syzkaller login: [ 40.938809] BUG: Bad rss-counter state mm:000000001475c7ad type:MM_FILEPAGES val:33 [ 40.940310] BUG: Bad rss-counter state mm:000000001475c7ad type:MM_ANONPAGES val:22 [ 41.086646] ================================================================== [ 41.087579] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.088532] Read of size 8 at addr ffff88800e711a50 by task sshd/220 [ 41.089317] [ 41.089541] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.090577] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.091561] Call Trace: [ 41.091881] [ 41.092169] dump_stack_lvl+0x91/0xf0 [ 41.092662] print_report+0xcc/0x620 [ 41.093147] ? __virt_addr_valid+0x102/0x340 [ 41.093707] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.094361] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.094986] kasan_report+0xbe/0xf0 [ 41.095463] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.096103] vma_interval_tree_remove+0xc75/0xec0 [ 41.096727] vma_prepare+0xc54/0x11a0 [ 41.097214] __split_vma+0x5af/0x950 [ 41.097694] ? __pfx___split_vma+0x10/0x10 [ 41.098240] ? find_held_lock+0x2c/0x110 [ 41.098771] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.099344] ? lock_is_held_type+0x9f/0x120 [ 41.099898] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.100525] ? mtree_range_walk+0x632/0x900 [ 41.101087] ? mas_walk+0x5c7/0x7c0 [ 41.101568] do_vmi_munmap+0x1f1/0x2b0 [ 41.102072] mmap_region+0x1f9/0x2660 [ 41.102565] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.103086] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.103808] ? __pfx_lock_acquire+0x10/0x10 [ 41.104351] ? __pfx_mmap_region+0x10/0x10 [ 41.104896] ? security_mmap_addr+0x7d/0xa0 [ 41.105438] ? get_unmapped_area+0x1f5/0x3f0 [ 41.106011] do_mmap+0x854/0xf00 [ 41.106465] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.106966] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.107533] ksys_mmap_pgoff+0x3af/0x500 [ 41.108052] do_syscall_64+0x3f/0x90 [ 41.108543] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.109213] RIP: 0033:0x7fe3dc0e2d82 [ 41.109685] 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 [ 41.111812] RSP: 002b:00007ffe59875a78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.112740] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe3dc0e2d82 [ 41.113603] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe3db51c000 [ 41.114480] RBP: 00007fe3db51c000 R08: 0000000000000009 R09: 0000000000001000 [ 41.115341] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556999a3cb20 [ 41.116188] R13: 00007ffe59875a90 R14: 00007ffe59875ac0 R15: 00007ffe59875e20 [ 41.117059] [ 41.117351] [ 41.117569] Allocated by task 213: [ 41.118011] kasan_save_stack+0x22/0x50 [ 41.118522] kasan_set_track+0x25/0x30 [ 41.119025] __kasan_slab_alloc+0x59/0x70 [ 41.119549] kmem_cache_alloc+0x16b/0x370 [ 41.120069] vm_area_dup+0x20/0x160 [ 41.120533] __split_vma+0x170/0x950 [ 41.121010] split_vma+0xc6/0x110 [ 41.121456] mprotect_fixup+0x8d2/0xb30 [ 41.121976] do_mprotect_pkey+0x87e/0xd40 [ 41.122504] __x64_sys_mprotect+0x78/0xc0 [ 41.123031] do_syscall_64+0x3f/0x90 [ 41.123505] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.124151] [ 41.124370] Freed by task 213: [ 41.124761] kasan_save_stack+0x22/0x50 [ 41.125270] kasan_set_track+0x25/0x30 [ 41.125780] kasan_save_free_info+0x2b/0x50 [ 41.126318] __kasan_slab_free+0x10a/0x190 [ 41.126863] kmem_cache_free+0x10d/0x4d0 [ 41.127376] rcu_core+0x8c8/0x2860 [ 41.127832] __do_softirq+0x1b7/0x7d4 [ 41.128309] [ 41.128524] Last potentially related work creation: [ 41.129113] kasan_save_stack+0x22/0x50 [ 41.129612] __kasan_record_aux_stack+0x8e/0xa0 [ 41.130203] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.130845] remove_vma+0x139/0x170 [ 41.131378] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.131948] do_vmi_munmap+0x1f1/0x2b0 [ 41.132439] __vm_munmap+0x138/0x3a0 [ 41.132914] __x64_sys_munmap+0x59/0x80 [ 41.133429] do_syscall_64+0x3f/0x90 [ 41.133914] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.134565] [ 41.134783] Second to last potentially related work creation: [ 41.135472] kasan_save_stack+0x22/0x50 [ 41.135980] __kasan_record_aux_stack+0x8e/0xa0 [ 41.136555] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.137215] remove_vma+0x139/0x170 [ 41.137676] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.138274] do_vmi_munmap+0x1f1/0x2b0 [ 41.138779] mmap_region+0x1f9/0x2660 [ 41.139267] do_mmap+0x854/0xf00 [ 41.139706] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.140207] ksys_mmap_pgoff+0x3af/0x500 [ 41.140721] do_syscall_64+0x3f/0x90 [ 41.141201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.141855] [ 41.142075] The buggy address belongs to the object at ffff88800e7119f8 [ 41.142075] which belongs to the cache vm_area_struct of size 168 [ 41.143571] The buggy address is located 88 bytes inside of [ 41.143571] freed 168-byte region [ffff88800e7119f8, ffff88800e711aa0) [ 41.145009] [ 41.145231] The buggy address belongs to the physical page: [ 41.145910] page:00000000ea986d2b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe711 [ 41.147012] memcg:ffff88800e905001 [ 41.147447] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.148111] page_type: 0xffffffff() [ 41.148568] raw: 0100000000000200 ffff88800879fc80 ffffea0000326680 dead000000000004 [ 41.149510] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e905001 [ 41.150463] page dumped because: kasan: bad access detected [ 41.151139] [ 41.151358] Memory state around the buggy address: [ 41.151948] ffff88800e711900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.152810] ffff88800e711980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 41.153686] >ffff88800e711a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.154550] ^ [ 41.155257] ffff88800e711a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 41.156118] ffff88800e711b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.156976] ================================================================== [ 41.158019] Disabling lock debugging due to kernel taint [ 43.687812] BUG: Bad rss-counter state mm:0000000069d57210 type:MM_FILEPAGES val:33 [ 43.689004] BUG: Bad rss-counter state mm:0000000069d57210 type:MM_ANONPAGES val:22 [ 44.070858] BUG: Bad rss-counter state mm:00000000aec5d9bd type:MM_FILEPAGES val:33 [ 44.071969] BUG: Bad rss-counter state mm:00000000aec5d9bd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62862' (ECDSA) to the list of known hosts. 2023/06/19 23:32:20 fuzzer started 2023/06/19 23:32:20 dialing manager at localhost:44161 2023/06/19 23:32:20 checking machine... 2023/06/19 23:32:20 checking revisions... [ 44.794153] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:32:20 testing simple program... [ 44.832325] cgroup: Unknown subsys name 'net' [ 44.874037] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:32:18 Registers: info registers vcpu 0 RAX=1ffffffff0c26e01 RBX=0000000000000001 RCX=ffffffff86137004 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff888008d7f9e0 RBP=ffff888008d7f9d0 RSP=ffff888008d7f908 R8 =ffffffff86137008 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000020cb4 R12=ffff888008d7f9d8 R13=ffff888008d7f9c0 R14=ffff888008d7fd48 R15=ffff888008d7f978 RIP=ffffffff81131118 RFL=00000212 [----A--] 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=00007fc7acc70560 CR3=000000000fdf2000 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=736f6c63206e6f697463656e6e6f4300 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007f4c2637c6c7 RCX=ffffffff81007b62 RDX=ffff888016b68000 RSI=0000000000000001 RDI=0000000000000002 RBP=0000000000000001 RSP=ffff88800cb574b0 R8 =ffffffff864b9d5a R9 =ffff88800cb57570 R10=0000000000038001 R11=00000000000b6996 R12=ffff88800cb575f8 R13=0000000000000000 R14=ffff888016b68000 R15=ffff888008fd9d00 RIP=ffffffff814c0388 RFL=00000293 [--S-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 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=00007f4c262ed790 CR3=000000000c51a000 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=2030323a32333a3332203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a32333a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000