From d92cee7b374db9944b63bdd6c1784a2dd90ee9ca Mon Sep 17 00:00:00 2001 From: Guoqing Jiang Date: Mon, 18 May 2020 23:53:36 +0200 Subject: [PATCH 81/89] restripe: fix ignoring return value of read and lseek Commit: d92cee7b374db9944b63bdd6c1784a2dd90ee9ca Patch-mainline: mdadm-4.1+ References: jsc#SLE-13700 Got below error when run "make everything". restripe.c: In function test_stripes: restripe.c:870:4: error: ignoring return value of read, declared with attribute warn_unused_result [-Werror=unused-result] read(source[i], stripes[i], chunk_size); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Fix it by check the return value of read, and free memory in the failure case. And check the return value of lseek as well per Jes's comment. Signed-off-by: Guoqing Jiang Signed-off-by: Jes Sorensen Signed-off-by: Coly Li --- restripe.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/restripe.c b/restripe.c index 31b07e8..86e1d00 100644 --- a/restripe.c +++ b/restripe.c @@ -866,8 +866,16 @@ int test_stripes(int *source, unsigned long long *offsets, int disk; for (i = 0 ; i < raid_disks ; i++) { - lseek64(source[i], offsets[i]+start, 0); - read(source[i], stripes[i], chunk_size); + if ((lseek64(source[i], offsets[i]+start, 0) < 0) || + (read(source[i], stripes[i], chunk_size) != + chunk_size)) { + free(q); + free(p); + free(blocks); + free(stripes); + free(stripe_buf); + return -1; + } } for (i = 0 ; i < data_disks ; i++) { int disk = geo_map(i, start/chunk_size, raid_disks, -- 2.26.2