From: Quentin Bouget <quentin.bouget.ocre@xxxxxx> Fixes potential deadlock in LNetMDAttach Signed-off-by: Quentin Bouget <quentin.bouget.ocre@xxxxxx> Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-8249 Reviewed-on: http://review.whamcloud.com/20676 Reviewed-by: Doug Oucharek <doug.s.oucharek@xxxxxxxxx> Reviewed-by: James Simmons <uja.ornl@xxxxxxxxx> Reviewed-by: Henri Doreau <henri.doreau@xxxxxx> Reviewed-by: Oleg Drokin <oleg.drokin@xxxxxxxxx> Signed-off-by: James Simmons <jsimmons@xxxxxxxxxxxxx> --- drivers/staging/lustre/lnet/lnet/lib-md.c | 24 +++++++++++++----------- 1 files changed, 13 insertions(+), 11 deletions(-) diff --git a/drivers/staging/lustre/lnet/lnet/lib-md.c b/drivers/staging/lustre/lnet/lnet/lib-md.c index e0b2f16..eab53cd 100644 --- a/drivers/staging/lustre/lnet/lnet/lib-md.c +++ b/drivers/staging/lustre/lnet/lnet/lib-md.c @@ -292,11 +292,12 @@ LNetMDAttach(lnet_handle_me_t meh, lnet_md_t umd, return -ENOMEM; rc = lnet_md_build(md, &umd, unlink); + if (rc) + goto out_free; + cpt = lnet_cpt_of_cookie(meh.cookie); lnet_res_lock(cpt); - if (rc) - goto failed; me = lnet_handle2me(&meh); if (!me) @@ -307,7 +308,7 @@ LNetMDAttach(lnet_handle_me_t meh, lnet_md_t umd, rc = lnet_md_link(md, umd.eq_handle, cpt); if (rc) - goto failed; + goto out_unlock; /* * attach this MD to portal of ME and check if it matches any @@ -324,10 +325,10 @@ LNetMDAttach(lnet_handle_me_t meh, lnet_md_t umd, return 0; - failed: - lnet_md_free(md); - +out_unlock: lnet_res_unlock(cpt); +out_free: + lnet_md_free(md); return rc; } EXPORT_SYMBOL(LNetMDAttach); @@ -370,24 +371,25 @@ LNetMDBind(lnet_md_t umd, lnet_unlink_t unlink, lnet_handle_md_t *handle) return -ENOMEM; rc = lnet_md_build(md, &umd, unlink); + if (rc) + goto out_free; cpt = lnet_res_lock_current(); - if (rc) - goto failed; rc = lnet_md_link(md, umd.eq_handle, cpt); if (rc) - goto failed; + goto out_unlock; lnet_md2handle(handle, md); lnet_res_unlock(cpt); return 0; - failed: +out_unlock: + lnet_res_unlock(cpt); +out_free: lnet_md_free(md); - lnet_res_unlock(cpt); return rc; } EXPORT_SYMBOL(LNetMDBind); -- 1.7.1 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
