[SRU][J:linux-bluefield][PATCH v1 0/1] UBUNTU: SAUCE: mlxbf-bootctl: Fix kernel panic due to buffer overflow

[Asmaa Mnebhi]

BugLink: https://bugs.launchpad.net/bugs/2028309

SRU Justification:

[Impact]

Running the following LTP (linux-test-project) script, causes
a kernel panic and a reboot of the DPU:
ltp/testcases/bin/read_all -d /sys -q -r 10

The above test reads all directory and files under /sys.
Reading the sysfs entry "large_icm" causes the kernel panic
due to a garbage value returned via i2c read. That garbage
value causes a buffer overflow in sprintf.

[Fix]

* Replace sprintf with snprintf. And also add missing lock and
increase the buffer size to PAGE_SIZE.

[Test Case]

* Run from linux:
ltp/testcases/bin/read_all -d /sys -q -r 10

[Regression Potential]

* no known regression