[lkml]   [2007]   [Aug]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH] Reset current->pdeath_signal on SUID binary execution

>> the attached patch fixes a flaw in the "parent process death signal"
>> when executing SUID binaries. An unprivileged user may send arbitrary
>> signal to a child process even if it is running with higher privileges.
>> The idea to fix this issue is to reset pdeath_signal not only on fork,
>> but also on the execution of a SUID binary.
>> Michael, if we fix it this way, then the prctl() manual page should
>> reflect that behavior.
> the patch has been merged into 2.4 and 2.6, so the manual page needs an
> update at some point.

I see your patch at:

But it's not clear to me in which 2.4.x and 2.6.x versions the change occurred (it isn't in 2.6.23-rc3 -- is it scheduled
for 2.6.23-rc4?). Can you enlighten me?



>> From comments it seems that we have to also reset pdeath_signal inside
>> LSM when it comes to capability-raised executes, but I must admit that I
>> got lost there.
> No further comments for this one? I am not familiar enough with it.
> Regards
> Marcel

Michael Kerrisk
maintainer of Linux man pages Sections 2, 3, 4, 5, and 7

Want to help with man page maintenance? Grab the latest tarball at
read the HOWTOHELP file and grep the source files for 'FIXME'.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2007-08-27 17:37    [W:0.057 / U:2.724 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site