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authorAnatol Pomozov <anatol.pomozov@gmail.com>2012-09-12 20:11:55 -0700
committerAl Viro <viro@zeniv.linux.org.uk>2013-02-22 23:31:32 -0500
commit39b652527457452f09b35044fb4f8b3b0eabafdf (patch)
treeacd8fda1d4e37c58c68fe0cfb9288d5d06e14441 /ipc
parent1afc99beaf0fca3767d9b67789a7ae91c4f7a9c9 (diff)
downloadlinux-39b652527457452f09b35044fb4f8b3b0eabafdf.tar.gz
fs: Preserve error code in get_empty_filp(), part 2
Allocating a file structure in function get_empty_filp() might fail because of several reasons: - not enough memory for file structures - operation is not allowed - user is over its limit Currently the function returns NULL in all cases and we loose the exact reason of the error. All callers of get_empty_filp() assume that the function can fail with ENFILE only. Return error through pointer. Change all callers to preserve this error code. [AV: cleaned up a bit, carved the get_empty_filp() part out into a separate commit (things remaining here deal with alloc_file()), removed pipe(2) behaviour change] Signed-off-by: Anatol Pomozov <anatol.pomozov@gmail.com> Reviewed-by: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'ipc')
-rw-r--r--ipc/shm.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/ipc/shm.c b/ipc/shm.c
index 8c9402d298a..de389e639e7 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -1042,7 +1042,8 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg, ulong *raddr,
is_file_hugepages(shp->shm_file) ?
&shm_file_operations_huge :
&shm_file_operations);
- if (!file)
+ err = PTR_ERR(file);
+ if (IS_ERR(file))
goto out_free;
file->private_data = sfd;