| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <20070605020614.3f06b2ab.akpm@linux-foundation.org>
Date: Tue, 5 Jun 2007 02:06:14 -0700
From: Andrew Morton <akpm@...ux-foundation.org>
To: linux-wireless@...r.kernel.org
Cc: netdev@...r.kernel.org
Subject: warnings in git-wireless
i386 allmodconfig isn't that hard, guys.
drivers/net/wireless/mac80211/zd1211rw/zd_mac.c:600: warning: 'fill_rt_header' defined but not used
drivers/net/wireless/mac80211/iwlwifi/iwl-4965.c: In function 'iwl_hw_tx_queue_free_tfd':
drivers/net/wireless/mac80211/iwlwifi/iwl-4965.c:964: warning: left shift count >= width of type
drivers/net/wireless/mac80211/iwlwifi/iwl-4965.c: In function 'iwl_hw_tx_queue_attach_buffer_to_tfd':
drivers/net/wireless/mac80211/iwlwifi/iwl-4965.c:2041: warning: left shift count >= width of type
drivers/net/wireless/mac80211/iwlwifi/iwl-4965.c:2041: warning: left shift count >= width of type
drivers/net/wireless/mac80211/iwlwifi/iwl-4965.c:2047: warning: left shift count >= width of type
drivers/net/wireless/mac80211/iwlwifi/iwl-4965.c:2050: warning: left shift count >= width of type
With some trepidation I looked in just that header.
> #define iwl_get_bits(src, pos, len) \
> ({ \
> u32 __tmp = le32_to_cpu(src); \
> __tmp >>= pos; \
> __tmp &= (1UL << len) - 1; \
> __tmp; \
> })
Can be a inlined C function. Should be commented.
> #define iwl_set_bits(dst, pos, len, val) \
> ({ \
> u32 __tmp = le32_to_cpu(*dst); \
> __tmp &= ~((1UL << (pos+len)) - (1 << pos)); \
> __tmp |= (val & ((1UL << len) - 1)) << pos; \
> *dst = cpu_to_le32(__tmp); \
> })
Ditto. Whitespace broken.
> #define _IWL_SET_BITS(s, d, o, l, v) \
> iwl_set_bits(&s.d, o, l, v)
>
> #define IWL_SET_BITS(s, sym, v) \
> _IWL_SET_BITS((s), IWL_ ## sym ## _SYM, IWL_ ## sym ## _POS, IWL_ ## sym ## _LEN, (v))
>
> #define _IWL_GET_BITS(s, v, o, l) \
> iwl_get_bits(s.v, o, l)
>
> #define IWL_GET_BITS(s, sym) \
> _IWL_GET_BITS((s), IWL_ ## sym ## _SYM, IWL_ ## sym ## _POS, IWL_ ## sym ## _LEN)
Shudder.
> /*
> * make C=2 CF=-Wall will complain if you use ARRAY_SIZE on global data
> */
> #define GLOBAL_ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
This is identical to ARRAY_SIZE.
And if there's some problem with ARRAY_SIZE then fix ARRAY_SIZE! Don't go
off and create some private thing and leave everyone else twisting in the
wind.
> /* Debug and printf string expansion helpers for printing bitfields */
> #define BIT_FMT8 "%c%c%c%c-%c%c%c%c"
> #define BIT_FMT16 BIT_FMT8 ":" BIT_FMT8
> #define BIT_FMT32 BIT_FMT16 " " BIT_FMT16
>
> #define BITC(x,y) (((x>>y)&1)?'1':'0')
> #define BIT_ARG8(x) \
> BITC(x,7),BITC(x,6),BITC(x,5),BITC(x,4),\
> BITC(x,3),BITC(x,2),BITC(x,1),BITC(x,0)
>
> #define BIT_ARG16(x) \
> BITC(x,15),BITC(x,14),BITC(x,13),BITC(x,12),\
> BITC(x,11),BITC(x,10),BITC(x,9),BITC(x,8),\
> BIT_ARG8(x)
>
> #define BIT_ARG32(x) \
> BITC(x,31),BITC(x,30),BITC(x,29),BITC(x,28),\
> BITC(x,27),BITC(x,26),BITC(x,25),BITC(x,24),\
> BITC(x,23),BITC(x,22),BITC(x,21),BITC(x,20),\
> BITC(x,19),BITC(x,18),BITC(x,17),BITC(x,16),\
> BIT_ARG16(x)
None of the above is appropriate to a driver-private header.
