syzkaller login: [ 36.504714] BUG: Bad rss-counter state mm:00000000aa09a117 type:MM_FILEPAGES val:33 [ 36.506018] BUG: Bad rss-counter state mm:00000000aa09a117 type:MM_ANONPAGES val:22 [ 36.643350] ================================================================== [ 36.644081] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.644828] Read of size 8 at addr ffff8880158f0a50 by task sshd/221 [ 36.645444] [ 36.645701] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.646395] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.647164] Call Trace: [ 36.647414] [ 36.647636] dump_stack_lvl+0x91/0xf0 [ 36.648039] print_report+0xcc/0x620 [ 36.648418] ? __virt_addr_valid+0x102/0x340 [ 36.648853] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.649358] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.649841] kasan_report+0xbe/0xf0 [ 36.650232] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.650718] vma_interval_tree_remove+0xc75/0xec0 [ 36.651205] vma_prepare+0xc54/0x11a0 [ 36.651579] __split_vma+0x5af/0x950 [ 36.651952] ? __pfx___split_vma+0x10/0x10 [ 36.652374] ? find_held_lock+0x2c/0x110 [ 36.652783] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.653239] ? lock_is_held_type+0x9f/0x120 [ 36.653666] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.654183] ? mtree_range_walk+0x632/0x900 [ 36.654619] ? mas_walk+0x5c7/0x7c0 [ 36.655003] do_vmi_munmap+0x1f1/0x2b0 [ 36.655395] mmap_region+0x1f9/0x2660 [ 36.655777] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.656188] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.656750] ? __pfx_lock_acquire+0x10/0x10 [ 36.657179] ? __pfx_mmap_region+0x10/0x10 [ 36.657598] ? security_mmap_addr+0x7d/0xa0 [ 36.658026] ? get_unmapped_area+0x1f5/0x3f0 [ 36.658472] do_mmap+0x854/0xf00 [ 36.658821] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.659229] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.659677] ksys_mmap_pgoff+0x3af/0x500 [ 36.660093] do_syscall_64+0x3f/0x90 [ 36.660473] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.660992] RIP: 0033:0x7f3584d99d82 [ 36.661358] 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 [ 36.663059] RSP: 002b:00007fff06162468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.663772] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3584d99d82 [ 36.664469] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f35841d3000 [ 36.665145] RBP: 00007f35841d3000 R08: 0000000000000009 R09: 0000000000001000 [ 36.665806] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555aa5f0fec0 [ 36.666496] R13: 00007fff06162480 R14: 00007fff061624b0 R15: 00007fff06162810 [ 36.667185] [ 36.667416] [ 36.667584] Allocated by task 214: [ 36.667921] kasan_save_stack+0x22/0x50 [ 36.668337] kasan_set_track+0x25/0x30 [ 36.668726] __kasan_slab_alloc+0x59/0x70 [ 36.669145] kmem_cache_alloc+0x16b/0x370 [ 36.669551] vm_area_dup+0x20/0x160 [ 36.669909] __split_vma+0x170/0x950 [ 36.670294] split_vma+0xc6/0x110 [ 36.670641] mprotect_fixup+0x8d2/0xb30 [ 36.671050] do_mprotect_pkey+0x87e/0xd40 [ 36.671460] __x64_sys_mprotect+0x78/0xc0 [ 36.671869] do_syscall_64+0x3f/0x90 [ 36.672252] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.672763] [ 36.672935] Freed by task 214: [ 36.673257] kasan_save_stack+0x22/0x50 [ 36.673658] kasan_set_track+0x25/0x30 [ 36.674057] kasan_save_free_info+0x2b/0x50 [ 36.674498] __kasan_slab_free+0x10a/0x190 [ 36.674981] kmem_cache_free+0x10d/0x4d0 [ 36.675408] rcu_core+0x8c8/0x2860 [ 36.675758] __do_softirq+0x1b7/0x7d4 [ 36.676165] [ 36.676337] Last potentially related work creation: [ 36.676796] kasan_save_stack+0x22/0x50 [ 36.677221] __kasan_record_aux_stack+0x8e/0xa0 [ 36.677674] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.678205] remove_vma+0x139/0x170 [ 36.678561] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.679010] do_vmi_munmap+0x1f1/0x2b0 [ 36.679394] __vm_munmap+0x138/0x3a0 [ 36.679758] __x64_sys_munmap+0x59/0x80 [ 36.680164] do_syscall_64+0x3f/0x90 [ 36.680538] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.681046] [ 36.681216] The buggy address belongs to the object at ffff8880158f09f8 [ 36.681216] which belongs to the cache vm_area_struct of size 168 [ 36.682398] The buggy address is located 88 bytes inside of [ 36.682398] freed 168-byte region [ffff8880158f09f8, ffff8880158f0aa0) [ 36.683511] [ 36.683681] The buggy address belongs to the physical page: [ 36.684207] page:00000000fc376e54 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x158f0 [ 36.685074] memcg:ffff88801a3a9d01 [ 36.685411] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.685914] page_type: 0xffffffff() [ 36.686291] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.687033] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3a9d01 [ 36.687755] page dumped because: kasan: bad access detected [ 36.688289] [ 36.688461] Memory state around the buggy address: [ 36.688919] ffff8880158f0900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.689603] ffff8880158f0980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 36.690297] >ffff8880158f0a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.690969] ^ [ 36.691528] ffff8880158f0a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 36.692227] ffff8880158f0b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.692906] ================================================================== [ 36.693700] Disabling lock debugging due to kernel taint [ 38.758789] BUG: Bad rss-counter state mm:00000000ec0c0bed type:MM_FILEPAGES val:33 [ 38.759882] BUG: Bad rss-counter state mm:00000000ec0c0bed type:MM_ANONPAGES val:22 [ 39.304845] BUG: Bad rss-counter state mm:000000002ab6cec5 type:MM_FILEPAGES val:33 [ 39.305916] BUG: Bad rss-counter state mm:000000002ab6cec5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57039' (ECDSA) to the list of known hosts. 2023/06/20 00:21:45 fuzzer started 2023/06/20 00:21:45 dialing manager at localhost:44161 2023/06/20 00:21:46 checking machine... 2023/06/20 00:21:46 checking revisions... [ 40.106129] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:21:46 testing simple program... [ 40.159379] cgroup: Unknown subsys name 'net' [ 40.206948] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:21:40 Registers: info registers vcpu 0 RAX=ffffffff864b1159 RBX=0000000000000002 RCX=ffffffff864b1158 RDX=0000000000000000 RSI=0000000000000000 RDI=1ffffffff0c9622b RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864b115c R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b523e R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff888016fc7970 R15=ffff88806ce09a98 RIP=ffffffff81130e5e RFL=00000216 [----AP-] 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 00007f3cb5635900 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=000055cdee27f954 CR3=0000000016a5a000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f1d4fa7a000 CR3=000000000be78000 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=2035343a31323a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a31323a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000