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| author | Axel Lin <axel.lin@gmail.com> | 2010-08-09 17:20:56 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-09 20:45:09 -0700 |
| commit | 1986aaf828ac8398b3d8d9b4151b08c840414ffe (patch) | |
| tree | ce5b6e92bab2e8f706ad2c9e08ac826bc5c215a2 | |
| parent | ea98eed9bcb62d1319db8b1210712c6a110a886c (diff) | |
| download | linux-1986aaf828ac8398b3d8d9b4151b08c840414ffe.tar.gz | |
edd: fix possible memory leak in edd_init() error path
The error may happen at any iteration of the for loop, this patch properly unregisters already registed edd_devices in error path. [akpm@linux-foundation.org: remove unneeded NULL test] Signed-off-by: Axel Lin <axel.lin@gmail.com> Cc: Stephen Hemminger <shemminger@vyatta.com> Cc: Jens Axboe <jens.axboe@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/firmware/edd.c | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/drivers/firmware/edd.c b/drivers/firmware/edd.c index 110e24e50883..f287fe79edc4 100644 --- a/drivers/firmware/edd.c +++ b/drivers/firmware/edd.c @@ -744,7 +744,7 @@ static inline int edd_num_devices(void) static int __init edd_init(void) { - unsigned int i; + int i; int rc=0; struct edd_device *edev; @@ -760,21 +760,27 @@ edd_init(void) if (!edd_kset) return -ENOMEM; - for (i = 0; i < edd_num_devices() && !rc; i++) { + for (i = 0; i < edd_num_devices(); i++) { edev = kzalloc(sizeof (*edev), GFP_KERNEL); - if (!edev) - return -ENOMEM; + if (!edev) { + rc = -ENOMEM; + goto out; + } rc = edd_device_register(edev, i); if (rc) { kfree(edev); - break; + goto out; } edd_devices[i] = edev; } - if (rc) - kset_unregister(edd_kset); + return 0; + +out: + while (--i >= 0) + edd_device_unregister(edd_devices[i]); + kset_unregister(edd_kset); return rc; } |