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| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2026-06-09 23:05:42 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2026-06-11 13:52:09 -0700 |
| commit | ed0428e92812b5d4e9d5c4cbcab9a4f107137dfc (patch) | |
| tree | 86439fb58498a32fd260dfea6751ea933235e39c /rust/kernel/drm/gpuvm/git@git.tavy.me:linux-stable.git | |
| parent | 6251f7d3472c0409e30f8d6a24f10d33d12e3f9a (diff) | |
Input: ipaq-micro-keys - fix potential deadlock
The driver acquires the micro->lock spinlock in process context (in
micro_key_start() and micro_key_stop()) without disabling interrupts.
However, this lock is also acquired in hardirq context by the MFD core
rx handler (micro_rx_msg()) which is called from the serial ISR.
This can lead to a lock inversion deadlock if the interrupt fires on the
same CPU while the process context holds the lock.
Fix this by using guard(spinlock_irq) instead of guard(spinlock) in
micro_key_start() and micro_key_stop() to disable interrupts while
holding the lock.
Reported-by: sashiko-bot@kernel.org
Assisted-by: Antigravity:gemini-3.5-flash
Link: https://patch.msgid.link/aij-pfaKK-Nna7wf@google.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'rust/kernel/drm/gpuvm/git@git.tavy.me:linux-stable.git')
0 files changed, 0 insertions, 0 deletions