syzkaller login: [ 31.499667] BUG: Bad rss-counter state mm:000000008ac631b3 type:MM_FILEPAGES val:33 [ 31.500476] BUG: Bad rss-counter state mm:000000008ac631b3 type:MM_ANONPAGES val:22 [ 31.627538] ================================================================== [ 31.628163] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.628730] Read of size 8 at addr ffff88801a06fc20 by task sshd/220 [ 31.629197] [ 31.629336] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.629879] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.630505] Call Trace: [ 31.630711] [ 31.630896] dump_stack_lvl+0x91/0xf0 [ 31.631225] print_report+0xcc/0x620 [ 31.631620] ? __virt_addr_valid+0x102/0x340 [ 31.632176] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.632606] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.633026] kasan_report+0xbe/0xf0 [ 31.633358] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.633793] vma_interval_tree_remove+0xc75/0xec0 [ 31.634197] vma_prepare+0xc54/0x11a0 [ 31.634524] __split_vma+0x5af/0x950 [ 31.634822] ? __pfx___split_vma+0x10/0x10 [ 31.635186] ? find_held_lock+0x2c/0x110 [ 31.635553] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.635920] ? lock_is_held_type+0x9f/0x120 [ 31.636257] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.636636] ? mtree_range_walk+0x632/0x900 [ 31.636974] ? mas_walk+0x5c7/0x7c0 [ 31.637264] do_vmi_munmap+0x1f1/0x2b0 [ 31.637563] mmap_region+0x1f9/0x2660 [ 31.637858] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.638192] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.638656] ? __pfx_lock_acquire+0x10/0x10 [ 31.639009] ? __pfx_mmap_region+0x10/0x10 [ 31.639410] ? security_mmap_addr+0x7d/0xa0 [ 31.639749] ? get_unmapped_area+0x1f5/0x3f0 [ 31.640103] do_mmap+0x854/0xf00 [ 31.640383] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.640694] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.641036] ksys_mmap_pgoff+0x3af/0x500 [ 31.641340] do_syscall_64+0x3f/0x90 [ 31.641643] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.642050] RIP: 0033:0x7f808e4d2d82 [ 31.642349] 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 [ 31.643721] RSP: 002b:00007ffdd222a128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.644290] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f808e4d2d82 [ 31.644796] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f808d90c000 [ 31.645316] RBP: 00007f808d90c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.645846] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a26574fec0 [ 31.646413] R13: 00007ffdd222a140 R14: 00007ffdd222a170 R15: 00007ffdd222a4d0 [ 31.646971] [ 31.647155] [ 31.647328] Allocated by task 213: [ 31.647605] kasan_save_stack+0x22/0x50 [ 31.647928] kasan_set_track+0x25/0x30 [ 31.648251] __kasan_slab_alloc+0x59/0x70 [ 31.648582] kmem_cache_alloc+0x16b/0x370 [ 31.648914] vm_area_dup+0x20/0x160 [ 31.649203] __split_vma+0x170/0x950 [ 31.649497] split_vma+0xc6/0x110 [ 31.649772] mprotect_fixup+0x8d2/0xb30 [ 31.650082] do_mprotect_pkey+0x87e/0xd40 [ 31.650400] __x64_sys_mprotect+0x78/0xc0 [ 31.650732] do_syscall_64+0x3f/0x90 [ 31.651041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.651522] [ 31.651660] Freed by task 203: [ 31.651904] kasan_save_stack+0x22/0x50 [ 31.652213] kasan_set_track+0x25/0x30 [ 31.652510] kasan_save_free_info+0x2b/0x50 [ 31.652835] __kasan_slab_free+0x10a/0x190 [ 31.653174] kmem_cache_free+0x10d/0x4d0 [ 31.653489] rcu_core+0x8c8/0x2860 [ 31.653770] __do_softirq+0x1b7/0x7d4 [ 31.654063] [ 31.654196] Last potentially related work creation: [ 31.654547] kasan_save_stack+0x22/0x50 [ 31.654863] __kasan_record_aux_stack+0x8e/0xa0 [ 31.655233] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.655676] remove_vma+0x139/0x170 [ 31.655959] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.656326] do_vmi_munmap+0x1f1/0x2b0 [ 31.656637] __vm_munmap+0x138/0x3a0 [ 31.656939] __x64_sys_munmap+0x59/0x80 [ 31.657249] do_syscall_64+0x3f/0x90 [ 31.657542] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.657930] [ 31.658058] The buggy address belongs to the object at ffff88801a06fbc8 [ 31.658058] which belongs to the cache vm_area_struct of size 168 [ 31.658952] The buggy address is located 88 bytes inside of [ 31.658952] freed 168-byte region [ffff88801a06fbc8, ffff88801a06fc70) [ 31.659863] [ 31.659998] The buggy address belongs to the physical page: [ 31.660395] page:000000004a24c27e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a06f [ 31.661071] memcg:ffff8880159be901 [ 31.661335] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.661719] page_type: 0xffffffff() [ 31.661997] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.662559] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880159be901 [ 31.663126] page dumped because: kasan: bad access detected [ 31.663572] [ 31.663707] Memory state around the buggy address: [ 31.664061] ffff88801a06fb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.664587] ffff88801a06fb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.665104] >ffff88801a06fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.665654] ^ [ 31.665992] ffff88801a06fc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.666521] ffff88801a06fd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.667031] ================================================================== [ 31.667678] Disabling lock debugging due to kernel taint [ 33.089411] BUG: Bad rss-counter state mm:0000000029297e63 type:MM_FILEPAGES val:33 [ 33.090130] BUG: Bad rss-counter state mm:0000000029297e63 type:MM_ANONPAGES val:22 [ 33.473391] BUG: Bad rss-counter state mm:0000000017ecf7a3 type:MM_FILEPAGES val:33 [ 33.474119] BUG: Bad rss-counter state mm:0000000017ecf7a3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8302' (ECDSA) to the list of known hosts. 2023/06/21 09:47:49 fuzzer started 2023/06/21 09:47:49 dialing manager at localhost:36067 2023/06/21 09:47:49 checking machine... 2023/06/21 09:47:49 checking revisions... [ 34.039791] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:47:49 testing simple program... [ 34.078028] cgroup: Unknown subsys name 'net' [ 34.134160] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:47:49 Registers: info registers vcpu 0 RAX=ffffffff86607dd4 RBX=0000000000000001 RCX=0000000000000001 RDX=ffffffff85407f01 RSI=ffffffff85407f00 RDI=ffffffff85407f00 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a08 R8 =ffffffff864bd7f0 R9 =ffff88806ce09ab8 R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffff88806ce09ad8 R13=ffff88806ce09ac0 R14=ffffffff85407f08 R15=ffff88806ce09a78 RIP=ffffffff81131041 RFL=00000202 [-------] 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 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=00007ffc584393d8 CR3=000000000d962000 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=2039343a37343a3930203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a37343a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801a1dcca8 RCX=ffff88801a1dcca8 RDX=0000000080120003 RSI=ffff88801a1dcca8 RDI=ffff8880087a0dc0 RBP=ffff888016907b68 RSP=ffff888016907ad0 R8 =0000000080120002 R9 =0000000000000000 R10=ffffea0000687700 R11=000000008011000e R12=ffffea0000687700 R13=ffff88801a1dcbd0 R14=0000000080120002 R15=ffff8880087a0dc0 RIP=ffffffff81809672 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 00007f6a04253900 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=00007f6a04808650 CR3=000000000dc66000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000