syzkaller login: [ 32.584706] BUG: Bad rss-counter state mm:000000001e8ef282 type:MM_FILEPAGES val:33 [ 32.585714] BUG: Bad rss-counter state mm:000000001e8ef282 type:MM_ANONPAGES val:22 [ 32.767945] ================================================================== [ 32.769018] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.770246] Read of size 8 at addr ffff88800def4a50 by task sshd/219 [ 32.771034] [ 32.771255] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.772133] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.773113] Call Trace: [ 32.773435] [ 32.773722] dump_stack_lvl+0x91/0xf0 [ 32.774211] print_report+0xcc/0x620 [ 32.774700] ? __virt_addr_valid+0x102/0x340 [ 32.775246] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.775883] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.776498] kasan_report+0xbe/0xf0 [ 32.776981] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.777637] vma_interval_tree_remove+0xc75/0xec0 [ 32.778340] vma_prepare+0xc54/0x11a0 [ 32.778904] __split_vma+0x5af/0x950 [ 32.779476] ? __pfx___split_vma+0x10/0x10 [ 32.780089] ? find_held_lock+0x2c/0x110 [ 32.780714] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.781376] ? lock_is_held_type+0x9f/0x120 [ 32.782006] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.782723] ? mtree_range_walk+0x632/0x900 [ 32.783389] ? mas_walk+0x5c7/0x7c0 [ 32.783942] do_vmi_munmap+0x1f1/0x2b0 [ 32.784515] mmap_region+0x1f9/0x2660 [ 32.785080] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.785696] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.786535] ? __pfx_lock_acquire+0x10/0x10 [ 32.787164] ? __pfx_mmap_region+0x10/0x10 [ 32.787797] ? security_mmap_addr+0x7d/0xa0 [ 32.788422] ? get_unmapped_area+0x1f5/0x3f0 [ 32.789066] do_mmap+0x854/0xf00 [ 32.789580] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.790159] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.790826] ksys_mmap_pgoff+0x3af/0x500 [ 32.791429] do_syscall_64+0x3f/0x90 [ 32.791987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.792736] RIP: 0033:0x7fb70e1f3d82 [ 32.793269] 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 [ 32.795751] RSP: 002b:00007ffe86e41568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.796796] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb70e1f3d82 [ 32.797770] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb70d62d000 [ 32.798769] RBP: 00007fb70d62d000 R08: 0000000000000009 R09: 0000000000001000 [ 32.799753] R10: 0000000000000812 R11: 0000000000000206 R12: 00005619297a4b20 [ 32.800732] R13: 00007ffe86e41580 R14: 00007ffe86e415b0 R15: 00007ffe86e41910 [ 32.801727] [ 32.802064] [ 32.802311] Allocated by task 212: [ 32.802808] kasan_save_stack+0x22/0x50 [ 32.803410] kasan_set_track+0x25/0x30 [ 32.803978] __kasan_slab_alloc+0x59/0x70 [ 32.804583] kmem_cache_alloc+0x16b/0x370 [ 32.805176] vm_area_dup+0x20/0x160 [ 32.805704] __split_vma+0x170/0x950 [ 32.806238] split_vma+0xc6/0x110 [ 32.806749] mprotect_fixup+0x8d2/0xb30 [ 32.807342] do_mprotect_pkey+0x87e/0xd40 [ 32.807956] __x64_sys_mprotect+0x78/0xc0 [ 32.808558] do_syscall_64+0x3f/0x90 [ 32.809095] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.809829] [ 32.810075] Freed by task 212: [ 32.810529] kasan_save_stack+0x22/0x50 [ 32.811104] kasan_set_track+0x25/0x30 [ 32.811698] kasan_save_free_info+0x2b/0x50 [ 32.812334] __kasan_slab_free+0x10a/0x190 [ 32.812944] kmem_cache_free+0x10d/0x4d0 [ 32.813527] rcu_core+0x8c8/0x2860 [ 32.814041] __do_softirq+0x1b7/0x7d4 [ 32.814595] [ 32.814845] Last potentially related work creation: [ 32.815544] kasan_save_stack+0x22/0x50 [ 32.816119] __kasan_record_aux_stack+0x8e/0xa0 [ 32.816773] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.817508] remove_vma+0x139/0x170 [ 32.818024] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.818665] do_vmi_munmap+0x1f1/0x2b0 [ 32.819220] __vm_munmap+0x138/0x3a0 [ 32.819763] __x64_sys_munmap+0x59/0x80 [ 32.820333] do_syscall_64+0x3f/0x90 [ 32.820898] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.821672] [ 32.821927] Second to last potentially related