diff options
| author | Lv Yunlong <lyl2019@mail.ustc.edu.cn> | 2021-03-11 05:01:40 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-03-12 03:08:14 +0100 |
| commit | db74623a3850db99cb9692fda9e836a56b74198d (patch) | |
| tree | dea5167a4858fbbd861e8448bdacd7833d2b6bb2 | |
| parent | Merge branch '1GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/ne... (diff) | |
| download | linux-db74623a3850db99cb9692fda9e836a56b74198d.tar.xz linux-db74623a3850db99cb9692fda9e836a56b74198d.zip | |
net/qlcnic: Fix a use after free in qlcnic_83xx_get_minidump_template
In qlcnic_83xx_get_minidump_template, fw_dump->tmpl_hdr was freed by
vfree(). But unfortunately, it is used when extended is true.
Fixes: 7061b2bdd620e ("qlogic: Deletion of unnecessary checks before two function calls")
Signed-off-by: Lv Yunlong <lyl2019@mail.ustc.edu.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/ethernet/qlogic/qlcnic/qlcnic_minidump.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_minidump.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_minidump.c index 7760a3394e93..7ecb3dfe30bd 100644 --- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_minidump.c +++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_minidump.c @@ -1425,6 +1425,7 @@ void qlcnic_83xx_get_minidump_template(struct qlcnic_adapter *adapter) if (fw_dump->tmpl_hdr == NULL || current_version > prev_version) { vfree(fw_dump->tmpl_hdr); + fw_dump->tmpl_hdr = NULL; if (qlcnic_83xx_md_check_extended_dump_capability(adapter)) extended = !qlcnic_83xx_extend_md_capab(adapter); @@ -1443,6 +1444,8 @@ void qlcnic_83xx_get_minidump_template(struct qlcnic_adapter *adapter) struct qlcnic_83xx_dump_template_hdr *hdr; hdr = fw_dump->tmpl_hdr; + if (!hdr) + return; hdr->drv_cap_mask = 0x1f; fw_dump->cap_mask = 0x1f; dev_info(&pdev->dev, |