syzkaller login: [ 31.029204] BUG: Bad rss-counter state mm:00000000489db10f type:MM_FILEPAGES val:33 [ 31.030208] BUG: Bad rss-counter state mm:00000000489db10f type:MM_ANONPAGES val:22 [ 31.178107] ================================================================== [ 31.179000] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.179953] Read of size 8 at addr ffff88800d4ded08 by task sshd/220 [ 31.180718] [ 31.181031] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.181887] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.182857] Call Trace: [ 31.183193] [ 31.183478] dump_stack_lvl+0x91/0xf0 [ 31.183992] print_report+0xcc/0x620 [ 31.184477] ? __virt_addr_valid+0x102/0x340 [ 31.185027] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.185641] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.186248] kasan_report+0xbe/0xf0 [ 31.186720] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.187340] vma_interval_tree_remove+0xc75/0xec0 [ 31.187968] vma_prepare+0xc54/0x11a0 [ 31.188468] __split_vma+0x5af/0x950 [ 31.188961] ? __pfx___split_vma+0x10/0x10 [ 31.189509] ? find_held_lock+0x2c/0x110 [ 31.190048] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.190633] ? lock_is_held_type+0x9f/0x120 [ 31.191192] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.191819] ? mtree_range_walk+0x632/0x900 [ 31.192431] ? mas_walk+0x5c7/0x7c0 [ 31.192926] do_vmi_munmap+0x1f1/0x2b0 [ 31.193435] mmap_region+0x1f9/0x2660 [ 31.193936] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.194463] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.195199] ? __pfx_lock_acquire+0x10/0x10 [ 31.195747] ? __pfx_mmap_region+0x10/0x10 [ 31.196313] ? security_mmap_addr+0x7d/0xa0 [ 31.196864] ? get_unmapped_area+0x1f5/0x3f0 [ 31.197436] do_mmap+0x854/0xf00 [ 31.197888] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.198398] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.199017] ksys_mmap_pgoff+0x3af/0x500 [ 31.199545] do_syscall_64+0x3f/0x90 [ 31.200054] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.200727] RIP: 0033:0x7f9518701d82 [ 31.201199] 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 [ 31.203402] RSP: 002b:00007ffcd5aadb88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.204346] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9518701d82 [ 31.205219] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9517b3b000 [ 31.206140] RBP: 00007f9517b3b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.207148] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564b26dc0b20 [ 31.208423] R13: 00007ffcd5aadba0 R14: 00007ffcd5aadbd0 R15: 00007ffcd5aadf30 [ 31.209663] [ 31.210046] [ 31.210343] Allocated by task 213: [ 31.210912] kasan_save_stack+0x22/0x50 [ 31.211607] kasan_set_track+0x25/0x30 [ 31.212325] __kasan_slab_alloc+0x59/0x70 [ 31.213067] kmem_cache_alloc+0x16b/0x370 [ 31.213757] vm_area_dup+0x20/0x160 [ 31.214381] __split_vma+0x170/0x950 [ 31.214987] split_vma+0xc6/0x110 [ 31.215557] mprotect_fixup+0x8d2/0xb30 [ 31.216248] do_mprotect_pkey+0x87e/0xd40 [ 31.216945] __x64_sys_mprotect+0x78/0xc0 [ 31.217652] do_syscall_64+0x3f/0x90 [ 31.218326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.219250] [ 31.219563] Freed by task 213: [ 31.220149] kasan_save_stack+0x22/0x50 [ 31.220863] kasan_set_track+0x25/0x30 [ 31.221502] kasan_save_free_info+0x2b/0x50 [ 31.222201] __kasan_slab_free+0x10a/0x190 [ 31.222895] kmem_cache_free+0x10d/0x4d0 [ 31.223561] rcu_core+0x8c8/0x2860 [ 31.224172] __do_softirq+0x1b7/0x7d4 [ 31.224785] [ 31.225068] Last potentially related work creation: [ 31.225841] kasan_save_stack+0x22/0x50 [ 31.226493] __kasan_record_aux_stack+0x8e/0xa0 [ 31.227247] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.228105] remove_vma+0x139/0x170 [ 31.228698] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.229471] do_vmi_munmap+0x1f1/0x2b0 [ 31.230150] __vm_munmap+0x138/0x3a0 [ 31.230723] __x64_sys_munmap+0x59/0x80 [ 31.231384] do_syscall_64+0x3f/0x90 [ 31.232080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.232974] [ 31.233269] Second to last potentially related work creation: [ 