On 17.05.25 18:57, Xin Li (Intel) wrote:
xen_read_msr_safe() currently passes an uninitialized argument err to
xen_do_read_msr(). But as xen_do_read_msr() may not set the argument,
xen_read_msr_safe() could return err with an unpredictable value.
To ensure correctness, initialize err to 0 (representing success)
in xen_read_msr_safe().
Do the same in xen_read_msr(), even err is not used after being passed
to xen_do_read_msr().
Fixes: d815da84fdd0 ("x86/msr: Change the function type of native_read_msr_safe()"
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Closes: https://lore.kernel.org/xen-devel/aBxNI_Q0-MhtBSZG@stanley.mountain/
Signed-off-by: Xin Li (Intel) <xin@xxxxxxxxx>
Reviewed-by: Juergen Gross <jgross@xxxxxxxx> Juergen
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