syzkaller login: [ 31.008654] BUG: Bad rss-counter state mm:00000000a6707ec4 type:MM_FILEPAGES val:33 [ 31.009684] BUG: Bad rss-counter state mm:00000000a6707ec4 type:MM_ANONPAGES val:22 [ 31.174225] ================================================================== [ 31.175128] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.176163] Read of size 8 at addr ffff88800f3e3310 by task sshd/226 [ 31.176934] [ 31.177152] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.178019] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.178983] Call Trace: [ 31.179305] [ 31.179587] dump_stack_lvl+0x91/0xf0 [ 31.180073] print_report+0xcc/0x620 [ 31.180567] ? __virt_addr_valid+0x102/0x340 [ 31.181120] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.181725] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.182342] kasan_report+0xbe/0xf0 [ 31.182817] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.183438] vma_interval_tree_remove+0xc75/0xec0 [ 31.184034] vma_prepare+0xc54/0x11a0 [ 31.184529] __split_vma+0x5af/0x950 [ 31.184993] ? __pfx___split_vma+0x10/0x10 [ 31.185523] ? find_held_lock+0x2c/0x110 [ 31.186064] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.186622] ? lock_is_held_type+0x9f/0x120 [ 31.187158] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.187762] ? mtree_range_walk+0x632/0x900 [ 31.188304] ? mas_walk+0x5c7/0x7c0 [ 31.188780] do_vmi_munmap+0x1f1/0x2b0 [ 31.189268] mmap_region+0x1f9/0x2660 [ 31.189749] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.190254] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.190962] ? __pfx_lock_acquire+0x10/0x10 [ 31.191496] ? __pfx_mmap_region+0x10/0x10 [ 31.192030] ? security_mmap_addr+0x7d/0xa0 [ 31.192575] ? get_unmapped_area+0x1f5/0x3f0 [ 31.193125] do_mmap+0x854/0xf00 [ 31.193563] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.194056] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.194613] ksys_mmap_pgoff+0x3af/0x500 [ 31.195124] do_syscall_64+0x3f/0x90 [ 31.195598] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.196248] RIP: 0033:0x7fe1f7f5dd82 [ 31.196702] 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 [ 31.198793] RSP: 002b:00007ffe0f1b0bf8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.199682] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe1f7f5dd82 [ 31.200528] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe1f7397000 [ 31.201358] RBP: 00007fe1f7397000 R08: 0000000000000009 R09: 0000000000001000 [ 31.202189] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556f529d3ec0 [ 31.203025] R13: 00007ffe0f1b0c10 R14: 00007ffe0f1b0c40 R15: 00007ffe0f1b0fa0 [ 31.203867] [ 31.204159] [ 31.204373] Allocated by task 219: [ 31.204811] kasan_save_stack+0x22/0x50 [ 31.205308] kasan_set_track+0x25/0x30 [ 31.205794] __kasan_slab_alloc+0x59/0x70 [ 31.206311] kmem_cache_alloc+0x16b/0x370 [ 31.206820] vm_area_dup+0x20/0x160 [ 31.207269] __split_vma+0x170/0x950 [ 31.207730] split_vma+0xc6/0x110 [ 31.208159] mprotect_fixup+0x8d2/0xb30 [ 31.208660] do_mprotect_pkey+0x87e/0xd40 [ 31.209177] __x64_sys_mprotect+0x78/0xc0 [ 31.209698] do_syscall_64+0x3f/0x90 [ 31.210172] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.210810] [ 31.211022] Freed by task 19: [ 31.211403] kasan_save_stack+0x22/0x50 [ 31.211898] kasan_set_track+0x25/0x30 [ 31.212390] kasan_save_free_info+0x2b/0x50 [ 31.212932] __kasan_slab_free+0x10a/0x190 [ 31.213461] kmem_cache_free+0x10d/0x4d0 [ 31.213967] rcu_core+0x8c8/0x2860 [ 31.214409] __do_softirq+0x1b7/0x7d4 [ 31.214884] [ 31.215100] Last potentially related work creation: [ 31.215675] kasan_save_stack+0x22/0x50 [ 31.216175] __kasan_record_aux_stack+0x8e/0xa0 [ 31.216747] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.217387] remove_vma+0x139/0x170 [ 31.217834] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.218389] do_vmi_munmap+0x1f1/0x2b0 [ 31.218876] __vm_munmap+0x138/0x3a0 [ 31.219342] __x64_sys_munmap+0x59/0x80 [ 31.219835] do_syscall_64+0x3f/0x90 [ 31.220308] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.220949] [ 31.221164] The buggy address belongs to the object at ffff88800f3e32b8 [ 31.221164] which belongs to the cache vm_area_struct of size 168 [ 31.222605] The buggy address is located 88 bytes inside of [ 31.222605] freed 168-byte region [ffff88800f3e32b8, ffff88800f3e3360) [ 31.223987] [ 31.224203] The buggy address belongs to the physical page: [ 31.224886] page:00000000286f32e8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf3e3 [ 31.225969] memcg:ffff88800e1d9b01 [ 31.226391] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.227044] page_type: 0xffffffff() [ 31.227494] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.228414] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1d9b01 [ 31.229323] page dumped because: kasan: bad access detected [ 31.229983] [ 31.230197] Memory state around the buggy address: [ 31.230777] ffff88800f3e3200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.231625] ffff88800f3e3280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.232488] >ffff88800f3e3300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.233337] ^ [ 31.233807] ffff88800f3e3380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.234656] ffff88800f3e3400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.235499] ================================================================== [ 31.236450] Disabling lock debugging due to kernel taint [ 33.109034] BUG: Bad rss-counter state mm:00000000d27642f6 type:MM_FILEPAGES val:33 [ 33.110040] BUG: Bad rss-counter state mm:00000000d27642f6 type:MM_ANONPAGES val:22 [ 33.473436] BUG: Bad rss-counter state mm:000000007f1508ad type:MM_FILEPAGES val:33 [ 33.474420] BUG: Bad rss-counter state mm:000000007f1508ad type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19776' (ECDSA) to the list of known hosts. 2023/06/20 17:35:12 fuzzer started 2023/06/20 17:35:13 dialing manager at localhost:36067 2023/06/20 17:35:13 checking machine... 2023/06/20 17:35:13 checking revisions... [ 34.097974] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:35:13 testing simple program... [ 34.154891] cgroup: Unknown subsys name 'net' [ 34.220476] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:35:12 Registers: info registers vcpu 0 RAX=ffff88800f708001 RBX=ffff88800f707cd8 RCX=ffffffff86138e01 RDX=ffff88800f707ce0 RSI=0000000000000000 RDI=ffff88800f707988 RBP=ffff88800f700000 RSP=ffff88800f707908 R8 =ffffffff86138eb4 R9 =ffff88800f7079b8 R10=0000000000038001 R11=0000000000020d9c R12=ffff88800f7079d8 R13=ffff88800f7079c0 R14=ffff88800f707cd8 R15=ffff88800f707978 RIP=ffffffff81131cd2 RFL=00000283 [--S---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 00007ff994d08900 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=00007ff9952bd650 CR3=000000000e7b6000 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=0000000000000001 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=00007ffc4d1ae3c8 CR3=000000000f232000 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=2032313a35333a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a35333a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000