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author | Artem Bityutskiy <artem.bityutskiy@linux.intel.com> | 2012-01-11 13:52:09 (GMT) |
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committer | Artem Bityutskiy <artem.bityutskiy@linux.intel.com> | 2012-01-13 10:46:21 (GMT) |
commit | beba006074e7170d3bc91470c8a6c914730d4c63 (patch) | |
tree | 3d7330a25a1c7c8228774ec9ff9cc7f1f2dcd1ab /fs/ubifs/debug.c | |
parent | d34315da9146253351146140ea4b277193ee5e5f (diff) | |
download | linux-beba006074e7170d3bc91470c8a6c914730d4c63.tar.xz |
UBIFS: use snprintf instead of sprintf when printing keys
Switch to 'snprintf()' which is more secure and reliable. This is also a
preparation to the subsequent key printing fixes.
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Diffstat (limited to 'fs/ubifs/debug.c')
-rw-r--r-- | fs/ubifs/debug.c | 38 |
1 files changed, 20 insertions, 18 deletions
diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c index b09ba2d..6ae9fdc 100644 --- a/fs/ubifs/debug.c +++ b/fs/ubifs/debug.c @@ -103,8 +103,8 @@ static const char *get_dent_type(int type) } } -static void sprintf_key(const struct ubifs_info *c, const union ubifs_key *key, - char *buffer) +static void snprintf_key(const struct ubifs_info *c, const union ubifs_key *key, + char *buffer, int len) { char *p = buffer; int type = key_type(c, key); @@ -112,44 +112,46 @@ static void sprintf_key(const struct ubifs_info *c, const union ubifs_key *key, if (c->key_fmt == UBIFS_SIMPLE_KEY_FMT) { switch (type) { case UBIFS_INO_KEY: - sprintf(p, "(%lu, %s)", (unsigned long)key_inum(c, key), - get_key_type(type)); + len -= snprintf(p, len, "(%lu, %s)", + (unsigned long)key_inum(c, key), + get_key_type(type)); break; case UBIFS_DENT_KEY: case UBIFS_XENT_KEY: - sprintf(p, "(%lu, %s, %#08x)", - (unsigned long)key_inum(c, key), - get_key_type(type), key_hash(c, key)); + len -= snprintf(p, len, "(%lu, %s, %#08x)", + (unsigned long)key_inum(c, key), + get_key_type(type), key_hash(c, key)); break; case UBIFS_DATA_KEY: - sprintf(p, "(%lu, %s, %u)", - (unsigned long)key_inum(c, key), - get_key_type(type), key_block(c, key)); + len -= snprintf(p, len, "(%lu, %s, %u)", + (unsigned long)key_inum(c, key), + get_key_type(type), key_block(c, key)); break; case UBIFS_TRUN_KEY: - sprintf(p, "(%lu, %s)", - (unsigned long)key_inum(c, key), - get_key_type(type)); + len -= snprintf(p, len, "(%lu, %s)", + (unsigned long)key_inum(c, key), + get_key_type(type)); break; default: - sprintf(p, "(bad key type: %#08x, %#08x)", - key->u32[0], key->u32[1]); + len -= snprintf(p, len, "(bad key type: %#08x, %#08x)", + key->u32[0], key->u32[1]); } } else - sprintf(p, "bad key format %d", c->key_fmt); + len -= snprintf(p, len, "bad key format %d", c->key_fmt); + ubifs_assert(len > 0); } const char *dbg_key_str0(const struct ubifs_info *c, const union ubifs_key *key) { /* dbg_lock must be held */ - sprintf_key(c, key, dbg_key_buf0); + snprintf_key(c, key, dbg_key_buf0, sizeof(dbg_key_buf0) - 1); return dbg_key_buf0; } const char *dbg_key_str1(const struct ubifs_info *c, const union ubifs_key *key) { /* dbg_lock must be held */ - sprintf_key(c, key, dbg_key_buf1); + snprintf_key(c, key, dbg_key_buf1, sizeof(dbg_key_buf1) - 1); return dbg_key_buf1; } |