syzkaller login: [ 30.666555] BUG: Bad rss-counter state mm:0000000030a5e314 type:MM_FILEPAGES val:33 [ 30.667941] BUG: Bad rss-counter state mm:0000000030a5e314 type:MM_ANONPAGES val:22 [ 30.767391] ================================================================== [ 30.768452] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.769557] Read of size 8 at addr ffff88801592c058 by task sshd/218 [ 30.770448] [ 30.770669] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.771534] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.772601] Call Trace: [ 30.772929] [ 30.773235] dump_stack_lvl+0x91/0xf0 [ 30.773744] print_report+0xcc/0x620 [ 30.774236] ? __virt_addr_valid+0x102/0x340 [ 30.774809] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.775451] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.776082] kasan_report+0xbe/0xf0 [ 30.776576] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.777236] vma_interval_tree_remove+0xc75/0xec0 [ 30.777846] vma_prepare+0xc54/0x11a0 [ 30.778327] __split_vma+0x5af/0x950 [ 30.778806] ? __pfx___split_vma+0x10/0x10 [ 30.779338] ? find_held_lock+0x2c/0x110 [ 30.779862] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.780446] ? lock_is_held_type+0x9f/0x120 [ 30.780998] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.781630] ? mtree_range_walk+0x632/0x900 [ 30.782184] ? mas_walk+0x5c7/0x7c0 [ 30.782666] do_vmi_munmap+0x1f1/0x2b0 [ 30.783165] mmap_region+0x1f9/0x2660 [ 30.783670] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.784196] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.784906] ? __pfx_lock_acquire+0x10/0x10 [ 30.785443] ? __pfx_mmap_region+0x10/0x10 [ 30.785972] ? security_mmap_addr+0x7d/0xa0 [ 30.786495] ? get_unmapped_area+0x1f5/0x3f0 [ 30.787042] do_mmap+0x854/0xf00 [ 30.787475] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.787969] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.788533] ksys_mmap_pgoff+0x3af/0x500 [ 30.789038] do_syscall_64+0x3f/0x90 [ 30.789533] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.790184] RIP: 0033:0x7f6783437d82 [ 30.790666] 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 [ 30.792878] RSP: 002b:00007ffcc4a8d8f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.793830] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6783437d82 [ 30.794669] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6782871000 [ 30.795526] RBP: 00007f6782871000 R08: 0000000000000009 R09: 0000000000001000 [ 30.796375] R10: 0000000000000812 R11: 0000000000000206 R12: 00005629215a8ec0 [ 30.797294] R13: 00007ffcc4a8d910 R14: 00007ffcc4a8d940 R15: 00007ffcc4a8dca0 [ 30.798181] [ 30.798481] [ 30.798706] Allocated by task 211: [ 30.799155] kasan_save_stack+0x22/0x50 [ 30.799681] kasan_set_track+0x25/0x30 [ 30.800178] __kasan_slab_alloc+0x59/0x70 [ 30.800701] kmem_cache_alloc+0x16b/0x370 [ 30.801223] vm_area_dup+0x20/0x160 [ 30.801679] __split_vma+0x170/0x950 [ 30.802150] split_vma+0xc6/0x110 [ 30.802591] mprotect_fixup+0x8d2/0xb30 [ 30.803095] do_mprotect_pkey+0x87e/0xd40 [ 30.803614] __x64_sys_mprotect+0x78/0xc0 [ 30.804132] do_syscall_64+0x3f/0x90 [ 30.804616] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.805302] [ 30.805528] Freed by task 211: [ 30.805929] kasan_save_stack+0x22/0x50 [ 30.806444] kasan_set_track+0x25/0x30 [ 30.806963] kasan_save_free_info+0x2b/0x50 [ 30.807498] __kasan_slab_free+0x10a/0x190 [ 30.808036] kmem_cache_free+0x10d/0x4d0 [ 30.808551] rcu_core+0x8c8/0x2860 [ 30.808994] __do_softirq+0x1b7/0x7d4 [ 30.809485] [ 30.809701] Last potentially related work creation: [ 30.810287] kasan_save_stack+0x22/0x50 [ 30.810794] __kasan_record_aux_stack+0x8e/0xa0 [ 30.811387] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.812057] remove_vma+0x139/0x170 [ 30.812524] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.813080] do_vmi_munmap+0x1f1/0x2b0 [ 30.813580] __vm_munmap+0x138/0x3a0 [ 30.814050] __x64_sys_munmap+0x59/0x80 [ 30.814553] do_syscall_64+0x3f/0x90 [ 30.815028] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.815687] [ 30.815903] The buggy address belongs to the object at ffff88801592c000 [ 30.815903] which belongs to the cache vm_area_struct of size 168 [ 30.817391] The buggy address is located 88 bytes inside of [ 30.817391] freed 168-byte region [ffff88801592c000, ffff88801592c0a8) [ 30.818808] [ 30.819026] The buggy address belongs to the physical page: [ 30.819693] page:000000001e677a4c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1592c [ 30.820795] memcg:ffff8880198dcb01 [ 30.821230] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.821879] page_type: 0xffffffff() [ 30.822331] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.823245] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880198dcb01 [ 30.824145] page dumped because: kasan: bad access detected [ 30.824806] [ 30.825020] Memory state around the buggy address: [ 30.825610] ffff88801592bf00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 30.826472] ffff88801592bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.827320] >ffff88801592c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.828190] ^ [ 30.828919] ffff88801592c080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.829796] ffff88801592c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.830650] ================================================================== [ 30.831798] Disabling lock debugging due to kernel taint [ 32.943022] BUG: Bad rss-counter state mm:00000000ef5b12fc type:MM_FILEPAGES val:33 [ 32.944181] BUG: Bad rss-counter state mm:00000000ef5b12fc type:MM_ANONPAGES val:22 [ 33.355351] BUG: Bad rss-counter state mm:00000000ff6ad453 type:MM_FILEPAGES val:33 [ 33.356368] BUG: Bad rss-counter state mm:00000000ff6ad453 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27355' (ECDSA) to the list of known hosts. 2023/06/20 19:15:10 fuzzer started 2023/06/20 19:15:10 dialing manager at localhost:36067 2023/06/20 19:15:10 checking machine... 2023/06/20 19:15:10 checking revisions... [ 34.116818] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:15:10 testing simple program... [ 34.166778] cgroup: Unknown subsys name 'net' [ 34.208060] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:15:10 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=000000000000231c RCX=ffffffff8215b3e9 RDX=ffff8880159d3680 RSI=0000000000000000 RDI=0000000000000001 RBP=0000000000000005 RSP=ffff88801c5c7928 R8 =0000000000000001 R9 =0000000000000005 R10=0000000000000005 R11=0000000000000000 R12=ffff888016be4f00 R13=ffff88801c5c7d90 R14=0000000000000024 R15=ffff88801c5c7d90 RIP=ffffffff814c086b 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 00007f958bfcd900 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=00007ffec2199000 CR3=000000000eb66000 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=dffffc0000000000 RBX=ffff8880193abe20 RCX=0000000000000000 RDX=1ffff110032757c9 RSI=ffffffff816b6572 RDI=ffff8880193abe48 RBP=ffff8880193abe20 RSP=ffff888008d7fa48 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000128 R12=ffff8880193ac048 R13=ffff8880193ac200 R14=0000000000000001 R15=ffff8880193ac050 RIP=ffffffff816b658b 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 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=00007ffd28a576e8 CR3=0000000005482000 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=00007fe51bcca5100000556381401790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000