ffff88800da4fad8 R10=0000000000038001 R11=0000000000009789 R12=ffffffff85da07e8 R13=ffffffff85da07e8 R14=ffffffff85da07e8 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 00007f685841b900 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=00007ffe7f6d2000 CR3=000000000db0c000 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=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 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=00007f6918bee890 CR3=0000000008ebc000 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=c4f93004cf88d380bb461cc9607ad206 XMM02=ec2efd57dc4c00df000000000011d340 XMM03=755d3c541a2029d2000000000011d410 XMM04=e6e8f8c28f456d8300000000000ae988 XMM05=fb13869b7045b2330000000000131fe8 XMM06=4fda316b135da52b0000000000130d18 XMM07=e042d86d42eb936e00000000001212d8 XMM08=755d3c541a2029d2000000000011d410 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000