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
| ||
|
Date: Sun, 01 Mar 2009 20:25:38 +0100 From: Frank Seidel <fseidel@...e.de> To: linux kernel <linux-kernel@...r.kernel.org> Cc: akpm@...ux-foundation.org, "linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>, "John W. Linville" <linville@...driver.com>, Zhu Yi <yi.zhu@...el.com>, "Chatre, Reinette" <reinette.chatre@...el.com>, Frank Seidel <fseidel@...e.de>, Frank Seidel <frank@...eidel.de>, kernalert.de@...il.com, Mohamed Abbas <mohamed.abbas@...el.com>, Tomas Winkler <tomas.winkler@...el.com>, Abhijeet Kolekar <abhijeet.kolekar@...el.com>, Johannes Berg <johannes@...solutions.net> Subject: [PATCH] iwlwifi: reduce stack size From: Frank Seidel <frank@...eidel.de> Reduce stack memory footprint of iwlwifi. (From >1000 bytes for each *_table_read on i386 down to 32) Signed-off-by: Frank Seidel <frank@...eidel.de> --- drivers/net/wireless/iwlwifi/iwl-3945-rs.c | 11 +++++++++-- drivers/net/wireless/iwlwifi/iwl-agn-rs.c | 23 +++++++++++++++++++---- 2 files changed, 28 insertions(+), 6 deletions(-) --- a/drivers/net/wireless/iwlwifi/iwl-3945-rs.c +++ b/drivers/net/wireless/iwlwifi/iwl-3945-rs.c @@ -815,11 +815,16 @@ static ssize_t iwl3945_sta_dbgfs_stats_t char __user *user_buf, size_t count, loff_t *ppos) { - char buff[1024]; + char *buff; int desc = 0; int j; + ssize_t ret; struct iwl3945_rs_sta *lq_sta = file->private_data; + buff = kmalloc(1024, GFP_KERNEL); + if (!buff) + return -ENOMEM; + desc += sprintf(buff + desc, "tx packets=%d last rate index=%d\n" "rate=0x%X flush time %d\n", lq_sta->tx_packets, @@ -832,7 +837,9 @@ static ssize_t iwl3945_sta_dbgfs_stats_t lq_sta->win[j].success_counter, lq_sta->win[j].success_ratio); } - return simple_read_from_buffer(user_buf, count, ppos, buff, desc); + ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); + kfree(buff); + return ret; } static const struct file_operations rs_sta_dbgfs_stats_table_ops = { --- a/drivers/net/wireless/iwlwifi/iwl-agn-rs.c +++ b/drivers/net/wireless/iwlwifi/iwl-agn-rs.c @@ -2474,12 +2474,17 @@ static ssize_t rs_sta_dbgfs_scale_table_ static ssize_t rs_sta_dbgfs_scale_table_read(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) { - char buff[1024]; + char *buff; int desc = 0; int i = 0; + ssize_t ret; struct iwl_lq_sta *lq_sta = file->private_data; + buff = kmalloc(1024, GFP_KERNEL); + if (!buff) + return -ENOMEM; + desc += sprintf(buff+desc, "sta_id %d\n", lq_sta->lq.sta_id); desc += sprintf(buff+desc, "failed=%d success=%d rate=0%X\n", lq_sta->total_failed, lq_sta->total_success, @@ -2511,7 +2516,9 @@ static ssize_t rs_sta_dbgfs_scale_table_ desc += sprintf(buff+desc, " rate[%d] 0x%X\n", i, le32_to_cpu(lq_sta->lq.rs_table[i].rate_n_flags)); - return simple_read_from_buffer(user_buf, count, ppos, buff, desc); + ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); + kfree(buff); + return ret; } static const struct file_operations rs_sta_dbgfs_scale_table_ops = { @@ -2522,11 +2529,17 @@ static const struct file_operations rs_s static ssize_t rs_sta_dbgfs_stats_table_read(struct file *file, char __user *user_buf, size_t count, loff_t *ppos) { - char buff[1024]; + char *buff; int desc = 0; int i, j; + ssize_t ret; struct iwl_lq_sta *lq_sta = file->private_data; + + buff = kmalloc(1024, GFP_KERNEL); + if (!buff) + return -ENOMEM; + for (i = 0; i < LQ_SIZE; i++) { desc += sprintf(buff+desc, "%s type=%d SGI=%d FAT=%d DUP=%d\n" "rate=0x%X\n", @@ -2544,7 +2557,9 @@ static ssize_t rs_sta_dbgfs_stats_table_ lq_sta->lq_info[i].win[j].success_ratio); } } - return simple_read_from_buffer(user_buf, count, ppos, buff, desc); + ret = simple_read_from_buffer(user_buf, count, ppos, buff, desc); + kfree(buff); + return ret; } static const struct file_operations rs_sta_dbgfs_stats_table_ops = { -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists