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f2fs: add sanity check for proc_mkdir 

Return -ENOMEM when proc_mkdir failed.

Signed-off-by: Yangtao Li <frank.li@vivo.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Yangtao Li 2023-04-26 00:06:11 +08:00 committed by Jaegeuk Kim
parent b62e71be21
commit 888ca6edac
1 changed files with 23 additions and 16 deletions
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39
fs/f2fs/sysfs.c
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@ -1386,12 +1386,19 @@ int __init f2fs_init_sysfs(void)
ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
NULL, "features");
if (ret) {
kobject_put(&f2fs_feat);
kset_unregister(&f2fs_kset);
} else {
f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
if (ret)
goto put_kobject;
f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
if (!f2fs_proc_root) {
ret = -ENOMEM;
goto put_kobject;
}
return 0;
put_kobject:
kobject_put(&f2fs_feat);
kset_unregister(&f2fs_kset);
return ret;
}
@ -1430,23 +1437,24 @@ int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
if (err)
goto put_feature_list_kobj;
if (f2fs_proc_root)
sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
sbi->s_proc = proc_mkdir(sb->s_id, f2fs_proc_root);
if (!sbi->s_proc) {
err = -ENOMEM;
goto put_feature_list_kobj;
}
if (sbi->s_proc) {
proc_create_single_data("segment_info", 0444, sbi->s_proc,
proc_create_single_data("segment_info", 0444, sbi->s_proc,
segment_info_seq_show, sb);
proc_create_single_data("segment_bits", 0444, sbi->s_proc,
proc_create_single_data("segment_bits", 0444, sbi->s_proc,
segment_bits_seq_show, sb);
#ifdef CONFIG_F2FS_IOSTAT
proc_create_single_data("iostat_info", 0444, sbi->s_proc,
proc_create_single_data("iostat_info", 0444, sbi->s_proc,
iostat_info_seq_show, sb);
#endif
proc_create_single_data("victim_bits", 0444, sbi->s_proc,
proc_create_single_data("victim_bits", 0444, sbi->s_proc,
victim_bits_seq_show, sb);
proc_create_single_data("discard_plist_info", 0444, sbi->s_proc,
proc_create_single_data("discard_plist_info", 0444, sbi->s_proc,
discard_plist_seq_show, sb);
}
return 0;
put_feature_list_kobj:
kobject_put(&sbi->s_feature_list_kobj);
@ -1462,8 +1470,7 @@ put_sb_kobj:
void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi)
{
if (sbi->s_proc)
remove_proc_subtree(sbi->sb->s_id, f2fs_proc_root);
remove_proc_subtree(sbi->sb->s_id, f2fs_proc_root);
kobject_put(&sbi->s_stat_kobj);
wait_for_completion(&sbi->s_stat_kobj_unregister);