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net: qed: use correct strncpy() size

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commit 11f711081af0eb54190dc0de96ba4a9cd494666b upstream.

passing the strlen() of the source string as the destination
length is pointless, and gcc-8 now warns about it:

drivers/net/ethernet/qlogic/qed/qed_debug.c: In function 'qed_grc_dump':
include/linux/string.h:253: error: 'strncpy' specified bound depends on the length of the source argument [-Werror=stringop-overflow=]

This changes qed_grc_dump_big_ram() to instead uses the length of
the destination buffer, and use strscpy() to guarantee nul-termination.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Arnd Bergmann 2018-02-02 16:44:47 +01:00 committed by Greg Kroah-Hartman
parent c29f9010a3
commit 02dc68829e
1 changed files with 2 additions and 4 deletions
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6
drivers/net/ethernet/qlogic/qed/qed_debug.c
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@ -3590,10 +3590,8 @@ static u32 qed_grc_dump_big_ram(struct qed_hwfn *p_hwfn,
total_blocks = big_ram->num_of_blocks[dev_data->chip_id];
ram_size = total_blocks * BIG_RAM_BLOCK_SIZE_DWORDS;
strncpy(type_name, big_ram->instance_name,
strlen(big_ram->instance_name));
strncpy(mem_name, big_ram->instance_name,
strlen(big_ram->instance_name));
strscpy(type_name, big_ram->instance_name, sizeof(type_name));
strscpy(mem_name, big_ram->instance_name, sizeof(mem_name));
/* Dump memory header */
offset += qed_grc_dump_mem_hdr(p_hwfn,