mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-23 02:51:47 +00:00
Code Issues Releases Wiki Activity

scsi: ufs: core: Leave space for '\0' in utf8 desc string

Browse source 
[ Upstream commit a75a16c62a ]

utf16s_to_utf8s does not NULL terminate the output string. For us to be
able to add a NULL character when utf16s_to_utf8s returns, we need to make
sure that there is space for such NULL character at the end of the output
buffer. We can achieve this by passing an output buffer size to
utf16s_to_utf8s that is one character less than what we allocated.

Other call sites of utf16s_to_utf8s appear to be using the same technique
where they artificially reduce the buffer size by one to leave space for a
NULL character or line feed character.

Fixes: 4b828fe156 ("scsi: ufs: revamp string descriptor reading")
Reviewed-by: Mars Cheng <marscheng@google.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Yen-lin Lai <yenlinlai@google.com>
Signed-off-by: Daniel Mentz <danielmentz@google.com>
Link: https://lore.kernel.org/r/20231017182026.2141163-1-danielmentz@google.com
Reviewed-by: Avri Altman <avri.altman@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Daniel Mentz 2023-10-17 11:20:26 -07:00 committed by Greg Kroah-Hartman
parent f12251ed5d
commit 362b2f65d6
1 changed files with 1 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
drivers/ufs/core/ufshcd.c
View file

@ -3632,7 +3632,7 @@ int ufshcd_read_string_desc(struct ufs_hba *hba, u8 desc_index,
*/
ret = utf16s_to_utf8s(uc_str->uc,
uc_str->len - QUERY_DESC_HDR_SIZE,
UTF16_BIG_ENDIAN, str, ascii_len);
UTF16_BIG_ENDIAN, str, ascii_len - 1);
/* replace non-printable or non-ASCII characters with spaces */
for (i = 0; i < ret; i++)