A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-30 03:27:44 -04:00
Code Issues Projects Releases Packages Wiki Activity

qlge: avoid memcpy buffer overflow

Browse source 
gcc-8.0.0 (snapshot) points out that we copy a variable-length string
into a fixed length field using memcpy() with the destination length,
and that ends up copying whatever follows the string:

    inlined from 'ql_core_dump' at drivers/net/ethernet/qlogic/qlge/qlge_dbg.c:1106:2:
drivers/net/ethernet/qlogic/qlge/qlge_dbg.c:708:2: error: 'memcpy' reading 15 bytes from a region of size 14 [-Werror=stringop-overflow=]
  memcpy(seg_hdr->description, desc, (sizeof(seg_hdr->description)) - 1);

Changing it to use strncpy() will instead zero-pad the destination,
which seems to be the right thing to do here.

The bug is probably harmless, but it seems like a good idea to address
it in stable kernels as well, if only for the purpose of building with
gcc-8 without warnings.

Fixes: a61f802613 ("qlge: Add ethtool register dump function.")
Signed-off-by: Arnd Bergmann <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Arnd Bergmann 2017-08-23 15:59:49 +02:00 • committed by David S. Miller
commit e58f95831e
1 changed files with 1 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

2
drivers/net/ethernet/qlogic/qlge/qlge_dbg.c
View file

@ -724,7 +724,7 @@ static void ql_build_coredump_seg_header(
seg_hdr->cookie = MPI_COREDUMP_COOKIE;
seg_hdr->segNum = seg_number;
seg_hdr->segSize = seg_size;
memcpy(seg_hdr->description, desc, (sizeof(seg_hdr->description)) - 1);
strncpy(seg_hdr->description, desc, (sizeof(seg_hdr->description)) - 1);
}
/*