* [PATCH] net/qlcnic: Fix a use after free in qlcnic_83xx_get_minidump_template
@ 2021-03-11 4:01 Lv Yunlong
2021-03-12 2:30 ` patchwork-bot+netdevbpf
0 siblings, 1 reply; 2+ messages in thread
From: Lv Yunlong @ 2021-03-11 4:01 UTC (permalink / raw)
To: shshaikh, manishc, GR-Linux-NIC-Dev, davem, kuba
Cc: netdev, linux-kernel, Lv Yunlong
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>
---
drivers/net/ethernet/qlogic/qlcnic/qlcnic_minidump.c | 3 +++
1 file changed, 3 insertions(+)
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,
--
2.25.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] net/qlcnic: Fix a use after free in qlcnic_83xx_get_minidump_template
2021-03-11 4:01 [PATCH] net/qlcnic: Fix a use after free in qlcnic_83xx_get_minidump_template Lv Yunlong
@ 2021-03-12 2:30 ` patchwork-bot+netdevbpf
0 siblings, 0 replies; 2+ messages in thread
From: patchwork-bot+netdevbpf @ 2021-03-12 2:30 UTC (permalink / raw)
To: Lv Yunlong
Cc: shshaikh, manishc, GR-Linux-NIC-Dev, davem, kuba, netdev, linux-kernel
Hello:
This patch was applied to netdev/net.git (refs/heads/master):
On Wed, 10 Mar 2021 20:01:40 -0800 you wrote:
> 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>
> ---
> drivers/net/ethernet/qlogic/qlcnic/qlcnic_minidump.c | 3 +++
> 1 file changed, 3 insertions(+)
Here is the summary with links:
- net/qlcnic: Fix a use after free in qlcnic_83xx_get_minidump_template
https://git.kernel.org/netdev/net/c/db74623a3850
You are awesome, thank you!
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2021-03-11 4:01 [PATCH] net/qlcnic: Fix a use after free in qlcnic_83xx_get_minidump_template Lv Yunlong
2021-03-12 2:30 ` patchwork-bot+netdevbpf
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