syzkaller login: [ 38.839649] BUG: Bad rss-counter state mm:0000000063e50c65 type:MM_FILEPAGES val:33 [ 38.840844] BUG: Bad rss-counter state mm:0000000063e50c65 type:MM_ANONPAGES val:22 [ 38.879326] ================================================================== [ 38.880385] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.881498] Read of size 8 at addr ffff888016a55228 by task sshd/225 [ 38.882411] [ 38.882632] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.883614] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.884756] Call Trace: [ 38.885074] [ 38.885406] dump_stack_lvl+0x91/0xf0 [ 38.885901] print_report+0xcc/0x620 [ 38.886382] ? __virt_addr_valid+0x102/0x340 [ 38.887045] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.887671] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.888290] kasan_report+0xbe/0xf0 [ 38.888770] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.889529] vma_interval_tree_remove+0xc75/0xec0 [ 38.890140] vma_prepare+0xc54/0x11a0 [ 38.890684] __split_vma+0x5af/0x950 [ 38.891284] ? __pfx___split_vma+0x10/0x10 [ 38.891884] ? find_held_lock+0x2c/0x110 [ 38.892459] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.893070] ? lock_is_held_type+0x9f/0x120 [ 38.893737] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.894493] ? mtree_range_walk+0x632/0x900 [ 38.895046] ? mas_walk+0x5c7/0x7c0 [ 38.895527] do_vmi_munmap+0x1f1/0x2b0 [ 38.896028] mmap_region+0x1f9/0x2660 [ 38.896504] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.897018] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.897728] ? __pfx_lock_acquire+0x10/0x10 [ 38.898258] ? __pfx_mmap_region+0x10/0x10 [ 38.898787] ? security_mmap_addr+0x7d/0xa0 [ 38.899332] ? get_unmapped_area+0x1f5/0x3f0 [ 38.899882] do_mmap+0x854/0xf00 [ 38.900317] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.900805] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.901375] ksys_mmap_pgoff+0x3af/0x500 [ 38.901886] do_syscall_64+0x3f/0x90 [ 38.902366] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.903014] RIP: 0033:0x7fed2e111d82 [ 38.903482] 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 [ 38.905587] RSP: 002b:00007fffa25f04e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.906484] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fed2e111d82 [ 38.907342] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fed2d54b000 [ 38.908246] RBP: 00007fed2d54b000 R08: 0000000000000009 R09: 0000000000001000 [ 38.909101] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560b5c8f2b20 [ 38.909946] R13: 00007fffa25f0500 R14: 00007fffa25f0530 R15: 00007fffa25f0890 [ 38.910813] [ 38.911107] [ 38.911341] Allocated by task 218: [ 38.911772] kasan_save_stack+0x22/0x50 [ 38.912280] kasan_set_track+0x25/0x30 [ 38.912771] __kasan_slab_alloc+0x59/0x70 [ 38.913290] kmem_cache_alloc+0x16b/0x370 [ 38.913806] vm_area_dup+0x20/0x160 [ 38.914258] __split_vma+0x170/0x950 [ 38.914732] split_vma+0xc6/0x110 [ 38.915170] mprotect_fixup+0x8d2/0xb30 [ 38.915692] do_mprotect_pkey+0x87e/0xd40 [ 38.916204] __x64_sys_mprotect+0x78/0xc0 [ 38.916728] do_syscall_64+0x3f/0x90 [ 38.917203] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.917841] [ 38.918057] Freed by task 218: [ 38.918444] kasan_save_stack+0x22/0x50 [ 38.918944] kasan_set_track+0x25/0x30 [ 38.919438] kasan_save_free_info+0x2b/0x50 [ 38.919963] __kasan_slab_free+0x10a/0x190 [ 38.920487] kmem_cache_free+0x10d/0x4d0 [ 38.920998] rcu_core+0x8c8/0x2860 [ 38.921441] __do_softirq+0x1b7/0x7d4 [ 38.921916] [ 38.922135] Last potentially related work creation: [ 38.922711] kasan_save_stack+0x22/0x50 [ 38.923256] __kasan_record_aux_stack+0x8e/0xa0 [ 38.923846] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.924480] remove_vma+0x139/0x170 [ 38.924935] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.925489] do_vmi_munmap+0x1f1/0x2b0 [ 38.925969] __vm_munmap+0x138/0x3a0 [ 38.926435] __x64_sys_munmap+0x59/0x80 [ 38.926929] do_syscall_64+0x3f/0x90 [ 38.927415] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.928062] [ 38.928273] The buggy address belongs to the object at ffff888016a551d0 [ 38.928273] which belongs to the cache vm_area_struct of size 168 [ 38.929724] The buggy address is located 88 bytes inside of [ 38.929724] freed 168-byte region [ffff888016a551d0, ffff888016a55278) [ 38.931106] [ 38.931341] The buggy address belongs to the physical page: [ 38.931993] page:000000002c26eb26 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a55 [ 38.933080] memcg:ffff88800997a101 [ 38.933507] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.934203] page_type: 0xffffffff() [ 38.934653] raw: 0100000000000200 ffff8880087a0c80 ffffea0000372600 dead000000000003 [ 38.935574] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800997a101 [ 38.936470] page dumped because: kasan: bad access detected [ 38.937134] [ 38.937350] Memory state around the buggy address: [ 38.937930] ffff888016a55100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.938773] ffff888016a55180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.939642] >ffff888016a55200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.940492] ^ [ 38.941051] ffff888016a55280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.941900] ffff888016a55300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.942749] ================================================================== [ 38.943671] Disabling lock debugging due to kernel taint [ 40.881607] BUG: Bad rss-counter state mm:00000000741b1583 type:MM_FILEPAGES val:33 [ 40.882770] BUG: Bad rss-counter state mm:00000000741b1583 type:MM_ANONPAGES val:22 [ 41.288676] BUG: Bad rss-counter state mm:000000003014d544 type:MM_FILEPAGES val:33 [ 41.290070] BUG: Bad rss-counter state mm:000000003014d544 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18674' (ECDSA) to the list of known hosts. 2023/06/20 17:11:39 fuzzer started 2023/06/20 17:11:39 dialing manager at localhost:36067 2023/06/20 17:11:39 checking machine... 2023/06/20 17:11:39 checking revisions... [ 41.963813] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:11:39 testing simple program... [ 42.008547] cgroup: Unknown subsys name 'net' [ 42.044878] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:11:38 Registers: info registers vcpu 0 RAX=ffff888016f051c0 RBX=ffff88806ce09b10 RCX=ffffffff81132ffe RDX=ffff88806ce09a28 RSI=0000000000000000 RDI=ffff88806ce09ae8 RBP=ffff888016f051c0 RSP=ffff88806ce09a28 R8 =0000000000000540 R9 =0000000000000000 R10=ffff88806ce09a78 R11=00000000000b6a61 R12=0000000000000000 R13=ffff88806ce09aa0 R14=ffff88806ce09ac0 R15=ffff88806ce09a78 RIP=ffffffff81133010 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 00007f5f6791d900 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=00007fff60779000 CR3=0000000018624000 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=ffffffff815a65ac RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff815a29d4 RDI=ffffffff852bf9a0 RBP=ffff88800d03fd28 RSP=ffff88800d03fc60 R8 =0000000000000004 R9 =000000007fff0000 R10=000000007fff0000 R11=0000000000000000 R12=00000000000000ac R13=ffff88800d03fd28 R14=00000000000000ac R15=ffffc900006a5050 RIP=ffffffff815a65b0 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 00007f4fb42a28c0 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=00007fe199e5cf40 CR3=000000000ee74000 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=00000000000000000000000000000000 XMM02=ffffffffffffffff00000000000000ff XMM03=696e656420737365636341002f737973 XMM04=00000002000000000000559ba25f28d0 XMM05=00000000000000000000000000000000 XMM06=0000559ba25c626000000000ffffffff XMM07=00000000000000000000000000000000 XMM08=616c702f736563697665642f7379732f XMM09=00000000000000000000000000000000 XMM10=00000020000000000000002000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000