match_int() used in mount option parsing can allocate memory using
GFP_KERNEL and thus sleep. Avoid parsing mount options with sbi->s_lock
held.
Signed-off-by: Jan Kara <jack@xxxxxxx>
---
fs/ext2/super.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 05eae20d133f..e2b6be03e69b 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -1321,20 +1321,20 @@ static int ext2_remount (struct super_block * sb, int * flags, char * data)
int err;
sync_filesystem(sb);
- spin_lock(&sbi->s_lock);
+ spin_lock(&sbi->s_lock);
new_opts.s_mount_opt = sbi->s_mount_opt;
new_opts.s_resuid = sbi->s_resuid;
new_opts.s_resgid = sbi->s_resgid;
+ spin_unlock(&sbi->s_lock);
/*
* Allow the "check" option to be passed as a remount option.
*/
- if (!parse_options(data, sb, &new_opts)) {
- spin_unlock(&sbi->s_lock);
+ if (!parse_options(data, sb, &new_opts))
return -EINVAL;
- }
+ spin_lock(&sbi->s_lock);
es = sbi->s_es;
if ((sbi->s_mount_opt ^ new_opts.s_mount_opt) & EXT2_MOUNT_DAX) {
ext2_msg(sb, KERN_WARNING, "warning: refusing change of "
--
2.12.3
