linux/fs/fuse
Mateusz Jurczyk 227559e623 fuse: initialize the flock flag in fuse_file on allocation
commit 68227c03cb upstream.

Before the patch, the flock flag could remain uninitialized for the
lifespan of the fuse_file allocation. Unless set to true in
fuse_file_flock(), it would remain in an indeterminate state until read in
an if statement in fuse_release_common(). This could consequently lead to
taking an unexpected branch in the code.

The bug was discovered by a runtime instrumentation designed to detect use
of uninitialized memory in the kernel.

Signed-off-by: Mateusz Jurczyk <mjurczyk@google.com>
Fixes: 37fb3a30b4 ("fuse: fix flock")
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2017-08-16 13:43:17 -07:00
..
acl.c fuse: Add posix ACL support 2016-10-01 07:32:32 +02:00
control.c fs: Replace CURRENT_TIME with current_time() for inode timestamps 2016-09-27 21:06:21 -04:00
cuse.c fuse: Add reference counting for fuse_io_priv 2016-03-14 15:02:51 +01:00
dev.c fuse: fix uninitialized flags in pipe_buffer 2017-02-23 17:44:35 +01:00
dir.c fuse: fix time_to_jiffies nsec sanity check 2017-01-26 08:24:38 +01:00
file.c fuse: initialize the flock flag in fuse_file on allocation 2017-08-16 13:43:17 -07:00
fuse_i.h fuse: fix root dentry initialization 2016-10-18 15:36:48 +02:00
inode.c fuse: fix root dentry initialization 2016-10-18 15:36:48 +02:00
Kconfig fuse: Add posix ACL support 2016-10-01 07:32:32 +02:00
Makefile fuse: Use generic xattr ops 2016-10-01 07:32:32 +02:00
xattr.c fuse: limit xattr returned size 2016-10-03 11:06:05 +02:00