[PATCH] memory: fix segfault on rte_mem_virt2memseg() call with invalid addr

[PATCH] memory: fix segfault on rte_mem_virt2memseg() call with invalid addr

[Dariusz Stojaczyk]

When trying to use it with an address that's not
managed by DPDK it would segfault due to a missing
check. The doc says this function returns either
a pointer or NULL, so let it do so.

Change-Id: Ib292f148914e67054f5d7b664077f19cba7000e4
Signed-off-by: Dariusz Stojaczyk <dariuszx.stojaczyk@intel.com>
---
 lib/librte_eal/common/eal_common_memory.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/librte_eal/common/eal_common_memory.c b/lib/librte_eal/common/eal_common_memory.c
index 4f0688f..ecc5bb2 100644
--- a/lib/librte_eal/common/eal_common_memory.c
+++ b/lib/librte_eal/common/eal_common_memory.c
@@ -536,6 +536,9 @@ virt2memseg(const void *addr, const struct rte_memseg_list *msl)
 	void *start, *end;
 	int ms_idx;
 
+	if (msl == NULL)
+		return NULL;
+
 	/* a memseg list was specified, check if it's the right one */
 	start = msl->base_va;
 	end = RTE_PTR_ADD(start, (size_t)msl->page_sz * msl->memseg_arr.len);
-- 
2.7.4

Re: [PATCH] memory: fix segfault on rte_mem_virt2memseg() call with invalid addr

[Burakov, Anatoly]

On 01-Jun-18 2:22 PM, Dariusz Stojaczyk wrote:
> When trying to use it with an address that's not
> managed by DPDK it would segfault due to a missing
> check. The doc says this function returns either
> a pointer or NULL, so let it do so.
> 
> Change-Id: Ib292f148914e67054f5d7b664077f19cba7000e4
> Signed-off-by: Dariusz Stojaczyk <dariuszx.stojaczyk@intel.com>
> ---

Generally speaking, if the commit is a bugfix, reference to the original 
commit that introduces the issue should be part of the commit message. 
See DPDK contribution guidelines [1] and "git fixline" [2].

[1] http://dpdk.org/doc/guides/contributing/patches.html
[2] http://dpdk.org/dev

Change-Id: is probably a leftover from Gerrit, this shouldn't be part of 
the commit message.

On the substance of the patch itself:

Acked-by: Anatoly Burakov <anatoly.burakov@intel.com>

-- 
Thanks,
Anatoly

[PATCH v2] memory: fix segfault on rte_mem_virt2memseg() call with invalid addr

[Dariusz Stojaczyk]

When trying to use it with an address that's not
managed by DPDK it would segfault due to a missing
check. The doc says this function returns either
a pointer or NULL, so let it do so.

Changes from v1:
 * removed gerrit change id
 * added "git fixline" tags

Fixes: 66cc45e293ed ("mem: replace memseg with memseg lists")
Cc: anatoly.burakov@intel.com
Cc: stable@dpdk.org

Signed-off-by: Dariusz Stojaczyk <dariuszx.stojaczyk@intel.com>
---
 lib/librte_eal/common/eal_common_memory.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/librte_eal/common/eal_common_memory.c b/lib/librte_eal/common/eal_common_memory.c
index 4f0688f..ecc5bb2 100644
--- a/lib/librte_eal/common/eal_common_memory.c
+++ b/lib/librte_eal/common/eal_common_memory.c
@@ -536,6 +536,9 @@ virt2memseg(const void *addr, const struct rte_memseg_list *msl)
 	void *start, *end;
 	int ms_idx;
 
+	if (msl == NULL)
+		return NULL;
+
 	/* a memseg list was specified, check if it's the right one */
 	start = msl->base_va;
 	end = RTE_PTR_ADD(start, (size_t)msl->page_sz * msl->memseg_arr.len);
-- 
2.7.4

Re: [PATCH v2] memory: fix segfault on rte_mem_virt2memseg() call with invalid addr

[Burakov, Anatoly]

On 01-Jun-18 2:44 PM, Dariusz Stojaczyk wrote:
> When trying to use it with an address that's not
> managed by DPDK it would segfault due to a missing
> check. The doc says this function returns either
> a pointer or NULL, so let it do so.
> 
> Changes from v1:
>   * removed gerrit change id
>   * added "git fixline" tags
> 
> Fixes: 66cc45e293ed ("mem: replace memseg with memseg lists")
> Cc: anatoly.burakov@intel.com
> Cc: stable@dpdk.org
> 
> Signed-off-by: Dariusz Stojaczyk <dariuszx.stojaczyk@intel.com>
> ---

Please include Acks (Reviews, Tests...) in the commit message if they 
were given for the previous version of the patchset. Also do not list 
changes you've made in the commit message; instead, list changes in the 
patch notes, after the first "---", like so:

area: fix blah

This patch fixes this and that.

Fixes: 123456 ("area: a buggy commit")
Cc: bug.author@example.com

Signed-off-by: Fix Author <fix.author@example.com>
Acked-by: fix.reviewer@example.com

---

v2:
- Fixed this
- Fixed that

-- 
Thanks,
Anatoly

[PATCH v3] memory: fix segfault on rte_mem_virt2memseg() call with invalid addr

[Dariusz Stojaczyk]

When trying to use it with an address that's not
managed by DPDK it would segfault due to a missing
check. The doc says this function returns either
a pointer or NULL, so let it do so.

Fixes: 66cc45e293ed ("mem: replace memseg with memseg lists")
Cc: anatoly.burakov@intel.com
Cc: stable@dpdk.org

Signed-off-by: Dariusz Stojaczyk <dariuszx.stojaczyk@intel.com>
Acked-by: Anatoly Burakov <anatoly.burakov@intel.com>
---
Changes from v2:
 * cleaned up commit msg

Changes from v1:
 * removed gerrit change id
 * added "git fixline" tags

 lib/librte_eal/common/eal_common_memory.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/librte_eal/common/eal_common_memory.c b/lib/librte_eal/common/eal_common_memory.c
index 4f0688f..ecc5bb2 100644
--- a/lib/librte_eal/common/eal_common_memory.c
+++ b/lib/librte_eal/common/eal_common_memory.c
@@ -536,6 +536,9 @@ virt2memseg(const void *addr, const struct rte_memseg_list *msl)
 	void *start, *end;
 	int ms_idx;
 
+	if (msl == NULL)
+		return NULL;
+
 	/* a memseg list was specified, check if it's the right one */
 	start = msl->base_va;
 	end = RTE_PTR_ADD(start, (size_t)msl->page_sz * msl->memseg_arr.len);
-- 
2.7.4

Re: [dpdk-stable] [PATCH v3] memory: fix segfault on rte_mem_virt2memseg() call with invalid addr

[Thomas Monjalon]

04/06/2018 07:33, Dariusz Stojaczyk:
> When trying to use it with an address that's not
> managed by DPDK it would segfault due to a missing
> check. The doc says this function returns either
> a pointer or NULL, so let it do so.
> 
> Fixes: 66cc45e293ed ("mem: replace memseg with memseg lists")
> Cc: anatoly.burakov@intel.com
> Cc: stable@dpdk.org
> 
> Signed-off-by: Dariusz Stojaczyk <dariuszx.stojaczyk@intel.com>
> Acked-by: Anatoly Burakov <anatoly.burakov@intel.com>

Applied, thanks