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authorColin Ian King <colin.king@canonical.com>2015-12-18 14:22:01 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-12-18 14:25:40 -0800
commit41a0c249cb8706a2efa1ab3d59466b23a27d0c8b (patch)
tree46e4739253a5199799a9f4b7daa634f4217f06ad
parentMerge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net (diff)
downloadlinux-dev-41a0c249cb8706a2efa1ab3d59466b23a27d0c8b.tar.xz
linux-dev-41a0c249cb8706a2efa1ab3d59466b23a27d0c8b.zip
proc: fix -ESRCH error when writing to /proc/$pid/coredump_filter
Writing to /proc/$pid/coredump_filter always returns -ESRCH because commit 774636e19ed51 ("proc: convert to kstrto*()/kstrto*_from_user()") removed the setting of ret after the get_proc_task call and incorrectly left it as -ESRCH. Instead, return 0 when successful. Example breakage: echo 0 > /proc/self/coredump_filter bash: echo: write error: No such process Fixes: 774636e19ed51 ("proc: convert to kstrto*()/kstrto*_from_user()") Signed-off-by: Colin Ian King <colin.king@canonical.com> Acked-by: Kees Cook <keescook@chromium.org> Cc: <stable@vger.kernel.org> [4.3+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/proc/base.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/proc/base.c b/fs/proc/base.c
index bd3e9e68125b..4bd5d3118acd 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -2494,6 +2494,7 @@ static ssize_t proc_coredump_filter_write(struct file *file,
mm = get_task_mm(task);
if (!mm)
goto out_no_mm;
+ ret = 0;
for (i = 0, mask = 1; i < MMF_DUMP_FILTER_BITS; i++, mask <<= 1) {
if (val & mask)