syzkaller login: [ 31.934347] sshd (214) used greatest stack depth: 24128 bytes left [ 31.936687] BUG: Bad rss-counter state mm:0000000062c512df type:MM_FILEPAGES val:33 [ 31.938130] BUG: Bad rss-counter state mm:0000000062c512df type:MM_ANONPAGES val:22 [ 32.147301] ================================================================== [ 32.148286] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.149287] Read of size 8 at addr ffff88800d7e93f8 by task sshd/223 [ 32.150069] [ 32.150302] CPU: 1 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.151405] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.152784] Call Trace: [ 32.153221] [ 32.153598] dump_stack_lvl+0x91/0xf0 [ 32.154228] print_report+0xcc/0x620 [ 32.154857] ? __virt_addr_valid+0x102/0x340 [ 32.155567] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.156340] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.157126] kasan_report+0xbe/0xf0 [ 32.157654] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.158295] vma_interval_tree_remove+0xc75/0xec0 [ 32.158897] vma_prepare+0xc54/0x11a0 [ 32.159382] __split_vma+0x5af/0x950 [ 32.159856] ? __pfx___split_vma+0x10/0x10 [ 32.160424] ? find_held_lock+0x2c/0x110 [ 32.160943] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.161609] ? lock_is_held_type+0x9f/0x120 [ 32.162293] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.163051] ? mtree_range_walk+0x632/0x900 [ 32.163753] ? mas_walk+0x5c7/0x7c0 [ 32.164359] do_vmi_munmap+0x1f1/0x2b0 [ 32.165026] mmap_region+0x1f9/0x2660 [ 32.165594] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.166121] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.166842] ? __pfx_lock_acquire+0x10/0x10 [ 32.167391] ? __pfx_mmap_region+0x10/0x10 [ 32.167949] ? security_mmap_addr+0x7d/0xa0 [ 32.168588] ? get_unmapped_area+0x1f5/0x3f0 [ 32.169152] do_mmap+0x854/0xf00 [ 32.169595] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.170097] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.170682] ksys_mmap_pgoff+0x3af/0x500 [ 32.171204] do_syscall_64+0x3f/0x90 [ 32.171687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.172367] RIP: 0033:0x7fcc7da80d82 [ 32.172847] 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 [ 32.175048] RSP: 002b:00007ffee28dd308 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.175965] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcc7da80d82 [ 32.176845] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcc7ceba000 [ 32.177705] RBP: 00007fcc7ceba000 R08: 0000000000000009 R09: 0000000000001000 [ 32.178573] R10: 0000000000000812 R11: 0000000000000206 R12: 00005580a4331b20 [ 32.179456] R13: 00007ffee28dd320 R14: 00007ffee28dd350 R15: 00007ffee28dd6b0 [ 32.180335] [ 32.180639] [ 32.180855] Allocated by task 214: [ 32.181310] kasan_save_stack+0x22/0x50 [ 32.181815] kasan_set_track+0x25/0x30 [ 32.182321] __kasan_slab_alloc+0x59/0x70 [ 32.182844] kmem_cache_alloc+0x16b/0x370 [ 32.183371] vm_area_dup+0x20/0x160 [ 32.183822] __split_vma+0x170/0x950 [ 32.184315] split_vma+0xc6/0x110 [ 32.184777] mprotect_fixup+0x8d2/0xb30 [ 32.185292] do_mprotect_pkey+0x87e/0xd40 [ 32.185824] __x64_sys_mprotect+0x78/0xc0 [ 32.186357] do_syscall_64+0x3f/0x90 [ 32.186826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.187482] [ 32.187698] Freed by task 214: [ 32.188093] kasan_save_stack+0x22/0x50 [ 32.188629] kasan_set_track+0x25/0x30 [ 32.189148] kasan_save_free_info+0x2b/0x50 [ 32.189684] __kasan_slab_free+0x10a/0x190 [ 32.190241] kmem_cache_free+0x10d/0x4d0 [ 32.190753] rcu_core+0x8c8/0x2860 [ 32.191210] __do_softirq+0x1b7/0x7d4 [ 32.191690] [ 32.191904] Last potentially related work creation: [ 32.192587] kasan_save_stack+0x22/0x50 [ 32.193127] __kasan_record_aux_stack+0x8e/0xa0 [ 32.193770] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.194451] remove_vma+0x139/0x170 [ 32.194924] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.195505] do_vmi_munmap+0x1f1/0x2b0 [ 32.196004] __vm_munmap+0x138/0x3a0 [ 32.196512] __x64_sys_munmap+0x59/0x80 [ 32.197025] do_syscall_64+0x3f/0x90 [ 32.197536] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.198222] [ 32.198443] Second to last potentially related work creation: [ 32.199162] kasan_save_stack+0x22/0x50 [ 32.199683] __kasan_record_aux_stack+0x8e/0xa0 [ 32.200283] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.200969] remove_vma+0x139/0x170 [ 32.201469] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.202056] do_vmi_munmap+0x1f1/0x2b0 [ 32.202568] mmap_region+0x1f9/0x2660 [ 32.203057] do_mmap+0x854/0xf00 [ 32.203514] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.204025] ksys_mmap_pgoff+0x3af/0x500 [ 32.204587] do_syscall_64+0x3f/0x90 [ 32.205081] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.205775] [ 32.205997] The buggy address belongs to the object at ffff88800d7e93a0 [ 32.205997] which belongs to the cache vm_area_struct of size 168 [ 32.207552] The buggy address is located 88 bytes inside of [ 32.207552] freed 168-byte region [ffff88800d7e93a0, ffff88800d7e9448) [ 32.209044] [ 32.209297] The buggy address belongs to the physical page: [ 32.209980] page:000000006e3926d7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd7e9 [ 32.211132] memcg:ffff88800e1b6801 [ 32.211581] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.212316] page_type: 0xffffffff() [ 32.212781] raw: 0100000000000200 ffff88800879fc80 ffffea000035fd40 dead000000000007 [ 32.213732] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1b6801 [ 32.214657] page dumped because: kasan: bad access detected [ 32.215332] [ 32.215545] Memory state around the buggy address: [ 32.216139] ffff88800d7e9280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 32.217016] ffff88800d7e9300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.217896] >ffff88800d7e9380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.218765] ^ [ 32.219624] ffff88800d7e9400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.220508] ffff88800d7e9480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.221388] ================================================================== [ 32.222425] Disabling lock debugging due to kernel taint [ 34.885187] BUG: Bad rss-counter state mm:00000000986812f3 type:MM_FILEPAGES val:33 [ 34.886370] BUG: Bad rss-counter state mm:00000000986812f3 type:MM_ANONPAGES val:22 [ 35.277229] BUG: Bad rss-counter state mm:00000000f5f9c653 type:MM_FILEPAGES val:33 [ 35.278234] BUG: Bad rss-counter state mm:00000000f5f9c653 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17658' (ECDSA) to the list of known hosts. 2023/06/19 15:57:44 fuzzer started 2023/06/19 15:57:45 dialing manager at localhost:44161 2023/06/19 15:57:45 checking machine... 2023/06/19 15:57:45 checking revisions... [ 36.002925] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:57:45 testing simple program... [ 36.054141] cgroup: Unknown subsys name 'net' [ 36.119774] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:57:41 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007fff82d80b78 CR3=000000000e0ae000 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=2034343a37353a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a37353a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff85fa2ee8 RBX=ffffffff85fa2ed8 RCX=ffffffff83634882 RDX=0000000000000000 RSI=ffffffff863b0c40 RDI=ffffffff85fa2ecc RBP=ffffffff85fa2edc RSP=ffff88801632f7c0 R8 =ffffffff863b0c40 R9 =ffff88801632f8b8 R10=0000000000038001 R11=000000000008a6be R12=ffffffff85fa2ee8 R13=ffffffff85fa2ecc R14=ffffffff85fa2ed8 R15=dffffc0000000000 RIP=ffffffff8112fc5a RFL=00000216 [----AP-] 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 00007fe8a63d3900 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=00007ffed0703000 CR3=0000000016bc0000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000