Re: KASAN: use-after-free Read in mnt_warn_timestamp_expiry

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On Thu, Oct 17, 2019 at 03:37:35AM +0100, Al Viro wrote:
> On Wed, Oct 16, 2019 at 07:27:05PM -0700, Eric Biggers wrote:
> 
> > How about the following?
> > 
> > 	pr_warn("%s filesystem being %s at %s supports timestamps until %04ld (0x%llx)\n",
> > 		sb->s_type->name,
> > 		is_mounted(mnt) ? "remounted" : "mounted",
> > 		mntpath,
> > 		tm.tm_year+1900, (unsigned long long)sb->s_time_max);
> > 
> > I think more people would understand "remounted" than "reconfigured".  Also,
> > is_mounted(mnt) seems like a better choice than mnt_has_parent(real_mount(mnt)).
> 
> Works for me(tm).  Care to fold that into your patch and resend?
> 

Sent: https://lkml.kernel.org/linux-fsdevel/20191017024814.61980-1-ebiggers@xxxxxxxxxx/T/#u



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