syzkaller login: [ 30.304833] BUG: Bad rss-counter state mm:0000000089e74059 type:MM_FILEPAGES val:33 [ 30.305663] BUG: Bad rss-counter state mm:0000000089e74059 type:MM_ANONPAGES val:22 [ 30.483033] ================================================================== [ 30.483579] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.484168] Read of size 8 at addr ffff88800eed35c8 by task sshd/219 [ 30.484598] [ 30.488828] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.489347] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.489903] Call Trace: [ 30.490080] [ 30.490238] dump_stack_lvl+0x91/0xf0 [ 30.490554] print_report+0xcc/0x620 [ 30.490823] ? __virt_addr_valid+0x102/0x340 [ 30.491144] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.491497] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.491842] kasan_report+0xbe/0xf0 [ 30.492108] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.492461] vma_interval_tree_remove+0xc75/0xec0 [ 30.492829] vma_prepare+0xc54/0x11a0 [ 30.493114] __split_vma+0x5af/0x950 [ 30.493376] ? __pfx___split_vma+0x10/0x10 [ 30.493677] ? find_held_lock+0x2c/0x110 [ 30.493970] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.494293] ? lock_is_held_type+0x9f/0x120 [ 30.494600] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.494944] ? mtree_range_walk+0x632/0x900 [ 30.495251] ? mas_walk+0x5c7/0x7c0 [ 30.495521] do_vmi_munmap+0x1f1/0x2b0 [ 30.495802] mmap_region+0x1f9/0x2660 [ 30.496072] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.496366] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.496784] ? __pfx_lock_acquire+0x10/0x10 [ 30.497086] ? __pfx_mmap_region+0x10/0x10 [ 30.497388] ? security_mmap_addr+0x7d/0xa0 [ 30.497692] ? get_unmapped_area+0x1f5/0x3f0 [ 30.497997] do_mmap+0x854/0xf00 [ 30.498249] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.498533] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.498843] ksys_mmap_pgoff+0x3af/0x500 [ 30.499130] do_syscall_64+0x3f/0x90 [ 30.499407] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.499775] RIP: 0033:0x7f5e21213d82 [ 30.500029] 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 [ 30.501239] RSP: 002b:00007fff1f0af9d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.501744] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5e21213d82 [ 30.502219] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5e2064d000 [ 30.502690] RBP: 00007f5e2064d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.503165] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559f9a6b5ec0 [ 30.503648] R13: 00007fff1f0af9f0 R14: 00007fff1f0afa20 R15: 00007fff1f0afd80 [ 30.504128] [ 30.504289] [ 30.504415] Allocated by task 212: [ 30.504659] kasan_save_stack+0x22/0x50 [ 30.504978] kasan_set_track+0x25/0x30 [ 30.505261] __kasan_slab_alloc+0x59/0x70 [ 30.505552] kmem_cache_alloc+0x16b/0x370 [ 30.505845] vm_area_dup+0x20/0x160 [ 30.506107] __split_vma+0x170/0x950 [ 30.506365] split_vma+0xc6/0x110 [ 30.506621] mprotect_fixup+0x8d2/0xb30 [ 30.506908] do_mprotect_pkey+0x87e/0xd40 [ 30.507195] __x64_sys_mprotect+0x78/0xc0 [ 30.507493] do_syscall_64+0x3f/0x90 [ 30.507764] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.508127] [ 30.508253] Freed by task 212: [ 30.508473] kasan_save_stack+0x22/0x50 [ 30.512877] kasan_set_track+0x25/0x30 [ 30.513161] kasan_save_free_info+0x2b/0x50 [ 30.513465] __kasan_slab_free+0x10a/0x190 [ 30.513772] kmem_cache_free+0x10d/0x4d0 [ 30.514061] rcu_core+0x8c8/0x2860 [ 30.514309] __do_softirq+0x1b7/0x7d4 [ 30.514575] [ 30.514698] Last potentially related work creation: [ 30.515022] kasan_save_stack+0x22/0x50 [ 30.515338] __kasan_record_aux_stack+0x8e/0xa0 [ 30.515710] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.516124] remove_vma+0x139/0x170 [ 