syzkaller login: [ 37.287262] BUG: Bad rss-counter state mm:0000000048b7f99f type:MM_FILEPAGES val:33 [ 37.288431] BUG: Bad rss-counter state mm:0000000048b7f99f type:MM_ANONPAGES val:22 [ 37.329149] ================================================================== [ 37.330176] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.331140] Read of size 8 at addr ffff88800ea3b3f8 by task sshd/220 [ 37.332134] [ 37.332357] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.333220] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.334203] Call Trace: [ 37.334521] [ 37.334807] dump_stack_lvl+0x91/0xf0 [ 37.335307] print_report+0xcc/0x620 [ 37.335797] ? __virt_addr_valid+0x102/0x340 [ 37.336348] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.336966] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.337585] kasan_report+0xbe/0xf0 [ 37.338063] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.338698] vma_interval_tree_remove+0xc75/0xec0 [ 37.339315] vma_prepare+0xc54/0x11a0 [ 37.339795] __split_vma+0x5af/0x950 [ 37.340266] ? __pfx___split_vma+0x10/0x10 [ 37.340804] ? find_held_lock+0x2c/0x110 [ 37.341332] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.341899] ? lock_is_held_type+0x9f/0x120 [ 37.342443] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.343077] ? mtree_range_walk+0x632/0x900 [ 37.343636] ? mas_walk+0x5c7/0x7c0 [ 37.344114] do_vmi_munmap+0x1f1/0x2b0 [ 37.344617] mmap_region+0x1f9/0x2660 [ 37.345107] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.345636] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.346360] ? __pfx_lock_acquire+0x10/0x10 [ 37.346901] ? __pfx_mmap_region+0x10/0x10 [ 37.347444] ? security_mmap_addr+0x7d/0xa0 [ 37.347987] ? get_unmapped_area+0x1f5/0x3f0 [ 37.348547] do_mmap+0x854/0xf00 [ 37.348997] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.349492] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.350051] ksys_mmap_pgoff+0x3af/0x500 [ 37.350559] do_syscall_64+0x3f/0x90 [ 37.351057] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.351724] RIP: 0033:0x7f772e7bcd82 [ 37.352179] 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 [ 37.354322] RSP: 002b:00007ffdfdd66838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.355249] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f772e7bcd82 [ 37.356111] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f772dbf6000 [ 37.357001] RBP: 00007f772dbf6000 R08: 0000000000000009 R09: 0000000000001000 [ 37.357875] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f854550ec0 [ 37.358776] R13: 00007ffdfdd66850 R14: 00007ffdfdd66880 R15: 00007ffdfdd66be0 [ 37.359673] [ 37.359975] [ 37.360200] Allocated by task 213: [ 37.360648] kasan_save_stack+0x22/0x50 [ 37.361173] kasan_set_track+0x25/0x30 [ 37.361689] __kasan_slab_alloc+0x59/0x70 [ 37.362231] kmem_cache_alloc+0x16b/0x370 [ 37.362768] vm_area_dup+0x20/0x160 [ 37.363255] __split_vma+0x170/0x950 [ 37.363747] split_vma+0xc6/0x110 [ 37.364200] mprotect_fixup+0x8d2/0xb30 [ 37.364717] do_mprotect_pkey+0x87e/0xd40 [ 37.365256] __x64_sys_mprotect+0x78/0xc0 [ 37.365803] do_syscall_64+0x3f/0x90 [ 37.366294] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.366953] [ 37.367185] Freed by task 213: [ 37.367592] kasan_save_stack+0x22/0x50 [ 37.368112] kasan_set_track+0x25/0x30 [ 37.368631] kasan_save_free_info+0x2b/0x50 [ 37.369180] __kasan_slab_free+0x10a/0x190 [ 37.369739] kmem_cache_free+0x10d/0x4d0 [ 37.370270] rcu_core+0x8c8/0x2860 [ 37.370733] __do_softirq+0x1b7/0x7d4 [ 37.371243] [ 37.371463] Last potentially related work creation: [ 37.372065] kasan_save_stack+0x22/0x50 [ 37.372590] __kasan_record_aux_stack+0x8e/0xa0 [ 37.373183] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.373906] remove_vma+0x139/0x170 [ 37.374372] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.374969] do_vmi_munmap+0x1f1/0x2b0 [ 37.375477] __vm_munmap+0x138/0x3a0 [ 