diff options
| author | Christophe JAILLET <christophe.jaillet@wanadoo.fr> | 2023-10-10 18:04:42 -0400 |
|---|---|---|
| committer | David Teigland <teigland@redhat.com> | 2023-10-12 15:19:37 -0500 |
| commit | b859e01054354033f480d9df41b0ebc2c7537379 (patch) | |
| tree | 0dd969f86d5249315aa9d7dc5f340e46e42f156b /fs/dlm | |
| parent | 19b3102c0b5350621e7492281f2be0f071fb7e31 (diff) | |
fs: dlm: Fix the size of a buffer in dlm_create_debug_file()
8 is not the maximum size of the suffix used when creating debugfs files.
Let the compiler compute the correct size, and only give a hint about the
longest possible string that is used.
When building with W=1, this fixes the following warnings:
fs/dlm/debug_fs.c: In function ‘dlm_create_debug_file’:
fs/dlm/debug_fs.c:1020:58: error: ‘snprintf’ output may be truncated before the last format character [-Werror=format-truncation=]
1020 | snprintf(name, DLM_LOCKSPACE_LEN + 8, "%s_waiters", ls->ls_name);
| ^
fs/dlm/debug_fs.c:1020:9: note: ‘snprintf’ output between 9 and 73 bytes into a destination of size 72
1020 | snprintf(name, DLM_LOCKSPACE_LEN + 8, "%s_waiters", ls->ls_name);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
fs/dlm/debug_fs.c:1031:50: error: ‘_queued_asts’ directive output may be truncated writing 12 bytes into a region of size between 8 and 72 [-Werror=format-truncation=]
1031 | snprintf(name, DLM_LOCKSPACE_LEN + 8, "%s_queued_asts", ls->ls_name);
| ^~~~~~~~~~~~
fs/dlm/debug_fs.c:1031:9: note: ‘snprintf’ output between 13 and 77 bytes into a destination of size 72
1031 | snprintf(name, DLM_LOCKSPACE_LEN + 8, "%s_queued_asts", ls->ls_name);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Fixes: 541adb0d4d10b ("fs: dlm: debugfs for queued callbacks")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
Diffstat (limited to 'fs/dlm')
| -rw-r--r-- | fs/dlm/debug_fs.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/dlm/debug_fs.c b/fs/dlm/debug_fs.c index e9726c6cbdf2..c93359ceaae6 100644 --- a/fs/dlm/debug_fs.c +++ b/fs/dlm/debug_fs.c @@ -973,7 +973,8 @@ void dlm_delete_debug_comms_file(void *ctx) void dlm_create_debug_file(struct dlm_ls *ls) { - char name[DLM_LOCKSPACE_LEN + 8]; + /* Reserve enough space for the longest file name */ + char name[DLM_LOCKSPACE_LEN + sizeof("_queued_asts")]; /* format 1 */ |