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| author | Azeem Shaikh <azeemshaikh38@gmail.com> | 2023-07-03 17:21:58 +0000 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-07-17 08:18:17 -0600 |
| commit | 222f58ac68cd6f98a52faf9f26a219c996a5aa17 (patch) | |
| tree | d80045154d9e778be7c1a525211692abc558a5ec | |
| parent | fdf0eaf11452d72945af31804e2a1048ee1b574c (diff) | |
| download | linux-stable-222f58ac68cd6f98a52faf9f26a219c996a5aa17.tar.gz linux-stable-222f58ac68cd6f98a52faf9f26a219c996a5aa17.tar.bz2 linux-stable-222f58ac68cd6f98a52faf9f26a219c996a5aa17.zip | |
kyber: Replace strlcpy with strscpy
strlcpy() reads the entire source buffer first.
This read may exceed the destination size limit.
This is both inefficient and can lead to linear read
overflows if a source string is not NUL-terminated [1].
In an effort to remove strlcpy() completely [2], replace
strlcpy() here with strscpy().
No return values were used, so direct replacement is safe.
[1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy
[2] https://github.com/KSPP/linux/issues/89
Signed-off-by: Azeem Shaikh <azeemshaikh38@gmail.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20230703172159.3668349-2-azeemshaikh38@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | include/trace/events/kyber.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/include/trace/events/kyber.h b/include/trace/events/kyber.h index bf7533f171ff..9d44781efc1c 100644 --- a/include/trace/events/kyber.h +++ b/include/trace/events/kyber.h @@ -31,8 +31,8 @@ TRACE_EVENT(kyber_latency, TP_fast_assign( __entry->dev = dev; - strlcpy(__entry->domain, domain, sizeof(__entry->domain)); - strlcpy(__entry->type, type, sizeof(__entry->type)); + strscpy(__entry->domain, domain, sizeof(__entry->domain)); + strscpy(__entry->type, type, sizeof(__entry->type)); __entry->percentile = percentile; __entry->numerator = numerator; __entry->denominator = denominator; @@ -59,7 +59,7 @@ TRACE_EVENT(kyber_adjust, TP_fast_assign( __entry->dev = dev; - strlcpy(__entry->domain, domain, sizeof(__entry->domain)); + strscpy(__entry->domain, domain, sizeof(__entry->domain)); __entry->depth = depth; ), @@ -81,7 +81,7 @@ TRACE_EVENT(kyber_throttled, TP_fast_assign( __entry->dev = dev; - strlcpy(__entry->domain, domain, sizeof(__entry->domain)); + strscpy(__entry->domain, domain, sizeof(__entry->domain)); ), TP_printk("%d,%d %s", MAJOR(__entry->dev), MINOR(__entry->dev), |