syzkaller login: [ 106.903345] BUG: Bad rss-counter state mm:00000000f9e96687 type:MM_FILEPAGES val:33 [ 106.904591] BUG: Bad rss-counter state mm:00000000f9e96687 type:MM_ANONPAGES val:22 [ 106.931673] ================================================================== [ 106.932409] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 106.933139] Read of size 8 at addr ffff8880169cf310 by task sshd/227 [ 106.933732] [ 106.933897] CPU: 0 PID: 227 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 106.934684] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 106.935432] Call Trace: [ 106.935683] [ 106.935901] dump_stack_lvl+0x91/0xf0 [ 106.936277] print_report+0xcc/0x620 [ 106.936650] ? __virt_addr_valid+0x102/0x340 [ 106.937074] ? vma_interval_tree_remove+0xc75/0xec0 [ 106.937554] ? vma_interval_tree_remove+0xc75/0xec0 [ 106.938033] kasan_report+0xbe/0xf0 [ 106.938411] ? vma_interval_tree_remove+0xc75/0xec0 [ 106.938893] vma_interval_tree_remove+0xc75/0xec0 [ 106.939371] vma_prepare+0xc54/0x11a0 [ 106.939738] __split_vma+0x5af/0x950 [ 106.940101] ? __pfx___split_vma+0x10/0x10 [ 106.940506] ? find_held_lock+0x2c/0x110 [ 106.940912] do_vmi_align_munmap+0x2ba/0x11f0 [ 106.941347] ? lock_is_held_type+0x9f/0x120 [ 106.941761] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 106.942225] ? mtree_range_walk+0x632/0x900 [ 106.942648] ? mas_walk+0x5c7/0x7c0 [ 106.943037] do_vmi_munmap+0x1f1/0x2b0 [ 106.943418] mmap_region+0x1f9/0x2660 [ 106.943770] ? vm_mmap_pgoff+0x15c/0x3a0 [ 106.944289] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 106.945166] ? __pfx_lock_acquire+0x10/0x10 [ 106.945823] ? __pfx_mmap_region+0x10/0x10 [ 106.946493] ? security_mmap_addr+0x7d/0xa0 [ 106.947169] ? get_unmapped_area+0x1f5/0x3f0 [ 106.947851] do_mmap+0x854/0xf00 [ 106.948403] vm_mmap_pgoff+0x1a6/0x3a0 [ 106.949005] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 106.949701] ksys_mmap_pgoff+0x3af/0x500 [ 106.950342] do_syscall_64+0x3f/0x90 [ 106.950943] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 106.951769] RIP: 0033:0x7f59ac018d82 [ 106.952347] 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 [ 106.955006] RSP: 002b:00007fff539b52d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 106.956057] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f59ac018d82 [ 106.956929] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f59ab452000 [ 106.957803] RBP: 00007f59ab452000 R08: 0000000000000009 R09: 0000000000001000 [ 106.958660] R10: 0000000000000812 R11: 0000000000000206 R12: 00005587fe94ff60 [ 106.959536] R13: 00007fff539b52f0 R14: 00007fff539b5320 R15: 00007fff539b5680 [ 106.960407] [ 106.960702] [ 106.960914] Allocated by task 220: [ 106.961375] kasan_save_stack+0x22/0x50 [ 106.961885] kasan_set_track+0x25/0x30 [ 106.962398] __kasan_slab_alloc+0x59/0x70 [ 106.962931] kmem_cache_alloc+0x16b/0x370 [ 106.963464] vm_area_dup+0x20/0x160 [ 106.963923] __split_vma+0x170/0x950 [ 106.964399] split_vma+0xc6/0x110 [ 106.964848] mprotect_fixup+0x8d2/0xb30 [ 106.965359] do_mprotect_pkey+0x87e/0xd40 [ 106.965886] __x64_sys_mprotect+0x78/0xc0 [ 106.966437] do_syscall_64+0x3f/0x90 [ 106.966939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 106.967598] [ 106.967817] Freed by task 220: [ 106.968209] kasan_save_stack+0x22/0x50 [ 106.968723] kasan_set_track+0x25/0x30 [ 106.969213] kasan_save_free_info+0x2b/0x50 [ 106.969754] __kasan_slab_free+0x10a/0x190 [ 106.970300] kmem_cache_free+0x10d/0x4d0 [ 106.970823] rcu_core+0x8c8/0x2860 [ 106.971276] __do_softirq+0x1b7/0x7d4 [ 106.971777] [ 106.971993] Last potentially related work creation: [ 106.972594] kasan_save_stack+0x22/0x50 [ 106.973100] __kasan_record_aux_stack+0x8e/0xa0 [ 106.973683] __call_rcu_common.constprop.0+0x6a/0xb90 [ 106.974346] remove_vma+0x139/0x170 [ 106.974815] do_vmi_align_munmap+0xd4a/0x11f0 [ 106.975397] do_vmi_munmap+0x1f1/0x2b0 [ 106.975889] __vm_munmap+0x138/0x3a0 [ 106.976376] __x64_sys_munmap+0x59/0x80 [ 106.976878] do_syscall_64+0x3f/0x90 [ 106.977362] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 106.978007] [ 106.978224] The buggy address belongs to the object at ffff8880169cf2b8 [ 106.978224] which belongs to the cache vm_area_struct of size 168 [ 106.979726] The buggy address is located 88 bytes inside of [ 106.979726] freed 168-byte region [ffff8880169cf2b8, ffff8880169cf360) [ 106.981136] [ 106.981377] The buggy address belongs to the physical page: [ 106.982031] page:000000008f5d7676 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x169cf [ 106.983145] memcg:ffff888016e22a01 [ 106.983584] flags: 0x100000000000200(slab|node=0|zone=1) [ 106.984222] page_type: 0xffffffff() [ 106.984687] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 106.985617] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016e22a01 [ 106.986549] page dumped because: kasan: bad access detected [ 106.987229] [ 106.987458] Memory state around the buggy address: [ 106.988042] ffff8880169cf200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 106.988908] ffff8880169cf280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 106.989776] >ffff8880169cf300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 106.990656] ^ [ 106.991143] ffff8880169cf380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 106.992019] ffff8880169cf400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 106.992880] ================================================================== [ 106.994164] Disabling lock debugging due to kernel taint [ 109.011335] BUG: Bad rss-counter state mm:000000006fad56f0 type:MM_FILEPAGES val:33 [ 109.012561] BUG: Bad rss-counter state mm:000000006fad56f0 type:MM_ANONPAGES val:22 [ 109.583071] BUG: Bad rss-counter state mm:00000000ea656fd5 type:MM_FILEPAGES val:33 [ 109.584312] BUG: Bad rss-counter state mm:00000000ea656fd5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38173' (ECDSA) to the list of known hosts. 2023/06/20 02:25:40 fuzzer started 2023/06/20 02:25:41 dialing manager at localhost:44161 2023/06/20 02:25:41 checking machine... 2023/06/20 02:25:41 checking revisions... [ 110.228406] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:25:41 testing simple program... [ 110.264633] cgroup: Unknown subsys name 'net' [ 110.317130] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:24:29 Registers: info registers vcpu 0 RAX=1ffff11001b9bdb5 RBX=ffff88800dcded78 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800dcdeda8 RBP=ffff888013d2f8f8 RSP=ffff88800e9df828 R8 =0000000000000001 R9 =ffffed1001d3bef9 R10=0000000000000003 R11=0030733a745f6c65 R12=dffffc0000000000 R13=ffff8880169e0880 R14=ffffffff81eeb050 R15=1ffff11001d3bf1d RIP=ffffffff81846362 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 00007fc5e48ff700 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=00007f8b8c7f8080 CR3=0000000016780000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3633325b646873732030343a3532 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363139 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff85d3d010 RBX=0000000000000001 RCX=ffffffff85d3d010 RDX=dffffc0000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8118dbb1 RSP=ffff88801805f540 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=000024e4000024e4 R12=0000000000000001 R13=0000000000000000 R14=ffff88801805f728 R15=ffff8880102aba00 RIP=ffffffff812d12fa RFL=00000002 [-------] 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 00007fcc9d5ca900 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=00007ffe7cf8b000 CR3=000000001a0d2000 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=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