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| author | Roberto Sassu <roberto.sassu@huawei.com> | 2023-06-07 18:15:23 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-06-19 16:19:04 -0700 |
| commit | 36ce9d76b0a93bae799e27e4f5ac35478c676592 (patch) | |
| tree | 0592be8afc0757a7d1c30988b63040cf1ee75b9d | |
| parent | 91ff4d754a1895feb4216e94028edd76cbbc0770 (diff) | |
| download | linux-36ce9d76b0a93bae799e27e4f5ac35478c676592.tar.gz linux-36ce9d76b0a93bae799e27e4f5ac35478c676592.tar.bz2 linux-36ce9d76b0a93bae799e27e4f5ac35478c676592.zip | |
shmem: use ramfs_kill_sb() for kill_sb method of ramfs-based tmpfs
As the ramfs-based tmpfs uses ramfs_init_fs_context() for the
init_fs_context method, which allocates fc->s_fs_info, use ramfs_kill_sb()
to free it and avoid a memory leak.
Link: https://lkml.kernel.org/r/20230607161523.2876433-1-roberto.sassu@huaweicloud.com
Fixes: c3b1b1cbf002 ("ramfs: add support for "mode=" mount option")
Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | fs/ramfs/inode.c | 2 | ||||
| -rw-r--r-- | include/linux/ramfs.h | 1 | ||||
| -rw-r--r-- | mm/shmem.c | 2 |
3 files changed, 3 insertions, 2 deletions
diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c index 5ba580c78835..fef477c78107 100644 --- a/fs/ramfs/inode.c +++ b/fs/ramfs/inode.c @@ -278,7 +278,7 @@ int ramfs_init_fs_context(struct fs_context *fc) return 0; } -static void ramfs_kill_sb(struct super_block *sb) +void ramfs_kill_sb(struct super_block *sb) { kfree(sb->s_fs_info); kill_litter_super(sb); diff --git a/include/linux/ramfs.h b/include/linux/ramfs.h index 917528d102c4..d506dc63dd47 100644 --- a/include/linux/ramfs.h +++ b/include/linux/ramfs.h @@ -7,6 +7,7 @@ struct inode *ramfs_get_inode(struct super_block *sb, const struct inode *dir, umode_t mode, dev_t dev); extern int ramfs_init_fs_context(struct fs_context *fc); +extern void ramfs_kill_sb(struct super_block *sb); #ifdef CONFIG_MMU static inline int diff --git a/mm/shmem.c b/mm/shmem.c index 5e54ab5f61f2..c606ab89693a 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -4199,7 +4199,7 @@ static struct file_system_type shmem_fs_type = { .name = "tmpfs", .init_fs_context = ramfs_init_fs_context, .parameters = ramfs_fs_parameters, - .kill_sb = kill_litter_super, + .kill_sb = ramfs_kill_sb, .fs_flags = FS_USERNS_MOUNT, }; |