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extmod/vfs: Add finaliser to ilistdir to close directory handle.

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When iterating over filesystem/folders with os.iterdir(), an open file
(directory) handle is used internally.  Currently this file handle is only
closed once the iterator is completely drained, eg. once all entries have
been looped over / converted into list etc.

If a program opens an iterdir but does not loop over it, or starts to loop
over the iterator but breaks out of the loop, then the handle never gets
closed.  In this state, when the iter object is cleaned up by the garbage
collector this open handle can cause corruption of the filesystem.

Fixes issues #6568 and #8506.
This commit is contained in:
Andrew Leech
2022-09-09 09:48:01 +10:00
committed by Damien George
parent 582b3e4e78
commit 4e0964b59f
10 changed files with 368 additions and 6 deletions
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4
tools/ci.sh
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@@ -632,7 +632,7 @@ function ci_unix_qemu_mips_run_tests {
# - (i)listdir does not work, it always returns the empty list (it's an issue with the underlying C call)
# - ffi tests do not work
file ./ports/unix/build-coverage/micropython
(cd tests && MICROPY_MICROPYTHON=../ports/unix/build-coverage/micropython ./run-tests.py --exclude 'vfs_posix.py' --exclude 'ffi_(callback|float|float2).py')
(cd tests && MICROPY_MICROPYTHON=../ports/unix/build-coverage/micropython ./run-tests.py --exclude 'vfs_posix.*\.py' --exclude 'ffi_(callback|float|float2).py')
}
function ci_unix_qemu_arm_setup {
@@ -652,7 +652,7 @@ function ci_unix_qemu_arm_run_tests {
# - (i)listdir does not work, it always returns the empty list (it's an issue with the underlying C call)
export QEMU_LD_PREFIX=/usr/arm-linux-gnueabi
file ./ports/unix/build-coverage/micropython
(cd tests && MICROPY_MICROPYTHON=../ports/unix/build-coverage/micropython ./run-tests.py --exclude 'vfs_posix.py')
(cd tests && MICROPY_MICROPYTHON=../ports/unix/build-coverage/micropython ./run-tests.py --exclude 'vfs_posix.*\.py')
}
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