Matthew Wilcox (Oracle) dbf8b0d938 ida: Fix crash in ida_free when the bitmap is empty ...

[ Upstream commit af73483f4e8b6f5c68c9aa63257bdd929a9c194a ]

The IDA usually detects double-frees, but that detection failed to
consider the case when there are no nearby IDs allocated and so we have a
NULL bitmap rather than simply having a clear bit.  Add some tests to the
test-suite to be sure we don't inadvertently reintroduce this problem.
Unfortunately they're quite noisy so include a message to disregard
the warnings.

Reported-by: Zhenghan Wang <wzhmmmmm@gmail.com>
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2024-01-25 14:37:38 -08:00

5.3 KiB

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