iavf: fix potential deadlock on allocation failure

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[ Upstream commit a2f054c10b ]

In iavf_adminq_task(), if kzalloc() fails to allocate the event.msg_buf,
the function will exit without releasing the adapter->crit_lock.

This is unlikely, but if it happens, the next access to that mutex will
deadlock.

Fix this by moving the unlock to the end of the function, and adding a new
label to allow jumping to the unlock portion of the function exit flow.

Fixes: fc2e6b3b13 ("iavf: Rework mutexes for better synchronisation")
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Rafal Romanowski <rafal.romanowski@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Jacob Keller 2023-07-10 13:41:27 -07:00 • committed by Greg Kroah-Hartman

parent 0ef05b8f83

commit f8d88654b5

1 changed files with 3 additions and 2 deletions

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drivers/net/ethernet/intel/iavf/iavf_main.c

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