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misc: ocxl: fix possible refcount leak in afu_ioctl()

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[ Upstream commit c3b69ba511 ]

eventfd_ctx_put need to be called to put the refcount that gotten by
eventfd_ctx_fdget when ocxl_irq_set_handler fails.

Fixes: 0601466146 ("ocxl: move event_fd handling to frontend")
Acked-by: Frederic Barrat <fbarrat@linux.ibm.com>
Signed-off-by: Hangyu Hua <hbh25y@gmail.com>
Link: https://lore.kernel.org/r/20220824082600.36159-1-hbh25y@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Hangyu Hua
2022-08-24 16:26:00 +08:00
committed by Greg Kroah-Hartman
parent cf3bb86edd
commit 7ba19a60c7
1 changed files with 2 additions and 0 deletions
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drivers/misc/ocxl/file.c
+2
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@@ -259,6 +259,8 @@ static long afu_ioctl(struct file *file, unsigned int cmd,
if (IS_ERR(ev_ctx)) if (IS_ERR(ev_ctx))
return PTR_ERR(ev_ctx); return PTR_ERR(ev_ctx);
rc = ocxl_irq_set_handler(ctx, irq_id, irq_handler, irq_free, ev_ctx); rc = ocxl_irq_set_handler(ctx, irq_id, irq_handler, irq_free, ev_ctx);
if (rc)
eventfd_ctx_put(ev_ctx);
break; break;
case OCXL_IOCTL_GET_METADATA: case OCXL_IOCTL_GET_METADATA: