syzkaller login: [ 30.142274] BUG: Bad rss-counter state mm:00000000c58ef494 type:MM_FILEPAGES val:33 [ 30.143291] BUG: Bad rss-counter state mm:00000000c58ef494 type:MM_ANONPAGES val:22 [ 30.313655] ================================================================== [ 30.314625] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.315633] Read of size 8 at addr ffff888019fcf058 by task sshd/222 [ 30.316553] [ 30.316799] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.317722] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.318781] Call Trace: [ 30.319128] [ 30.319430] dump_stack_lvl+0x91/0xf0 [ 30.319961] print_report+0xcc/0x620 [ 30.320476] ? __virt_addr_valid+0x102/0x340 [ 30.321093] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.321754] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.322415] kasan_report+0xbe/0xf0 [ 30.322928] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.323613] vma_interval_tree_remove+0xc75/0xec0 [ 30.324288] vma_prepare+0xc54/0x11a0 [ 30.324824] __split_vma+0x5af/0x950 [ 30.325345] ? __pfx___split_vma+0x10/0x10 [ 30.325941] ? find_held_lock+0x2c/0x110 [ 30.326522] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.327159] ? lock_is_held_type+0x9f/0x120 [ 30.327760] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.328428] ? mtree_range_walk+0x632/0x900 [ 30.329054] ? mas_walk+0x5c7/0x7c0 [ 30.329577] do_vmi_munmap+0x1f1/0x2b0 [ 30.330119] mmap_region+0x1f9/0x2660 [ 30.330663] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.331230] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.332017] ? __pfx_lock_acquire+0x10/0x10 [ 30.332626] ? __pfx_mmap_region+0x10/0x10 [ 30.333214] ? security_mmap_addr+0x7d/0xa0 [ 30.333812] ? get_unmapped_area+0x1f5/0x3f0 [ 30.334423] do_mmap+0x854/0xf00 [ 30.334913] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.335455] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.336057] ksys_mmap_pgoff+0x3af/0x500 [ 30.336643] do_syscall_64+0x3f/0x90 [ 30.337176] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.337898] RIP: 0033:0x7efeb4b7ad82 [ 30.338397] 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 [ 30.340795] RSP: 002b:00007ffdb22ab0d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.341790] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efeb4b7ad82 [ 30.342730] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efeb3fb4000 [ 30.343673] RBP: 00007efeb3fb4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.344636] R10: 0000000000000812 R11: 0000000000000206 R12: 000055593d290d90 [ 30.345580] R13: 00007ffdb22ab0f0 R14: 00007ffdb22ab120 R15: 00007ffdb22ab480 [ 30.346542] [ 30.346866] [ 30.347104] Allocated by task 214: [ 30.347578] kasan_save_stack+0x22/0x50 [ 30.348147] kasan_set_track+0x25/0x30 [ 30.348708] __kasan_slab_alloc+0x59/0x70 [ 30.349283] kmem_cache_alloc+0x16b/0x370 [ 30.349857] vm_area_dup+0x20/0x160 [ 30.350361] __split_vma+0x170/0x950 [ 30.350875] split_vma+0xc6/0x110 [ 30.351369] mprotect_fixup+0x8d2/0xb30 [ 30.351928] do_mprotect_pkey+0x87e/0xd40 [ 30.352498] __x64_sys_mprotect+0x78/0xc0 [ 30.353107] do_syscall_64+0x3f/0x90 [ 30.353630] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.354346] [ 30.354590] Freed by task 214: [ 30.355030] kasan_save_stack+0x22/0x50 [ 30.355596] kasan_set_track+0x25/0x30 [ 30.356145] kasan_save_free_info+0x2b/0x50 [ 30.356749] __kasan_slab_free+0x10a/0x190 [ 30.357338] kmem_cache_free+0x10d/0x4d0 [ 30.357900] rcu_core+0x8c8/0x2860 [ 30.358389] __do_softirq+0x1b7/0x7d4 [ 30.358918] [ 30.359157] Last potentially related work creation: [ 30.359806] kasan_save_stack+0x22/0x50 [ 30.360373] __kasan_record_aux_stack+0x8e/0xa0 [ 30.361027] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.361741] remove_vma+0x139/0x170 [ 30.362249] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.362873] do_vmi_munmap+0x1f1/0x2b0 [ 30.363414] __vm_munmap+0x138/0x3a0 [ 30.363929] __x64_sys_munmap+0x59/0x80 [ 30.364486] do_syscall_64+0x3f/0x90 [ 30.365028] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.365733] [ 30.365967] The buggy address belongs to the object at ffff888019fcf000 [ 30.365967] which belongs to the cache vm_area_struct of size 168 [ 30.367592] The buggy address is located 88 bytes inside of [ 30.367592] freed 168-byte region [ffff888019fcf000, ffff888019fcf0a8) [ 30.369176] [ 30.369413] The buggy address belongs to the physical page: [ 30.370160] page:000000008a453b62 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19fcf [ 30.371379] memcg:ffff88801a9fc901 [ 30.371847] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.372575] page_type: 0xffffffff() [ 30.373088] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.374114] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a9fc901 [ 30.375127] page dumped because: kasan: bad access detected [ 30.375861] [ 30.376103] Memory state around the buggy address: [ 30.376750] ffff888019fcef00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.377707] ffff888019fcef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.378663] >ffff888019fcf000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.379609] ^ [ 30.380425] ffff888019fcf080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.381399] ffff888019fcf100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.382357] ================================================================== [ 30.383555] Disabling lock debugging due to kernel taint [ 32.292157] BUG: Bad rss-counter state mm:000000008ebb3cc2 type:MM_FILEPAGES val:33 [ 32.293545] BUG: Bad rss-counter state mm:000000008ebb3cc2 type:MM_ANONPAGES val:22 [ 32.748153] BUG: Bad rss-counter state mm:0000000016b91854 type:MM_FILEPAGES val:33 [ 32.749388] BUG: Bad rss-counter state mm:0000000016b91854 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34867' (ECDSA) to the list of known hosts. 2023/06/20 13:27:39 fuzzer started 2023/06/20 13:27:40 dialing manager at localhost:36067 2023/06/20 13:27:40 checking machine... 2023/06/20 13:27:40 checking revisions... [ 33.446607] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:27:40 testing simple program... [ 33.490597] cgroup: Unknown subsys name 'net' [ 33.541215] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:27:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801621aec0 RCX=0000000000000000 RDX=ffff888014609b40 RSI=ffffffff818dc886 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880176cfc48 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88801621b078 R13=0000000000000020 R14=ffff88801621af48 R15=ffff88801621af98 RIP=ffffffff814c089b 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 00007f3c84c20900 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=00007ffcb3f12000 CR3=000000001abc0000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=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=00007f51fc4e1c10 CR3=0000000009af8000 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=2039333a37323a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a37323a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000