From e9d4cf411f7582537ed0038d0f32a8743b75e58a Mon Sep 17 00:00:00 2001 From: Fabian Frederick Date: Wed, 8 Apr 2015 21:23:54 +0200 Subject: [PATCH] udf: improve error management in udf_CS0toUTF8() udf_CS0toUTF8() now returns -EINVAL on error. udf_load_pvoldesc() and udf_get_filename() do the same. Suggested-by: Jan Kara Signed-off-by: Fabian Frederick Signed-off-by: Jan Kara --- fs/udf/super.c | 23 ++++++++++++++--------- fs/udf/unicode.c | 7 ++++--- 2 files changed, 18 insertions(+), 12 deletions(-) diff --git a/fs/udf/super.c b/fs/udf/super.c index 6299f341967b..c6a8f5f79443 100644 --- a/fs/udf/super.c +++ b/fs/udf/super.c @@ -927,17 +927,22 @@ static int udf_load_pvoldesc(struct super_block *sb, sector_t block) #endif } - if (!udf_build_ustr(instr, pvoldesc->volIdent, 32)) - if (udf_CS0toUTF8(outstr, instr)) { - strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name, - outstr->u_len > 31 ? 31 : outstr->u_len); - udf_debug("volIdent[] = '%s'\n", - UDF_SB(sb)->s_volume_ident); - } + if (!udf_build_ustr(instr, pvoldesc->volIdent, 32)) { + ret = udf_CS0toUTF8(outstr, instr); + if (ret < 0) + goto out_bh; + + strncpy(UDF_SB(sb)->s_volume_ident, outstr->u_name, + outstr->u_len > 31 ? 31 : outstr->u_len); + udf_debug("volIdent[] = '%s'\n", UDF_SB(sb)->s_volume_ident); + } if (!udf_build_ustr(instr, pvoldesc->volSetIdent, 128)) - if (udf_CS0toUTF8(outstr, instr)) - udf_debug("volSetIdent[] = '%s'\n", outstr->u_name); + ret = udf_CS0toUTF8(outstr, instr); + if (ret < 0) + goto out_bh; + + udf_debug("volSetIdent[] = '%s'\n", outstr->u_name); ret = 0; out_bh: diff --git a/fs/udf/unicode.c b/fs/udf/unicode.c index 41c3bef1d226..35cc9477b066 100644 --- a/fs/udf/unicode.c +++ b/fs/udf/unicode.c @@ -89,7 +89,7 @@ static void udf_build_ustr_exact(struct ustr *dest, dstring *ptr, int exactsize) * both of type "struct ustr *" * * POST-CONDITIONS - * Zero on success. + * >= 0 on success. * * HISTORY * November 12, 1997 - Andrew E. Mileski @@ -112,7 +112,7 @@ int udf_CS0toUTF8(struct ustr *utf_o, const struct ustr *ocu_i) memset(utf_o, 0, sizeof(struct ustr)); pr_err("unknown compression code (%d) stri=%s\n", cmp_id, ocu_i->u_name); - return 0; + return -EINVAL; } ocu = ocu_i->u_name; @@ -350,7 +350,8 @@ int udf_get_filename(struct super_block *sb, uint8_t *sname, int slen, udf_build_ustr_exact(unifilename, sname, slen); if (UDF_QUERY_FLAG(sb, UDF_FLAG_UTF8)) { - if (!udf_CS0toUTF8(filename, unifilename)) { + ret = udf_CS0toUTF8(filename, unifilename); + if (ret < 0) { udf_debug("Failed in udf_get_filename: sname = %s\n", sname); goto out2; -- 2.30.2