syzkaller login: [ 30.190742] BUG: Bad rss-counter state mm:000000002df62a32 type:MM_FILEPAGES val:33 [ 30.192509] BUG: Bad rss-counter state mm:000000002df62a32 type:MM_ANONPAGES val:22 [ 30.360959] ================================================================== [ 30.361883] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.362827] Read of size 8 at addr ffff88800dd023f8 by task sshd/219 [ 30.363745] [ 30.363975] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.364851] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.365847] Call Trace: [ 30.366175] [ 30.366464] dump_stack_lvl+0x91/0xf0 [ 30.366961] print_report+0xcc/0x620 [ 30.367472] ? __virt_addr_valid+0x102/0x340 [ 30.368037] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.368686] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.369334] kasan_report+0xbe/0xf0 [ 30.369836] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.370514] vma_interval_tree_remove+0xc75/0xec0 [ 30.371200] vma_prepare+0xc54/0x11a0 [ 30.371737] __split_vma+0x5af/0x950 [ 30.372239] ? __pfx___split_vma+0x10/0x10 [ 30.372789] ? find_held_lock+0x2c/0x110 [ 30.373339] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.373933] ? lock_is_held_type+0x9f/0x120 [ 30.374500] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.375135] ? mtree_range_walk+0x632/0x900 [ 30.375728] ? mas_walk+0x5c7/0x7c0 [ 30.376228] do_vmi_munmap+0x1f1/0x2b0 [ 30.376755] mmap_region+0x1f9/0x2660 [ 30.377256] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.377790] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.378533] ? __pfx_lock_acquire+0x10/0x10 [ 30.379090] ? __pfx_mmap_region+0x10/0x10 [ 30.379674] ? security_mmap_addr+0x7d/0xa0 [ 30.380227] ? get_unmapped_area+0x1f5/0x3f0 [ 30.380804] do_mmap+0x854/0xf00 [ 30.381260] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.381776] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.382360] ksys_mmap_pgoff+0x3af/0x500 [ 30.382885] do_syscall_64+0x3f/0x90 [ 30.383391] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.384078] RIP: 0033:0x7fd6a12efd82 [ 30.384553] 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 [ 30.386783] RSP: 002b:00007ffcd95e8778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.387752] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd6a12efd82 [ 30.388633] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd6a0729000 [ 30.389515] RBP: 00007fd6a0729000 R08: 0000000000000009 R09: 0000000000001000 [ 30.390444] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557d24e57d90 [ 30.391489] R13: 00007ffcd95e8790 R14: 00007ffcd95e87c0 R15: 00007ffcd95e8b20 [ 30.392410] [ 30.392717] [ 30.392946] Allocated by task 212: [ 30.393391] kasan_save_stack+0x22/0x50 [ 30.393911] kasan_set_track+0x25/0x30 [ 30.394482] __kasan_slab_alloc+0x59/0x70 [ 30.395118] kmem_cache_alloc+0x16b/0x370 [ 30.395676] vm_area_dup+0x20/0x160 [ 30.396167] __split_vma+0x170/0x950 [ 30.396673] split_vma+0xc6/0x110 [ 30.397136] mprotect_fixup+0x8d2/0xb30 [ 30.397684] do_mprotect_pkey+0x87e/0xd40 [ 30.398288] __x64_sys_mprotect+0x78/0xc0 [ 30.398894] do_syscall_64+0x3f/0x90 [ 30.399464] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.400244] [ 30.400530] Freed by task 212: [ 30.401047] kasan_save_stack+0x22/0x50 [ 30.401635] kasan_set_track+0x25/0x30 [ 30.402172] kasan_save_free_info+0x2b/0x50 [ 30.402752] __kasan_slab_free+0x10a/0x190 [ 30.403328] kmem_cache_free+0x10d/0x4d0 [ 30.403902] rcu_core+0x8c8/0x2860 [ 30.404349] __do_softirq+0x1b7/0x7d4 [ 30.404836] [ 30.405126] Last potentially related work creation: [ 30.405713] kasan_save_stack+0x22/0x50 [ 30.406217] __kasan_record_aux_stack+0x8e/0xa0 [ 30.406787] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.407453] remove_vma+0x139/0x170 [ 30.407899] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.408446] do_vmi_munmap+0x1f1/0x2b0 [ 30.408928] __vm_munmap+0x138/0x3a0 [ 30.409389] __x64_sys_munmap+0x59/0x80 [ 30.409876] do_syscall_64+0x3f/0x90 [ 30.410343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.411062] [ 30.411304] The buggy address belongs to the object at ffff88800dd023a0 [ 30.411304] which belongs to the cache vm_area_struct of size 168 [ 30.412770] The buggy address is located 88 bytes inside of [ 30.412770] freed 168-byte region [ffff88800dd023a0, ffff88800dd02448) [ 30.414343] [ 30.414568] The buggy address belongs to the physical page: [ 30.415314] page:000000008940211a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd02 [ 30.416717] memcg:ffff88800e98a801 [ 30.417238] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.417978] page_type: 0xffffffff() [ 30.418488] raw: 0100000000000200 ffff8880087a0c80 ffffea0000674100 dead000000000008 [ 30.419528] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e98a801 [ 30.420553] page dumped because: kasan: bad access detected [ 30.421255] [ 30.421487] Memory state around the buggy address: [ 30.422082] ffff88800dd02280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.422996] ffff88800dd02300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.423880] >ffff88800dd02380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.424778] ^ [ 30.425806] ffff88800dd02400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.426762] ffff88800dd02480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.427690] ================================================================== [ 30.428700] Disabling lock debugging due to kernel taint [ 32.371266] BUG: Bad rss-counter state mm:00000000755c5133 type:MM_FILEPAGES val:33 [ 32.372114] BUG: Bad rss-counter state mm:00000000755c5133 type:MM_ANONPAGES val:22 [ 32.806103] BUG: Bad rss-counter state mm:00000000065920f7 type:MM_FILEPAGES val:33 [ 32.806941] BUG: Bad rss-counter state mm:00000000065920f7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32258' (ECDSA) to the list of known hosts. 2023/06/21 02:05:32 fuzzer started 2023/06/21 02:05:33 dialing manager at localhost:36067 2023/06/21 02:05:33 checking machine... 2023/06/21 02:05:33 checking revisions... [ 33.539222] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:05:33 testing simple program... [ 33.591382] cgroup: Unknown subsys name 'net' [ 33.638137] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:05:32 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffff888016c6f368 RDX=1ffff11002d8de62 RSI=ffff888016c6f298 RDI=ffff888016c6f2c8 RBP=ffff888016c6f320 RSP=ffff888016c6f208 R8 =0000000000000001 R9 =ffff888016c6f308 R10=0000000000038001 R11=0000000000006097 R12=ffffed1002d8de5b R13=ffff888016c6f310 R14=ffff888016c6f310 R15=ffff888016c6f2c8 RIP=ffffffff81130653 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 00007f4ef0ae3900 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=00007f4eefef9d30 CR3=000000000d872000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d2e839f17a96af2300000000000ae988 XMM05=0608842446e725180000000000132ca8 XMM06=806171799158d9670000000000131d48 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000fffffff9 RBX=000000000000000c RCX=000000000000001b RDX=00007fb2fd669f7b RSI=00007fb2fd669c12 RDI=00007fb2fd669f60 RBP=00007fb2fd669f7b RSP=00007ffcf42898e8 R8 =000055ea792d3030 R9 =0000000000000000 R10=00007fb2fdbe0e10 R11=000000000000000b R12=0000000000800204 R13=000055ea792ad778 R14=000000000000000b R15=00007fb2fd66c740 RIP=00007fb2fdbe1afb 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 00007fb2fd68e900 00000000 00000000 GS =0000 0000000000000000 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=00007ffcf4284000 CR3=0000000008c7e000 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=0000ff00000000ff00000000ff000000 XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000