syzkaller login: [ 28.730573] BUG: Bad rss-counter state mm:000000003fd09084 type:MM_FILEPAGES val:33 [ 28.731585] BUG: Bad rss-counter state mm:000000003fd09084 type:MM_ANONPAGES val:22 [ 28.894849] ================================================================== [ 28.895776] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.896741] Read of size 8 at addr ffff88800e141058 by task sshd/221 [ 28.897515] [ 28.897740] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.898738] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.899731] Call Trace: [ 28.900059] [ 28.900349] dump_stack_lvl+0x91/0xf0 [ 28.900867] print_report+0xcc/0x620 [ 28.901362] ? __virt_addr_valid+0x102/0x340 [ 28.901912] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.902531] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.903157] kasan_report+0xbe/0xf0 [ 28.903636] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.904260] vma_interval_tree_remove+0xc75/0xec0 [ 28.904870] vma_prepare+0xc54/0x11a0 [ 28.905345] __split_vma+0x5af/0x950 [ 28.905815] ? __pfx___split_vma+0x10/0x10 [ 28.906345] ? find_held_lock+0x2c/0x110 [ 28.906866] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.907429] ? lock_is_held_type+0x9f/0x120 [ 28.907967] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.908574] ? mtree_range_walk+0x632/0x900 [ 28.909121] ? mas_walk+0x5c7/0x7c0 [ 28.909605] do_vmi_munmap+0x1f1/0x2b0 [ 28.910098] mmap_region+0x1f9/0x2660 [ 28.910575] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.911082] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.911788] ? __pfx_lock_acquire+0x10/0x10 [ 28.912322] ? __pfx_mmap_region+0x10/0x10 [ 28.912875] ? security_mmap_addr+0x7d/0xa0 [ 28.913407] ? get_unmapped_area+0x1f5/0x3f0 [ 28.913952] do_mmap+0x854/0xf00 [ 28.914395] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.914889] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.915451] ksys_mmap_pgoff+0x3af/0x500 [ 28.915957] do_syscall_64+0x3f/0x90 [ 28.916438] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.917094] RIP: 0033:0x7fb6d3569d82 [ 28.917543] 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 [ 28.919670] RSP: 002b:00007ffd74162568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.920589] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb6d3569d82 [ 28.921445] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb6d29a3000 [ 28.922303] RBP: 00007fb6d29a3000 R08: 0000000000000009 R09: 0000000000001000 [ 28.923207] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564ced113f70 [ 28.924073] R13: 00007ffd74162580 R14: 00007ffd741625b0 R15: 00007ffd74162910 [ 28.924944] [ 28.925237] [ 28.925461] Allocated by task 214: [ 28.925900] kasan_save_stack+0x22/0x50 [ 28.926412] kasan_set_track+0x25/0x30 [ 28.926911] __kasan_slab_alloc+0x59/0x70 [ 28.927448] kmem_cache_alloc+0x16b/0x370 [ 28.927967] vm_area_dup+0x20/0x160 [ 28.928429] __split_vma+0x170/0x950 [ 28.928911] split_vma+0xc6/0x110 [ 28.929364] mprotect_fixup+0x8d2/0xb30 [ 28.929873] do_mprotect_pkey+0x87e/0xd40 [ 28.930404] __x64_sys_mprotect+0x78/0xc0 [ 28.930923] do_syscall_64+0x3f/0x90 [ 28.931398] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.932043] [ 28.932259] Freed by task 214: [ 28.932673] kasan_save_stack+0x22/0x50 [ 28.933175] kasan_set_track+0x25/0x30 [ 28.933675] kasan_save_free_info+0x2b/0x50 [ 28.934202] __kasan_slab_free+0x10a/0x190 [ 28.934733] kmem_cache_free+0x10d/0x4d0 [ 28.935239] rcu_core+0x8c8/0x2860 [ 28.935688] __do_softirq+0x1b7/0x7d4 [ 28.936164] [ 28.936380] Last potentially related work creation: [ 28.936973] kasan_save_stack+0x22/0x50 [ 28.937480] __kasan_record_aux_stack+0x8e/0xa0 [ 28.938057] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.938704] remove_vma+0x139/0x170 [ 28.939152] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.939732] do_vmi_munmap+0x1f1/0x2b0 [ 28.940213] __vm_munmap+0x138/0x3a0 [ 28.940700] __x64_sys_munmap+0x59/0x80 [ 28.941199] do_syscall_64+0x3f/0x90 [ 28.941677] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.942316] [ 28.942532] The buggy address belongs to the object at ffff88800e141000 [ 28.942532] which belongs to the cache vm_area_struct of size 168 [ 28.943987] The buggy address is located 88 bytes inside of [ 28.943987] freed 168-byte region [ffff88800e141000, ffff88800e1410a8) [ 28.945384] [ 28.945600] The buggy address belongs to the physical page: [ 28.946257] page:00000000b8c01362 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe141 [ 28.947334] memcg:ffff88800e00f201 [ 28.947767] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.948408] page_type: 0xffffffff() [ 28.948870] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.949785] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e00f201 [ 28.950699] page dumped because: kasan: bad access detected [ 28.951368] [ 28.951587] Memory state around the buggy address: [ 28.952167] ffff88800e140f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 28.953038] ffff88800e140f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.953885] >ffff88800e141000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.954758] ^ [ 28.955501] ffff88800e141080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 28.956361] ffff88800e141100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.957227] ================================================================== [ 28.958160] Disabling lock debugging due to kernel taint [ 30.938935] BUG: Bad rss-counter state mm:00000000a185dbe6 type:MM_FILEPAGES val:33 [ 30.940085] BUG: Bad rss-counter state mm:00000000a185dbe6 type:MM_ANONPAGES val:22 [ 31.307400] BUG: Bad rss-counter state mm:0000000035fafd0b type:MM_FILEPAGES val:33 [ 31.308349] BUG: Bad rss-counter state mm:0000000035fafd0b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23457' (ECDSA) to the list of known hosts. 2023/06/21 03:18:21 fuzzer started 2023/06/21 03:18:21 dialing manager at localhost:36067 2023/06/21 03:18:21 checking machine... 2023/06/21 03:18:21 checking revisions... [ 32.019933] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:18:21 testing simple program... [ 32.069112] cgroup: Unknown subsys name 'net' [ 32.111066] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:18:21 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff8613f40e RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800f25f468 RSP=ffff88800f25f3a0 R8 =ffffffff8613f412 R9 =ffff88800f25f450 R10=0000000000038001 R11=0000000000021e7d R12=ffff88800f25f470 R13=ffff88800f25f458 R14=ffff88800f25f451 R15=ffff88800f25f410 RIP=ffffffff81130ad0 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 00007f0d4b8d4900 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=00007ffcc89bb000 CR3=000000000e36e000 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=00007f5592b7c800 CR3=000000001039c000 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=2031323a38313a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a38313a3330203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000