37.375962] __x64_sys_munmap+0x59/0x80 [ 37.376483] do_syscall_64+0x3f/0x90 [ 37.376978] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.377655] [ 37.377875] Second to last potentially related work creation: [ 37.378587] kasan_save_stack+0x22/0x50 [ 37.379124] __kasan_record_aux_stack+0x8e/0xa0 [ 37.379725] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.380395] remove_vma+0x139/0x170 [ 37.380865] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.381446] do_vmi_munmap+0x1f1/0x2b0 [ 37.381947] mmap_region+0x1f9/0x2660 [ 37.382439] do_mmap+0x854/0xf00 [ 37.382885] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.383410] ksys_mmap_pgoff+0x3af/0x500 [ 37.383938] do_syscall_64+0x3f/0x90 [ 37.384430] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.385096] [ 37.385320] The buggy address belongs to the object at ffff88800ea3b3a0 [ 37.385320] which belongs to the cache vm_area_struct of size 168 [ 37.386857] The buggy address is located 88 bytes inside of [ 37.386857] freed 168-byte region [ffff88800ea3b3a0, ffff88800ea3b448) [ 37.388342] [ 37.388565] The buggy address belongs to the physical page: [ 37.389258] page:00000000fd16baca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea3b [ 37.390401] memcg:ffff88800e448601 [ 37.390849] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.391531] page_type: 0xffffffff() [ 37.392002] raw: 0100000000000200 ffff88800879fc80 ffffea0000363840 dead000000000006 [ 37.392968] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e448601 [ 37.393915] page dumped because: kasan: bad access detected [ 37.394599] [ 37.394819] Memory state around the buggy address: [ 37.395439] ffff88800ea3b280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 37.396336] ffff88800ea3b300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 37.397229] >ffff88800ea3b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 37.398126] ^ [ 37.399019] ffff88800ea3b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 37.399920] ffff88800ea3b480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.400805] ================================================================== [ 37.401771] Disabling lock debugging due to kernel taint [ 39.449438] BUG: Bad rss-counter state mm:00000000dbea1d3b type:MM_FILEPAGES val:33 [ 39.450614] BUG: Bad rss-counter state mm:00000000dbea1d3b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14693' (ECDSA) to the list of known hosts. [ 39.940663] BUG: Bad rss-counter state mm:00000000d85b84c3 type:MM_FILEPAGES val:33 [ 39.941845] BUG: Bad rss-counter state mm:00000000d85b84c3 type:MM_ANONPAGES val:22 2023/06/19 17:46:00 fuzzer started 2023/06/19 17:46:00 dialing manager at localhost:44161 2023/06/19 17:46:00 checking machine... 2023/06/19 17:46:00 checking revisions... [ 40.534312] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:46:00 testing simple program... [ 40.578926] cgroup: Unknown subsys name 'net' [ 40.632312] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:45:52 Registers: info registers vcpu 0 RAX=ffffffff81370a3a RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110028dff43 RSI=ffffffff81370a3a RDI=ffff8880146ffa88 RBP=ffff8880146ffa58 RSP=ffff8880146ff9b8 R8 =0000000000000001 R9 =ffff8880146ffa00 R10=0000000000038001 R11=0000000000020ed0 R12=ffff8880146ffa88 R13=0000000000000000 R14=ffff888015e41b40 R15=ffff88800d895800 RIP=ffffffff813ad420 RFL=00000286 [--S--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 00007f221d50b900 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=00007f221dac2618 CR3=000000000d798000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=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=00007f70e8d7ff70 CR3=000000000c9fc000 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=35343a3731203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323634 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000