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| author | Numfor Mbiziwo-Tiapo <[email protected]> | 2021-09-23 16:18:43 +0000 |
|---|---|---|
| committer | Borislav Petkov <[email protected]> | 2021-09-24 10:37:38 +0000 |
| commit | 5ba1071f7554c4027bdbd712a146111de57918de (patch) | |
| tree | a8b9d04fc9a87bdae3e91db1d9a42e3547f4b0c0 /lib/timerqueue.c | |
| parent | x86/asm: Fix SETZ size enqcmds() build failure (diff) | |
| download | kernel-5ba1071f7554c4027bdbd712a146111de57918de.tar.gz kernel-5ba1071f7554c4027bdbd712a146111de57918de.zip | |
x86/insn, tools/x86: Fix undefined behavior due to potential unaligned accesses
Don't perform unaligned loads in __get_next() and __peek_nbyte_next() as
these are forms of undefined behavior:
"A pointer to an object or incomplete type may be converted to a pointer
to a different object or incomplete type. If the resulting pointer
is not correctly aligned for the pointed-to type, the behavior is
undefined."
(from http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1256.pdf)
These problems were identified using the undefined behavior sanitizer
(ubsan) with the tools version of the code and perf test.
[ bp: Massage commit message. ]
Signed-off-by: Numfor Mbiziwo-Tiapo <[email protected]>
Signed-off-by: Ian Rogers <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Acked-by: Masami Hiramatsu <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
Diffstat (limited to 'lib/timerqueue.c')
0 files changed, 0 insertions, 0 deletions