syzkaller login: [ 31.021345] BUG: Bad rss-counter state mm:00000000678b5c26 type:MM_FILEPAGES val:33 [ 31.022331] BUG: Bad rss-counter state mm:00000000678b5c26 type:MM_ANONPAGES val:22 [ 31.182134] ================================================================== [ 31.182990] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.183884] Read of size 8 at addr ffff888016da5058 by task sshd/221 [ 31.184634] [ 31.184950] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.185765] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.186683] Call Trace: [ 31.186988] [ 31.187257] dump_stack_lvl+0x91/0xf0 [ 31.187731] print_report+0xcc/0x620 [ 31.188203] ? __virt_addr_valid+0x102/0x340 [ 31.188727] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.189309] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.189891] kasan_report+0xbe/0xf0 [ 31.190341] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.190924] vma_interval_tree_remove+0xc75/0xec0 [ 31.191489] vma_prepare+0xc54/0x11a0 [ 31.191942] __split_vma+0x5af/0x950 [ 31.192447] ? __pfx___split_vma+0x10/0x10 [ 31.192981] ? find_held_lock+0x2c/0x110 [ 31.193487] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.194045] ? lock_is_held_type+0x9f/0x120 [ 31.194584] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.195181] ? mtree_range_walk+0x632/0x900 [ 31.195730] ? mas_walk+0x5c7/0x7c0 [ 31.196226] do_vmi_munmap+0x1f1/0x2b0 [ 31.196716] mmap_region+0x1f9/0x2660 [ 31.197192] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.197705] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.198416] ? __pfx_lock_acquire+0x10/0x10 [ 31.198952] ? __pfx_mmap_region+0x10/0x10 [ 31.199476] ? security_mmap_addr+0x7d/0xa0 [ 31.200004] ? get_unmapped_area+0x1f5/0x3f0 [ 31.200640] do_mmap+0x854/0xf00 [ 31.201081] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.201574] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.202126] ksys_mmap_pgoff+0x3af/0x500 [ 31.202634] do_syscall_64+0x3f/0x90 [ 31.203105] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.203754] RIP: 0033:0x7f01212acd82 [ 31.204234] 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 [ 31.206325] RSP: 002b:00007ffc9afa1878 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.207222] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f01212acd82 [ 31.208055] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f01206e6000 [ 31.208911] RBP: 00007f01206e6000 R08: 0000000000000009 R09: 0000000000001000 [ 31.209754] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c2b7bc8980 [ 31.210600] R13: 00007ffc9afa1890 R14: 00007ffc9afa18c0 R15: 00007ffc9afa1c20 [ 31.211454] [ 31.211737] [ 31.211949] Allocated by task 214: [ 31.212389] kasan_save_stack+0x22/0x50 [ 31.212893] kasan_set_track+0x25/0x30 [ 31.213379] __kasan_slab_alloc+0x59/0x70 [ 31.213896] kmem_cache_alloc+0x16b/0x370 [ 31.214406] vm_area_dup+0x20/0x160 [ 31.214855] __split_vma+0x170/0x950 [ 31.215317] split_vma+0xc6/0x110 [ 31.215750] mprotect_fixup+0x8d2/0xb30 [ 31.216266] do_mprotect_pkey+0x87e/0xd40 [ 31.216788] __x64_sys_mprotect+0x78/0xc0 [ 31.217301] do_syscall_64+0x3f/0x90 [ 31.217774] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.218405] [ 31.218617] Freed by task 214: [ 31.219017] kasan_save_stack+0x22/0x50 [ 31.219518] kasan_set_track+0x25/0x30 [ 31.220005] kasan_save_free_info+0x2b/0x50 [ 31.220586] __kasan_slab_free+0x10a/0x190 [ 31.221115] kmem_cache_free+0x10d/0x4d0 [ 31.221621] rcu_core+0x8c8/0x2860 [ 31.222060] __do_softirq+0x1b7/0x7d4 [ 31.222538] [ 31.222755] Last potentially related work creation: [ 31.223336] kasan_save_stack+0x22/0x50 [ 31.223838] __kasan_record_aux_stack+0x8e/0xa0 [ 31.224430] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.225071] remove_vma+0x139/0x170 [ 31.225522] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.226076] do_vmi_munmap+0x1f1/0x2b0 [ 31.226551] __vm_munmap+0x138/0x3a0 [ 31.227010] __x64_sys_munmap+0x59/0x80 [ 31.227502] do_syscall_64+0x3f/0x90 [ 31.227967] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.228632] [ 31.228846] The buggy address belongs to the object at ffff888016da5000 [ 31.228846] which belongs to the cache vm_area_struct of size 168 [ 31.230309] The buggy address is located 88 bytes inside of [ 31.230309] freed 168-byte region [ffff888016da5000, ffff888016da50a8) [ 31.231706] [ 31.231919] The buggy address belongs to the physical page: [ 31.232607] page:000000000c5f0d96 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16da5 [ 31.233686] memcg:ffff8880093aa701 [ 31.234100] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.234739] page_type: 0xffffffff() [ 31.235181] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.236101] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880093aa701 [ 31.237045] page dumped because: kasan: bad access detected [ 31.237686] [ 31.237898] Memory state around the buggy address: [ 31.238460] ffff888016da4f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.239297] ffff888016da4f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.240138] >ffff888016da5000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.240990] ^ [ 31.241701] ffff888016da5080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.242541] ffff888016da5100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.243370] ================================================================== [ 31.244333] Disabling lock debugging due to kernel taint [ 33.682143] BUG: Bad rss-counter state mm:0000000004c16c1d type:MM_FILEPAGES val:33 [ 33.683322] BUG: Bad rss-counter state mm:0000000004c16c1d type:MM_ANONPAGES val:22 [ 34.089077] BUG: Bad rss-counter state mm:000000008fc167bd type:MM_FILEPAGES val:33 [ 34.090762] BUG: Bad rss-counter state mm:000000008fc167bd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4094' (ECDSA) to the list of known hosts. 2023/06/20 15:31:05 fuzzer started 2023/06/20 15:31:05 dialing manager at localhost:36067 2023/06/20 15:31:05 checking machine... 2023/06/20 15:31:05 checking revisions... [ 34.973516] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:31:05 testing simple program... [ 35.031377] cgroup: Unknown subsys name 'net' [ 35.081886] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:31:04 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888019cc2200 RCX=0000000000000000 RDX=0000000000000200 RSI=0000000000000000 RDI=ffffed1003398600 RBP=0000000000001000 RSP=ffff888019ebfcc8 R8 =ffff888019cc2200 R9 =0000000000000000 R10=ffffed1003398440 R11=0000000000000000 R12=ffff888019cc2200 R13=0000000000000cc0 R14=0000000000000000 R15=0000000000000cc0 RIP=ffffffff8451340a 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 00007fc41c65a900 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=00007fc41cc120b0 CR3=0000000018eda000 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=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007f4dbedb5b90 CR3=000000000ed06000 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=2034303a31333a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a31333a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000