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| author | Roberto Sassu <roberto.sassu@huawei.com> | 2024-03-07 11:49:26 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-06-16 13:23:34 +0200 |
| commit | 66ea9a7c6824821476914bed21a476cd20094f33 (patch) | |
| tree | 6660de34682e9f022a38e1be4e859330abcd17b4 /net/lapb/lapb_in.c | |
| parent | d2640251f94078e1dcf0a26b1815601f6dbd5440 (diff) | |
um: Add winch to winch_handlers before registering winch IRQ
[ Upstream commit a0fbbd36c156b9f7b2276871d499c9943dfe5101 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net/lapb/lapb_in.c')
0 files changed, 0 insertions, 0 deletions