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authorPádraig Brady <P@draigBrady.com>2016-04-20 14:03:05 +0100
committerPádraig Brady <P@draigBrady.com>2016-04-21 19:34:18 +0100
commitff6cc22d062c493c9fee27cfe1d2e6328d502a43 (patch)
treedf43a7f32e55778478f5b3833373066c8469b0e0 /tests/dd
parent163c70d970ca3e216e24970fc5ebb1b48fdb855e (diff)
downloadcoreutils-ff6cc22d062c493c9fee27cfe1d2e6328d502a43.tar.xz
tests: avoid potential overflows with `expr`
* cfg.mk (sc_prohibit_expr_unsigned): expr uses intmax_t internally when GMP is not available, so flag any uses of unsigned limits. * tests/misc/timeout-parameters.sh: Remove the overflow related to UINT_MAX as it's handled by the following case. Change the following case from 99... to $TIME_T_OFLOW to be more expressive in what it's actually testing. Directly check that commands succeed, rather than inspecting $? afterwards. * tests/dd/skip-seek-past-dev.sh: Guard against large device sizes. * tests/id/setgid.sh: Protect: Guard against large group IDs. * tests/misc/cut-huge-range.sh: Tweak comment to avoid syntax check. It's tempting to simplify to just skip the test if expr fails, but SIZE_MAX > INTMAX_MAX is the common case.
Diffstat (limited to 'tests/dd')
-rwxr-xr-xtests/dd/skip-seek-past-dev.sh3
1 files changed, 2 insertions, 1 deletions
diff --git a/tests/dd/skip-seek-past-dev.sh b/tests/dd/skip-seek-past-dev.sh
index c24bbb79c..2174985a7 100755
--- a/tests/dd/skip-seek-past-dev.sh
+++ b/tests/dd/skip-seek-past-dev.sh
@@ -39,7 +39,8 @@ dev_size=$(get_device_size "$device") ||
skip_ "failed to determine size of $device"
# Don't use shell arithmetic as older versions of dash use longs
-DEV_OFLOW=$(expr $dev_size + 1)
+DEV_OFLOW=$(expr $dev_size + 1) ||
+ skip_ "failed to adjust device size $dev_size"
timeout 10 dd bs=1 skip=$DEV_OFLOW count=0 status=noxfer < "$device" 2> err
test "$?" = "1" || fail=1