> #define KELVIN_TO_CELSIUS(x) ((x)-273)
Nor is that.
> #define IEEE80211_CHAN_W_RADAR_DETECT 0x00000010
>
> static inline struct ieee80211_conf *ieee80211_get_hw_conf(struct ieee80211_hw
> *hw)
> {
> return &hw->conf;
> }
>
> static inline const struct ieee80211_hw_mode *iwl_get_hw_mode(struct iwl_priv
> *priv, int mode)
> {
> int i;
>
> for (i = 0; i < 3; i++)
> if (priv->modes[i].mode == mode)
> return &priv->modes[i];
>
> return NULL;
> }
Far too large to inline, has five callsites.
> #define WLAN_FC_GET_TYPE(fc) (((fc) & IEEE80211_FCTL_FTYPE))
> #define WLAN_FC_GET_STYPE(fc) (((fc) & IEEE80211_FCTL_STYPE))
> #define WLAN_GET_SEQ_FRAG(seq) ((seq) & 0x000f)
> #define WLAN_GET_SEQ_SEQ(seq) ((seq) >> 4)
These don't need to be macros
> #define QOS_CONTROL_LEN 2
>
> static inline u16 *ieee80211_get_qos_ctrl(struct ieee80211_hdr *hdr)
> {
> int hdr_len = ieee80211_get_hdrlen(hdr->frame_control);
> if (hdr->frame_control & IEEE80211_STYPE_QOS_DATA)
> return (u16 *) ((u8 *) hdr + (hdr_len) - QOS_CONTROL_LEN);
> return NULL;
> }
Two callsites, too large to inline.
> #define IEEE80211_STYPE_BACK_REQ 0x0080
> #define IEEE80211_STYPE_BACK 0x0090
>
> #define ieee80211_is_back_request(fc) \
> ((WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_CTL) && \
> (WLAN_FC_GET_STYPE(fc) == IEEE80211_STYPE_BACK_REQ))
>
> #define ieee80211_is_probe_response(fc) \
> ((WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_MGMT) && \
> ( WLAN_FC_GET_STYPE(fc) == IEEE80211_STYPE_PROBE_RESP ))
>
> #define ieee80211_is_probe_request(fc) \
> ((WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_MGMT) && \
> ( WLAN_FC_GET_STYPE(fc) ==IEEE80211_STYPE_PROBE_REQ ))
>
> #define ieee80211_is_beacon(fc) \
> ((WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_MGMT) && \
> ( WLAN_FC_GET_STYPE(fc) ==IEEE80211_STYPE_BEACON ))
>
> #define ieee80211_is_atim(fc) \
> ((WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_MGMT) && \
> ( WLAN_FC_GET_STYPE(fc) ==IEEE80211_STYPE_ATIM ))
>
> #define ieee80211_is_management(fc) \
> (WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_MGMT)
>
> #define ieee80211_is_control(fc) \
> (WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_CTL)
>
> #define ieee80211_is_data(fc) \
> (WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_DATA)
>
> #define ieee80211_is_assoc_request(fc) \
> ((WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_MGMT) && \
> (WLAN_FC_GET_STYPE(fc) == IEEE80211_STYPE_ASSOC_REQ))
>
> #define ieee80211_is_assoc_response(fc) \
> ((WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_MGMT) && \
> (WLAN_FC_GET_STYPE(fc) == IEEE80211_STYPE_ASSOC_RESP))
>
> #define ieee80211_is_auth(fc) \
> ((WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_MGMT) && \
> (WLAN_FC_GET_STYPE(fc) == IEEE80211_STYPE_ASSOC_REQ))
>
> #define ieee80211_is_deauth(fc) \
> ((WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_MGMT) && \
> (WLAN_FC_GET_STYPE(fc) == IEEE80211_STYPE_ASSOC_REQ))
>
> #define ieee80211_is_disassoc(fc) \
> ((WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_MGMT) && \
> (WLAN_FC_GET_STYPE(fc) == IEEE80211_STYPE_ASSOC_REQ))
>
> #define ieee80211_is_reassoc_request(fc) \
> ((WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_MGMT) && \
> (WLAN_FC_GET_STYPE(fc) == IEEE80211_STYPE_REASSOC_REQ))
>
> #define ieee80211_is_reassoc_response(fc) \
> ((WLAN_FC_GET_TYPE(fc) == IEEE80211_FTYPE_MGMT) && \
> (WLAN_FC_GET_STYPE(fc) == IEEE80211_STYPE_REASSOC_RESP))
None of the above should be macros.
