syzkaller login: [ 30.293076] BUG: Bad rss-counter state mm:000000003521f019 type:MM_FILEPAGES val:33 [ 30.294265] BUG: Bad rss-counter state mm:000000003521f019 type:MM_ANONPAGES val:22 [ 30.328958] ================================================================== [ 30.330267] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.331350] Read of size 8 at addr ffff8880102663f8 by task sshd/220 [ 30.332252] [ 30.332488] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.333469] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.334471] Call Trace: [ 30.334792] [ 30.335089] dump_stack_lvl+0x91/0xf0 [ 30.335677] print_report+0xcc/0x620 [ 30.336256] ? __virt_addr_valid+0x102/0x340 [ 30.336933] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.337627] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.338352] kasan_report+0xbe/0xf0 [ 30.338909] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.339654] vma_interval_tree_remove+0xc75/0xec0 [ 30.340272] vma_prepare+0xc54/0x11a0 [ 30.340815] __split_vma+0x5af/0x950 [ 30.341296] ? __pfx___split_vma+0x10/0x10 [ 30.341832] ? find_held_lock+0x2c/0x110 [ 30.342395] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.343001] ? lock_is_held_type+0x9f/0x120 [ 30.343541] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.344171] ? mtree_range_walk+0x632/0x900 [ 30.344729] ? mas_walk+0x5c7/0x7c0 [ 30.345217] do_vmi_munmap+0x1f1/0x2b0 [ 30.345712] mmap_region+0x1f9/0x2660 [ 30.346208] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.346818] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.347614] ? __pfx_lock_acquire+0x10/0x10 [ 30.348147] ? __pfx_mmap_region+0x10/0x10 [ 30.348687] ? security_mmap_addr+0x7d/0xa0 [ 30.349227] ? get_unmapped_area+0x1f5/0x3f0 [ 30.349821] do_mmap+0x854/0xf00 [ 30.350371] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.350885] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.351447] ksys_mmap_pgoff+0x3af/0x500 [ 30.351962] do_syscall_64+0x3f/0x90 [ 30.352446] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.353144] RIP: 0033:0x7f9e4048fd82 [ 30.353701] 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 [ 30.355886] RSP: 002b:00007ffd53bba288 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.356970] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9e4048fd82 [ 30.358060] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9e3f8c9000 [ 30.358968] RBP: 00007f9e3f8c9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.359843] R10: 0000000000000812 R11: 0000000000000206 R12: 000056278aa95b20 [ 30.360753] R13: 00007ffd53bba2a0 R14: 00007ffd53bba2d0 R15: 00007ffd53bba630 [ 30.361662] [ 30.361967] [ 30.362206] Allocated by task 213: [ 30.362697] kasan_save_stack+0x22/0x50 [ 30.363224] kasan_set_track+0x25/0x30 [ 30.363733] __kasan_slab_alloc+0x59/0x70 [ 30.364308] kmem_cache_alloc+0x16b/0x370 [ 30.364838] vm_area_dup+0x20/0x160 [ 30.365305] __split_vma+0x170/0x950 [ 30.365823] split_vma+0xc6/0x110 [ 30.366277] mprotect_fixup+0x8d2/0xb30 [ 30.366832] do_mprotect_pkey+0x87e/0xd40 [ 30.367366] __x64_sys_mprotect+0x78/0xc0 [ 30.367907] do_syscall_64+0x3f/0x90 [ 30.368387] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.369083] [ 30.369298] Freed by task 213: [ 30.369698] kasan_save_stack+0x22/0x50 [ 30.370207] kasan_set_track+0x25/0x30 [ 30.370762] kasan_save_free_info+0x2b/0x50 [ 30.371298] __kasan_slab_free+0x10a/0x190 [ 30.371839] kmem_cache_free+0x10d/0x4d0 [ 30.372392] rcu_core+0x8c8/0x2860 [ 30.372895] __do_softirq+0x1b7/0x7d4 [ 30.373387] [ 30.373603] Last potentially related work creation: [ 30.374241] kasan_save_stack+0x22/0x50 [ 30.374775] __kasan_record_aux_stack+0x8e/0xa0 [ 30.375364] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.376045] remove_vma+0x139/0x170 [ 30.376502] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.377075] do_vmi_munmap+0x1f1/0x2b0 [ 30.377568] __vm_munmap+0x138/0x3a0 [ 30.378038] __x64_sys_munmap+0x59/0x80 [ 30.378557] do_syscall_64+0x3f/0x90 [ 30.379039] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.379690] [ 30.379911] The buggy address belongs to the object at ffff8880102663a0 [ 30.379911] which belongs to the cache vm_area_struct of size 168 [ 30.381424] The buggy address is located 88 bytes inside of [ 30.381424] freed 168-byte region [ffff8880102663a0, ffff888010266448) [ 30.383003] [ 30.383296] The buggy address belongs to the physical page: [ 30.384041] page:00000000d923cc5b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10266 [ 30.385200] memcg:ffff888019923f01 [ 30.385634] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.386345] page_type: 0xffffffff() [ 30.386812] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.387796] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019923f01 [ 30.388734] page dumped because: kasan: bad access detected [ 30.389462] [ 30.389678] Memory state around the buggy address: [ 30.390309] ffff888010266280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.391189] ffff888010266300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.392101] >ffff888010266380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.392966] ^ [ 30.393882] ffff888010266400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.394809] ffff888010266480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.395725] ================================================================== [ 30.396700] Disabling lock debugging due to kernel taint [ 32.742546] BUG: Bad rss-counter state mm:0000000051db97a9 type:MM_FILEPAGES val:33 [ 32.743220] BUG: Bad rss-counter state mm:0000000051db97a9 type:MM_ANONPAGES val:22 [ 33.142136] BUG: Bad rss-counter state mm:00000000cc71da1a type:MM_FILEPAGES val:33 [ 33.142933] BUG: Bad rss-counter state mm:00000000cc71da1a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27242' (ECDSA) to the list of known hosts. 2023/06/21 03:37:32 fuzzer started 2023/06/21 03:37:32 dialing manager at localhost:36067 2023/06/21 03:37:32 checking machine... 2023/06/21 03:37:32 checking revisions... [ 33.810384] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:37:32 testing simple program... [ 33.856110] cgroup: Unknown subsys name 'net' [ 33.893981] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:37:32 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801a336278 RCX=ffffffff81141c1b RDX=ffff888019b051c0 RSI=0000000000000000 RDI=0000000000000005 RBP=800000001a7a1067 RSP=ffff88801a127b60 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=1ffff11003424f6d R13=800000001a7a1065 R14=0000000000000001 R15=0000000000000001 RIP=ffffffff814c0860 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7798aad900 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=00007f779964f968 CR3=000000000fc3c000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff860d2fdc RDX=1ffff1100d9e135c RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff860d2fe0 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000fdcc R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=0000000000000005 R15=ffff88806cf09a98 RIP=ffffffff81130b54 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 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=00007f9484570e98 CR3=000000000c9ee000 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=d650a098199f8c92c549936e577cda41 XMM02=2c67c8bc2e329bc3000000000011a238 XMM03=fb795ef6d65770560000000000121ae0 XMM04=89905e0f7277590f00000000000ae988 XMM05=19e9129bd510f2350000000000131968 XMM06=95c9579202c1b21e00000000001307d0 XMM07=e042d86d42eb936e0000000000121d60 XMM08=2f1b2dbebdad1620000000000011a298 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000