syzkaller login: [ 42.627100] BUG: Bad rss-counter state mm:000000001b32b727 type:MM_FILEPAGES val:33 [ 42.628327] BUG: Bad rss-counter state mm:000000001b32b727 type:MM_ANONPAGES val:22 [ 42.808806] ================================================================== [ 42.809336] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.809860] Read of size 8 at addr ffff88800ed17a50 by task sshd/219 [ 42.810277] [ 42.810399] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.810880] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.811517] Call Trace: [ 42.811701] [ 42.811858] dump_stack_lvl+0x91/0xf0 [ 42.812130] print_report+0xcc/0x620 [ 42.812397] ? __virt_addr_valid+0x102/0x340 [ 42.812706] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.813042] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.813398] kasan_report+0xbe/0xf0 [ 42.813664] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.814008] vma_interval_tree_remove+0xc75/0xec0 [ 42.814340] vma_prepare+0xc54/0x11a0 [ 42.814607] __split_vma+0x5af/0x950 [ 42.814872] ? __pfx___split_vma+0x10/0x10 [ 42.815161] ? find_held_lock+0x2c/0x110 [ 42.815446] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.815781] ? lock_is_held_type+0x9f/0x120 [ 42.816082] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.816416] ? mtree_range_walk+0x632/0x900 [ 42.816774] ? mas_walk+0x5c7/0x7c0 [ 42.817139] do_vmi_munmap+0x1f1/0x2b0 [ 42.817525] mmap_region+0x1f9/0x2660 [ 42.817901] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.818303] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.818855] ? __pfx_lock_acquire+0x10/0x10 [ 42.819268] ? __pfx_mmap_region+0x10/0x10 [ 42.819690] ? security_mmap_addr+0x7d/0xa0 [ 42.820106] ? get_unmapped_area+0x1f5/0x3f0 [ 42.820534] do_mmap+0x854/0xf00 [ 42.820873] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.821258] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.821696] ksys_mmap_pgoff+0x3af/0x500 [ 42.822091] do_syscall_64+0x3f/0x90 [ 42.822458] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.822963] RIP: 0033:0x7f7a1d681d82 [ 42.823317] 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 [ 42.824921] RSP: 002b:00007ffd8cb91d48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.825457] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7a1d681d82 [ 42.825948] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7a1cabb000 [ 42.826458] RBP: 00007f7a1cabb000 R08: 0000000000000009 R09: 0000000000001000 [ 42.826967] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b34345cd90 [ 42.827478] R13: 00007ffd8cb91d60 R14: 00007ffd8cb91d90 R15: 00007ffd8cb920f0 [ 42.827993] [ 42.828166] [ 42.828292] Allocated by task 212: [ 42.828552] kasan_save_stack+0x22/0x50 [ 42.828853] kasan_set_track+0x25/0x30 [ 42.829145] __kasan_slab_alloc+0x59/0x70 [ 42.829456] kmem_cache_alloc+0x16b/0x370 [ 42.829766] vm_area_dup+0x20/0x160 [ 42.830033] __split_vma+0x170/0x950 [ 42.830306] split_vma+0xc6/0x110 [ 42.830567] mprotect_fixup+0x8d2/0xb30 [ 42.830857] do_mprotect_pkey+0x87e/0xd40 [ 42.831168] __x64_sys_mprotect+0x78/0xc0 [ 42.831474] do_syscall_64+0x3f/0x90 [ 42.831751] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.832133] [ 42.832263] Freed by task 212: [ 42.832494] kasan_save_stack+0x22/0x50 [ 42.832797] kasan_set_track+0x25/0x30 [ 42.833087] kasan_save_free_info+0x2b/0x50 [ 42.833397] __kasan_slab_free+0x10a/0x190 [ 42.833712] kmem_cache_free+0x10d/0x4d0 [ 42.834012] rcu_core+0x8c8/0x2860 [ 42.834275] __do_softirq+0x1b7/0x7d4 [ 42.834554] [ 42.834683] Last potentially related work creation: [ 42.835027] kasan_save_stack+0x22/0x50 [ 42.835325] __kasan_record_aux_stack+0x8e/0xa0 [ 42.835670] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.836056] remove_vma+0x139/0x170 [ 42.836325] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.836656] do_vmi_munmap+0x1f1/0x2b0 [ 42.836936] __vm_munmap+0x138/0x3a0 [ 42.837212] __x64_sys_munmap+0x59/0x80 [ 42.837505] do_syscall_64+0x3f/0x90 [ 42.837783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.838155] [ 42.838283] The buggy address belongs to the object at ffff88800ed179f8 [ 42.838283] which belongs to the cache vm_area_struct of size 168 [ 42.839158] The buggy address is located 88 bytes inside of [ 42.839158] freed 168-byte region [ffff88800ed179f8, ffff88800ed17aa0) [ 42.840007] [ 42.840135] The buggy address belongs to the physical page: [ 42.840530] page:00000000e5d54e49 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed17 [ 42.841175] memcg:ffff88800ead2101 [ 42.841429] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.841814] page_type: 0xffffffff() [ 42.842079] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 42.842622] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ead2101 [ 42.843165] page dumped because: kasan: bad access detected [ 42.843551] [ 42.843688] Memory state around the buggy address: [ 42.844037] ffff88800ed17900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.844544] ffff88800ed17980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 42.845062] >ffff88800ed17a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.845575] ^ [ 42.845995] ffff88800ed17a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 42.846511] ffff88800ed17b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.847027] ================================================================== [ 42.847656] Disabling lock debugging due to kernel taint [ 44.804724] BUG: Bad rss-counter state mm:00000000a6916136 type:MM_FILEPAGES val:33 [ 44.805961] BUG: Bad rss-counter state mm:00000000a6916136 type:MM_ANONPAGES val:22 [ 45.270445] BUG: Bad rss-counter state mm:00000000524acc1e type:MM_FILEPAGES val:33 [ 45.271729] BUG: Bad rss-counter state mm:00000000524acc1e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19472' (ECDSA) to the list of known hosts. 2023/06/20 00:43:56 fuzzer started 2023/06/20 00:43:56 dialing manager at localhost:44161 2023/06/20 00:43:56 checking machine... 2023/06/20 00:43:56 checking revisions... [ 46.025539] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:43:57 testing simple program... [ 46.077278] cgroup: Unknown subsys name 'net' [ 46.143522] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:43:52 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000246 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff8452fffc RBP=ffffffff856d8220 RSP=ffff88801652f7b8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888008fce280 R13=0000000000000000 R14=0000000000082cc0 R15=0000000000082cc0 RIP=ffffffff8450b935 RFL=00000046 [---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 00007f39ef446900 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=00007fff810ff000 CR3=0000000016d6c000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888015afb680 RSI=ffffffff818fa42d RDI=0000000000000005 RBP=ffff88800d58caa0 RSP=ffff8880142ef800 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=1ffff1100285df0b R13=ffff88800d58cab0 R14=ffff88800d58cad0 R15=ffff88800d58caa8 RIP=ffffffff818fa42d RFL=00000293 [--S-A-C] 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 00007fbe52ed4900 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=00007ffd7504eb48 CR3=0000000009788000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=93b549a19920cdb500000000000ae988 XMM05=1319e678c5640f8a0000000000134e80 XMM06=e8008b1642ea3e600000000000134de8 XMM07=58f17c1affdc82d60000000000125868 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000