[ 32.163622] BUG: Bad rss-counter state mm:000000005344bc7f type:MM_FILEPAGES val:33 [ 32.165344] BUG: Bad rss-counter state mm:000000005344bc7f type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.324129] ================================================================== [ 32.325055] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.326058] Read of size 8 at addr ffff88800cbe9ed8 by task sshd/219 [ 32.327028] [ 32.327250] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.328149] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.329163] Call Trace: [ 32.329486] [ 32.329781] dump_stack_lvl+0x91/0xf0 [ 32.330289] print_report+0xcc/0x620 [ 32.330782] ? __virt_addr_valid+0x102/0x340 [ 32.331398] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.332044] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.332676] kasan_report+0xbe/0xf0 [ 32.333176] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.333813] vma_interval_tree_remove+0xc75/0xec0 [ 32.334427] vma_prepare+0xc54/0x11a0 [ 32.334937] __split_vma+0x5af/0x950 [ 32.335413] ? __pfx___split_vma+0x10/0x10 [ 32.335982] ? find_held_lock+0x2c/0x110 [ 32.336511] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.337109] ? lock_is_held_type+0x9f/0x120 [ 32.337656] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.338286] ? mtree_range_walk+0x632/0x900 [ 32.338867] ? mas_walk+0x5c7/0x7c0 [ 32.339355] do_vmi_munmap+0x1f1/0x2b0 [ 32.339863] mmap_region+0x1f9/0x2660 [ 32.340356] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.340898] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.341621] ? __pfx_lock_acquire+0x10/0x10 [ 32.342183] ? __pfx_mmap_region+0x10/0x10 [ 32.342727] ? security_mmap_addr+0x7d/0xa0 [ 32.343308] ? get_unmapped_area+0x1f5/0x3f0 [ 32.343881] do_mmap+0x854/0xf00 [ 32.344353] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.344876] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.345455] ksys_mmap_pgoff+0x3af/0x500 [ 32.345991] do_syscall_64+0x3f/0x90 [ 32.346481] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.347163] RIP: 0033:0x7f6389a48d82 [ 32.347626] 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 [ 32.349829] RSP: 002b:00007ffe3c289e58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.350801] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6389a48d82 [ 32.351714] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6388e82000 [ 32.352591] RBP: 00007f6388e82000 R08: 0000000000000009 R09: 0000000000001000 [ 32.353466] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563f6da8cec0 [ 32.354365] R13: 00007ffe3c289e70 R14: 00007ffe3c289ea0 R15: 00007ffe3c28a200 [ 32.355276] [ 32.355573] [ 32.355811] Allocated by task 212: [ 32.356271] kasan_save_stack+0x22/0x50 [ 32.356802] kasan_set_track+0x25/0x30 [ 32.357316] __kasan_slab_alloc+0x59/0x70 [ 32.357888] kmem_cache_alloc+0x16b/0x370 [ 32.358431] vm_area_dup+0x20/0x160 [ 32.358916] __split_vma+0x170/0x950 [ 32.359393] split_vma+0xc6/0x110 [ 32.359857] mprotect_fixup+0x8d2/0xb30 [ 32.360375] do_mprotect_pkey+0x87e/0xd40 [ 32.360936] __x64_sys_mprotect+0x78/0xc0 [ 32.361475] do_syscall_64+0x3f/0x90 [ 32.361976] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.362656] [ 32.362912] Freed by task 212: [ 32.363306] kasan_save_stack+0x22/0x50 [ 32.363829] kasan_set_track+0x25/0x30 [ 32.364332] kasan_save_free_info+0x2b/0x50 [ 32.364886] __kasan_slab_free+0x10a/0x190 [ 32.365437] kmem_cache_free+0x10d/0x4d0 [ 32.365967] rcu_core+0x8c8/0x2860 [ 32.366419] __do_softirq+0x1b7/0x7d4 [ 32.366924] [ 32.367143] Last potentially related work creation: [ 32.367737] kasan_save_stack+0x22/0x50 [ 32.368267] __kasan_record_aux_stack+0x8e/0xa0 [ 32.368865] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.369514] remove_vma+0x139/0x170 [ 32.369998] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.370569] do_vmi_munmap+0x1f1/0x2b0 [ 32.371116] __vm_munmap+0x138/0x3a0 [ 32.371592] __x64_sys_munmap+0x59/0x80 [ 32.372103] do_syscall_64+0x3f/0x90 [ 32.372580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.373234] [ 32.373451] The buggy address belongs to the object at ffff88800cbe9e80 [ 32.373451] which belongs to the cache vm_area_struct of size 168 [ 32.374973] The buggy address is located 88 bytes inside of [ 32.374973] freed 168-byte region [ffff88800cbe9e80, ffff88800cbe9f28) [ 32.376404] [ 32.376623] The buggy address belongs to the physical page: [ 32.377301] page:00000000d549606d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcbe9 [ 32.378399] memcg:ffff88800d014001 [ 32.378866] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.379513] page_type: 0xffffffff() [ 32.379981] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 32.380938] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d014001 [ 32.381851] page dumped because: kasan: bad access detected [ 32.382512] [ 32.382727] Memory state around the buggy address: [ 32.383325] ffff88800cbe9d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.384198] ffff88800cbe9e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.385069] >ffff88800cbe9e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.385951] ^ [ 32.386683] ffff88800cbe9f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 32.387583] ffff88800cbe9f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.388453] ================================================================== [ 32.389639] Disabling lock debugging due to kernel taint [ 34.160655] BUG: Bad rss-counter state mm:000000007b820ba0 type:MM_FILEPAGES val:33 [ 34.161583] BUG: Bad rss-counter state mm:000000007b820ba0 type:MM_ANONPAGES val:22 [ 34.616808] BUG: Bad rss-counter state mm:0000000094dd5f2d type:MM_FILEPAGES val:33 [ 34.618114] BUG: Bad rss-counter state mm:0000000094dd5f2d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3865' (ECDSA) to the list of known hosts. 2023/06/20 23:02:43 fuzzer started 2023/06/20 23:02:43 dialing manager at localhost:36067 2023/06/20 23:02:43 checking machine... 2023/06/20 23:02:43 checking revisions... [ 35.350360] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:02:43 testing simple program... [ 35.402394] cgroup: Unknown subsys name 'net' [ 35.438229] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:02:43 Registers: info registers vcpu 0 RAX=1ffffffff0bf49e9 RBX=ffffffff85fa4f4c RCX=ffffffff8363b5a6 RDX=0000000000000000 RSI=ffffffff863b353c RDI=ffffffff85fa4f3c RBP=ffffffff85fa4f3c RSP=ffff88800fd8f790 R8 =ffffffff863b353c R9 =ffff88800fd8f888 R10=0000000000038001 R11=000000000008a95e R12=ffffffff85fa4f5c R13=ffffffff85fa4f3c R14=ffffffff85fa4f3c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-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 00007f77449af900 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=00007ffdec084000 CR3=000000000c708000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fcbc10af8d0 CR3=000000000d9fc000 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=2033343a32303a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a32303a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000