Matthew Wilcox (Oracle) 2cd2e32fc4 ida: Fix crash in ida_free when the bitmap is empty
commit af73483f4e8b6f5c68c9aa63257bdd929a9c194a upstream.

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: Hugo SIMELIERE <hsimeliere.opensource@witekio.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 89db5346acb5a15e670c4fb3b8f3c30fa30ebc15)
[Vegard: remove changes to lib/test_ida.c which does not exist in 4.14.]
Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>
2024-10-24 10:07:41 +00:00
..
2017-08-15 09:02:08 -07:00
2017-06-09 11:52:07 +02:00
2019-04-20 09:15:07 +02:00
2017-02-24 17:46:57 -08:00
2018-02-16 20:23:04 +01:00
2020-11-05 11:06:58 +01:00
2017-08-15 09:02:07 -07:00