From: Su Hui Date: Sun, 8 Oct 2023 06:39:30 +0000 (+0800) Subject: f2fs: avoid format-overflow warning X-Git-Tag: v5.15.140~34 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=e4088d7d8f1123006d46a42edf51b8c960a58ef9;p=thirdparty%2Fkernel%2Fstable.git f2fs: avoid format-overflow warning commit e0d4e8acb3789c5a8651061fbab62ca24a45c063 upstream. With gcc and W=1 option, there's a warning like this: fs/f2fs/compress.c: In function ‘f2fs_init_page_array_cache’: fs/f2fs/compress.c:1984:47: error: ‘%u’ directive writing between 1 and 7 bytes into a region of size between 5 and 8 [-Werror=format-overflow=] 1984 | sprintf(slab_name, "f2fs_page_array_entry-%u:%u", MAJOR(dev), MINOR(dev)); | ^~ String "f2fs_page_array_entry-%u:%u" can up to 35. The first "%u" can up to 4 and the second "%u" can up to 7, so total size is "24 + 4 + 7 = 35". slab_name's size should be 35 rather than 32. Cc: stable@vger.kernel.org Signed-off-by: Su Hui Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim Signed-off-by: Greg Kroah-Hartman --- diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c index 455fac164fda0..3982b4a7618ce 100644 --- a/fs/f2fs/compress.c +++ b/fs/f2fs/compress.c @@ -1906,7 +1906,7 @@ void f2fs_destroy_compress_inode(struct f2fs_sb_info *sbi) int f2fs_init_page_array_cache(struct f2fs_sb_info *sbi) { dev_t dev = sbi->sb->s_bdev->bd_dev; - char slab_name[32]; + char slab_name[35]; sprintf(slab_name, "f2fs_page_array_entry-%u:%u", MAJOR(dev), MINOR(dev));