diff options
| author | Colin Ian King <colin.king@canonical.com> | 2019-04-12 15:13:27 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-04-12 16:55:47 -0700 |
| commit | 1dc2b3d65523780ed1972d446c76e62e13f3e8f5 (patch) | |
| tree | af01b1f03d5bfaeaa837f5a8586c000ac5cb67db /drivers | |
| parent | 0a2c34f18c94b596562bf3d019fceab998b8b584 (diff) | |
| download | linux-1dc2b3d65523780ed1972d446c76e62e13f3e8f5.tar.bz2 | |
qede: fix write to free'd pointer error and double free of ptp
The err2 error return path calls qede_ptp_disable that cleans up
on an error and frees ptp. After this, the free'd ptp is dereferenced
when ptp->clock is set to NULL and the code falls-through to error
path err1 that frees ptp again.
Fix this by calling qede_ptp_disable and exiting via an error
return path that does not set ptp->clock or kfree ptp.
Addresses-Coverity: ("Write to pointer after free")
Fixes: 035744975aec ("qede: Add support for PTP resource locking.")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/ethernet/qlogic/qede/qede_ptp.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/net/ethernet/qlogic/qede/qede_ptp.c b/drivers/net/ethernet/qlogic/qede/qede_ptp.c index 5f3f42a25361..bddb2b5982dc 100644 --- a/drivers/net/ethernet/qlogic/qede/qede_ptp.c +++ b/drivers/net/ethernet/qlogic/qede/qede_ptp.c @@ -490,18 +490,17 @@ int qede_ptp_enable(struct qede_dev *edev, bool init_tc) ptp->clock = ptp_clock_register(&ptp->clock_info, &edev->pdev->dev); if (IS_ERR(ptp->clock)) { - rc = -EINVAL; DP_ERR(edev, "PTP clock registration failed\n"); + qede_ptp_disable(edev); + rc = -EINVAL; goto err2; } return 0; -err2: - qede_ptp_disable(edev); - ptp->clock = NULL; err1: kfree(ptp); +err2: edev->ptp = NULL; return rc; |