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test/fs: Check ext4 behaviour if dirent is first entry in directory block

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This is a regression test for a crash happening if the first dirent
in the block matches. Code tried to access a predecessor entry which
does not exist.
The crash happened for any block, but "." is always the first entry in
the first directory block and thus easy to check for.

Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
This commit is contained in:
Stefan Brüns 2016-09-14 01:01:30 +02:00 committed by Tom Rini
parent d9554b7f4b
commit 14678b3c62
1 changed files with 10 additions and 0 deletions
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10
test/fs/fs-test.sh
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@ -293,6 +293,12 @@ ${PREFIX}load host${SUFFIX} $addr ${FPATH}$FILE_WRITE
md5sum $addr \$filesize
setenv filesize
#
# Next test case checks writing a file whose dirent
# is the first in the block, which is always true for "."
# The write should fail, but the lookup should work
# Test Case 12 - Check directory traversal
${PREFIX}${WRITE} host${SUFFIX} $addr ${FPATH}. 0x10
reset
EOF
@ -472,6 +478,10 @@ function check_results() {
pass_fail "TC11: 1MB write to $3.w - write succeeded"
check_md5 "Test Case 11b " "$1" "$2" 1 \
"TC11: 1MB write to $3.w - content verified"
# Check lookup of 'dot' directory
grep -A4 "Test Case 12 " "$1" | grep -q 'Unable to write file'
pass_fail "TC12: 1MB write to . - write denied"
echo "** End $1"
}