diff options
| author | Christophe JAILLET <christophe.jaillet@wanadoo.fr> | 2022-04-21 09:13:38 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-06-09 11:30:36 +0300 |
| commit | c308a2e711a52a47f4b45e7add2b5200169e429a (patch) | |
| tree | 63a2c5e048662affeba2c796fb1680ddc9a2d8c0 | |
| parent | 53a732620acc56b282138cf3bb1224d81b25af77 (diff) | |
| download | linux-c308a2e711a52a47f4b45e7add2b5200169e429a.tar.xz | |
dmaengine: idxd: Fix the error handling path in idxd_cdev_register()
[ Upstream commit aab08c1aac01097815fbcf10fce7021d2396a31f ]
If a call to alloc_chrdev_region() fails, the already allocated resources
are leaking.
Add the needed error handling path to fix the leak.
Fixes: 42d279f9137a ("dmaengine: idxd: add char driver to expose submission portal to userland")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/1b5033dcc87b5f2a953c413f0306e883e6114542.1650521591.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/dma/idxd/cdev.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/dma/idxd/cdev.c b/drivers/dma/idxd/cdev.c index b9b2b4a4124e..033df43db0ce 100644 --- a/drivers/dma/idxd/cdev.c +++ b/drivers/dma/idxd/cdev.c @@ -369,10 +369,16 @@ int idxd_cdev_register(void) rc = alloc_chrdev_region(&ictx[i].devt, 0, MINORMASK, ictx[i].name); if (rc) - return rc; + goto err_free_chrdev_region; } return 0; + +err_free_chrdev_region: + for (i--; i >= 0; i--) + unregister_chrdev_region(ictx[i].devt, MINORMASK); + + return rc; } void idxd_cdev_remove(void) |