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-rw-r--r--fs/ceph/super.c3
-rw-r--r--fs/cifs/cifsfs.c6
-rw-r--r--fs/ext4/super.c4
-rw-r--r--fs/gfs2/super.c6
-rw-r--r--fs/hfs/super.c4
-rw-r--r--fs/hfsplus/options.c4
-rw-r--r--fs/hostfs/hostfs_kern.c2
-rw-r--r--fs/ocfs2/super.c4
-rw-r--r--fs/reiserfs/super.c8
-rw-r--r--fs/xfs/xfs_super.c4
-rw-r--r--include/linux/seq_file.h35
-rw-r--r--kernel/cgroup.c5
-rw-r--r--security/selinux/hooks.c2
13 files changed, 63 insertions, 24 deletions
diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index 8503ec130c15..526db4502aa6 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -483,7 +483,8 @@ static int ceph_show_options(struct seq_file *m, struct dentry *root)
if (fsopt->max_readdir_bytes != CEPH_MAX_READDIR_BYTES_DEFAULT)
seq_printf(m, ",readdir_max_bytes=%d", fsopt->max_readdir_bytes);
if (strcmp(fsopt->snapdir_name, CEPH_SNAPDIRNAME_DEFAULT))
- seq_printf(m, ",snapdirname=%s", fsopt->snapdir_name);
+ seq_show_option(m, "snapdirname", fsopt->snapdir_name);
+
return 0;
}
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 888398067420..d678cda1cd81 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -382,17 +382,17 @@ cifs_show_options(struct seq_file *s, struct dentry *root)
struct sockaddr *srcaddr;
srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr;
- seq_printf(s, ",vers=%s", tcon->ses->server->vals->version_string);
+ seq_show_option(s, "vers", tcon->ses->server->vals->version_string);
cifs_show_security(s, tcon->ses);
cifs_show_cache_flavor(s, cifs_sb);
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER)
seq_puts(s, ",multiuser");
else if (tcon->ses->user_name)
- seq_printf(s, ",username=%s", tcon->ses->user_name);
+ seq_show_option(s, "username", tcon->ses->user_name);
if (tcon->ses->domainName)
- seq_printf(s, ",domain=%s", tcon->ses->domainName);
+ seq_show_option(s, "domain", tcon->ses->domainName);
if (srcaddr->sa_family != AF_UNSPEC) {
struct sockaddr_in *saddr4;
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index cf977e2f8a6f..a8f6f6a358ce 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -1750,10 +1750,10 @@ static inline void ext4_show_quota_options(struct seq_file *seq,
}
if (sbi->s_qf_names[USRQUOTA])
- seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]);
+ seq_show_option(seq, "usrjquota", sbi->s_qf_names[USRQUOTA]);
if (sbi->s_qf_names[GRPQUOTA])
- seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]);
+ seq_show_option(seq, "grpjquota", sbi->s_qf_names[GRPQUOTA]);
#endif
}
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index 1319b5c4ec68..b844cf82e0f9 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -1302,11 +1302,11 @@ static int gfs2_show_options(struct seq_file *s, struct dentry *root)
if (is_ancestor(root, sdp->sd_master_dir))
seq_printf(s, ",meta");
if (args->ar_lockproto[0])
- seq_printf(s, ",lockproto=%s", args->ar_lockproto);
+ seq_show_option(s, "lockproto", args->ar_lockproto);
if (args->ar_locktable[0])
- seq_printf(s, ",locktable=%s", args->ar_locktable);
+ seq_show_option(s, "locktable", args->ar_locktable);
if (args->ar_hostdata[0])
- seq_printf(s, ",hostdata=%s", args->ar_hostdata);
+ seq_show_option(s, "hostdata", args->ar_hostdata);
if (args->ar_spectator)
seq_printf(s, ",spectator");
if (args->ar_localflocks)
diff --git a/fs/hfs/super.c b/fs/hfs/super.c
index eee7206c38d1..410b65eea683 100644
--- a/fs/hfs/super.c
+++ b/fs/hfs/super.c
@@ -135,9 +135,9 @@ static int hfs_show_options(struct seq_file *seq, struct dentry *root)
struct hfs_sb_info *sbi = HFS_SB(root->d_sb);
if (sbi->s_creator != cpu_to_be32(0x3f3f3f3f))
- seq_printf(seq, ",creator=%.4s", (char *)&sbi->s_creator);
+ seq_show_option_n(seq, "creator", (char *)&sbi->s_creator, 4);
if (sbi->s_type != cpu_to_be32(0x3f3f3f3f))
- seq_printf(seq, ",type=%.4s", (char *)&sbi->s_type);
+ seq_show_option_n(seq, "type", (char *)&sbi->s_type, 4);
seq_printf(seq, ",uid=%u,gid=%u",
from_kuid_munged(&init_user_ns, sbi->s_uid),
from_kgid_munged(&init_user_ns, sbi->s_gid));
diff --git a/fs/hfsplus/options.c b/fs/hfsplus/options.c
index c90b72ee676d..bb806e58c977 100644
--- a/fs/hfsplus/options.c
+++ b/fs/hfsplus/options.c
@@ -218,9 +218,9 @@ int hfsplus_show_options(struct seq_file *seq, struct dentry *root)
struct hfsplus_sb_info *sbi = HFSPLUS_SB(root->d_sb);
if (sbi->creator != HFSPLUS_DEF_CR_TYPE)
- seq_printf(seq, ",creator=%.4s", (char *)&sbi->creator);
+ seq_show_option_n(seq, "creator", (char *)&sbi->creator, 4);
if (sbi->type != HFSPLUS_DEF_CR_TYPE)
- seq_printf(seq, ",type=%.4s", (char *)&sbi->type);
+ seq_show_option_n(seq, "type", (char *)&sbi->type, 4);
seq_printf(seq, ",umask=%o,uid=%u,gid=%u", sbi->umask,
from_kuid_munged(&init_user_ns, sbi->uid),
from_kgid_munged(&init_user_ns, sbi->gid));
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index bb529f3b7f2b..456f60e2552e 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -255,7 +255,7 @@ static int hostfs_show_options(struct seq_file *seq, struct dentry *root)
size_t offset = strlen(root_ino) + 1;
if (strlen(root_path) > offset)
- seq_printf(seq, ",%s", root_path + offset);
+ seq_show_option(seq, root_path + offset, NULL);
return 0;
}
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index ddb662b32447..34690360ff33 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -1564,8 +1564,8 @@ static int ocfs2_show_options(struct seq_file *s, struct dentry *root)
seq_printf(s, ",localflocks,");
if (osb->osb_cluster_stack[0])
- seq_printf(s, ",cluster_stack=%.*s", OCFS2_STACK_LABEL_LEN,
- osb->osb_cluster_stack);
+ seq_show_option_n(s, "cluster_stack", osb->osb_cluster_stack,
+ OCFS2_STACK_LABEL_LEN);
if (opts & OCFS2_MOUNT_USRQUOTA)
seq_printf(s, ",usrquota");
if (opts & OCFS2_MOUNT_GRPQUOTA)
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index 27575041bea3..48c6924eba05 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -710,18 +710,20 @@ static int reiserfs_show_options(struct seq_file *seq, struct dentry *root)
seq_puts(seq, ",acl");
if (REISERFS_SB(s)->s_jdev)
- seq_printf(seq, ",jdev=%s", REISERFS_SB(s)->s_jdev);
+ seq_show_option(seq, "jdev", REISERFS_SB(s)->s_jdev);
if (journal->j_max_commit_age != journal->j_default_max_commit_age)
seq_printf(seq, ",commit=%d", journal->j_max_commit_age);
#ifdef CONFIG_QUOTA
if (REISERFS_SB(s)->s_qf_names[USRQUOTA])
- seq_printf(seq, ",usrjquota=%s", REISERFS_SB(s)->s_qf_names[USRQUOTA]);
+ seq_show_option(seq, "usrjquota",
+ REISERFS_SB(s)->s_qf_names[USRQUOTA]);
else if (opts & (1 << REISERFS_USRQUOTA))
seq_puts(seq, ",usrquota");
if (REISERFS_SB(s)->s_qf_names[GRPQUOTA])
