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| author | Roberto Sassu <roberto.sassu@huawei.com> | 2024-03-07 13:49:26 +0300 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2024-04-22 23:15:27 +0300 |
| commit | a0fbbd36c156b9f7b2276871d499c9943dfe5101 (patch) | |
| tree | 9f4d7010b834652070a9d85b03e4ca488effa8f5 /tools/perf/scripts/python/task-analyzer.py | |
| parent | 49ff7d871242d7fd8adb8a2d8347c5d94dda808b (diff) | |
| download | linux-a0fbbd36c156b9f7b2276871d499c9943dfe5101.tar.xz | |
um: Add winch to winch_handlers before registering winch IRQ
Registering a winch IRQ is racy, an interrupt may occur before the winch is
added to the winch_handlers list.
If that happens, register_winch_irq() adds to that list a winch that is
scheduled to be (or has already been) freed, causing a panic later in
winch_cleanup().
Avoid the race by adding the winch to the winch_handlers list before
registering the IRQ, and rolling back if um_request_irq() fails.
Fixes: 42a359e31a0e ("uml: SIGIO support cleanup")
Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'tools/perf/scripts/python/task-analyzer.py')
0 files changed, 0 insertions, 0 deletions