syzkaller login: [ 38.892648] BUG: Bad rss-counter state mm:00000000e1d2e74b type:MM_FILEPAGES val:33 [ 38.893390] BUG: Bad rss-counter state mm:00000000e1d2e74b type:MM_ANONPAGES val:22 [ 38.921799] ================================================================== [ 38.922627] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.923268] Read of size 8 at addr ffff88800fbfda50 by task sshd/219 [ 38.923776] [ 38.923917] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.924464] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.925206] Call Trace: [ 38.925415] [ 38.925604] dump_stack_lvl+0x91/0xf0 [ 38.925941] print_report+0xcc/0x620 [ 38.926360] ? __virt_addr_valid+0x102/0x340 [ 38.926743] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.927152] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.927567] kasan_report+0xbe/0xf0 [ 38.927870] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.928338] vma_interval_tree_remove+0xc75/0xec0 [ 38.928741] vma_prepare+0xc54/0x11a0 [ 38.929074] __split_vma+0x5af/0x950 [ 38.929392] ? __pfx___split_vma+0x10/0x10 [ 38.929746] ? find_held_lock+0x2c/0x110 [ 38.930100] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.930586] ? lock_is_held_type+0x9f/0x120 [ 38.930967] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.931389] ? mtree_range_walk+0x632/0x900 [ 38.931763] ? mas_walk+0x5c7/0x7c0 [ 38.932086] do_vmi_munmap+0x1f1/0x2b0 [ 38.932429] mmap_region+0x1f9/0x2660 [ 38.932758] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.933133] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.933627] ? __pfx_lock_acquire+0x10/0x10 [ 38.933993] ? __pfx_mmap_region+0x10/0x10 [ 38.934384] ? security_mmap_addr+0x7d/0xa0 [ 38.934737] ? get_unmapped_area+0x1f5/0x3f0 [ 38.935146] do_mmap+0x854/0xf00 [ 38.935462] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.935827] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.936246] ksys_mmap_pgoff+0x3af/0x500 [ 38.936587] do_syscall_64+0x3f/0x90 [ 38.936914] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.937365] RIP: 0033:0x7f2c6e946d82 [ 38.937672] 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 [ 38.939217] RSP: 002b:00007ffc8e93f188 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.939820] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2c6e946d82 [ 38.940394] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2c6dd80000 [ 38.940985] RBP: 00007f2c6dd80000 R08: 0000000000000009 R09: 0000000000001000 [ 38.941583] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d7dc80980 [ 38.942240] R13: 00007ffc8e93f1a0 R14: 00007ffc8e93f1d0 R15: 00007ffc8e93f530 [ 38.942842] [ 38.943055] [ 38.943212] Allocated by task 212: [ 38.943537] kasan_save_stack+0x22/0x50 [ 38.943896] kasan_set_track+0x25/0x30 [ 38.944239] __kasan_slab_alloc+0x59/0x70 [ 38.944595] kmem_cache_alloc+0x16b/0x370 [ 38.944948] vm_area_dup+0x20/0x160 [ 38.945268] __split_vma+0x170/0x950 [ 38.945605] split_vma+0xc6/0x110 [ 38.945915] mprotect_fixup+0x8d2/0xb30 [ 38.946312] do_mprotect_pkey+0x87e/0xd40 [ 38.946675] __x64_sys_mprotect+0x78/0xc0 [ 38.947034] do_syscall_64+0x3f/0x90 [ 38.947363] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.947832] [ 38.947987] Freed by task 212: [ 38.948268] kasan_save_stack+0x22/0x50 [ 38.948615] kasan_set_track+0x25/0x30 [ 38.948955] kasan_save_free_info+0x2b/0x50 [ 38.949325] __kasan_slab_free+0x10a/0x190 [ 38.949708] kmem_cache_free+0x10d/0x4d0 [ 38.950066] rcu_core+0x8c8/0x2860 [ 38.950416] __do_softirq+0x1b7/0x7d4 [ 38.950747] [ 38.950891] Last potentially related work creation: [ 38.951298] kasan_save_stack+0x22/0x50 [ 38.951650] __kasan_record_aux_stack+0x8e/0xa0 [ 38.952056] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.952507] remove_vma+0x139/0x170 [ 38.952820] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.953216] do_vmi_munmap+0x1f1/0x2b0 [ 38.953557] __vm_munmap+0x138/0x3a0 [ 38.953874] __x64_sys_munmap+0x59/0x80 [ 