- seq_printf(seq, ",grpjquota=%s", REISERFS_SB(s)->s_qf_names[GRPQUOTA]);
+ seq_show_option(seq, "grpjquota",
+ REISERFS_SB(s)->s_qf_names[GRPQUOTA]);
else if (opts & (1 << REISERFS_GRPQUOTA))
seq_puts(seq, ",grpquota");
if (REISERFS_SB(s)->s_jquota_fmt) {
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index 8f0333b3f7a0..2637010a6224 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -529,9 +529,9 @@ xfs_showargs(
seq_printf(m, "," MNTOPT_LOGBSIZE "=%dk", mp->m_logbsize >> 10);
if (mp->m_logname)
- seq_printf(m, "," MNTOPT_LOGDEV "=%s", mp->m_logname);
+ seq_show_option(m, MNTOPT_LOGDEV, mp->m_logname);
if (mp->m_rtname)
- seq_printf(m, "," MNTOPT_RTDEV "=%s", mp->m_rtname);
+ seq_show_option(m, MNTOPT_RTDEV, mp->m_rtname);
if (mp->m_dalign > 0)
seq_printf(m, "," MNTOPT_SUNIT "=%d",
diff --git a/include/linux/seq_file.h b/include/linux/seq_file.h
index 52e0097f61f0..6288341db62d 100644
--- a/include/linux/seq_file.h
+++ b/include/linux/seq_file.h
@@ -158,6 +158,41 @@ static inline struct user_namespace *seq_user_ns(struct seq_file *seq)
#endif
}
+/**
+ * seq_show_options - display mount options with appropriate escapes.
+ * @m: the seq_file handle
+ * @name: the mount option name
+ * @value: the mount option name's value, can be NULL
+ */
+static inline void seq_show_option(struct seq_file *m, const char *name,
+ const char *value)
+{
+ seq_putc(m, ',');
+ seq_escape(m, name, ",= \t\n\\");
+ if (value) {
+ seq_putc(m, '=');
+ seq_escape(m, value, ", \t\n\\");
+ }
+}
+
+/**
+ * seq_show_option_n - display mount options with appropriate escapes
+ * where @value must be a specific length.
+ * @m: the seq_file handle
+ * @name: the mount option name
+ * @value: the mount option name's value, cannot be NULL
+ * @length: the length of @value to display
+ *
+ * This is a macro since this uses "length" to define the size of the
+ * stack buffer.
+ */
+#define seq_show_option_n(m, name, value, length) { \
+ char val_buf[length + 1]; \
+ strncpy(val_buf, value, length); \
+ val_buf[length] = '\0'; \
+ seq_show_option(m, name, val_buf); \
+}
+
#define SEQ_START_TOKEN ((void *)1)
/*
* Helpers for iteration over list_head-s in seq_files
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 44fadfb287bf..58fd665d1217 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -1248,13 +1248,14 @@ static int cgroup_show_options(struct seq_file *seq,
spin_lock(&release_agent_path_lock);
if (strlen(root->release_agent_path))
- seq_printf(seq, ",release_agent=%s", root->release_agent_path);
+ seq_show_option(seq, "release_agent",
+ root->release_agent_path);
spin_unlock(&release_agent_path_lock);
if (test_bit(CGRP_CPUSET_CLONE_CHILDREN, &root->cgrp.flags))
seq_puts(seq, ",clone_children");
if (strlen(root->name))
- seq_printf(seq, ",name=%s", root->name);
+ seq_show_option(seq, "name", root->name);
return 0;
}
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 9a23a7cccdc4..af2d5124f99c 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -1100,7 +1100,7 @@ static void selinux_write_opts(struct seq_file *m,
seq_puts(m, prefix);
if (has_comma)
seq_putc(m, '\"');
- seq_puts(m, opts->mnt_opts[i]);
+ seq_escape(m, opts->mnt_opts[i], "\"\n\\");
if (has_comma)
seq_putc(m, '\"');
}
generated by cgit v1.2.3 (git 2.46.0) at 2026-03-04 00:08:38 +0000