syzkaller login: [ 40.630536] BUG: Bad rss-counter state mm:00000000f5c2a13b type:MM_FILEPAGES val:33 [ 40.631714] BUG: Bad rss-counter state mm:00000000f5c2a13b type:MM_ANONPAGES val:22 [ 40.791295] ================================================================== [ 40.792754] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.794015] Read of size 8 at addr ffff888016de3968 by task sshd/220 [ 40.795049] [ 40.795354] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.796506] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.797754] Call Trace: [ 40.798132] [ 40.798466] dump_stack_lvl+0x91/0xf0 [ 40.799056] print_report+0xcc/0x620 [ 40.799645] ? __virt_addr_valid+0x102/0x340 [ 40.800368] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.801188] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.802007] kasan_report+0xbe/0xf0 [ 40.802636] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.803463] vma_interval_tree_remove+0xc75/0xec0 [ 40.804226] vma_prepare+0xc54/0x11a0 [ 40.804878] __split_vma+0x5af/0x950 [ 40.805485] ? __pfx___split_vma+0x10/0x10 [ 40.806164] ? find_held_lock+0x2c/0x110 [ 40.806837] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.807566] ? lock_is_held_type+0x9f/0x120 [ 40.808271] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.809083] ? mtree_range_walk+0x632/0x900 [ 40.809805] ? mas_walk+0x5c7/0x7c0 [ 40.810415] do_vmi_munmap+0x1f1/0x2b0 [ 40.811060] mmap_region+0x1f9/0x2660 [ 40.811687] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.812352] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.813299] ? __pfx_lock_acquire+0x10/0x10 [ 40.814011] ? __pfx_mmap_region+0x10/0x10 [ 40.814742] ? security_mmap_addr+0x7d/0xa0 [ 40.815443] ? get_unmapped_area+0x1f5/0x3f0 [ 40.816164] do_mmap+0x854/0xf00 [ 40.816774] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.817464] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.818222] ksys_mmap_pgoff+0x3af/0x500 [ 40.818909] do_syscall_64+0x3f/0x90 [ 40.819540] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.820418] RIP: 0033:0x7faaacd10d82 [ 40.821016] 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 [ 40.823797] RSP: 002b:00007fff64f10b18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.824945] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faaacd10d82 [ 40.825794] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faaac14a000 [ 40.826633] RBP: 00007faaac14a000 R08: 0000000000000009 R09: 0000000000001000 [ 40.827471] R10: 0000000000000812 R11: 0000000000000206 R12: 00005614c4c87ec0 [ 40.828312] R13: 00007fff64f10b30 R14: 00007fff64f10b60 R15: 00007fff64f10ec0 [ 40.829177] [ 40.829464] [ 40.829676] Allocated by task 213: [ 40.830105] kasan_save_stack+0x22/0x50 [ 40.830604] kasan_set_track+0x25/0x30 [ 40.831084] __kasan_slab_alloc+0x59/0x70 [ 40.831601] kmem_cache_alloc+0x16b/0x370 [ 40.832102] vm_area_dup+0x20/0x160 [ 40.832544] __split_vma+0x170/0x950 [ 40.833002] split_vma+0xc6/0x110 [ 40.833539] mprotect_fixup+0x8d2/0xb30 [ 40.834039] do_mprotect_pkey+0x87e/0xd40 [ 40.834546] __x64_sys_mprotect+0x78/0xc0 [ 40.835062] do_syscall_64+0x3f/0x90 [ 40.835531] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.836154] [ 40.836370] Freed by task 213: [ 40.836779] kasan_save_stack+0x22/0x50 [ 40.837279] kasan_set_track+0x25/0x30 [ 40.837758] kasan_save_free_info+0x2b/0x50 [ 40.838287] __kasan_slab_free+0x10a/0x190 [ 40.838813] kmem_cache_free+0x10d/0x4d0 [ 40.839316] rcu_core+0x8c8/0x2860 [ 40.839753] __do_softirq+0x1b7/0x7d4 [ 40.840219] [ 40.840431] Last potentially related work creation: [ 40.841023] kasan_save_stack+0x22/0x50 [ 40.841509] __kasan_record_aux_stack+0x8e/0xa0 [ 40.842081] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.842718] remove_vma+0x139/0x170 [ 40.843170] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.843724] do_vmi_munmap+0x1f1/0x2b0 [ 40.844216] __vm_munmap+0x138/0x3a0 [ 40.844680] __x64_sys_munmap+0x59/0x80 [ 40.845172] do_syscall_64+0x3f/0x90 [ 40.845645] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.846270] [ 40.846482] The buggy address belongs to the object at ffff888016de3910 [ 40.846482] which belongs to the cache vm_area_struct of size 168 [ 40.847944] The buggy address is located 88 bytes inside of [ 40.847944] freed 168-byte region [ffff888016de3910, ffff888016de39b8) [ 40.849344] [ 40.849557] The buggy address belongs to the physical page: [ 40.850216] page:000000001d484896 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16de3 [ 40.851281] memcg:ffff888015b22701 [ 40.851704] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.852342] page_type: 0xffffffff() [ 40.852793] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.853699] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015b22701 [ 40.854579] page dumped because: kasan: bad access detected [ 40.855231] [ 40.855443] Memory state around the buggy address: [ 40.856012] ffff888016de3800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 40.856876] ffff888016de3880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 40.857726] >ffff888016de3900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.858570] ^ [ 40.859338] ffff888016de3980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 40.860186] ffff888016de3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.861027] ================================================================== [ 40.862111] Disabling lock debugging due to kernel taint [ 42.738428] BUG: Bad rss-counter state mm:00000000241514aa type:MM_FILEPAGES val:33 [ 42.739409] BUG: Bad rss-counter state mm:00000000241514aa type:MM_ANONPAGES val:22 [ 43.272774] BUG: Bad rss-counter state mm:0000000013c6c12c type:MM_FILEPAGES val:33 [ 43.273998] BUG: Bad rss-counter state mm:0000000013c6c12c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7497' (ECDSA) to the list of known hosts. 2023/06/20 03:31:16 fuzzer started 2023/06/20 03:31:16 dialing manager at localhost:44161 2023/06/20 03:31:16 checking machine... 2023/06/20 03:31:16 checking revisions... [ 43.993798] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:31:17 testing simple program... [ 44.036439] cgroup: Unknown subsys name 'net' [ 44.080579] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:31:06 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888015e965c0 RCX=0000000000000000 RDX=ffff88800d00d1c0 RSI=ffffffff81b28e3e RDI=0000000000000005 RBP=ffff88800d3a7980 RSP=ffff88800cf07718 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888017891d00 R13=ffff88801018e000 R14=ffff88801018e738 R15=ffff88800cf07790 RIP=ffffffff814c081b 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 00007f889746e700 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=00007fb0fdc34e80 CR3=000000000d030000 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=2036313a31333a3330203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a31333a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000029 RBX=000055de66a9c200 RCX=00007f62f4c08477 RDX=0000000000000000 RSI=0000000000080003 RDI=0000000000000010 RBP=00007ffd9a4b2fe0 RSP=ffff888015ad7ff0 R8 =000055de66a88b70 R9 =00000000ffffffff R10=000055de66aa00b0 R11=0000000000000246 R12=0000000000000000 R13=00007ffd9a4b35d0 R14=000055de66a9c2b0 R15=00007ffd9a4b3680 RIP=ffffffff84600037 RFL=00000002 [-------] 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 00007f62f4715900 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=00007ffd9a4b0000 CR3=0000000016cf2000 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=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