30.516418] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.516788] do_vmi_munmap+0x1f1/0x2b0 [ 30.517112] __vm_munmap+0x138/0x3a0 [ 30.517417] __x64_sys_munmap+0x59/0x80 [ 30.517739] do_syscall_64+0x3f/0x90 [ 30.518046] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.518461] [ 30.518604] The buggy address belongs to the object at ffff88800eed3570 [ 30.518604] which belongs to the cache vm_area_struct of size 168 [ 30.519525] The buggy address is located 88 bytes inside of [ 30.519525] freed 168-byte region [ffff88800eed3570, ffff88800eed3618) [ 30.520367] [ 30.520489] The buggy address belongs to the physical page: [ 30.520890] page:000000000040c6b7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeed3 [ 30.521528] memcg:ffff88800fccf201 [ 30.521804] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.522220] page_type: 0xffffffff() [ 30.522514] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.523104] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fccf201 [ 30.523684] page dumped because: kasan: bad access detected [ 30.524092] [ 30.524211] Memory state around the buggy address: [ 30.524544] ffff88800eed3480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.525069] ffff88800eed3500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.525550] >ffff88800eed3580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.526025] ^ [ 30.526401] ffff88800eed3600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.526878] ffff88800eed3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.527353] ================================================================== [ 30.528250] Disabling lock debugging due to kernel taint [ 38.853200] BUG: Bad rss-counter state mm:00000000683ca938 type:MM_FILEPAGES val:33 [ 38.853793] BUG: Bad rss-counter state mm:00000000683ca938 type:MM_ANONPAGES val:22 [ 39.577438] BUG: Bad rss-counter state mm:00000000b0e99647 type:MM_FILEPAGES val:33 [ 39.578075] BUG: Bad rss-counter state mm:00000000b0e99647 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33904' (ECDSA) to the list of known hosts. 2023/06/21 10:12:48 fuzzer started 2023/06/21 10:12:49 dialing manager at localhost:36067 2023/06/21 10:12:49 checking machine... 2023/06/21 10:12:49 checking revisions... [ 40.526537] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:12:49 testing simple program... [ 40.586909] cgroup: Unknown subsys name 'net' [ 40.651814] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:12:48 Registers: info registers vcpu 0 RAX=ffffffff818076a3 RBX=0000000000000001 RCX=ffffffff86138046 RDX=dffffc0000000000 RSI=ffff88800eee7838 RDI=1ffff11001ddce9f RBP=ffff88800eee74f8 RSP=ffff88800eee7430 R8 =ffffffff8613804a R9 =ffff88800eee74e0 R10=0000000000038001 R11=0000000000020b35 R12=ffff88800eee7500 R13=ffff88800eee74e8 R14=ffff88800eee7840 R15=ffff88800eee74a0 RIP=ffffffff81131085 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 00007f7c8d520900 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=00007f7c8d5206f8 CR3=000000000ea44000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888015a98400 RBX=ffff8880084c6140 RCX=0000000000000000 RDX=000000000000000f RSI=ffff888015a98600 RDI=ffff8880084c6140 RBP=ffff8880084c6140 RSP=ffff88800fca7940 R8 =0000000000000002 R9 =0000000000000000 R10=ffff888015a98500 R11=0000000000000001 R12=ffff888015a98600 R13=ffff888015a98400 R14=0000000000000001 R15=00000000ffffffff RIP=ffffffff8180c920 RFL=00000296 [--S-AP-] 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 00007f7c8d520900 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=00007f7c8d94ff50 CR3=0000000019968000 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=0000000000000002fffffffe7ffbfeff XMM01=00000000000000008000000000000006 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000