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| H A D | paravirt_types.h | f92ff8f5 Thu Sep 15 06:10:40 CDT 2022 Thomas Gleixner <tglx@linutronix.de> x86/paravirt: Ensure proper alignment
The entries in the .parainstructions sections are 8 byte aligned and the
corresponding C struct paravirt_patch_site makes the array offset 16
bytes.
Though the pushed entries are only using 12 bytes, __parainstructions_end
is therefore 4 bytes short.
That works by chance because it's only used in a loop:
for (p = start; p < end; p++)
But this falls flat when calculating the number of elements:
n = end - start
That's obviously off by one.
Ensure that the gap is filled and the last entry is occupying 16 bytes.
[ bp: Add the proper struct and section names. ]
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/20220915111142.992398801@infradead.org
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| H A D | paravirt.h | f92ff8f5 Thu Sep 15 06:10:40 CDT 2022 Thomas Gleixner <tglx@linutronix.de> x86/paravirt: Ensure proper alignment
The entries in the .parainstructions sections are 8 byte aligned and the
corresponding C struct paravirt_patch_site makes the array offset 16
bytes.
Though the pushed entries are only using 12 bytes, __parainstructions_end
is therefore 4 bytes short.
That works by chance because it's only used in a loop:
for (p = start; p < end; p++)
But this falls flat when calculating the number of elements:
n = end - start
That's obviously off by one.
Ensure that the gap is filled and the last entry is occupying 16 bytes.
[ bp: Add the proper struct and section names. ]
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lore.kernel.org/r/20220915111142.992398801@infradead.org
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