Lukas Czerner ebacb81273 fuse: fix use-after-free in fuse_direct_IO() ... In async IO blocking case the additional reference to the io is taken for it to survive fuse_aio_complete(). In non blocking case this additional reference is not needed, however we still reference io to figure out whether to wait for completion or not. This is wrong and will lead to use-after-free. Fix it by storing blocking information in separate variable. This was spotted by KASAN when running generic/208 fstest. Signed-off-by: Lukas Czerner <lczerner@redhat.com> Reported-by: Zorro Lang <zlang@redhat.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com> Fixes: 744742d692 ("fuse: Add reference counting for fuse_io_priv") Cc: <stable@vger.kernel.org> # v4.6		2018-11-09 15:52:17 +01:00
..
acl.c	fuse: Support fuse filesystems outside of init_user_ns	2018-03-20 17:11:44 +01:00
control.c	fuse: introduce fc->bg_lock	2018-09-28 16:43:22 +02:00
cuse.c	fuse: Support fuse filesystems outside of init_user_ns	2018-03-20 17:11:44 +01:00
dev.c	fuse: fix possibly missed wake-up after abort	2018-11-09 15:52:16 +01:00
dir.c	fuse: enable caching of symlinks	2018-10-15 15:43:07 +02:00
file.c	fuse: fix use-after-free in fuse_direct_IO()	2018-11-09 15:52:17 +01:00
fuse_i.h	fuse: enable caching of symlinks	2018-10-15 15:43:07 +02:00
inode.c	fuse: enable caching of symlinks	2018-10-15 15:43:07 +02:00
Kconfig
Makefile	fuse: split out readdir.c	2018-09-28 16:43:23 +02:00
readdir.c	fuse: use iversion for readdir cache verification	2018-10-01 10:07:05 +02:00
xattr.c	fuse: Ensure posix acls are translated outside of init_user_ns	2018-05-31 12:26:10 +02:00