> static inline int iwl_is_empty_essid(const char *essid, int essid_len)
> {
> /* Single white space is for Linksys APs */
> if (essid_len == 1 && essid[0] == ' ')
> return 1;
>
> /* Otherwise, if the entire essid is 0, we assume it is hidden */
> while (essid_len) {
> essid_len--;
> if (essid[essid_len] != '\0')
> return 0;
> }
>
> return 1;
> }
The above large function gets inlined into iwl_escape_essid()
> static inline int iwl_check_bits(unsigned long field, unsigned long mask)
> {
> return ((field & mask) == mask) ? 1 : 0;
> }
>
> static inline const char *iwl_escape_essid(const char *essid, u8 essid_len)
> {
> static char escaped[IW_ESSID_MAX_SIZE * 2 + 1];
> const char *s = essid;
> char *d = escaped;
>
> if (iwl_is_empty_essid(essid, essid_len)) {
> memcpy(escaped, "<hidden>", sizeof("<hidden>"));
> return escaped;
> }
>
> essid_len = min(essid_len, (u8) IW_ESSID_MAX_SIZE);
> while (essid_len--) {
> if (*s == '\0') {
> *d++ = '\\';
> *d++ = '0';
> s++;
> } else {
> *d++ = *s++;
> }
> }
> *d = '\0';
> return escaped;
> }
This now-enormous function has three callsites. Madness!
> static inline unsigned long elapsed_jiffies(unsigned long start,
> unsigned long end)
> {
> if (end > start)
> return end - start;
>
> return end + (MAX_JIFFY_OFFSET - start);
> }
Whatever this uncommented function is doing, it is not appropriate to a
per-driver header file.
> #include <linux/ctype.h>
This should go at the top of the file.
> static inline int snprint_line(char *buf, size_t count,
> const u8 * data, u32 len, u32 ofs)
> {
> int out, i, j, l;
> char c;
>
> out = snprintf(buf, count, "%08X", ofs);
>
> for (l = 0, i = 0; i < 2; i++) {
> out += snprintf(buf + out, count - out, " ");
> for (j = 0; j < 8 && l < len; j++, l++)
> out +=
> snprintf(buf + out, count - out, "%02X ",
> data[(i * 8 + j)]);
> for (; j < 8; j++)
> out += snprintf(buf + out, count - out, " ");
> }
> out += snprintf(buf + out, count - out, " ");
> for (l = 0, i = 0; i < 2; i++) {
> out += snprintf(buf + out, count - out, " ");
> for (j = 0; j < 8 && l < len; j++, l++) {
> c = data[(i * 8 + j)];
> if (!isascii(c) || !isprint(c))
> c = '.';
>
> out += snprintf(buf + out, count - out, "%c", c);
> }
>
> for (; j < 8; j++)
> out += snprintf(buf + out, count - out, " ");
> }
>
> return out;
> }
We're kidding. Three callsites!
Dump the whole thing, use lib/hexdump.c.
> #ifdef CONFIG_IWLWIFI_DEBUG
> static inline void printk_buf(int level, const void *p, u32 len)
> {
> const u8 *data = p;
> char line[81];
> u32 ofs = 0;
> if (!(iwl_debug_level & level))
> return;
>
> while (len) {
> snprint_line(line, sizeof(line), &data[ofs],
> min(len, 16U), ofs);
> printk(KERN_DEBUG "%s\n", line);
> ofs += 16;
> len -= min(len, 16U);
> }
> }
This is even huger and it has six callsites.
> #else
> #define printk_buf(level, p, len) do {} while (0)
> #endif
>
> #endif /* __iwl_helpers_h__ */
And that's one file out of a 3MB diff.
Please, don't anybody dare think about thinking about letting this anywhere
near mainline until it has had a thorough review. Or at least, a little bit
of review.
<goes back to fixing all the new compile errors and warnings>
-
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists