[lkml]   [1998]   [Nov]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: swapfile security weakeness
On Thu, 5 Nov 1998, Jakub Vlasek wrote:

>i've found that active swapfile could be deleted, which is
>IMHO very dangerous (set immutable flag on in sys_swapon call?). Also,
>sys_swapon should check whether owner of swapfile is root and is readable
>only to root ( memory readableby anyone? hmm...)

KUDOS TO YOU!!!! I actually *DID* that about a year and a half
ago. I had 2 swap files and didn't need them both. I swapoff'd
one of them and deleted the wrong one. As a result I got major
kernel panics until the system froze, then when I rebooted I had
hard disk corruption on partitions that weren't even mounted in
Linux. I lost my D: drive in MSDOS which took 8 hours of
fiddling and reconstructing in Norton Diskedit to recover some

So, I agree, something should really be done to fix that, even if
only in userland.

Mike A. Harris - Computer Consultant - Linux advocate

Linux software galore:

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:45    [W:0.122 / U:3.008 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site