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Message-Id: <1419201831-13878-1-git-send-email-rickard_strandqvist@spectrumdigital.se> Date: Sun, 21 Dec 2014 23:43:51 +0100 From: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se> To: Oleg Drokin <oleg.drokin@...el.com>, Andreas Dilger <andreas.dilger@...el.com> Cc: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, HPDD-discuss@...ts.01.org, devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org Subject: [PATCH] staging: lustre: lustre: include: lustre_update.h: Fix for possible null pointer dereference The NULL check was done to late, and there it was a risk of a possible null pointer dereference. This was partially found by using a static code analysis program called cppcheck. Signed-off-by: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se> --- drivers/staging/lustre/lustre/include/lustre_update.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/staging/lustre/lustre/include/lustre_update.h b/drivers/staging/lustre/lustre/include/lustre_update.h index 84defce..00e1361 100644 --- a/drivers/staging/lustre/lustre/include/lustre_update.h +++ b/drivers/staging/lustre/lustre/include/lustre_update.h @@ -165,12 +165,14 @@ static inline int update_get_reply_buf(struct update_reply *reply, void **buf, int result; ptr = update_get_buf_internal(reply, index, &size); + + LASSERT((ptr != NULL && size >= sizeof(int))); + result = *(int *)ptr; if (result < 0) return result; - LASSERT((ptr != NULL && size >= sizeof(int))); *buf = ptr + sizeof(int); return size - sizeof(int); } -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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