From beb22d9386c3eab7938f6920e01768e98a3924e9 Mon Sep 17 00:00:00 2001 From: Navid Emamdoost Date: Wed, 2 Oct 2019 16:52:37 -0500 Subject: affs: fix a memory leak in affs_remount [ Upstream commit 450c3d4166837c496ebce03650c08800991f2150 ] In affs_remount if data is provided it is duplicated into new_opts. The allocated memory for new_opts is only released if parse_options fails. There's a bit of history behind new_options, originally there was save/replace options on the VFS layer so the 'data' passed must not change (thus strdup), this got cleaned up in later patches. But not completely. There's no reason to do the strdup in cases where the filesystem does not need to reuse the 'data' again, because strsep would modify it directly. Fixes: c8f33d0bec99 ("affs: kstrdup() memory handling") Signed-off-by: Navid Emamdoost [ update changelog ] Signed-off-by: David Sterba Signed-off-by: Sasha Levin --- fs/affs/super.c | 6 ------ 1 file changed, 6 deletions(-) (limited to 'fs') diff --git a/fs/affs/super.c b/fs/affs/super.c index 884bedab7266..789a1c7db5d8 100644 --- a/fs/affs/super.c +++ b/fs/affs/super.c @@ -559,14 +559,9 @@ affs_remount(struct super_block *sb, int *flags, char *data) int root_block; unsigned long mount_flags; int res = 0; - char *new_opts; char volume[32]; char *prefix = NULL; - new_opts = kstrdup(data, GFP_KERNEL); - if (data && !new_opts) - return -ENOMEM; - pr_debug("%s(flags=0x%x,opts=\"%s\")\n", __func__, *flags, data); sync_filesystem(sb); @@ -577,7 +572,6 @@ affs_remount(struct super_block *sb, int *flags, char *data) &blocksize, &prefix, volume, &mount_flags)) { kfree(prefix); - kfree(new_opts); return -EINVAL; } -- cgit v1.2.3