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fs/squashfs: sqfs_close/sqfs_read_sblk: set ctxt.sblk to NULL after free

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This will prevent a double free error if sqfs_close() is called twice.

Signed-off-by: Richard Genoud <richard.genoud@posteo.net>
This commit is contained in:
Richard Genoud 2020-11-24 18:07:52 +01:00 committed by Tom Rini
parent ab31883ae7
commit 7e932ac790
1 changed files with 4 additions and 2 deletions
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6
fs/squashfs/sqfs.c
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@ -49,6 +49,7 @@ static int sqfs_read_sblk(struct squashfs_super_block **sblk)
if (sqfs_disk_read(0, 1, *sblk) != 1) { if (sqfs_disk_read(0, 1, *sblk) != 1) {
free(*sblk); free(*sblk);
sblk = NULL;
return -EINVAL; return -EINVAL;
} }
@ -1689,9 +1690,10 @@ free_strings:
void sqfs_close(void) void sqfs_close(void)
{ {
free(ctxt.sblk);
ctxt.cur_dev = NULL;
sqfs_decompressor_cleanup(&ctxt); sqfs_decompressor_cleanup(&ctxt);
free(ctxt.sblk);
ctxt.sblk = NULL;
ctxt.cur_dev = NULL;
} }
void sqfs_closedir(struct fs_dir_stream *dirs) void sqfs_closedir(struct fs_dir_stream *dirs)