work creation: [ 32.822744] kasan_save_stack+0x22/0x50 [ 32.823367] __kasan_record_aux_stack+0x8e/0xa0 [ 32.824055] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.824822] remove_vma+0x139/0x170 [ 32.825363] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.826026] do_vmi_munmap+0x1f1/0x2b0 [ 32.826612] mmap_region+0x1f9/0x2660 [ 32.827175] do_mmap+0x854/0xf00 [ 32.827716] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.828294] ksys_mmap_pgoff+0x3af/0x500 [ 32.828887] do_syscall_64+0x3f/0x90 [ 32.829444] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.830220] [ 32.830477] The buggy address belongs to the object at ffff88800def49f8 [ 32.830477] which belongs to the cache vm_area_struct of size 168 [ 32.832255] The buggy address is located 88 bytes inside of [ 32.832255] freed 168-byte region [ffff88800def49f8, ffff88800def4aa0) [ 32.833934] [ 32.834192] The buggy address belongs to the physical page: [ 32.834988] page:00000000bf604555 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdef4 [ 32.836292] memcg:ffff88800c8d5401 [ 32.836801] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.837618] page_type: 0xffffffff() [ 32.838152] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 32.839240] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c8d5401 [ 32.840333] page dumped because: kasan: bad access detected [ 32.841134] [ 32.841391] Memory state around the buggy address: [ 32.842090] ffff88800def4900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.843110] ffff88800def4980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.844064] >ffff88800def4a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.844910] ^ [ 32.845609] ffff88800def4a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 32.846483] ffff88800def4b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.847337] ================================================================== [ 32.848424] Disabling lock debugging due to kernel taint [ 35.044620] BUG: Bad rss-counter state mm:00000000438f67e3 type:MM_FILEPAGES val:33 [ 35.045340] BUG: Bad rss-counter state mm:00000000438f67e3 type:MM_ANONPAGES val:22 [ 35.501620] BUG: Bad rss-counter state mm:000000002b88229d type:MM_FILEPAGES val:33 [ 35.502873] BUG: Bad rss-counter state mm:000000002b88229d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11604' (ECDSA) to the list of known hosts. 2023/06/19 23:07:25 fuzzer started 2023/06/19 23:07:25 dialing manager at localhost:44161 2023/06/19 23:07:25 checking machine... 2023/06/19 23:07:25 checking revisions... [ 36.102934] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:07:25 testing simple program... [ 36.146007] cgroup: Unknown subsys name 'net' [ 36.195551] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:07:24 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888015c37670 RCX=ffff888015c37648 RDX=0000000000000000 RSI=ffffffff813ad6d0 RDI=ffff888015c3767c RBP=0000000000000000 RSP=ffff888015c37588 R8 =0000000000000001 R9 =ffff888015c375e8 R10=0000000000038001 R11=0000000000003c0d R12=ffff888015c37670 R13=0000000000000000 R14=ffff888015c38000 R15=ffff88800cdff680 RIP=ffffffff813ad514 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 00007fa706710900 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=000055f3ff60d768 CR3=000000000c998000 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=5b9bed65d3689b92114128d2faad3d35 XMM02=000000000011d2f0eff9b2d0a8fce9cb XMM03=000000000011d3c02c67c8bc2e329bc3 XMM04=04da69cdaf74e4e600000000000ae988 XMM05=a7c2482e989e9b540000000000136528 XMM06=39b08826d5622fa800000000001355d0 XMM07=fb795ef6d65770560000000000124838 XMM08=2c67c8bc2e329bc3000000000011d360 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=0000000000000001 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=00007ffd34926d38 CR3=000000000dd60000 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=37303a3332203931206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732035323a3730 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323839 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000