syzkaller login: [ 31.158447] BUG: Bad rss-counter state mm:000000002ac48af3 type:MM_FILEPAGES val:33 [ 31.159673] BUG: Bad rss-counter state mm:000000002ac48af3 type:MM_ANONPAGES val:22 [ 31.197919] ================================================================== [ 31.198952] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.199871] Read of size 8 at addr ffff88800d4b7310 by task sshd/219 [ 31.200613] [ 31.200831] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.201782] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.202739] Call Trace: [ 31.203062] [ 31.203341] dump_stack_lvl+0x91/0xf0 [ 31.203835] print_report+0xcc/0x620 [ 31.204320] ? __virt_addr_valid+0x102/0x340 [ 31.204864] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.205480] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.206083] kasan_report+0xbe/0xf0 [ 31.206551] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.207173] vma_interval_tree_remove+0xc75/0xec0 [ 31.207768] vma_prepare+0xc54/0x11a0 [ 31.208243] __split_vma+0x5af/0x950 [ 31.208710] ? __pfx___split_vma+0x10/0x10 [ 31.209230] ? find_held_lock+0x2c/0x110 [ 31.209745] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.210295] ? lock_is_held_type+0x9f/0x120 [ 31.210829] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.211456] ? mtree_range_walk+0x632/0x900 [ 31.212007] ? mas_walk+0x5c7/0x7c0 [ 31.212477] do_vmi_munmap+0x1f1/0x2b0 [ 31.212966] mmap_region+0x1f9/0x2660 [ 31.213441] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.213946] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.214655] ? __pfx_lock_acquire+0x10/0x10 [ 31.215183] ? __pfx_mmap_region+0x10/0x10 [ 31.215708] ? security_mmap_addr+0x7d/0xa0 [ 31.216231] ? get_unmapped_area+0x1f5/0x3f0 [ 31.216770] do_mmap+0x854/0xf00 [ 31.217199] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.217691] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.218240] ksys_mmap_pgoff+0x3af/0x500 [ 31.218736] do_syscall_64+0x3f/0x90 [ 31.219216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.219855] RIP: 0033:0x7f45d0ccdd82 [ 31.220303] 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 [ 31.222395] RSP: 002b:00007ffca7215518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.223307] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f45d0ccdd82 [ 31.224145] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f45d0107000 [ 31.224972] RBP: 00007f45d0107000 R08: 0000000000000009 R09: 0000000000001000 [ 31.225805] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558623a23d90 [ 31.226648] R13: 00007ffca7215530 R14: 00007ffca7215560 R15: 00007ffca72158c0 [ 31.227495] [ 31.227782] [ 31.227994] Allocated by task 212: [ 31.228420] kasan_save_stack+0x22/0x50 [ 31.228917] kasan_set_track+0x25/0x30 [ 31.229401] __kasan_slab_alloc+0x59/0x70 [ 31.229917] kmem_cache_alloc+0x16b/0x370 [ 31.230426] vm_area_dup+0x20/0x160 [ 31.230885] __split_vma+0x170/0x950 [ 31.231345] split_vma+0xc6/0x110 [ 31.231776] mprotect_fixup+0x8d2/0xb30 [ 31.232279] do_mprotect_pkey+0x87e/0xd40 [ 31.232793] __x64_sys_mprotect+0x78/0xc0 [ 31.233311] do_syscall_64+0x3f/0x90 [ 31.233784] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.234426] [ 31.234638] Freed by task 212: [ 31.235036] kasan_save_stack+0x22/0x50 [ 31.235530] kasan_set_track+0x25/0x30 [ 31.236013] kasan_save_free_info+0x2b/0x50 [ 31.236534] __kasan_slab_free+0x10a/0x190 [ 31.237057] kmem_cache_free+0x10d/0x4d0 [ 31.237562] rcu_core+0x8c8/0x2860 [ 31.238003] __do_softirq+0x1b7/0x7d4 [ 31.238478] [ 31.238690] Last potentially related work creation: [ 31.239325] kasan_save_stack+0x22/0x50 [ 31.239823] __kasan_record_aux_stack+0x8e/0xa0 [ 31.240383] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.241018] remove_vma+0x139/0x170 [ 31.241459] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.242014] do_vmi_munmap+0x1f1/0x2b0 [ 31.242497] __vm_munmap+0x138/0x3a0 [ 31.242978] __x64_sys_munmap+0x59/0x80 [ 31.243467] do_syscall_64+0x3f/0x90 [ 31.243941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.244573] [ 31.244785] The buggy address belongs to the object at ffff88800d4b72b8 [ 31.244785] which belongs to the cache vm_area_struct of size 168 [ 31.246230] The buggy address is located 88 bytes inside of [ 31.246230] freed 168-byte region [ffff88800d4b72b8, ffff88800d4b7360) [ 31.247616] [ 31.247829] The buggy address belongs to the physical page: [ 31.248493] page:000000007be5f21f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd4b7 [ 31.249550] memcg:ffff888016c7a201 [ 31.249971] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.250601] page_type: 0xffffffff() [ 31.251064] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.251973] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016c7a201 [ 31.252871] page dumped because: kasan: bad access detected [ 31.253517] [ 31.253736] Memory state around the buggy address: [ 31.254310] ffff88800d4b7200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.255153] ffff88800d4b7280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.255997] >ffff88800d4b7300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.256841] ^ [ 31.257298] ffff88800d4b7380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.258142] ffff88800d4b7400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.258993] ================================================================== [ 31.259898] Disabling lock debugging due to kernel taint [ 33.213029] BUG: Bad rss-counter state mm:00000000182cd2ae type:MM_FILEPAGES val:33 [ 33.214276] BUG: Bad rss-counter state mm:00000000182cd2ae type:MM_ANONPAGES val:22 [ 33.795405] BUG: Bad rss-counter state mm:000000008d2dad10 type:MM_FILEPAGES val:33 [ 33.796597] BUG: Bad rss-counter state mm:000000008d2dad10 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40045' (ECDSA) to the list of known hosts. 2023/06/20 21:57:59 fuzzer started 2023/06/20 21:57:59 dialing manager at localhost:36067 2023/06/20 21:57:59 checking machine... 2023/06/20 21:57:59 checking revisions... [ 34.447464] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:58:00 testing simple program... [ 34.502466] cgroup: Unknown subsys name 'net' [ 34.562745] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:57:59 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000006 RCX=0000000000000000 RDX=1ffff11001e7ee23 RSI=ffffffff81f4d4b3 RDI=ffff88800f3f7118 RBP=ffff888016c5fc20 RSP=ffff888016c5fa40 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000006 R11=00000000000b6a61 R12=ffff88800f3f7008 R13=ffff888016c5fc24 R14=00000000000002f1 R15=0000000000001032 RIP=ffffffff81f4d4d0 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 00007f1883902900 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=00007f1883eba0b0 CR3=0000000016c38000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fd1a9ee49c0 CR3=00000000100e4000 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=2039353a37353a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a37353a3132203032 XMM08=00007fdde402f4900000008300000100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000