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-Wsometimes-uninitialized in drivers/soc/qcom/pdr_interface.c #933

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nathanchance opened this issue Mar 16, 2020 · 2 comments
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-Wsometimes-uninitialized in drivers/soc/qcom/pdr_interface.c #933

nathanchance opened this issue Mar 16, 2020 · 2 comments
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-Wsometimes-uninitialized [BUG] linux-next This is an issue only seen in linux-next [FIXED][LINUX] -next This bug was only present and fixed in a -next version

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nathanchance commented Mar 16, 2020 

../drivers/soc/qcom/pdr_interface.c:316:2: warning: variable 'found' is used uninitialized whenever 'for' loop exits because its condition is false [-Wsometimes-uninitialized]
        list_for_each_entry(pds, &pdr->lookups, node) {
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../include/linux/list.h:624:7: note: expanded from macro 'list_for_each_entry'
             &pos->member != (head);                                    \
             ^~~~~~~~~~~~~~~~~~~~~~
../drivers/soc/qcom/pdr_interface.c:325:7: note: uninitialized use occurs here
        if (!found)
             ^~~~~
../drivers/soc/qcom/pdr_interface.c:316:2: note: remove the condition if it is always true
        list_for_each_entry(pds, &pdr->lookups, node) {
        ^
../include/linux/list.h:624:7: note: expanded from macro 'list_for_each_entry'
             &pos->member != (head);                                    \
             ^
../drivers/soc/qcom/pdr_interface.c:309:12: note: initialize the variable 'found' to silence this warning
        bool found;
                  ^
                   = 0
1 warning generated.

Patch submitted: https://lore.kernel.org/lkml/20200316204855.15611-1-natechancellor@gmail.com/
@nathanchance nathanchance added [PATCH] Submitted A patch has been submitted for review [BUG] linux-next This is an issue only seen in linux-next -Wsometimes-uninitialized labels Mar 16, 2020
@nathanchance nathanchance self-assigned this Mar 16, 2020
@nathanchance
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nathanchance commented Mar 16, 2020

Patch accepted: https://git.kernel.org/qcom/c/e69b3bede1b2f754a7d04383cbbc5a8b7327af79

@nathanchance nathanchance added [PATCH] Accepted A submitted patch has been accepted upstream and removed [PATCH] Submitted A patch has been submitted for review labels Mar 16, 2020
fengguang pushed a commit to 0day-ci/linux that referenced this issue Mar 17, 2020
@nathanchance @intel-lab-lkp
soc: qcom: pdr: Avoid uninitialized use of found in pdr_indication_cb
af88949 
Clang warns:

../drivers/soc/qcom/pdr_interface.c:316:2: warning: variable 'found' is
used uninitialized whenever 'for' loop exits because its condition is
false [-Wsometimes-uninitialized]
        list_for_each_entry(pds, &pdr->lookups, node) {
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../include/linux/list.h:624:7: note: expanded from macro
'list_for_each_entry'
             &pos->member != (head);
             ^~~~~~~~~~~~~~~~~~~~~~
../drivers/soc/qcom/pdr_interface.c:325:7: note: uninitialized use
occurs here
        if (!found)
             ^~~~~
../drivers/soc/qcom/pdr_interface.c:316:2: note: remove the condition if
it is always true
        list_for_each_entry(pds, &pdr->lookups, node) {
        ^
../include/linux/list.h:624:7: note: expanded from macro
'list_for_each_entry'
             &pos->member != (head);
             ^
../drivers/soc/qcom/pdr_interface.c:309:12: note: initialize the
variable 'found' to silence this warning
        bool found;
                  ^
                   = 0
1 warning generated.

Initialize found to false to fix this warning.

Fixes: fbe639b ("soc: qcom: Introduce Protection Domain Restart helpers")
Link: ClangBuiltLinux#933
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
ruscur pushed a commit to ruscur/linux that referenced this issue Mar 17, 2020
@nathanchance @andersson
soc: qcom: pdr: Avoid uninitialized use of found in pdr_indication_cb
e69b3be 
Clang warns:

../drivers/soc/qcom/pdr_interface.c:316:2: warning: variable 'found' is
used uninitialized whenever 'for' loop exits because its condition is
false [-Wsometimes-uninitialized]
        list_for_each_entry(pds, &pdr->lookups, node) {
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../include/linux/list.h:624:7: note: expanded from macro
'list_for_each_entry'
             &pos->member != (head);
             ^~~~~~~~~~~~~~~~~~~~~~
../drivers/soc/qcom/pdr_interface.c:325:7: note: uninitialized use
occurs here
        if (!found)
             ^~~~~
../drivers/soc/qcom/pdr_interface.c:316:2: note: remove the condition if
it is always true
        list_for_each_entry(pds, &pdr->lookups, node) {
        ^
../include/linux/list.h:624:7: note: expanded from macro
'list_for_each_entry'
             &pos->member != (head);
             ^
../drivers/soc/qcom/pdr_interface.c:309:12: note: initialize the
variable 'found' to silence this warning
        bool found;
                  ^
                   = 0
1 warning generated.

Initialize found to false to fix this warning.

Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Fixes: fbe639b ("soc: qcom: Introduce Protection Domain Restart helpers")
Link: ClangBuiltLinux#933
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Link: https://lore.kernel.org/r/20200316204855.15611-1-natechancellor@gmail.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
@nathanchance
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nathanchance commented Mar 17, 2020

Fixed: https://git.kernel.org/next/linux-next/c/e69b3bede1b2f754a7d04383cbbc5a8b7327af79

@nathanchance nathanchance added [FIXED][LINUX] -next This bug was only present and fixed in a -next version and removed [PATCH] Accepted A submitted patch has been accepted upstream labels Mar 17, 2020
Divyanshu-Modi pushed a commit to Atom-X-Devs/android_kernel_xiaomi_sm7325 that referenced this issue Jul 30, 2022
@nathanchance @Divyanshu-Modi
soc: qcom: pdr: Avoid uninitialized use of found in pdr_indication_cb
cea473e 
Clang warns:

../drivers/soc/qcom/pdr_interface.c:316:2: warning: variable 'found' is
used uninitialized whenever 'for' loop exits because its condition is
false [-Wsometimes-uninitialized]
        list_for_each_entry(pds, &pdr->lookups, node) {
        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../include/linux/list.h:624:7: note: expanded from macro
'list_for_each_entry'
             &pos->member != (head);
             ^~~~~~~~~~~~~~~~~~~~~~
../drivers/soc/qcom/pdr_interface.c:325:7: note: uninitialized use
occurs here
        if (!found)
             ^~~~~
../drivers/soc/qcom/pdr_interface.c:316:2: note: remove the condition if
it is always true
        list_for_each_entry(pds, &pdr->lookups, node) {
        ^
../include/linux/list.h:624:7: note: expanded from macro
'list_for_each_entry'
             &pos->member != (head);
             ^
../drivers/soc/qcom/pdr_interface.c:309:12: note: initialize the
variable 'found' to silence this warning
        bool found;
                  ^
                   = 0
1 warning generated.

Initialize found to false to fix this warning.

Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Fixes: fbe639b ("soc: qcom: Introduce Protection Domain Restart helpers")
Link: ClangBuiltLinux/linux#933
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Link: https://lore.kernel.org/r/20200316204855.15611-1-natechancellor@gmail.com
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Divyanshu-Modi <divyan.m05@gmail.com>
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