syzkaller login: [ 33.329345] BUG: Bad rss-counter state mm:00000000f6c7f738 type:MM_FILEPAGES val:33 [ 33.330614] BUG: Bad rss-counter state mm:00000000f6c7f738 type:MM_ANONPAGES val:22 [ 33.372779] ================================================================== [ 33.373771] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.374699] Read of size 8 at addr ffff8880198384e0 by task sshd/222 [ 33.375469] [ 33.375677] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.376515] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.377478] Call Trace: [ 33.377783] [ 33.378059] dump_stack_lvl+0x91/0xf0 [ 33.378541] print_report+0xcc/0x620 [ 33.379013] ? __virt_addr_valid+0x102/0x340 [ 33.379541] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.380144] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.380737] kasan_report+0xbe/0xf0 [ 33.381199] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.381801] vma_interval_tree_remove+0xc75/0xec0 [ 33.382396] vma_prepare+0xc54/0x11a0 [ 33.382868] __split_vma+0x5af/0x950 [ 33.383319] ? __pfx___split_vma+0x10/0x10 [ 33.383840] ? find_held_lock+0x2c/0x110 [ 33.384338] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.384907] ? lock_is_held_type+0x9f/0x120 [ 33.385427] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.386041] ? mtree_range_walk+0x632/0x900 [ 33.386663] ? mas_walk+0x5c7/0x7c0 [ 33.387189] do_vmi_munmap+0x1f1/0x2b0 [ 33.387703] mmap_region+0x1f9/0x2660 [ 33.388206] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.388750] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.389525] ? __pfx_lock_acquire+0x10/0x10 [ 33.390091] ? __pfx_mmap_region+0x10/0x10 [ 33.390654] ? security_mmap_addr+0x7d/0xa0 [ 33.391215] ? get_unmapped_area+0x1f5/0x3f0 [ 33.391827] do_mmap+0x854/0xf00 [ 33.392313] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.392868] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.393489] ksys_mmap_pgoff+0x3af/0x500 [ 33.394027] do_syscall_64+0x3f/0x90 [ 33.394525] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.395210] RIP: 0033:0x7f98200b7d82 [ 33.395687] 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 [ 33.397952] RSP: 002b:00007ffcec694618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.398924] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f98200b7d82 [ 33.400008] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f981f4f1000 [ 33.400968] RBP: 00007f981f4f1000 R08: 0000000000000009 R09: 0000000000001000 [ 33.401888] R10: 0000000000000812 R11: 0000000000000206 R12: 00005622d17add90 [ 33.402805] R13: 00007ffcec694630 R14: 00007ffcec694660 R15: 00007ffcec6949c0 [ 33.403691] [ 33.404003] [ 33.404226] Allocated by task 215: [ 33.404675] kasan_save_stack+0x22/0x50 [ 33.405215] kasan_set_track+0x25/0x30 [ 33.405733] __kasan_slab_alloc+0x59/0x70 [ 33.406288] kmem_cache_alloc+0x16b/0x370 [ 33.406830] vm_area_dup+0x20/0x160 [ 33.407301] __split_vma+0x170/0x950 [ 33.407783] split_vma+0xc6/0x110 [ 33.408245] mprotect_fixup+0x8d2/0xb30 [ 33.408759] do_mprotect_pkey+0x87e/0xd40 [ 33.409335] __x64_sys_mprotect+0x78/0xc0 [ 33.409876] do_syscall_64+0x3f/0x90 [ 33.410373] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.411056] [ 33.411282] Freed by task 215: [ 33.411687] kasan_save_stack+0x22/0x50 [ 33.412225] kasan_set_track+0x25/0x30 [ 33.412750] kasan_save_free_info+0x2b/0x50 [ 33.413321] __kasan_slab_free+0x10a/0x190 [ 33.413892] kmem_cache_free+0x10d/0x4d0 [ 33.414421] rcu_core+0x8c8/0x2860 [ 33.414895] __do_softirq+0x1b7/0x7d4 [ 33.415392] [ 33.415616] Last potentially related work creation: [ 33.416239] kasan_save_stack+0x22/0x50 [ 33.416771] __kasan_record_aux_stack+0x8e/0xa0 [ 33.417408] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.418090] remove_vma+0x139/0x170 [ 33.418575] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.419158] do_vmi_munmap+0x1f1/0x2b0 [ 33.419665] __vm_munmap+0x138/0x3a0 [ 33.420166] __x64_sys_munmap+0x59/0x80 [ 33.420680] do_syscall_64+0x3f/0x90 [ 33.421200] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.421903] [ 33.422135] The buggy address belongs to the object at ffff888019838488 [ 33.422135] which belongs to the cache vm_area_struct of size 168 [ 33.423750] The buggy address is located 88 bytes inside of [ 33.423750] freed 168-byte region [ffff888019838488, ffff888019838530) [ 33.425331] [ 33.425561] The buggy address belongs to the physical page: [ 33.426312] page:00000000dc40bc05 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19838 [ 33.427513] memcg:ffff8880097f5901 [ 33.427974] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.428686] page_type: 0xffffffff() [ 33.429184] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.430196] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097f5901 [ 33.431199] page dumped because: kasan: bad access detected [ 33.431928] [ 33.432165] Memory state around the buggy address: [ 33.432832] ffff888019838380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.433860] ffff888019838400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 33.434854] >ffff888019838480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.435844] ^ [ 33.436711] ffff888019838500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 33.437709] ffff888019838580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.438689] ================================================================== [ 33.439900] Disabling lock debugging due to kernel taint [ 35.414744] BUG: Bad rss-counter state mm:000000007dc08252 type:MM_FILEPAGES val:33 [ 35.416348] BUG: Bad rss-counter state mm:000000007dc08252 type:MM_ANONPAGES val:22 [ 35.905549] BUG: Bad rss-counter state mm:00000000b7cbfa2e type:MM_FILEPAGES val:33 [ 35.906708] BUG: Bad rss-counter state mm:00000000b7cbfa2e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57366' (ECDSA) to the list of known hosts. 2023/06/19 17:08:21 fuzzer started 2023/06/19 17:08:22 dialing manager at localhost:44161 2023/06/19 17:08:22 checking machine... 2023/06/19 17:08:22 checking revisions... [ 36.644975] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:08:22 testing simple program... [ 36.696764] cgroup: Unknown subsys name 'net' [ 36.747000] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:08:19 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000007 RCX=0000000000000000 RDX=ffff8880145ab680 RSI=0000000000000002 RDI=0000000000000000 RBP=ffff88800ca6d740 RSP=ffff8880146f7e90 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000002 R13=0000000000000002 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c03b0 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4122ac5900 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=00007f4121f5aa50 CR3=0000000008db2000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=e008fc8a65e67e6800000000000ae988 XMM05=bbefc461a97ff1d20000000000135220 XMM06=db20f175d54767f000000000001342c0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000038000 RBX=0000000000000002 RCX=ffffffff8180f43a RDX=dffffc0000000000 RSI=00000000000080f4 RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86137542 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130754 RFL=00000283 [--S---C] 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 00007f374340e700 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=00007ffea6656000 CR3=0000000019e4c000 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=2031323a38303a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a38303a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000