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authorKees Cook <keescook@chromium.org>2022-01-18 10:20:03 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2022-01-22 13:32:48 +0100
commita6501e4b380faee6bbf41bb2f833977c7ac6491a (patch)
treeb54c967ae299768de68c360399469fdda2c36b5b /drivers/misc/eeprom
parentc2c94b3b187dc92b2002809f489e0f24a41e91bc (diff)
eeprom: at25: Restore missing allocation
The at25 driver regressed in v5.17-rc1 due to a broken conflict resolution: the allocation of the object was accidentally removed. Restore it. This was found when building under CONFIG_FORTIFY_SOURCE=y and -Warray-bounds, which complained about strncpy() being used against an empty object: In function 'strncpy', inlined from 'at25_fw_to_chip.constprop' at drivers/misc/eeprom/at25.c:312:2: ./include/linux/fortify-string.h:48:33: warning: '__builtin_strncpy' offset [0, 9] is out of the bounds [0, 0] [-Warray-bounds] 48 | #define __underlying_strncpy __builtin_strncpy | ^ ./include/linux/fortify-string.h:59:16: note: in expansion of macro '__underlying_strncpy' 59 | return __underlying_strncpy(p, q, size); | ^~~~~~~~~~~~~~~~~~~~ In function 'strncpy', inlined from 'at25_fram_to_chip' at drivers/misc/eeprom/at25.c:373:2, inlined from 'at25_probe' at drivers/misc/eeprom/at25.c:453:10: ./include/linux/fortify-string.h:48:33: warning: '__builtin_strncpy' offset [0, 9] is out of the bounds [0, 0] [-Warray-bounds] 48 | #define __underlying_strncpy __builtin_strncpy | ^ ./include/linux/fortify-string.h:59:16: note: in expansion of macro '__underlying_strncpy' 59 | return __underlying_strncpy(p, q, size); | ^~~~~~~~~~~~~~~~~~~~ Link: https://lore.kernel.org/lkml/CAHp75VdqK7h63fz-cPaQ2MGaVdaR2f1Fb5kKCZidUG3RwLsAVA@mail.gmail.com/ Fixes: af40d16042d6 ("Merge v5.15-rc5 into char-misc-next") Cc: Arnd Bergmann <arnd@arndb.de> Cc: Jiri Prchal <jiri.prchal@aksignal.cz> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20220118182003.3385019-1-keescook@chromium.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/eeprom')
-rw-r--r--drivers/misc/eeprom/at25.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/misc/eeprom/at25.c b/drivers/misc/eeprom/at25.c
index c3305bdda69c..bee727ed98db 100644
--- a/drivers/misc/eeprom/at25.c
+++ b/drivers/misc/eeprom/at25.c
@@ -440,6 +440,10 @@ static int at25_probe(struct spi_device *spi)
return -ENXIO;
}
+ at25 = devm_kzalloc(&spi->dev, sizeof(*at25), GFP_KERNEL);
+ if (!at25)
+ return -ENOMEM;
+
mutex_init(&at25->lock);
at25->spi = spi;
spi_set_drvdata(spi, at25);