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Message-Id: <6c8e5a486962d399fe69b693601219eb5df3fdcd.1383121137.git.ydroneaud@opteya.com> Date: Wed, 30 Oct 2013 20:47:42 +0100 From: Yann Droneaud <ydroneaud@...eya.com> To: Jeremy Kerr <jk@...abs.org>, Arnd Bergmann <arnd@...db.de>, Benjamin Herrenschmidt <benh@...nel.crashing.org>, Paul Mackerras <paulus@...ba.org> Cc: Yann Droneaud <ydroneaud@...eya.com>, linuxppc-dev@...ts.ozlabs.org, cbe-oss-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org Subject: [PATCH v4 2/7] ppc/cell: use get_unused_fd_flags(0) instead of get_unused_fd() Macro get_unused_fd() is used to allocate a file descriptor with default flags. Those default flags (0) can be "unsafe": O_CLOEXEC must be used by default to not leak file descriptor across exec(). Instead of macro get_unused_fd(), functions anon_inode_getfd() or get_unused_fd_flags() should be used with flags given by userspace. If not possible, flags should be set to O_CLOEXEC to provide userspace with a default safe behavor. In a further patch, get_unused_fd() will be removed so that new code start using anon_inode_getfd() or get_unused_fd_flags() with correct flags. This patch replaces calls to get_unused_fd() with equivalent call to get_unused_fd_flags(0) to preserve current behavor for existing code. The hard coded flag value (0) should be reviewed on a per-subsystem basis, and, if possible, set to O_CLOEXEC. Signed-off-by: Yann Droneaud <ydroneaud@...eya.com> Link: http://lkml.kernel.org/r/cover.1383121137.git.ydroneaud@opteya.com --- arch/powerpc/platforms/cell/spufs/inode.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/platforms/cell/spufs/inode.c b/arch/powerpc/platforms/cell/spufs/inode.c index 87ba7cf..51effce 100644 --- a/arch/powerpc/platforms/cell/spufs/inode.c +++ b/arch/powerpc/platforms/cell/spufs/inode.c @@ -301,7 +301,7 @@ static int spufs_context_open(struct path *path) int ret; struct file *filp; - ret = get_unused_fd(); + ret = get_unused_fd_flags(0); if (ret < 0) return ret; @@ -518,7 +518,7 @@ static int spufs_gang_open(struct path *path) int ret; struct file *filp; - ret = get_unused_fd(); + ret = get_unused_fd_flags(0); if (ret < 0) return ret; -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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