diff options
| author | Sami Tolvanen <samitolvanen@google.com> | 2021-04-08 11:28:34 -0700 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2021-04-08 16:04:22 -0700 |
| commit | 4f0f586bf0c898233d8f316f471a21db2abd522d (patch) | |
| tree | 3b3ec78051f5a5d2b96f834347355b1b306026ea /fs/gfs2 | |
| parent | 9f5b4009980f369acb80b72235b2d66c3fd6eca6 (diff) | |
treewide: Change list_sort to use const pointers
list_sort() internally casts the comparison function passed to it
to a different type with constant struct list_head pointers, and
uses this pointer to call the functions, which trips indirect call
Control-Flow Integrity (CFI) checking.
Instead of removing the consts, this change defines the
list_cmp_func_t type and changes the comparison function types of
all list_sort() callers to use const pointers, thus avoiding type
mismatches.
Suggested-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20210408182843.1754385-10-samitolvanen@google.com
Diffstat (limited to 'fs/gfs2')
| -rw-r--r-- | fs/gfs2/glock.c | 3 | ||||
| -rw-r--r-- | fs/gfs2/log.c | 2 | ||||
| -rw-r--r-- | fs/gfs2/lops.c | 3 |
3 files changed, 5 insertions, 3 deletions
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c index 9567520d79f7..c06a6cdf05de 100644 --- a/fs/gfs2/glock.c +++ b/fs/gfs2/glock.c @@ -1732,7 +1732,8 @@ void gfs2_glock_complete(struct gfs2_glock *gl, int ret) spin_unlock(&gl->gl_lockref.lock); } -static int glock_cmp(void *priv, struct list_head *a, struct list_head *b) +static int glock_cmp(void *priv, const struct list_head *a, + const struct list_head *b) { struct gfs2_glock *gla, *glb; diff --git a/fs/gfs2/log.c b/fs/gfs2/log.c index 6410281546f9..88649b43fcff 100644 --- a/fs/gfs2/log.c +++ b/fs/gfs2/log.c @@ -695,7 +695,7 @@ void log_flush_wait(struct gfs2_sbd *sdp) } } -static int ip_cmp(void *priv, struct list_head *a, struct list_head *b) +static int ip_cmp(void *priv, const struct list_head *a, const struct list_head *b) { struct gfs2_inode *ipa, *ipb; diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c index a82f4747aa8d..b4809967efc6 100644 --- a/fs/gfs2/lops.c +++ b/fs/gfs2/lops.c @@ -634,7 +634,8 @@ static void gfs2_check_magic(struct buffer_head *bh) kunmap_atomic(kaddr); } -static int blocknr_cmp(void *priv, struct list_head *a, struct list_head *b) +static int blocknr_cmp(void *priv, const struct list_head *a, + const struct list_head *b) { struct gfs2_bufdata *bda, *bdb; |