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| author | BangLang Huang <banglang.huang@foxmail.com> | 2017-02-24 10:16:17 +0800 |
|---|---|---|
| committer | Alexander Couzens <lynxis@fe80.eu> | 2017-08-22 14:31:32 +0200 |
| commit | 1948d8e08c72106a01b359a30217cf92657cc79d (patch) | |
| tree | bbc4501f33905e3baf69e8e908ae5ca68627939b | |
| parent | e622b307307856d284addc52e8172fdf66252d96 (diff) | |
| download | upstream-1948d8e08c72106a01b359a30217cf92657cc79d.tar.gz upstream-1948d8e08c72106a01b359a30217cf92657cc79d.tar.bz2 upstream-1948d8e08c72106a01b359a30217cf92657cc79d.zip | |
nvram: fix memory leak
Fix memory leak on nvram_open() and nvram_open_rdonly().
For nvram_open(), the 'fd' should be closed on error, and
mmap_area should be unmap when nvram magic can not be found.
For nvram_open_rdonly(), the 'file' variable should free before
return. Once nvram_find_mtd() return successfully, it will allocate
memory to save mtd device string.
Signed-off-by: BangLang Huang <banglang.huang@foxmail.com>
| -rw-r--r-- | package/utils/nvram/src/cli.c | 10 | ||||
| -rw-r--r-- | package/utils/nvram/src/nvram.c | 3 |
2 files changed, 10 insertions, 3 deletions
diff --git a/package/utils/nvram/src/cli.c b/package/utils/nvram/src/cli.c index 488d641cfc..4f9c77804d 100644 --- a/package/utils/nvram/src/cli.c +++ b/package/utils/nvram/src/cli.c @@ -27,13 +27,17 @@ static nvram_handle_t * nvram_open_rdonly(void) { - const char *file = nvram_find_staging(); + char *file = nvram_find_staging(); if( file == NULL ) file = nvram_find_mtd(); - if( file != NULL ) - return nvram_open(file, NVRAM_RO); + if( file != NULL ) { + nvram_handle_t *h = nvram_open(file, NVRAM_RO); + if( strcmp(file, NVRAM_STAGING) ) + free(file); + return h; + } return NULL; } diff --git a/package/utils/nvram/src/nvram.c b/package/utils/nvram/src/nvram.c index 0e4294391a..ca89392107 100644 --- a/package/utils/nvram/src/nvram.c +++ b/package/utils/nvram/src/nvram.c @@ -380,7 +380,9 @@ nvram_handle_t * nvram_open(const char *file, int rdonly) if( offset < 0 ) { + munmap(mmap_area, nvram_part_size); free(mtd); + close(fd); return NULL; } else if( (h = malloc(sizeof(nvram_handle_t))) != NULL ) @@ -410,6 +412,7 @@ nvram_handle_t * nvram_open(const char *file, int rdonly) } free(mtd); + close(fd); return NULL; } |