31.234250] kasan_save_stack+0x22/0x50 [ 31.234918] __kasan_record_aux_stack+0x8e/0xa0 [ 31.235741] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.236469] remove_vma+0x139/0x170 [ 31.236945] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.237522] do_vmi_munmap+0x1f1/0x2b0 [ 31.238025] mmap_region+0x1f9/0x2660 [ 31.238514] do_mmap+0x854/0xf00 [ 31.238953] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.239455] ksys_mmap_pgoff+0x3af/0x500 [ 31.239993] do_syscall_64+0x3f/0x90 [ 31.240487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.241152] [ 31.241374] The buggy address belongs to the object at ffff88800d4decb0 [ 31.241374] which belongs to the cache vm_area_struct of size 168 [ 31.242914] The buggy address is located 88 bytes inside of [ 31.242914] freed 168-byte region [ffff88800d4decb0, ffff88800d4ded58) [ 31.244386] [ 31.244607] The buggy address belongs to the physical page: [ 31.245289] page:000000004421a8f3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd4de [ 31.246403] memcg:ffff888009ab6801 [ 31.246844] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.247565] page_type: 0xffffffff() [ 31.248060] raw: 0100000000000200 ffff8880087a0c80 ffffea000033fac0 dead000000000007 [ 31.248998] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009ab6801 [ 31.249929] page dumped because: kasan: bad access detected [ 31.250617] [ 31.250844] Memory state around the buggy address: [ 31.251434] ffff88800d4dec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.252334] ffff88800d4dec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.253198] >ffff88800d4ded00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.254078] ^ [ 31.254534] ffff88800d4ded80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.255418] ffff88800d4dee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.256322] ================================================================== [ 31.257396] Disabling lock debugging due to kernel taint [ 33.082711] BUG: Bad rss-counter state mm:00000000768e7f04 type:MM_FILEPAGES val:33 [ 33.083521] BUG: Bad rss-counter state mm:00000000768e7f04 type:MM_ANONPAGES val:22 [ 33.591665] BUG: Bad rss-counter state mm:000000006c8e73f1 type:MM_FILEPAGES val:33 [ 33.592896] BUG: Bad rss-counter state mm:000000006c8e73f1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37258' (ECDSA) to the list of known hosts. 2023/06/21 04:42:53 fuzzer started 2023/06/21 04:42:54 dialing manager at localhost:36067 2023/06/21 04:42:54 checking machine... 2023/06/21 04:42:54 checking revisions... [ 34.235325] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:42:54 testing simple program... [ 34.289610] cgroup: Unknown subsys name 'net' [ 34.340503] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:42:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800e93b680 RSI=0000000000000000 RDI=00007f90a6ef2044 RBP=ffff88800fa37f58 RSP=ffff88800fa37f20 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000007 R13=0000000000000000 R14=00007f90a6ef2044 R15=0000000000000000 RIP=ffffffff8113cf84 RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f90a639e900 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=00007f90a6ef2044 CR3=0000000017ae4000 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=00000000000000000000000000000000 XMM02=000000000000000000000000000000ff XMM03=5c41bab1688ae42fe0487532ad449df8 XMM04=18c32a5ac4260a938dbbe433cfbf1c91 XMM05=000000000000000000000000000000ff XMM06=18412a5a68260a2f8d487532ad441c91 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 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=0000000000000001 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=00007ff2311831b0 CR3=000000000f268000 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=d44074f424878f993b4f36803a94e1dc XMM02=2c67c8bc2e329bc3000000000011c790 XMM03=fb795ef6d65770560000000000123498 XMM04=995b16b1dfd8c1b300000000000ae988 XMM05=19e9129bd510f2350000000000134648 XMM06=88dc6349ea5bd5bb00000000001334b0 XMM07=e042d86d42eb936e0000000000123718 XMM08=536fbf4a1f0dff5c000000000011c7f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000