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Subject[PATCH] staging: lustre: lustre: obdclass: lprocfs_status.c: Fix for possible null pointer dereference
Date
There is otherwise a risk of a possible null pointer dereference.

Was largely found by using a static code analysis program called cppcheck.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
---
.../lustre/lustre/obdclass/lprocfs_status.c | 20 +++++++++-----------
1 file changed, 9 insertions(+), 11 deletions(-)

diff --git a/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c b/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
index 61e04af..4a7891a 100644
--- a/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
+++ b/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
@@ -1897,17 +1897,15 @@ int lprocfs_write_frac_u64_helper(const char *buffer, unsigned long count,
}

units = 1;
- switch (*end) {
- case 'p': case 'P':
- units <<= 10;
- case 't': case 'T':
- units <<= 10;
- case 'g': case 'G':
- units <<= 10;
- case 'm': case 'M':
- units <<= 10;
- case 'k': case 'K':
- units <<= 10;
+ if (end) {
+ switch (*end) {
+ case 'p': case 'P':
+ case 't': case 'T':
+ case 'g': case 'G':
+ case 'm': case 'M':
+ case 'k': case 'K':
+ units <<= 10;
+ }
}
/* Specified units override the multiplier */
if (units)
--
1.7.10.4


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