syzkaller login: [ 69.133856] BUG: Bad rss-counter state mm:00000000c9ecd50d type:MM_FILEPAGES val:33 [ 69.135388] BUG: Bad rss-counter state mm:00000000c9ecd50d type:MM_ANONPAGES val:22 [ 69.288862] ================================================================== [ 69.289785] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 69.290730] Read of size 8 at addr ffff88800e3053f8 by task sshd/219 [ 69.291556] [ 69.291775] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 69.292750] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 69.293735] Call Trace: [ 69.294053] [ 69.294325] dump_stack_lvl+0x91/0xf0 [ 69.294809] print_report+0xcc/0x620 [ 69.295263] ? __virt_addr_valid+0x102/0x340 [ 69.295804] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.296384] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.296975] kasan_report+0xbe/0xf0 [ 69.297430] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.298073] vma_interval_tree_remove+0xc75/0xec0 [ 69.298664] vma_prepare+0xc54/0x11a0 [ 69.299114] __split_vma+0x5af/0x950 [ 69.299571] ? __pfx___split_vma+0x10/0x10 [ 69.300066] ? find_held_lock+0x2c/0x110 [ 69.300575] do_vmi_align_munmap+0x2ba/0x11f0 [ 69.301230] ? lock_is_held_type+0x9f/0x120 [ 69.301948] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 69.302780] ? mtree_range_walk+0x632/0x900 [ 69.303541] ? mas_walk+0x5c7/0x7c0 [ 69.304189] do_vmi_munmap+0x1f1/0x2b0 [ 69.304867] mmap_region+0x1f9/0x2660 [ 69.305527] ? vm_mmap_pgoff+0x15c/0x3a0 [ 69.306243] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 69.307065] ? __pfx_lock_acquire+0x10/0x10 [ 69.307623] ? __pfx_mmap_region+0x10/0x10 [ 69.308157] ? security_mmap_addr+0x7d/0xa0 [ 69.308692] ? get_unmapped_area+0x1f5/0x3f0 [ 69.309242] do_mmap+0x854/0xf00 [ 69.309715] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.310210] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 69.310793] ksys_mmap_pgoff+0x3af/0x500 [ 69.311300] do_syscall_64+0x3f/0x90 [ 69.311806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.312435] RIP: 0033:0x7fa0a6b5ad82 [ 69.312908] 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 [ 69.315067] RSP: 002b:00007ffcdffd48f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 69.316015] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa0a6b5ad82 [ 69.316889] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa0a5f94000 [ 69.317746] RBP: 00007fa0a5f94000 R08: 0000000000000009 R09: 0000000000001000 [ 69.318591] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a81164cec0 [ 69.319428] R13: 00007ffcdffd4910 R14: 00007ffcdffd4940 R15: 00007ffcdffd4ca0 [ 69.320309] [ 69.320615] [ 69.320829] Allocated by task 212: [ 69.321261] kasan_save_stack+0x22/0x50 [ 69.321806] kasan_set_track+0x25/0x30 [ 69.322294] __kasan_slab_alloc+0x59/0x70 [ 69.322859] kmem_cache_alloc+0x16b/0x370 [ 69.323375] vm_area_dup+0x20/0x160 [ 69.323857] __split_vma+0x170/0x950 [ 69.324316] split_vma+0xc6/0x110 [ 69.324781] mprotect_fixup+0x8d2/0xb30 [ 69.325282] do_mprotect_pkey+0x87e/0xd40 [ 69.325818] __x64_sys_mprotect+0x78/0xc0 [ 69.326335] do_syscall_64+0x3f/0x90 [ 69.326827] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.327462] [ 69.327694] Freed by task 13: [ 69.328084] kasan_save_stack+0x22/0x50 [ 69.328617] kasan_set_track+0x25/0x30 [ 69.329110] kasan_save_free_info+0x2b/0x50 [ 69.329742] __kasan_slab_free+0x10a/0x190 [ 69.330287] kmem_cache_free+0x10d/0x4d0 [ 69.330827] rcu_core+0x8c8/0x2860 [ 69.331275] __do_softirq+0x1b7/0x7d4 [ 69.331870] [ 69.332162] Last potentially related work creation: [ 69.332776] kasan_save_stack+0x22/0x50 [ 69.333280] __kasan_record_aux_stack+0x8e/0xa0 [ 69.333874] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.334560] remove_vma+0x139/0x170 [ 69.335020] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.335588] do_vmi_munmap+0x1f1/0x2b0 [ 69.336075] __vm_munmap+0x138/0x3a0 [ 69.336557] __x64_sys_munmap+0x59/0x80 [ 69.337061] do_syscall_64+0x3f/0x90 [ 69.337537] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.338194] [ 69.338404] Second to last potentially related work creation: [ 69.339109] kasan_save_stack+0x22/0x50 [ 69.339635] __kasan_record_aux_stack+0x8e/0xa0 [ 69.340196] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.340859] remove_vma+0x139/0x170 [ 69.341304] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.341886] do_vmi_munmap+0x1f1/0x2b0 [ 69.342374] mmap_region+0x1f9/0x2660 [ 69.342879] do_mmap+0x854/0xf00 [ 69.343316] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.343819] ksys_mmap_pgoff+0x3af/0x500 [ 69.344327] do_syscall_64+0x3f/0x90 [ 69.344816] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.345453] [ 69.345676] The buggy address belongs to the object at ffff88800e3053a0 [ 69.345676] which belongs to the cache vm_area_struct of size 168 [ 69.347188] The buggy address is located 88 bytes inside of [ 69.347188] freed 168-byte region [ffff88800e3053a0, ffff88800e305448) [ 69.348613] [ 69.348826] The buggy address belongs to the physical page: [ 69.349486] page:0000000037710475 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe305 [ 69.350589] memcg:ffff88800e1d4e01 [ 69.351013] flags: 0x100000000000200(slab|node=0|zone=1) [ 69.351662] page_type: 0xffffffff() [ 69.352107] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 69.353025] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1d4e01 [ 69.353950] page dumped because: kasan: bad access detected [ 69.354643] [ 69.354857] Memory state around the buggy address: [ 69.355428] ffff88800e305280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 69.356302] ffff88800e305300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 69.357160] >ffff88800e305380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 69.358034] ^ [ 69.358904] ffff88800e305400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 69.359771] ffff88800e305480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 69.360640] ================================================================== [ 69.361651] Disabling lock debugging due to kernel taint [ 71.245073] BUG: Bad rss-counter state mm:0000000041122ecb type:MM_FILEPAGES val:33 [ 71.246055] BUG: Bad rss-counter state mm:0000000041122ecb type:MM_ANONPAGES val:22 [ 71.713649] BUG: Bad rss-counter state mm:00000000dbdf8184 type:MM_FILEPAGES val:33 [ 71.714896] BUG: Bad rss-counter state mm:00000000dbdf8184 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55868' (ECDSA) to the list of known hosts. 2023/06/19 12:12:12 fuzzer started 2023/06/19 12:12:12 dialing manager at localhost:44161 2023/06/19 12:12:12 checking machine... 2023/06/19 12:12:12 checking revisions... [ 72.429192] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:12:12 testing simple program... [ 72.477108] cgroup: Unknown subsys name 'net' [ 72.524178] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:11:33 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86088c1a RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff86088c1e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130ad6 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 00007fa5e0667900 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=00007fff95ee3000 CR3=000000000d67a000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e 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 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=0000000000000001 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=00007f03149f9010 CR3=000000000dc9c000 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=2032313a32313a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a32313a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000