syzkaller login: [ 30.429435] BUG: Bad rss-counter state mm:0000000038615137 type:MM_FILEPAGES val:33 [ 30.431210] BUG: Bad rss-counter state mm:0000000038615137 type:MM_ANONPAGES val:22 [ 30.599992] ================================================================== [ 30.601113] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.602435] Read of size 8 at addr ffff88800e075310 by task sshd/220 [ 30.603233] [ 30.603444] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.604292] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.605246] Call Trace: [ 30.605574] [ 30.605843] dump_stack_lvl+0x91/0xf0 [ 30.606324] print_report+0xcc/0x620 [ 30.606799] ? __virt_addr_valid+0x102/0x340 [ 30.607320] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.607937] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.608532] kasan_report+0xbe/0xf0 [ 30.608985] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.609592] vma_interval_tree_remove+0xc75/0xec0 [ 30.610183] vma_prepare+0xc54/0x11a0 [ 30.610658] __split_vma+0x5af/0x950 [ 30.611131] ? __pfx___split_vma+0x10/0x10 [ 30.611693] ? find_held_lock+0x2c/0x110 [ 30.612218] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.612807] ? lock_is_held_type+0x9f/0x120 [ 30.613339] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.613982] ? mtree_range_walk+0x632/0x900 [ 30.614561] ? mas_walk+0x5c7/0x7c0 [ 30.615045] do_vmi_munmap+0x1f1/0x2b0 [ 30.615553] mmap_region+0x1f9/0x2660 [ 30.616045] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.616573] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.617278] ? __pfx_lock_acquire+0x10/0x10 [ 30.617830] ? __pfx_mmap_region+0x10/0x10 [ 30.618365] ? security_mmap_addr+0x7d/0xa0 [ 30.618904] ? get_unmapped_area+0x1f5/0x3f0 [ 30.619430] do_mmap+0x854/0xf00 [ 30.619882] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.620356] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.620908] ksys_mmap_pgoff+0x3af/0x500 [ 30.621394] do_syscall_64+0x3f/0x90 [ 30.621863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.622501] RIP: 0033:0x7f72335c8d82 [ 30.622947] 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 [ 30.624984] RSP: 002b:00007ffdc3821318 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.625854] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f72335c8d82 [ 30.626689] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7232a02000 [ 30.627487] RBP: 00007f7232a02000 R08: 0000000000000009 R09: 0000000000001000 [ 30.628319] R10: 0000000000000812 R11: 0000000000000206 R12: 000056443deb9ec0 [ 30.629172] R13: 00007ffdc3821330 R14: 00007ffdc3821360 R15: 00007ffdc38216c0 [ 30.630041] [ 30.630338] [ 30.630569] Allocated by task 213: [ 30.631001] kasan_save_stack+0x22/0x50 [ 30.631521] kasan_set_track+0x25/0x30 [ 30.632040] __kasan_slab_alloc+0x59/0x70 [ 30.632582] kmem_cache_alloc+0x16b/0x370 [ 30.633099] vm_area_dup+0x20/0x160 [ 30.633563] __split_vma+0x170/0x950 [ 30.634057] split_vma+0xc6/0x110 [ 30.634499] mprotect_fixup+0x8d2/0xb30 [ 30.635010] do_mprotect_pkey+0x87e/0xd40 [ 30.635558] __x64_sys_mprotect+0x78/0xc0 [ 30.636089] do_syscall_64+0x3f/0x90 [ 30.636578] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.637225] [ 30.637438] Freed by task 213: [ 30.637849] kasan_save_stack+0x22/0x50 [ 30.638380] kasan_set_track+0x25/0x30 [ 30.638892] kasan_save_free_info+0x2b/0x50 [ 30.639421] __kasan_slab_free+0x10a/0x190 [ 30.639994] kmem_cache_free+0x10d/0x4d0 [ 30.640512] rcu_core+0x8c8/0x2860 [ 30.640958] __do_softirq+0x1b7/0x7d4 [ 30.641439] [ 30.641676] Last potentially related work creation: [ 30.642273] kasan_save_stack+0x22/0x50 [ 30.642785] __kasan_record_aux_stack+0x8e/0xa0 [ 30.643360] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.644143] remove_vma+0x139/0x170 [ 30.644620] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.645169] do_vmi_munmap+0x1f1/0x2b0 [ 30.645671] __vm_munmap+0x138/0x3a0 [ 30.646163] __x64_sys_munmap+0x59/0x80 [ 30.646678] do_syscall_64+0x3f/0x90 [ 30.647146] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.647820] [ 30.648039] The buggy address belongs to the object at ffff88800e0752b8 [ 30.648039] which belongs to the cache vm_area_struct of size 168 [ 30.649532] The buggy address is located 88 bytes inside of [ 30.649532] freed 168-byte region [ffff88800e0752b8, ffff88800e075360) [ 30.650963] [ 30.651184] The buggy address belongs to the physical page: [ 30.651881] page:000000004ea39f3a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe075 [ 30.652976] memcg:ffff88800efbcc01 [ 30.653400] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.654167] page_type: 0xffffffff() [ 30.654639] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b54c0 dead000000000005 [ 30.655584] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800efbcc01 [ 30.656494] page dumped because: kasan: bad access detected [ 30.657165] [ 30.657377] Memory state around the buggy address: [ 30.657987] ffff88800e075200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.658855] ffff88800e075280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.659755] >ffff88800e075300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.660628] ^ [ 30.661096] ffff88800e075380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.661973] ffff88800e075400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.662837] ================================================================== [ 30.663788] Disabling lock debugging due to kernel taint [ 32.677603] BUG: Bad rss-counter state mm:00000000a1194b3c type:MM_FILEPAGES val:33 [ 32.678908] BUG: Bad rss-counter state mm:00000000a1194b3c type:MM_ANONPAGES val:22 [ 33.151731] BUG: Bad rss-counter state mm:000000000bddf21b type:MM_FILEPAGES val:33 [ 33.152790] BUG: Bad rss-counter state mm:000000000bddf21b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51923' (ECDSA) to the list of known hosts. 2023/06/21 00:36:58 fuzzer started 2023/06/21 00:36:58 dialing manager at localhost:36067 2023/06/21 00:36:58 checking machine... 2023/06/21 00:36:58 checking revisions... [ 33.802303] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:36:58 testing simple program... [ 33.846924] cgroup: Unknown subsys name 'net' [ 33.896852] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:36:58 Registers: info registers vcpu 0 RAX=ffff8880182c0001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff8880182bf801 RSI=ffff8880182bf8d0 RDI=ffff8880182bf8e8 RBP=ffff8880182bf930 RSP=ffff8880182bf818 R8 =ffffffff86098096 R9 =ffff8880182bf918 R10=0000000000038001 R11=0000000000006097 R12=ffff8880182bf938 R13=ffff8880182bf920 R14=ffff8880182bf8d8 R15=ffff8880182bf8d8 RIP=ffffffff81131039 RFL=00000202 [-------] 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 00007fdd2be89900 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=00007ffc90041000 CR3=000000001cd4a000 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=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=00007f0e0b4ad450 CR3=00000000168e0000 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=2037353a36333a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a36333a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000