syzkaller login: [ 70.616208] BUG: Bad rss-counter state mm:0000000001aa71a6 type:MM_FILEPAGES val:33 [ 70.617317] BUG: Bad rss-counter state mm:0000000001aa71a6 type:MM_ANONPAGES val:22 [ 70.800112] ================================================================== [ 70.801235] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 70.802465] Read of size 8 at addr ffff8880180c5798 by task sshd/220 [ 70.803365] [ 70.803651] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 70.804524] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 70.805501] Call Trace: [ 70.805822] [ 70.806113] dump_stack_lvl+0x91/0xf0 [ 70.806621] print_report+0xcc/0x620 [ 70.807111] ? __virt_addr_valid+0x102/0x340 [ 70.807683] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.808318] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.808939] kasan_report+0xbe/0xf0 [ 70.809419] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.810042] vma_interval_tree_remove+0xc75/0xec0 [ 70.810651] vma_prepare+0xc54/0x11a0 [ 70.811135] __split_vma+0x5af/0x950 [ 70.811623] ? __pfx___split_vma+0x10/0x10 [ 70.812154] ? find_held_lock+0x2c/0x110 [ 70.812675] do_vmi_align_munmap+0x2ba/0x11f0 [ 70.813250] ? lock_is_held_type+0x9f/0x120 [ 70.813788] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 70.814395] ? mtree_range_walk+0x632/0x900 [ 70.814945] ? mas_walk+0x5c7/0x7c0 [ 70.815418] do_vmi_munmap+0x1f1/0x2b0 [ 70.815927] mmap_region+0x1f9/0x2660 [ 70.816416] ? vm_mmap_pgoff+0x15c/0x3a0 [ 70.816935] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 70.817659] ? __pfx_lock_acquire+0x10/0x10 [ 70.818191] ? __pfx_mmap_region+0x10/0x10 [ 70.818731] ? security_mmap_addr+0x7d/0xa0 [ 70.819272] ? get_unmapped_area+0x1f5/0x3f0 [ 70.819826] do_mmap+0x854/0xf00 [ 70.820264] vm_mmap_pgoff+0x1a6/0x3a0 [ 70.820769] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 70.821339] ksys_mmap_pgoff+0x3af/0x500 [ 70.821853] do_syscall_64+0x3f/0x90 [ 70.822329] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.823002] RIP: 0033:0x7f82c4102d82 [ 70.823465] 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 [ 70.825623] RSP: 002b:00007ffc68c7f128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 70.826544] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f82c4102d82 [ 70.827398] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f82c353c000 [ 70.828250] RBP: 00007f82c353c000 R08: 0000000000000009 R09: 0000000000001000 [ 70.829092] R10: 0000000000000812 R11: 0000000000000206 R12: 00005635a1e8cb20 [ 70.829941] R13: 00007ffc68c7f140 R14: 00007ffc68c7f170 R15: 00007ffc68c7f4d0 [ 70.830799] [ 70.831090] [ 70.831307] Allocated by task 213: [ 70.831742] kasan_save_stack+0x22/0x50 [ 70.832253] kasan_set_track+0x25/0x30 [ 70.832753] __kasan_slab_alloc+0x59/0x70 [ 70.833280] kmem_cache_alloc+0x16b/0x370 [ 70.833801] vm_area_dup+0x20/0x160 [ 70.834266] __split_vma+0x170/0x950 [ 70.834744] split_vma+0xc6/0x110 [ 70.835188] mprotect_fixup+0x8d2/0xb30 [ 70.835711] do_mprotect_pkey+0x87e/0xd40 [ 70.836233] __x64_sys_mprotect+0x78/0xc0 [ 70.836756] do_syscall_64+0x3f/0x90 [ 70.837232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.837882] [ 70.838104] Freed by task 202: [ 70.838497] kasan_save_stack+0x22/0x50 [ 70.839017] kasan_set_track+0x25/0x30 [ 70.839519] kasan_save_free_info+0x2b/0x50 [ 70.840051] __kasan_slab_free+0x10a/0x190 [ 70.840593] kmem_cache_free+0x10d/0x4d0 [ 70.841116] rcu_core+0x8c8/0x2860 [ 70.841561] __do_softirq+0x1b7/0x7d4 [ 70.842042] [ 70.842256] Last potentially related work creation: [ 70.842911] kasan_save_stack+0x22/0x50 [ 70.843418] __kasan_record_aux_stack+0x8e/0xa0 [ 70.844013] __call_rcu_common.constprop.0+0x6a/0xb90 [ 70.844660] remove_vma+0x139/0x170 [ 70.845117] do_vmi_align_munmap+0xd4a/0x11f0 [ 70.845678] do_vmi_munmap+0x1f1/0x2b0 [ 70.846163] __vm_munmap+0x138/0x3a0 [ 70.846635] __x64_sys_munmap+0x59/0x80 [ 70.847134] do_syscall_64+0x3f/0x90 [ 70.847636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.848277] [ 70.848493] The buggy address belongs to the object at ffff8880180c5740 [ 70.848493] which belongs to the cache vm_area_struct of size 168 [ 70.849965] The buggy address is located 88 bytes inside of [ 70.849965] freed 168-byte region [ffff8880180c5740, ffff8880180c57e8) [ 70.851375] [ 70.851598] The buggy address belongs to the physical page: [ 70.852254] page:00000000977016c3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x180c5 [ 70.853347] memcg:ffff88800efeda01 [ 70.853774] flags: 0x100000000000200(slab|node=0|zone=1) [ 70.854421] page_type: 0xffffffff() [ 70.854878] raw: 0100000000000200 ffff88800879fc80 ffffea00003f32c0 dead000000000008 [ 70.855823] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800efeda01 [ 70.856730] page dumped because: kasan: bad access detected [ 70.857391] [ 70.857610] Memory state around the buggy address: [ 70.858191] ffff8880180c5680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 70.859051] ffff8880180c5700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 70.859923] >ffff8880180c5780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 70.860771] ^ [ 70.861260] ffff8880180c5800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 70.862121] ffff8880180c5880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 70.862968] ================================================================== [ 70.863987] Disabling lock debugging due to kernel taint [ 73.151475] BUG: Bad rss-counter state mm:0000000017dff68c type:MM_FILEPAGES val:33 [ 73.152666] BUG: Bad rss-counter state mm:0000000017dff68c type:MM_ANONPAGES val:22 [ 73.591480] BUG: Bad rss-counter state mm:0000000017561e51 type:MM_FILEPAGES val:33 [ 73.593100] BUG: Bad rss-counter state mm:0000000017561e51 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48820' (ECDSA) to the list of known hosts. 2023/06/19 23:34:00 fuzzer started 2023/06/19 23:34:00 dialing manager at localhost:44161 2023/06/19 23:34:00 checking machine... 2023/06/19 23:34:00 checking revisions... [ 74.308871] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:34:00 testing simple program... [ 74.359944] cgroup: Unknown subsys name 'net' [ 74.417045] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:33:48 Registers: info registers vcpu 0 RAX=ffff888019020000 RBX=ffff88801901fd98 RCX=0000000000000001 RDX=ffff88801901fda0 RSI=ffff88801901fd80 RDI=ffff88801901f888 RBP=ffff888019018000 RSP=ffff88801901f808 R8 =0000000000000001 R9 =ffff88801901f8b8 R10=0000000000038001 R11=0000000000024372 R12=ffff88801901f8d8 R13=ffff88801901f8c0 R14=ffff88801901fd80 R15=ffff88801901f878 RIP=ffffffff81131296 RFL=00000287 [--S--PC] 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 00007fd6a75cc900 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=00007ffd991cd000 CR3=000000000e880000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f89424eb000 CR3=0000000008f3c000 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=2039353a33333a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a33333a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000