From 265de8ce3d5b3c70644a1a45457580bb07548b56 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 11 Jul 2019 20:55:23 -0700 Subject: [PATCH] jffs2: pass the correct prototype to read_cache_page Fix the callback jffs2 passes to read_cache_page to actually have the proper type expected. Casting around function pointers can easily hide typing bugs, and defeats control flow protection. Link: http://lkml.kernel.org/r/20190520055731.24538-4-hch@lst.de Signed-off-by: Christoph Hellwig Reviewed-by: Kees Cook Cc: Nick Desaulniers Cc: Sami Tolvanen Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/jffs2/file.c | 4 ++-- fs/jffs2/fs.c | 2 +- fs/jffs2/os-linux.h | 2 +- 3 files changed, 4 insertions(+), 4 deletions(-) diff --git a/fs/jffs2/file.c b/fs/jffs2/file.c index 7d8654a1472e..f8fb89b10227 100644 --- a/fs/jffs2/file.c +++ b/fs/jffs2/file.c @@ -109,9 +109,9 @@ static int jffs2_do_readpage_nolock (struct inode *inode, struct page *pg) return ret; } -int jffs2_do_readpage_unlock(struct inode *inode, struct page *pg) +int jffs2_do_readpage_unlock(void *data, struct page *pg) { - int ret = jffs2_do_readpage_nolock(inode, pg); + int ret = jffs2_do_readpage_nolock(data, pg); unlock_page(pg); return ret; } diff --git a/fs/jffs2/fs.c b/fs/jffs2/fs.c index 112d85849db1..8a20ddd25f2d 100644 --- a/fs/jffs2/fs.c +++ b/fs/jffs2/fs.c @@ -687,7 +687,7 @@ unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c, struct page *pg; pg = read_cache_page(inode->i_mapping, offset >> PAGE_SHIFT, - (void *)jffs2_do_readpage_unlock, inode); + jffs2_do_readpage_unlock, inode); if (IS_ERR(pg)) return (void *)pg; diff --git a/fs/jffs2/os-linux.h b/fs/jffs2/os-linux.h index a2dbbb3f4c74..bd3d5f0ddc34 100644 --- a/fs/jffs2/os-linux.h +++ b/fs/jffs2/os-linux.h @@ -155,7 +155,7 @@ extern const struct file_operations jffs2_file_operations; extern const struct inode_operations jffs2_file_inode_operations; extern const struct address_space_operations jffs2_file_address_operations; int jffs2_fsync(struct file *, loff_t, loff_t, int); -int jffs2_do_readpage_unlock (struct inode *inode, struct page *pg); +int jffs2_do_readpage_unlock(void *data, struct page *pg); /* ioctl.c */ long jffs2_ioctl(struct file *, unsigned int, unsigned long);