syzkaller login: [ 31.005779] BUG: Bad rss-counter state mm:00000000eefa9fbe type:MM_FILEPAGES val:33 [ 31.007246] BUG: Bad rss-counter state mm:00000000eefa9fbe type:MM_ANONPAGES val:22 [ 31.158890] ================================================================== [ 31.159835] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.160796] Read of size 8 at addr ffff88801a86a310 by task sshd/221 [ 31.161596] [ 31.161824] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.162722] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.163721] Call Trace: [ 31.164056] [ 31.164340] dump_stack_lvl+0x91/0xf0 [ 31.164846] print_report+0xcc/0x620 [ 31.165343] ? __virt_addr_valid+0x102/0x340 [ 31.165930] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.166570] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.167210] kasan_report+0xbe/0xf0 [ 31.167689] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.168332] vma_interval_tree_remove+0xc75/0xec0 [ 31.168982] vma_prepare+0xc54/0x11a0 [ 31.169490] __split_vma+0x5af/0x950 [ 31.170017] ? __pfx___split_vma+0x10/0x10 [ 31.170576] ? find_held_lock+0x2c/0x110 [ 31.171137] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.171735] ? lock_is_held_type+0x9f/0x120 [ 31.172303] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.172943] ? mtree_range_walk+0x632/0x900 [ 31.173536] ? mas_walk+0x5c7/0x7c0 [ 31.174065] do_vmi_munmap+0x1f1/0x2b0 [ 31.174595] mmap_region+0x1f9/0x2660 [ 31.175113] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.175658] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.176423] ? __pfx_lock_acquire+0x10/0x10 [ 31.177008] ? __pfx_mmap_region+0x10/0x10 [ 31.177593] ? security_mmap_addr+0x7d/0xa0 [ 31.178167] ? get_unmapped_area+0x1f5/0x3f0 [ 31.178759] do_mmap+0x854/0xf00 [ 31.179220] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.179745] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.180332] ksys_mmap_pgoff+0x3af/0x500 [ 31.180888] do_syscall_64+0x3f/0x90 [ 31.181397] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.182107] RIP: 0033:0x7fc072a1dd82 [ 31.182589] 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 [ 31.184878] RSP: 002b:00007ffd9776b848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.185867] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc072a1dd82 [ 31.186761] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc071e57000 [ 31.187670] RBP: 00007fc071e57000 R08: 0000000000000009 R09: 0000000000001000 [ 31.188582] R10: 0000000000000812 R11: 0000000000000206 R12: 000056546a9ba980 [ 31.189499] R13: 00007ffd9776b860 R14: 00007ffd9776b890 R15: 00007ffd9776bbf0 [ 31.190428] [ 31.190733] [ 31.190961] Allocated by task 214: [ 31.191425] kasan_save_stack+0x22/0x50 [ 31.191955] kasan_set_track+0x25/0x30 [ 31.192492] __kasan_slab_alloc+0x59/0x70 [ 31.193046] kmem_cache_alloc+0x16b/0x370 [ 31.193621] vm_area_dup+0x20/0x160 [ 31.194117] __split_vma+0x170/0x950 [ 31.194618] split_vma+0xc6/0x110 [ 31.195081] mprotect_fixup+0x8d2/0xb30 [ 31.195618] do_mprotect_pkey+0x87e/0xd40 [ 31.196172] __x64_sys_mprotect+0x78/0xc0 [ 31.196738] do_syscall_64+0x3f/0x90 [ 31.197233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.197938] [ 31.198179] Freed by task 214: [ 31.198600] kasan_save_stack+0x22/0x50 [ 31.199139] kasan_set_track+0x25/0x30 [ 31.199670] kasan_save_free_info+0x2b/0x50 [ 31.200254] __kasan_slab_free+0x10a/0x190 [ 31.200823] kmem_cache_free+0x10d/0x4d0 [ 31.201378] rcu_core+0x8c8/0x2860 [ 31.201870] __do_softirq+0x1b7/0x7d4 [ 31.202377] [ 31.202603] Last potentially related work creation: [ 31.203233] kasan_save_stack+0x22/0x50 [ 31.203769] __kasan_record_aux_stack+0x8e/0xa0 [ 31.204384] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.205066] remove_vma+0x139/0x170 [ 31.205550] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.206155] do_vmi_munmap+0x1f1/0x2b0 [ 31.206677] __vm_munmap+0x138/0x3a0 [ 31.207175] __x64_sys_munmap+0x59/0x80 [ 31.207764] do_syscall_64+0x3f/0x90 [ 31.208265] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.208954] [ 31.209181] The buggy address belongs to the object at ffff88801a86a2b8 [ 31.209181] which belongs to the cache vm_area_struct of size 168 [ 31.210761] The buggy address is located 88 bytes inside of [ 31.210761] freed 168-byte region [ffff88801a86a2b8, ffff88801a86a360) [ 31.212262] [ 31.212494] The buggy address belongs to the physical page: [ 31.213208] page:00000000fe90b480 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a86a [ 31.214388] memcg:ffff888018796601 [ 31.214839] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.215582] page_type: 0xffffffff() [ 31.216054] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.217028] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018796601 [ 31.218012] page dumped because: kasan: bad access detected [ 31.218721] [ 31.218966] Memory state around the buggy address: [ 31.219589] ffff88801a86a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.220499] ffff88801a86a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.221402] >ffff88801a86a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.222306] ^ [ 31.222800] ffff88801a86a380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.223720] ffff88801a86a400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.224624] ================================================================== [ 31.225979] Disabling lock debugging due to kernel taint [ 33.131652] BUG: Bad rss-counter state mm:0000000055931d47 type:MM_FILEPAGES val:33 [ 33.132783] BUG: Bad rss-counter state mm:0000000055931d47 type:MM_ANONPAGES val:22 [ 33.658350] BUG: Bad rss-counter state mm:000000003396b519 type:MM_FILEPAGES val:33 [ 33.659414] BUG: Bad rss-counter state mm:000000003396b519 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9445' (ECDSA) to the list of known hosts. 2023/06/20 19:37:53 fuzzer started 2023/06/20 19:37:53 dialing manager at localhost:36067 2023/06/20 19:37:53 checking machine... 2023/06/20 19:37:53 checking revisions... [ 34.424151] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:37:53 testing simple program... [ 34.486908] cgroup: Unknown subsys name 'net' [ 34.538155] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:37:53 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fddbd7f54f0 CR3=000000000f70c000 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=dfc2fb0cf277408188455c66b04d64bb XMM02=000000000011a428ec2efd57dc4c00df XMM03=000000000012196849ba7fa1ab7352de XMM04=50ffb929cc46814300000000000ae988 XMM05=e4cb8bb95a7664b600000000001317d0 XMM06=ef834786b49f34e30000000000130638 XMM07=e042d86d42eb936e0000000000121be8 XMM08=49ba7fa1ab7352de000000000011a488 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880169c92c9 RCX=1ffff11001c90317 RDX=1ffff11001be2c33 RSI=ffffffff87b89f80 RDI=ffff8880169c92d0 RBP=ffff88800df16198 RSP=ffff88806cf09db8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6a61 R12=ffff8880169c92c8 R13=ffff88800e4818b9 R14=ffff8880169c2c48 R15=ffffffff87b89f80 RIP=ffffffff844d2d05 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5a2bdab900 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=00007ffdf3c0c000 CR3=000000000e600000 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