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Message-Id: <195ea19bd9d5fc1ed629dfcca9af9a8382d31cf1.1394532336.git.ydroneaud@opteya.com> Date: Tue, 11 Mar 2014 11:23:40 +0100 From: Yann Droneaud <ydroneaud@...eya.com> To: Tony Luck <tony.luck@...el.com>, Fenghua Yu <fenghua.yu@...el.com> Cc: Yann Droneaud <ydroneaud@...eya.com>, linux-ia64@...r.kernel.org, linux-kernel@...r.kernel.org, Al Viro <viro@...iv.linux.org.uk>, Andrew Morton <akpm@...ux-foundation.org> Subject: [PATCHv6 1/6] ia64: 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(), function get_unused_fd_flags() (or anon_inode_getfd()) 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 get_unused_fd_flags() (or anon_inode_getfd()) 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. Link: http://lkml.kernel.org/r/cover.1394532336.git.ydroneaud@opteya.com Cc: Al Viro <viro@...iv.linux.org.uk> Cc: Andrew Morton <akpm@...ux-foundation.org> Signed-off-by: Yann Droneaud <ydroneaud@...eya.com> --- arch/ia64/kernel/perfmon.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c index cb592773c78b..44b148fbb560 100644 --- a/arch/ia64/kernel/perfmon.c +++ b/arch/ia64/kernel/perfmon.c @@ -2662,7 +2662,7 @@ pfm_context_create(pfm_context_t *ctx, void *arg, int count, struct pt_regs *reg ret = -ENOMEM; - fd = get_unused_fd(); + fd = get_unused_fd_flags(0); if (fd < 0) return fd; -- 1.8.5.3 -- 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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