syzkaller login: [ 30.986249] BUG: Bad rss-counter state mm:000000004f6dc9eb type:MM_FILEPAGES val:33 [ 30.987493] BUG: Bad rss-counter state mm:000000004f6dc9eb type:MM_ANONPAGES val:22 [ 31.141785] ================================================================== [ 31.142859] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.144097] Read of size 8 at addr ffff88800ecea228 by task sshd/220 [ 31.144997] [ 31.145262] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.146309] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.147287] Call Trace: [ 31.147611] [ 31.147893] dump_stack_lvl+0x91/0xf0 [ 31.148377] print_report+0xcc/0x620 [ 31.148856] ? __virt_addr_valid+0x102/0x340 [ 31.149423] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.150051] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.150671] kasan_report+0xbe/0xf0 [ 31.151149] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.151771] vma_interval_tree_remove+0xc75/0xec0 [ 31.152371] vma_prepare+0xc54/0x11a0 [ 31.152850] __split_vma+0x5af/0x950 [ 31.153328] ? __pfx___split_vma+0x10/0x10 [ 31.153857] ? find_held_lock+0x2c/0x110 [ 31.154383] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.154945] ? lock_is_held_type+0x9f/0x120 [ 31.155478] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.156080] ? mtree_range_walk+0x632/0x900 [ 31.156626] ? mas_walk+0x5c7/0x7c0 [ 31.157098] do_vmi_munmap+0x1f1/0x2b0 [ 31.157613] mmap_region+0x1f9/0x2660 [ 31.158093] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.158600] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.159314] ? __pfx_lock_acquire+0x10/0x10 [ 31.159849] ? __pfx_mmap_region+0x10/0x10 [ 31.160378] ? security_mmap_addr+0x7d/0xa0 [ 31.160903] ? get_unmapped_area+0x1f5/0x3f0 [ 31.161461] do_mmap+0x854/0xf00 [ 31.161900] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.162390] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.162949] ksys_mmap_pgoff+0x3af/0x500 [ 31.163451] do_syscall_64+0x3f/0x90 [ 31.163931] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.164576] RIP: 0033:0x7f0dce033d82 [ 31.165027] 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 [ 31.167166] RSP: 002b:00007ffdf82e6488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.168065] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0dce033d82 [ 31.168906] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0dcd46d000 [ 31.169773] RBP: 00007f0dcd46d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.170616] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558a4cd10d90 [ 31.171468] R13: 00007ffdf82e64a0 R14: 00007ffdf82e64d0 R15: 00007ffdf82e6830 [ 31.172326] [ 31.172614] [ 31.172832] Allocated by task 213: [ 31.173260] kasan_save_stack+0x22/0x50 [ 31.173770] kasan_set_track+0x25/0x30 [ 31.174261] __kasan_slab_alloc+0x59/0x70 [ 31.174783] kmem_cache_alloc+0x16b/0x370 [ 31.175300] vm_area_dup+0x20/0x160 [ 31.175758] __split_vma+0x170/0x950 [ 31.176222] split_vma+0xc6/0x110 [ 31.176660] mprotect_fixup+0x8d2/0xb30 [ 31.177158] do_mprotect_pkey+0x87e/0xd40 [ 31.177700] __x64_sys_mprotect+0x78/0xc0 [ 31.178219] do_syscall_64+0x3f/0x90 [ 31.178687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.179323] [ 31.179538] Freed by task 213: [ 31.179926] kasan_save_stack+0x22/0x50 [ 31.180429] kasan_set_track+0x25/0x30 [ 31.180920] kasan_save_free_info+0x2b/0x50 [ 31.181471] __kasan_slab_free+0x10a/0x190 [ 31.182009] kmem_cache_free+0x10d/0x4d0 [ 31.182512] rcu_core+0x8c8/0x2860 [ 31.182961] __do_softirq+0x1b7/0x7d4 [ 31.183440] [ 31.183653] Last potentially related work creation: [ 31.184235] kasan_save_stack+0x22/0x50 [ 31.184736] __kasan_record_aux_stack+0x8e/0xa0 [ 31.185398] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.186041] remove_vma+0x139/0x170 [ 31.186489] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.187046] do_vmi_munmap+0x1f1/0x2b0 [ 31.187541] __vm_munmap+0x138/0x3a0 [ 31.188011] __x64_sys_munmap+0x59/0x80 [ 31.188508] do_syscall_64+0x3f/0x90 [ 31.188977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.189626] [ 31.189841] The buggy address belongs to the object at ffff88800ecea1d0 [ 31.189841] which belongs to the cache vm_area_struct of size 168 [ 31.191312] The buggy address is located 88 bytes inside of [ 31.191312] freed 168-byte region [ffff88800ecea1d0, ffff88800ecea278) [ 31.192722] [ 31.192937] The buggy address belongs to the physical page: [ 31.193609] page:00000000d676fbbe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xecea [ 31.194689] memcg:ffff88800d967601 [ 31.195115] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.195755] page_type: 0xffffffff() [ 31.196208] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.197122] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d967601 [ 31.198048] page dumped because: kasan: bad access detected [ 31.198717] [ 31.198934] Memory state around the buggy address: [ 31.199514] ffff88800ecea100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.200365] ffff88800ecea180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.201226] >ffff88800ecea200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.202086] ^ [ 31.202643] ffff88800ecea280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.203504] ffff88800ecea300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.204352] ================================================================== [ 31.205429] Disabling lock debugging due to kernel taint [ 33.396164] BUG: Bad rss-counter state mm:000000000523dc07 type:MM_FILEPAGES val:33 [ 33.397254] BUG: Bad rss-counter state mm:000000000523dc07 type:MM_ANONPAGES val:22 [ 33.864167] BUG: Bad rss-counter state mm:00000000a6850766 type:MM_FILEPAGES val:33 [ 33.865322] BUG: Bad rss-counter state mm:00000000a6850766 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25472' (ECDSA) to the list of known hosts. 2023/06/20 03:37:28 fuzzer started 2023/06/20 03:37:28 dialing manager at localhost:44161 2023/06/20 03:37:28 checking machine... 2023/06/20 03:37:28 checking revisions... [ 34.587617] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:37:28 testing simple program... [ 34.629232] cgroup: Unknown subsys name 'net' [ 34.687308] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:37:27 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff83ab4217 RDX=ffff88801a141b40 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff888016867500 R8 =0000000000000000 R9 =fffffbfff0ff29c8 R10=ffffffff87f94e43 R11=0000099200000992 R12=0000000000000000 R13=0000000000000065 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff814c0388 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 00007fa1a7ad4900 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=00007ffd4fe4e000 CR3=0000000015afe000 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=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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f06a7f1e160 CR3=0000000016d2a000 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=2037323a37333a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a37333a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000