38.954273] do_syscall_64+0x3f/0x90 [ 38.954606] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.955059] [ 38.955216] The buggy address belongs to the object at ffff88800fbfd9f8 [ 38.955216] which belongs to the cache vm_area_struct of size 168 [ 38.956225] The buggy address is located 88 bytes inside of [ 38.956225] freed 168-byte region [ffff88800fbfd9f8, ffff88800fbfdaa0) [ 38.957199] [ 38.957350] The buggy address belongs to the physical page: [ 38.957811] page:0000000017a84c71 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfbfd [ 38.958584] memcg:ffff88800ebe7101 [ 38.958887] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.959352] page_type: 0xffffffff() [ 38.959670] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.960310] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebe7101 [ 38.960944] page dumped because: kasan: bad access detected [ 38.961412] [ 38.961569] Memory state around the buggy address: [ 38.961976] ffff88800fbfd900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.962638] ffff88800fbfd980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 38.963266] >ffff88800fbfda00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.963866] ^ [ 38.964377] ffff88800fbfda80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 38.964971] ffff88800fbfdb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.965608] ================================================================== [ 38.966455] Disabling lock debugging due to kernel taint [ 40.985976] BUG: Bad rss-counter state mm:0000000015d3c208 type:MM_FILEPAGES val:33 [ 40.986682] BUG: Bad rss-counter state mm:0000000015d3c208 type:MM_ANONPAGES val:22 [ 41.344120] BUG: Bad rss-counter state mm:00000000b8c47918 type:MM_FILEPAGES val:33 [ 41.344767] BUG: Bad rss-counter state mm:00000000b8c47918 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29303' (ECDSA) to the list of known hosts. 2023/06/21 09:27:46 fuzzer started 2023/06/21 09:27:46 dialing manager at localhost:36067 2023/06/21 09:27:46 checking machine... 2023/06/21 09:27:46 checking revisions... [ 41.938797] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:27:46 testing simple program... [ 41.977585] cgroup: Unknown subsys name 'net' [ 42.013672] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:27:46 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffff88806ce09b10 RDX=1ffff1100d9c1359 RSI=1ffff1100d9c1350 RDI=ffff88806ce09a70 RBP=ffff88806ce09ac8 RSP=ffff88806ce099b0 R8 =0000000000000000 R9 =0000000000000000 R10=ffff88806ce09a70 R11=00000000000b6a61 R12=ffffed100d9c1350 R13=ffffed100d9c134f R14=ffff88806ce09ab8 R15=ffff88806ce09a70 RIP=ffffffff8113062c 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 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=00007fd03ff02000 CR3=000000000ed40000 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=756e696c2d34365f3638782f62696c2f XMM01=732e637072697462696c2f756e672d78 XMM02=00332e6f732e637072697462696c2f75 XMM03=6e672d78756e696c2d34365f3638782f XMM04=00000000000000000000000000000000 XMM05=00007fd0403fef6000007fd0401e1f30 XMM06=00007fd0401e1a2000007fd0401e1510 XMM07=00007fd0401e100000007fd0403ffa20 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85deea28 RCX=ffffffff816cb7e9 RDX=0000000000000001 RSI=ffffffff86121d74 RDI=ffffffff85deea0c RBP=ffffffff85deea2c RSP=ffff88801471f2f8 R8 =ffffffff86121d74 R9 =ffff88801471f3f0 R10=0000000000038001 R11=000000000001d012 R12=ffffffff85deea30 R13=ffffffff85deea0c R14=ffffffff85deea28 R15=dffffc0000000000 RIP=ffffffff8112fc6e RFL=00000257 [---ZAPC] 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 00007f1ef0f4e900 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=00007f943ee63650 CR3=000000000d8e4000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=123baf47db17a74f00000000000ae988 XMM05=df54ea00cf20922f0000000000132fa0 XMM06=806171799158d9670000000000131a20 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000