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| author | Shaurya Rane <ssrane_b23@ee.vjti.ac.in> | 2025-08-25 01:43:32 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-12-03 12:45:13 +0100 |
| commit | d6af7fce2e162ac68e85d3a11eb6ac8c35b24b64 (patch) | |
| tree | a5359f85f719f52f103692ba51b7e2d6a415c809 /scripts/diffconfig | |
| parent | 19cce65709a8a2966203653028d9004e28e85bd5 (diff) | |
jfs: fix uninitialized waitqueue in transaction manager
[ Upstream commit 300b072df72694ea330c4c673c035253e07827b8 ]
The transaction manager initialization in txInit() was not properly
initializing TxBlock[0].waitor waitqueue, causing a crash when
txEnd(0) is called on read-only filesystems.
When a filesystem is mounted read-only, txBegin() returns tid=0 to
indicate no transaction. However, txEnd(0) still gets called and
tries to access TxBlock[0].waitor via tid_to_tblock(0), but this
waitqueue was never initialized because the initialization loop
started at index 1 instead of 0.
This causes a 'non-static key' lockdep warning and system crash:
INFO: trying to register non-static key in txEnd
Fix by ensuring all transaction blocks including TxBlock[0] have
their waitqueues properly initialized during txInit().
Reported-by: syzbot+c4f3462d8b2ad7977bea@syzkaller.appspotmail.com
Signed-off-by: Shaurya Rane <ssrane_b23@ee.vjti.ac.in>
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'scripts/diffconfig')
0 files changed, 0 insertions, 0 deletions