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Date: Tue, 03 Jun 2014 14:09:43 +0100 From: Roger Willcocks <roger@...mlight.ltd.uk> To: Theodore Ts'o <tytso@....edu> Cc: "H. Peter Anvin" <hpa@...or.com>, Nicolas Pitre <nicolas.pitre@...aro.org>, linux-arch@...r.kernel.org, Linux NFS Mailing List <linux-nfs@...r.kernel.org>, Arnd Bergmann <arnd@...db.de>, LKML Kernel <linux-kernel@...r.kernel.org>, xfs@....sgi.com, Christoph Hellwig <hch@...radead.org>, Chuck Lever <chuck.lever@...cle.com>, john.stultz@...aro.org, lftan@...era.com, linux-fsdevel <linux-fsdevel@...r.kernel.org>, geert@...ux-m68k.org, tglx@...utronix.de, joseph@...esourcery.com Subject: Re: [RFC 11/32] xfs: convert to struct inode_time On Mon, 2014-06-02 at 19:32 -0400, Theodore Ts'o wrote: > Linux's time(2) can return (time_t) -1 and set errno to EFAULT, per > the Posix specification: > > SYSCALL_DEFINE1(time, time_t __user *, tloc) > { > time_t i = get_seconds(); > > if (tloc) { > if (put_user(i,tloc)) > return -EFAULT; > } > force_successful_syscall_return(); > return i; > } get_seconds() returns an unsigned long so there's potential for overflow here. -- Roger -- 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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