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05 April 2024, 19:05:47 UTC
Revision 0f70fe605fad0f3215818ba79fc12617c0ec7f90 authored by Horacio Mijail Anton Quiles on 17 July 2015, 23:24:04 UTC, committed by Linus Torvalds on 17 July 2015, 23:39:53 UTC 
hexdump: fix for non-aligned buffers
 
A hexdump with a buf not aligned to the groupsize causes
non-naturally-aligned memory accesses.  This was causing a kernel panic
on the processor BlackFin BF527, when such an unaligned buffer was fed
by the function ubifs_scanned_corruption in fs/ubifs/scan.c .

To fix this, change accesses to the contents of the buffer so they go
through get_unaligned().  This change should be harmless to unaligned-
access-capable architectures, and any performance hit should be anyway
dwarfed by the snprintf() processing time.

Signed-off-by: Horacio Mijail Antón Quiles <hmijail@gmail.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Joe Perches <joe@perches.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent b4749e9
History
Tip revision: 0f70fe605fad0f3215818ba79fc12617c0ec7f90 authored by Horacio Mijail Anton Quiles on 17 July 2015, 23:24:04 UTC
hexdump: fix for non-aligned buffers
Tip revision: 0f70fe6
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