| Message ID | 20230523072421.1616607-1-zangyangyang1@xiaomi.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [f2fs-dev] f2fs_io: Fix integer multiplication overflow error in fiemap | expand |
On 2023/5/23 15:24, zangyangyang1 wrote: > When using fiemap to obtain the block address of files > larger than 2GB ((2147483647+1) bytes), an integer > multiplication overflow error will occur. > This issue is caused by the following code: > start = atoi(argv[1]) * F2FS_BLKSIZE; > length = atoi(argv[2]) * F2FS_BLKSIZE; > > Signed-off-by: zangyangyang1 <zangyangyang1@xiaomi.com> > --- > tools/f2fs_io/f2fs_io.c | 10 +++++----- > 1 file changed, 5 insertions(+), 5 deletions(-) > > diff --git a/tools/f2fs_io/f2fs_io.c b/tools/f2fs_io/f2fs_io.c > index 5bc0baf..ad6b5f0 100644 > --- a/tools/f2fs_io/f2fs_io.c > +++ b/tools/f2fs_io/f2fs_io.c > @@ -809,15 +809,15 @@ static void do_fiemap(int argc, char **argv, const struct cmd_desc *cmd) > } > > memset(fm, 0, sizeof(struct fiemap)); > - start = atoi(argv[1]) * F2FS_BLKSIZE; > - length = atoi(argv[2]) * F2FS_BLKSIZE; How about? start = (long long)atoi(argv[1]) * F2FS_BLKSIZE; length = (long long)atoi(argv[2]) * F2FS_BLKSIZE; Thanks, > - fm->fm_start = start; > - fm->fm_length = length; > + start = atoll(argv[1]); > + length = atoll(argv[2]); > + fm->fm_start = start * F2FS_BLKSIZE; > + fm->fm_length = length * F2FS_BLKSIZE; > > fd = xopen(argv[3], O_RDONLY | O_LARGEFILE, 0); > > printf("Fiemap: offset = %"PRIu64" len = %"PRIu64"\n", > - start / F2FS_BLKSIZE, length / F2FS_BLKSIZE); > + start, length); > if (ioctl(fd, FS_IOC_FIEMAP, fm) < 0) > die_errno("FIEMAP failed"); > > -- > 2.40.1 > > #/******本邮件及其附件含有小米公司的保密信息，仅限于发送给上面地址中列出的个人或群组。禁止任何其他人以任何形式使用（包括但不限于全部或部分地泄露、复制、或散发）本邮件中的信息。如果您错收了本邮件，请您立即电话或邮件通知发件人并删除本邮件！ This e-mail and its attachments contain confidential information from XIAOMI, which is intended only for the person or entity whose address is listed above. Any use of the information contained herein in any way (including, but not limited to, total or partial disclosure, reproduction, or dissemination) by persons other than the intended recipient(s) is prohibited. If you receive this e-mail in error, please notify the sender by phone or email immediately and delete it!******/#
diff --git a/tools/f2fs_io/f2fs_io.c b/tools/f2fs_io/f2fs_io.c index 5bc0baf..ad6b5f0 100644 --- a/tools/f2fs_io/f2fs_io.c +++ b/tools/f2fs_io/f2fs_io.c @@ -809,15 +809,15 @@ static void do_fiemap(int argc, char **argv, const struct cmd_desc *cmd) } memset(fm, 0, sizeof(struct fiemap)); - start = atoi(argv[1]) * F2FS_BLKSIZE; - length = atoi(argv[2]) * F2FS_BLKSIZE; - fm->fm_start = start; - fm->fm_length = length; + start = atoll(argv[1]); + length = atoll(argv[2]); + fm->fm_start = start * F2FS_BLKSIZE; + fm->fm_length = length * F2FS_BLKSIZE; fd = xopen(argv[3], O_RDONLY | O_LARGEFILE, 0); printf("Fiemap: offset = %"PRIu64" len = %"PRIu64"\n", - start / F2FS_BLKSIZE, length / F2FS_BLKSIZE); + start, length); if (ioctl(fd, FS_IOC_FIEMAP, fm) < 0) die_errno("FIEMAP failed");
When using fiemap to obtain the block address of files larger than 2GB ((2147483647+1) bytes), an integer multiplication overflow error will occur. This issue is caused by the following code: start = atoi(argv[1]) * F2FS_BLKSIZE; length = atoi(argv[2]) * F2FS_BLKSIZE; Signed-off-by: zangyangyang1 <zangyangyang1@xiaomi.com> --- tools/f2fs_io/f2fs_io.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) -- 2.40.1 #/******±¾Óʼþ¼°Æ丽¼þº¬ÓÐСÃ×¹«Ë¾µÄ±£ÃÜÐÅÏ¢£¬½öÏÞÓÚ·¢Ë͸øÉÏÃæµØÖ·ÖÐÁгöµÄ¸öÈË»òȺ×é¡£½ûÖ¹ÈκÎÆäËûÈËÒÔÈκÎÐÎʽʹÓ㨰üÀ¨µ«²»ÏÞÓÚÈ«²¿»ò²¿·ÖµØй¶¡¢¸´ÖÆ¡¢»òÉ¢·¢£©±¾ÓʼþÖеÄÐÅÏ¢¡£Èç¹ûÄú´íÊÕÁ˱¾Óʼþ£¬ÇëÄúÁ¢¼´µç»°»òÓʼþ֪ͨ·¢¼þÈ˲¢É¾³ý±¾Óʼþ£¡ This e-mail and its attachments contain confidential information from XIAOMI, which is intended only for the person or entity whose address is listed above. Any use of the information contained herein in any way (including, but not limited to, total or partial disclosure, reproduction, or dissemination) by persons other than the intended recipient(s) is prohibited. If you receive this e-mail in error, please notify the sender by phone or email immediately and delete it!******/#