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staging/lustre/obdclass: Proper swabbing of llog_rec_tail.

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A variable-length structure preceeds llog_rec_tail within an llog
block. Thus cr_tail shouldn't be accessed directly as a structure
member but its actual location should be computed dynamically.

Signed-off-by: Henri Doreau <henri.doreau@cea.fr>
Reviewed-on: http://review.whamcloud.com/11937
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-5631
Reviewed-by: jacques-Charles Lafoucriere <jacques-charles.lafoucriere@cea.fr>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Signed-off-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Henri Doreau 2015-02-01 21:52:09 -05:00 • committed by Greg Kroah-Hartman
parent 081fa9dffc
commit dbab2d8563
1 changed files with 4 additions and 1 deletions
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5
drivers/staging/lustre/lustre/obdclass/llog_swab.c
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@ -168,7 +168,8 @@ void lustre_swab_llog_rec(struct llog_rec_hdr *rec)
} }
case CHANGELOG_REC: case CHANGELOG_REC:
{ {
struct llog_changelog_rec *cr = (struct llog_changelog_rec *)rec; struct llog_changelog_rec *cr =
(struct llog_changelog_rec *)rec;
__swab16s(&cr->cr.cr_namelen); __swab16s(&cr->cr.cr_namelen);
__swab16s(&cr->cr.cr_flags); __swab16s(&cr->cr.cr_flags);
@ -188,6 +189,8 @@ void lustre_swab_llog_rec(struct llog_rec_hdr *rec)
} else { } else {
tail = &cr->cr_tail; tail = &cr->cr_tail;
} }
tail = (struct llog_rec_tail *)((char *)tail +
cr->cr.cr_namelen);
break; break;
} }
case CHANGELOG_USER_REC: case CHANGELOG_USER_REC: