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s390/pai: fix attr_event_free upper limit for pai device drivers

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[ Upstream commit 225d09d6e5f3870560665a1829d2db79330b4c58 ]

When the device drivers are initialized, a sysfs directory
is created. This contains many attributes which are allocated with
kzalloc(). Should it fail, the memory for the attributes already
created is freed in attr_event_free(). Its second parameter is number
of attribute elements to delete. This parameter is off by one.
When i. e. the 10th attribute fails to get created, attributes
numbered 0 to 9 should be deleted. Currently only attributes
numbered 0 to 8 are deleted.

Fixes: 39d62336f5 ("s390/pai: add support for cryptography counters")
Reported-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
Signed-off-by: Thomas Richter <tmricht@linux.ibm.com>
Acked-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Thomas Richter
2024-01-18 13:03:39 +01:00
committed by Sasha Levin
parent 437af288ec
commit 8a2f812b4b
2 changed files with 2 additions and 2 deletions
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2
arch/s390/kernel/perf_pai_crypto.c
View File

@@ -647,7 +647,7 @@ static int __init attr_event_init(void)
for (i = 0; i < ARRAY_SIZE(paicrypt_ctrnames); i++) { for (i = 0; i < ARRAY_SIZE(paicrypt_ctrnames); i++) {
ret = attr_event_init_one(attrs, i); ret = attr_event_init_one(attrs, i);
if (ret) { if (ret) {
attr_event_free(attrs, i - 1); attr_event_free(attrs, i);
return ret; return ret;
} }
} }

2
arch/s390/kernel/perf_pai_ext.c
View File

@@ -612,7 +612,7 @@ static int __init attr_event_init(void)
for (i = 0; i < ARRAY_SIZE(paiext_ctrnames); i++) { for (i = 0; i < ARRAY_SIZE(paiext_ctrnames); i++) {
ret = attr_event_init_one(attrs, i); ret = attr_event_init_one(attrs, i);
if (ret) { if (ret) {
attr_event_free(attrs, i - 1); attr_event_free(attrs, i);
return ret; return ret;
} }
} }