syzkaller login: [ 31.464911] BUG: Bad rss-counter state mm:00000000b14c6fb9 type:MM_FILEPAGES val:33 [ 31.466100] BUG: Bad rss-counter state mm:00000000b14c6fb9 type:MM_ANONPAGES val:22 [ 31.551587] ================================================================== [ 31.552505] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.553469] Read of size 8 at addr ffff8880162c73f8 by task sshd/220 [ 31.554263] [ 31.554482] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.555466] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.556447] Call Trace: [ 31.556771] [ 31.557085] dump_stack_lvl+0x91/0xf0 [ 31.557575] print_report+0xcc/0x620 [ 31.558103] ? __virt_addr_valid+0x102/0x340 [ 31.558662] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.559300] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.559926] kasan_report+0xbe/0xf0 [ 31.560410] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.561044] vma_interval_tree_remove+0xc75/0xec0 [ 31.561654] vma_prepare+0xc54/0x11a0 [ 31.562161] __split_vma+0x5af/0x950 [ 31.562642] ? __pfx___split_vma+0x10/0x10 [ 31.563186] ? find_held_lock+0x2c/0x110 [ 31.563709] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.564294] ? lock_is_held_type+0x9f/0x120 [ 31.564842] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.565462] ? mtree_range_walk+0x632/0x900 [ 31.566045] ? mas_walk+0x5c7/0x7c0 [ 31.566527] do_vmi_munmap+0x1f1/0x2b0 [ 31.567035] mmap_region+0x1f9/0x2660 [ 31.567540] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.568071] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.568786] ? __pfx_lock_acquire+0x10/0x10 [ 31.569338] ? __pfx_mmap_region+0x10/0x10 [ 31.569898] ? security_mmap_addr+0x7d/0xa0 [ 31.570447] ? get_unmapped_area+0x1f5/0x3f0 [ 31.571005] do_mmap+0x854/0xf00 [ 31.571470] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.571970] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.572547] ksys_mmap_pgoff+0x3af/0x500 [ 31.573070] do_syscall_64+0x3f/0x90 [ 31.573554] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.574252] RIP: 0033:0x7f10739ecd82 [ 31.574711] 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 [ 31.576882] RSP: 002b:00007ffe6b7fa238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.577907] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f10739ecd82 [ 31.578810] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1072e26000 [ 31.579705] RBP: 00007f1072e26000 R08: 0000000000000009 R09: 0000000000001000 [ 31.580604] R10: 0000000000000812 R11: 0000000000000206 R12: 000055850cd6cd90 [ 31.581497] R13: 00007ffe6b7fa250 R14: 00007ffe6b7fa280 R15: 00007ffe6b7fa5e0 [ 31.582397] [ 31.582696] [ 31.582913] Allocated by task 213: [ 31.583357] kasan_save_stack+0x22/0x50 [ 31.583871] kasan_set_track+0x25/0x30 [ 31.584382] __kasan_slab_alloc+0x59/0x70 [ 31.584919] kmem_cache_alloc+0x16b/0x370 [ 31.585458] vm_area_dup+0x20/0x160 [ 31.585932] __split_vma+0x170/0x950 [ 31.586414] split_vma+0xc6/0x110 [ 31.586858] mprotect_fixup+0x8d2/0xb30 [ 31.587375] do_mprotect_pkey+0x87e/0xd40 [ 31.587903] __x64_sys_mprotect+0x78/0xc0 [ 31.588438] do_syscall_64+0x3f/0x90 [ 31.588915] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.589576] [ 31.589829] Freed by task 213: [ 31.590240] kasan_save_stack+0x22/0x50 [ 31.590749] kasan_set_track+0x25/0x30 [ 31.591260] kasan_save_free_info+0x2b/0x50 [ 31.591799] __kasan_slab_free+0x10a/0x190 [ 31.592349] kmem_cache_free+0x10d/0x4d0 [ 31.592867] rcu_core+0x8c8/0x2860 [ 31.593337] __do_softirq+0x1b7/0x7d4 [ 31.593833] [ 31.594068] Last potentially related work creation: [ 31.594650] kasan_save_stack+0x22/0x50 [ 31.595169] __kasan_record_aux_stack+0x8e/0xa0 [ 31.595747] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.596467] remove_vma+0x139/0x170 [ 31.596937] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.597516] do_vmi_munmap+0x1f1/0x2b0 [ 31.598044] __vm_munmap+0x138/0x3a0 [ 31.598514] __x64_sys_munmap+0x59/0x80 [ 31.599019] do_syscall_64+0x3f/0x90 [ 31.599497] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.600156] [ 31.600373] Second to last potentially related work creation: [ 31.601068] kasan_save_stack+0x22/0x50 [ 31.601576] __kasan_record_aux_stack+0x8e/0xa0 [ 31.602191] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.602837] remove_vma+0x139/0x170 [ 31.603305] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.603865] do_vmi_munmap+0x1f1/0x2b0 [ 31.604367] mmap_region+0x1f9/0x2660 [ 31.604850] do_mmap+0x854/0xf00 [ 31.605299] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.605819] ksys_mmap_pgoff+0x7d/0x500 [ 31.606342] do_syscall_64+0x3f/0x90 [ 31.606826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.607480] [ 31.607698] The buggy address belongs to the object at ffff8880162c73a0 [ 31.607698] which belongs to the cache vm_area_struct of size 168 [ 31.609205] The buggy address is located 88 bytes inside of [ 31.609205] freed 168-byte region [ffff8880162c73a0, ffff8880162c7448) [ 31.610655] [ 31.610875] The buggy address belongs to the physical page: [ 31.611551] page:000000009071ed99 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x162c7 [ 31.612656] memcg:ffff888015ac5401 [ 31.613090] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.613805] page_type: 0xffffffff() [ 31.614287] raw: 0100000000000200 ffff88800879fc80 ffffea000036a080 0000000000000007 [ 31.615232] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015ac5401 [ 31.616162] page dumped because: kasan: bad access detected [ 31.616827] [ 31.617057] Memory state around the buggy address: [ 31.617664] ffff8880162c7280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.618709] ffff8880162c7300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.619846] >ffff8880162c7380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.620969] ^ [ 31.622095] ffff8880162c7400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.623038] ffff8880162c7480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.623942] ================================================================== [ 31.624915] Disabling lock debugging due to kernel taint [ 33.567622] BUG: Bad rss-counter state mm:00000000ab572f66 type:MM_FILEPAGES val:33 [ 33.568373] BUG: Bad rss-counter state mm:00000000ab572f66 type:MM_ANONPAGES val:22 [ 34.017241] BUG: Bad rss-counter state mm:0000000013edc867 type:MM_FILEPAGES val:33 [ 34.018946] BUG: Bad rss-counter state mm:0000000013edc867 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59389' (ECDSA) to the list of known hosts. 2023/06/20 05:31:28 fuzzer started 2023/06/20 05:31:28 dialing manager at localhost:44161 2023/06/20 05:31:28 checking machine... 2023/06/20 05:31:28 checking revisions... [ 34.759957] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:31:28 testing simple program... [ 34.824390] cgroup: Unknown subsys name 'net' [ 34.868000] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:31:27 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007efc866af810 CR3=000000000cac4000 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=2037323a31333a3530203032206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a323935323420 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a31333a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff87f94640 RCX=ffffffff83c18160 RDX=fffffbfff0ff66f1 RSI=0000000000000008 RDI=ffffffff87fb3780 RBP=ffff8880191f05c0 RSP=ffff88800c41fdb0 R8 =0000000000000001 R9 =fffffbfff0ff66f0 R10=ffffffff87fb3787 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffff8880191f05c0 R15=0000000000000000 RIP=ffffffff83c18168 RFL=00000206 [-----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 00007f310dafc900 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=00007f310e0b1650 CR3=000000000ed2e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000