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Flash API: flash_erase has incorrect userspace handler #81777

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de-nordic opened this issue Nov 22, 2024 · 0 comments · May be fixed by #81778
Open

Flash API: flash_erase has incorrect userspace handler #81777

de-nordic opened this issue Nov 22, 2024 · 0 comments · May be fixed by #81778
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@de-nordic
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bug The issue is a bug, or the PR is fixing a bug priority: low Low impact/importance bug
Milestone
v4.1.0

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@de-nordic
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Describe the bug

Drivers have option to not implement erase, in which case pointer to erase callback may be left NULL:

zephyr/include/zephyr/drivers/flash.h

Lines 309 to 312 in c14b022

static inline int z_impl_flash_erase(const struct device *dev, off_t offset,
size_t size)
{
int rc = -ENOSYS;

But handler for the erase has been left as it is always expected:

zephyr/drivers/flash/flash_handlers.c

Line 34 in c14b022

K_OOPS(K_SYSCALL_DRIVER_FLASH(dev, erase));

Expected behavior
Proper check should be done using K_SYSCALL_OBJ, to only verify the object, ignoring whether erase callback is assigned or not.

K_OOPS(K_SYSCALL_OBJ(dev, K_OBJ_DRIVER_FLASH))

Impact
Currently only on out-of-tree drivers that do not implement erase.

Environment (please complete the following information):

  • OS: Ubuntu 20
  • Toolchain Zephyr sdk 0.17.0
  • Commit SHA c14b022

Additional context
Verification Return Value Policies
K_SYSCALL_OBJ
K_SYSCALL_DRIVER_OP

@de-nordic de-nordic added the bug The issue is a bug, or the PR is fixing a bug label Nov 22, 2024
de-nordic added a commit to de-nordic/zephyr that referenced this issue Nov 22, 2024
@de-nordic
drivers/flash: Correct flash_erase userspace handler
4b261bf 
As the erase callback is optional, handler should not check
if it is not NULL.

Fixes zephyrproject-rtos#81777

Signed-off-by: Dominik Ermel <[email protected]>
@de-nordic de-nordic self-assigned this Nov 22, 2024
@de-nordic de-nordic added this to the v4.1.0 milestone Nov 22, 2024
@de-nordic de-nordic linked a pull request Nov 22, 2024 that will close this issue
Open
@de-nordic de-nordic added the priority: low Low impact/importance bug label Nov 22, 2024
de-nordic added a commit to de-nordic/zephyr that referenced this issue Nov 22, 2024
@de-nordic
drivers/flash: Correct flash_erase userspace handler
d59648b 
As the erase callback is optional, handler should not check
if it is not NULL.

Fixes zephyrproject-rtos#81777

Signed-off-by: Dominik Ermel <[email protected]>
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bug The issue is a bug, or the PR is fixing a bug priority: low Low impact/importance bug
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v4.1.0
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drivers/flash: Correct flash_erase userspace handler de-nordic/zephyr
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