From 62568510b8e2679cbc331d7de10ea9ba81ae8b3d Mon Sep 17 00:00:00 2001 From: Bernd Schmidt Date: Tue, 13 Jan 2009 22:14:48 +0100 Subject: [PATCH] Fix timeouts in sys_pselect7 Since we (Analog Devices) updated our Blackfin kernel to 2.6.28, we've seen occasional 5-second hangs from telnet. telnetd calls select with a NULL timeout, but with the new kernel, the system call occasionally returns 0, which causes telnet to call sleep (5). This did not happen with earlier kernels. The code in sys_pselect7 looks a bit strange, in particular the variable "to" is initialized to NULL, then changed if a non-null timeout was passed in, but not used further. It needs to be passed to core_sys_select instead of &end_time. This bug was introduced by 8ff3e8e85fa6c312051134b3953e397feb639f51 ("select: switch select() and poll() over to hrtimers"). Signed-off-by: Bernd Schmidt Reviewed-by: Ulrich Drepper Tested-by: Robin Getz Cc: stable@kernel.org Signed-off-by: Linus Torvalds --- fs/select.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/select.c b/fs/select.c index 08b91be..b0cf1f0 100644 --- a/fs/select.c +++ b/fs/select.c @@ -610,7 +610,7 @@ asmlinkage long sys_pselect7(int n, fd_set __user *inp, fd_set __user *outp, sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved); } - ret = core_sys_select(n, inp, outp, exp, &end_time); + ret = core_sys_select(n, inp, outp, exp, to); ret = poll_select_copy_remaining(&end_time, tsp, 0, ret); if (ret == -ERESTARTNOHAND) { -- 2.7.4