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ath5k: fix memory leak on buf on failed eeprom read

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[ Upstream commit 8fed6823e06e43ee9cf7c0ffecec2f9111ce6201 ]

The AR5K_EEPROM_READ macro returns with -EIO if a read error
occurs causing a memory leak on the allocated buffer buf. Fix
this by explicitly calling ath5k_hw_nvram_read and exiting on
the via the freebuf label that performs the necessary free'ing
of buf when a read error occurs.

Detected by CoverityScan, CID#1248782 ("Resource Leak")

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Colin Ian King 2017-05-03 15:26:00 +01:00 committed by Greg Kroah-Hartman
parent aebd78d5fd
commit 39687738a9
1 changed files with 4 additions and 1 deletions
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5
drivers/net/wireless/ath/ath5k/debug.c
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@ -939,7 +939,10 @@ static int open_file_eeprom(struct inode *inode, struct file *file)
}
for (i = 0; i < eesize; ++i) {
AR5K_EEPROM_READ(i, val);
if (!ath5k_hw_nvram_read(ah, i, &val)) {
ret = -EIO;
goto freebuf;
}
buf[i] = val;
}