syzkaller login: [ 29.984377] BUG: Bad rss-counter state mm:000000006263ac6c type:MM_FILEPAGES val:33 [ 29.985826] BUG: Bad rss-counter state mm:000000006263ac6c type:MM_ANONPAGES val:22 [ 30.157936] ================================================================== [ 30.158836] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.159771] Read of size 8 at addr ffff88800e459140 by task sshd/220 [ 30.160547] [ 30.160828] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.161707] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.162681] Call Trace: [ 30.163102] [ 30.163452] dump_stack_lvl+0x91/0xf0 [ 30.164052] print_report+0xcc/0x620 [ 30.164640] ? __virt_addr_valid+0x102/0x340 [ 30.165303] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.166120] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.166908] kasan_report+0xbe/0xf0 [ 30.167489] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.168257] vma_interval_tree_remove+0xc75/0xec0 [ 30.168989] vma_prepare+0xc54/0x11a0 [ 30.169571] __split_vma+0x5af/0x950 [ 30.170138] ? __pfx___split_vma+0x10/0x10 [ 30.170773] ? find_held_lock+0x2c/0x110 [ 30.171511] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.172233] ? lock_is_held_type+0x9f/0x120 [ 30.172799] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.173425] ? mtree_range_walk+0x632/0x900 [ 30.174005] ? mas_walk+0x5c7/0x7c0 [ 30.174510] do_vmi_munmap+0x1f1/0x2b0 [ 30.175036] mmap_region+0x1f9/0x2660 [ 30.175553] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.176102] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.176960] ? __pfx_lock_acquire+0x10/0x10 [ 30.177533] ? __pfx_mmap_region+0x10/0x10 [ 30.178086] ? security_mmap_addr+0x7d/0xa0 [ 30.178636] ? get_unmapped_area+0x1f5/0x3f0 [ 30.179217] do_mmap+0x854/0xf00 [ 30.179684] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.180249] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.180879] ksys_mmap_pgoff+0x3af/0x500 [ 30.181513] do_syscall_64+0x3f/0x90 [ 30.182045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.182768] RIP: 0033:0x7f3af30d6d82 [ 30.183277] 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 [ 30.185670] RSP: 002b:00007ffc29a02af8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.186718] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3af30d6d82 [ 30.187667] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3af2510000 [ 30.188633] RBP: 00007f3af2510000 R08: 0000000000000009 R09: 0000000000001000 [ 30.189627] R10: 0000000000000812 R11: 0000000000000206 R12: 00005571755d0ec0 [ 30.190566] R13: 00007ffc29a02b10 R14: 00007ffc29a02b40 R15: 00007ffc29a02ea0 [ 30.191572] [ 30.191898] [ 30.192166] Allocated by task 213: [ 30.192634] kasan_save_stack+0x22/0x50 [ 30.193183] kasan_set_track+0x25/0x30 [ 30.193772] __kasan_slab_alloc+0x59/0x70 [ 30.194373] kmem_cache_alloc+0x16b/0x370 [ 30.194944] vm_area_dup+0x20/0x160 [ 30.195435] __split_vma+0x170/0x950 [ 30.196000] split_vma+0xc6/0x110 [ 30.196543] mprotect_fixup+0x8d2/0xb30 [ 30.197095] do_mprotect_pkey+0x87e/0xd40 [ 30.197677] __x64_sys_mprotect+0x78/0xc0 [ 30.198253] do_syscall_64+0x3f/0x90 [ 30.198863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.199774] [ 30.200091] Freed by task 213: [ 30.200651] kasan_save_stack+0x22/0x50 [ 30.201344] kasan_set_track+0x25/0x30 [ 30.201917] kasan_save_free_info+0x2b/0x50 [ 30.202551] __kasan_slab_free+0x10a/0x190 [ 30.203142] kmem_cache_free+0x10d/0x4d0 [ 30.203765] rcu_core+0x8c8/0x2860 [ 30.204319] __do_softirq+0x1b7/0x7d4 [ 30.204899] [ 30.205133] Last potentially related work creation: [ 30.205781] kasan_save_stack+0x22/0x50 [ 30.206342] __kasan_record_aux_stack+0x8e/0xa0 [ 30.207071] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.207803] remove_vma+0x139/0x170 [ 30.208344] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.208970] do_vmi_munmap+0x1f1/0x2b0 [ 30.209521] __vm_munmap+0x138/0x3a0 [ 30.210059] __x64_sys_munmap+0x59/0x80 [ 30.210622] do_syscall_64+0x3f/0x90 [ 30.211234] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.211998] [ 30.212255] The buggy address belongs to the object at ffff88800e4590e8 [ 30.212255] which belongs to the cache vm_area_struct of size 168 [ 30.214015] The buggy address is located 88 bytes inside of [ 30.214015] freed 168-byte region [ffff88800e4590e8, ffff88800e459190) [ 30.215557] [ 30.215784] The buggy address belongs to the physical page: [ 30.216536] page:000000002bc82bd4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe459 [ 30.217627] memcg:ffff88800f6cb401 [ 30.218060] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.218802] page_type: 0xffffffff() [ 30.219284] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.220259] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f6cb401 [ 30.221242] page dumped because: kasan: bad access detected [ 30.221935] [ 30.222163] Memory state around the buggy address: [ 30.222785] ffff88800e459000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.223769] ffff88800e459080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.224692] >ffff88800e459100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.225641] ^ [ 30.226294] ffff88800e459180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.227187] ffff88800e459200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.228097] ================================================================== [ 30.229097] Disabling lock debugging due to kernel taint [ 32.261343] BUG: Bad rss-counter state mm:00000000b4762a60 type:MM_FILEPAGES val:33 [ 32.262602] BUG: Bad rss-counter state mm:00000000b4762a60 type:MM_ANONPAGES val:22 [ 32.716332] BUG: Bad rss-counter state mm:00000000486718e5 type:MM_FILEPAGES val:33 [ 32.717241] BUG: Bad rss-counter state mm:00000000486718e5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54179' (ECDSA) to the list of known hosts. 2023/06/20 15:55:58 fuzzer started 2023/06/20 15:55:58 dialing manager at localhost:36067 2023/06/20 15:55:58 checking machine... 2023/06/20 15:55:58 checking revisions... [ 33.455998] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:55:58 testing simple program... [ 33.498795] cgroup: Unknown subsys name 'net' [ 33.538151] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:55:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016932140 RCX=0000000000000000 RDX=ffff888015da8000 RSI=ffffffff8181f7ef RDI=ffff888016932140 RBP=0000000000000040 RSP=ffff88800b87f8b0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000001 R13=0000000000000040 R14=ffff888016932140 R15=ffff88806ce361c8 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 00007f558dfca900 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=00007f558e5820b0 CR3=000000000e228000 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=00007ffc408585e8 CR3=000000000b328000 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=2037353a35353a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a35353a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000