external/f2fs-tools/fsck/mount.c:584:4: error: 'snprintf' will always overflow;
destination buffer has size 30, but size argument is 31
[-Werror,-Wbuiltin-memcpy-chk-size]
584 | snprintf(str, 31, "%s[%d]", i == NAT_BITMAP ?
On 04/14, Chao Yu wrote:
> dump.f2fs -d 1 img
>
> ...
> checksum [0x829fb462 : 2191504482]
> nat_version_bitmap[0] [0x 0 : 0]
> nat_version_bitmap[1] [0x 0 : 0]
> nat_version_bitmap[2] [0x 0 : 0]
> ...
> nat_version_bitmap[463] [0x 0 : 0]
> sit_version_bitmap[0] [0x 0 : 0]
> sit_version_bitmap[1] [0x 0 : 0]
> sit_version_bitmap[2] [0x 0 : 0]
> sit_version_bitmap[3] [0x 0 : 0]
> ...
> sit_version_bitmap[47] [0x 0 : 0]
>
> Signed-off-by: Chao Yu <c...@kernel.org>
> ---
> fsck/mount.c | 31 ++++++++++++++++++++++++++++++-
> 1 file changed, 30 insertions(+), 1 deletion(-)
>
> diff --git a/fsck/mount.c b/fsck/mount.c
> index e7c4069..6648c69 100644
> --- a/fsck/mount.c
> +++ b/fsck/mount.c
> @@ -563,6 +563,33 @@ printout:
> printf("\n");
> }
>
> +void print_chksum(struct f2fs_checkpoint *cp)
> +{
> + unsigned int crc = le32_to_cpu(*(__le32 *)((unsigned char *)cp +
> + get_cp(checksum_offset)));
> +
> + printf("%-30s" "\t\t[0x%8x : %u]\n", "checksum", crc, crc);
> +}
> +
> +void print_version_bitmap(struct f2fs_sb_info *sbi)
> +{
> + char str[30];
> + int i, j;
> +
> + for (i = NAT_BITMAP; i <= SIT_BITMAP; i++) {
> + unsigned int *bitmap = __bitmap_ptr(sbi, i);
> + unsigned int size = round_up(__bitmap_size(sbi, i), 4);
> +
> + for (j = 0; j < size; j++) {
> + snprintf(str, 31, "%s[%d]", i == NAT_BITMAP ?
> + "nat_version_bitmap" :
> + "sit_version_bitmap", j);
> + printf("%-30s" "\t\t[0x%8x : %u]\n", str,
> + bitmap[i], bitmap[i]);
> + }
> + }
> +}
> +
> void print_ckpt_info(struct f2fs_sb_info *sbi)
> {
> struct f2fs_checkpoint *cp = F2FS_CKPT(sbi);
> @@ -618,7 +645,9 @@ printout:
> DISP_u32(cp, checksum_offset);
> DISP_u64(cp, elapsed_time);
>
> - DISP_u32(cp, sit_nat_version_bitmap[0]);
> + print_chksum(cp);
> + print_version_bitmap(sbi);
> +
> printf("\n\n");
> }
>
> --
> 2.49.0
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