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From 88a334ac2f98affcc526e861c2ed1b8bd2c34b3c Mon Sep 17 00:00:00 2001
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From: Pavel Reichl <preichl@redhat.com>
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Date: Wed, 11 May 2022 23:20:43 +0200
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Subject: [PATCH] exfatprogs: fix some minor code issues
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* Add checking of function return value
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* Fix potentially overflowing expression
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Signed-off-by: Pavel Reichl <preichl@redhat.com>
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---
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fsck/de_iter.c | 9 ++++++---
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lib/libexfat.c | 13 ++++++++++---
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2 files changed, 16 insertions(+), 6 deletions(-)
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diff --git a/fsck/de_iter.c b/fsck/de_iter.c
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index bc95c49..587b027 100644
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--- a/fsck/de_iter.c
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+++ b/fsck/de_iter.c
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@@ -82,6 +82,9 @@ static int read_ahead_next_blocks(struct exfat_de_iter *iter,
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offset >= iter->ra_begin_offset) {
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ret = get_next_clus(exfat, iter->parent,
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p_clus, &ra_p_clus);
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+ if (ret)
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+ return ret;
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+
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if (ra_p_clus == EXFAT_EOF_CLUSTER)
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return -EIO;
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@@ -172,10 +175,10 @@ static ssize_t read_block(struct exfat_de_iter *iter, unsigned int block)
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ret = get_next_clus(exfat, iter->parent,
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prev_desc->p_clus, &desc->p_clus);
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desc->offset = 0;
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- if (!ret && desc->p_clus == EXFAT_EOF_CLUSTER)
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- return EOF;
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- else if (ret)
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+ if (ret)
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return ret;
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+ else if (desc->p_clus == EXFAT_EOF_CLUSTER)
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+ return EOF;
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}
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}
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diff --git a/lib/libexfat.c b/lib/libexfat.c
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index 42e3fdc..ee48d3a 100644
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--- a/lib/libexfat.c
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+++ b/lib/libexfat.c
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@@ -470,7 +470,12 @@ int exfat_set_volume_label(struct exfat_blk_dev *bd,
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exfat_err("volume entry write failed: %d\n", errno);
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return -1;
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}
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- fsync(bd->dev_fd);
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+
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+ if (fsync(bd->dev_fd) == -1) {
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+ exfat_err("failed to sync volume entry: %d, %s\n", errno,
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+ strerror(errno));
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+ return -1;
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+ }
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exfat_info("new label: %s\n", label_input);
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return 0;
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@@ -479,7 +484,8 @@ int exfat_set_volume_label(struct exfat_blk_dev *bd,
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int exfat_read_sector(struct exfat_blk_dev *bd, void *buf, unsigned int sec_off)
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{
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int ret;
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- unsigned long long offset = sec_off * bd->sector_size;
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+ unsigned long long offset =
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+ (unsigned long long)sec_off * bd->sector_size;
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ret = pread(bd->dev_fd, buf, bd->sector_size, offset);
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if (ret < 0) {
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@@ -493,7 +499,8 @@ int exfat_write_sector(struct exfat_blk_dev *bd, void *buf,
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unsigned int sec_off)
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{
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int bytes;
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- unsigned long long offset = sec_off * bd->sector_size;
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+ unsigned long long offset =
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+ (unsigned long long)sec_off * bd->sector_size;
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bytes = pwrite(bd->dev_fd, buf, bd->sector_size, offset);
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if (bytes != (int)bd->sector_size) {
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--
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2.35.3
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