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linux/drivers/net/ethernet/cavium
Alok Tiwari 53d20606c4 net: thunderx: Fix format-truncation warning in bgx_acpi_match_id()
The buffer bgx_sel used in snprintf() was too small to safely hold
the formatted string "BGX%d" for all valid bgx_id values. This caused
a -Wformat-truncation warning with `Werror` enabled during build.

Increase the buffer size from 5 to 7 and use `sizeof(bgx_sel)` in
snprintf() to ensure safety and suppress the warning.

Build warning:
  CC      drivers/net/ethernet/cavium/thunder/thunder_bgx.o
  drivers/net/ethernet/cavium/thunder/thunder_bgx.c: In function
‘bgx_acpi_match_id’:
  drivers/net/ethernet/cavium/thunder/thunder_bgx.c:1434:27: error: ‘%d’
directive output may be truncated writing between 1 and 3 bytes into a
region of size 2 [-Werror=format-truncation=]
    snprintf(bgx_sel, 5, "BGX%d", bgx->bgx_id);
                             ^~
  drivers/net/ethernet/cavium/thunder/thunder_bgx.c:1434:23: note:
directive argument in the range [0, 255]
    snprintf(bgx_sel, 5, "BGX%d", bgx->bgx_id);
                         ^~~~~~~
  drivers/net/ethernet/cavium/thunder/thunder_bgx.c:1434:2: note:
‘snprintf’ output between 5 and 7 bytes into a destination of size 5
    snprintf(bgx_sel, 5, "BGX%d", bgx->bgx_id);

compiler warning due to insufficient snprintf buffer size.

Signed-off-by: Alok Tiwari <alok.a.tiwari@oracle.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250711140532.2463602-1-alok.a.tiwari@oracle.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-07-14 17:16:10 -07:00
..
common ethernet: cavium: Replace deprecated PCI functions 2024-11-07 07:10:34 -06:00
liquidio net: liquidio: Remove unused validate_cn23xx_pf_config_info() 2025-06-17 16:01:33 -07:00
octeon net: ethernet: Switch back to struct platform_driver::remove() 2024-10-04 16:39:56 -07:00
thunder net: thunderx: Fix format-truncation warning in bgx_acpi_match_id() 2025-07-14 17:16:10 -07:00
Kconfig lib/crc: remove CONFIG_LIBCRC32C 2025-04-04 11:31:42 -07:00
Makefile