syzkaller login: [ 28.724904] BUG: Bad rss-counter state mm:00000000800b2894 type:MM_FILEPAGES val:33 [ 28.726331] BUG: Bad rss-counter state mm:00000000800b2894 type:MM_ANONPAGES val:22 [ 28.820453] ================================================================== [ 28.821414] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.822410] Read of size 8 at addr ffff88800e1666b0 by task sshd/218 [ 28.823323] [ 28.823554] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.824464] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.825513] Call Trace: [ 28.825850] [ 28.826149] dump_stack_lvl+0x91/0xf0 [ 28.826670] print_report+0xcc/0x620 [ 28.827218] ? __virt_addr_valid+0x102/0x340 [ 28.827803] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.828456] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.829114] kasan_report+0xbe/0xf0 [ 28.829621] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.830293] vma_interval_tree_remove+0xc75/0xec0 [ 28.830959] vma_prepare+0xc54/0x11a0 [ 28.831508] __split_vma+0x5af/0x950 [ 28.832032] ? __pfx___split_vma+0x10/0x10 [ 28.832617] ? find_held_lock+0x2c/0x110 [ 28.833190] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.833811] ? lock_is_held_type+0x9f/0x120 [ 28.834413] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.835096] ? mtree_range_walk+0x632/0x900 [ 28.835708] ? mas_walk+0x5c7/0x7c0 [ 28.836237] do_vmi_munmap+0x1f1/0x2b0 [ 28.836779] mmap_region+0x1f9/0x2660 [ 28.837318] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.837884] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.838677] ? __pfx_lock_acquire+0x10/0x10 [ 28.839268] ? __pfx_mmap_region+0x10/0x10 [ 28.839851] ? security_mmap_addr+0x7d/0xa0 [ 28.840438] ? get_unmapped_area+0x1f5/0x3f0 [ 28.841042] do_mmap+0x854/0xf00 [ 28.841522] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.842065] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.842684] ksys_mmap_pgoff+0x3af/0x500 [ 28.843261] do_syscall_64+0x3f/0x90 [ 28.843793] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.844514] RIP: 0033:0x7fbbfcacdd82 [ 28.845018] 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 [ 28.847384] RSP: 002b:00007ffecf354688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.848372] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbbfcacdd82 [ 28.849307] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbbfbf07000 [ 28.850240] RBP: 00007fbbfbf07000 R08: 0000000000000009 R09: 0000000000001000 [ 28.851185] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a29af42ec0 [ 28.852123] R13: 00007ffecf3546a0 R14: 00007ffecf3546d0 R15: 00007ffecf354a30 [ 28.853067] [ 28.853388] [ 28.853621] Allocated by task 211: [ 28.854099] kasan_save_stack+0x22/0x50 [ 28.854656] kasan_set_track+0x25/0x30 [ 28.855218] __kasan_slab_alloc+0x59/0x70 [ 28.855801] kmem_cache_alloc+0x16b/0x370 [ 28.856372] vm_area_dup+0x20/0x160 [ 28.856877] __split_vma+0x170/0x950 [ 28.857386] split_vma+0xc6/0x110 [ 28.857867] mprotect_fixup+0x8d2/0xb30 [ 28.858414] do_mprotect_pkey+0x87e/0xd40 [ 28.858983] __x64_sys_mprotect+0x78/0xc0 [ 28.859570] do_syscall_64+0x3f/0x90 [ 28.860089] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.860799] [ 28.861033] Freed by task 211: [ 28.861471] kasan_save_stack+0x22/0x50 [ 28.862027] kasan_set_track+0x25/0x30 [ 28.862574] kasan_save_free_info+0x2b/0x50 [ 28.863176] __kasan_slab_free+0x10a/0x190 [ 28.863759] kmem_cache_free+0x10d/0x4d0 [ 28.864316] rcu_core+0x8c8/0x2860 [ 28.864805] __do_softirq+0x1b7/0x7d4 [ 28.865339] [ 28.865573] Last potentially related work creation: [ 28.866216] kasan_save_stack+0x22/0x50 [ 28.866768] __kasan_record_aux_stack+0x8e/0xa0 [ 28.867402] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.868109] remove_vma+0x139/0x170 [ 28.868604] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.869213] do_vmi_munmap+0x1f1/0x2b0 [ 28.869745] __vm_munmap+0x138/0x3a0 [ 28.870259] __x64_sys_munmap+0x59/0x80 [ 28.870806] do_syscall_64+0x3f/0x90 [ 28.871341] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.872059] [ 28.872297] The buggy address belongs to the object at ffff88800e166658 [ 28.872297] which belongs to the cache vm_area_struct of size 168 [ 28.873923] The buggy address is located 88 bytes inside of [ 28.873923] freed 168-byte region [ffff88800e166658, ffff88800e166700) [ 28.875473] [ 28.875708] The buggy address belongs to the physical page: [ 28.876427] page:0000000041d67924 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe166 [ 28.877623] memcg:ffff88800cdd0f01 [ 28.878094] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.878803] page_type: 0xffffffff() [ 28.879311] raw: 0100000000000200 ffff8880087a0c80 ffffea000031e840 dead000000000008 [ 28.880332] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cdd0f01 [ 28.881335] page dumped because: kasan: bad access detected [ 28.882063] [ 28.882298] Memory state around the buggy address: [ 28.882931] ffff88800e166580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.883880] ffff88800e166600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 28.884823] >ffff88800e166680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.885760] ^ [ 28.886401] ffff88800e166700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 28.887346] ffff88800e166780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 28.888280] ================================================================== [ 28.889614] Disabling lock debugging due to kernel taint [ 30.288394] BUG: Bad rss-counter state mm:00000000a1fac690 type:MM_FILEPAGES val:33 [ 30.289114] BUG: Bad rss-counter state mm:00000000a1fac690 type:MM_ANONPAGES val:22 [ 30.646935] BUG: Bad rss-counter state mm:00000000fa0d9c47 type:MM_FILEPAGES val:33 [ 30.647433] BUG: Bad rss-counter state mm:00000000fa0d9c47 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56348' (ECDSA) to the list of known hosts. 2023/06/21 05:26:54 fuzzer started 2023/06/21 05:26:54 dialing manager at localhost:36067 2023/06/21 05:26:54 checking machine... 2023/06/21 05:26:54 checking revisions... [ 31.319129] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:26:54 testing simple program... [ 31.365257] cgroup: Unknown subsys name 'net' [ 31.428197] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:26:53 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000002 RDX=1ffff1100d9c1355 RSI=ffff88806ce09fe0 RDI=ffff88806ce09aa8 RBP=ffff88806ce09fe0 RSP=ffff88806ce099f0 R8 =ffffffff864b6d22 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5d59 R12=0000000000000008 R13=ffff88806ce02000 R14=ffff88806ce09fe8 R15=ffff88806ce09a98 RIP=ffffffff81130468 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 0000000000000000 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=00007ffdb6825778 CR3=000000000961e000 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=2033353a36323a3530203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a36323a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800f429b40 RCX=0000000000000100 RDX=ffff88800f429b40 RSI=ffffffff814c8467 RDI=ffffffff85652b60 RBP=00007f81e4821024 RSP=ffff88806cf099f0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=00007f81e4821024 R13=0000000000000000 R14=ffff88800f429b40 R15=ffff888015c1c300 RIP=ffffffff8135bd59 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 00007f81e4339900 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=00007f81e48f10b0 CR3=000000000e400000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000