Re: bug reading /proc/sys/kernel/*: only first byte read.

Eric W. Biederman wrote:
[]
> However as far as I can tell the code has this limitation
> deliberately for simplicity.
> 
> Getting the string side of this fixed even by itself is
> worthwhile, although it might be worth teach people
> about sys_uname and /bin/uname.  It seems is the biggest thing
> people look at /proc/sys/ for...

I come across this very issue when I discovered another bug,
using un-initialized pipefs structures during early hotplug
calls.  I know about /bin/uname, but it requires a pipe, so
wont work.  Obvious alternative is /proc/sys/version, which
is alot faster too (no fork+exec overhead).

/mjt
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---

• References:
  • Re: bug reading /proc/sys/kernel/*: only first byte read.
    • From: Andrew Morton <[email protected]>
  • Re: bug reading /proc/sys/kernel/*: only first byte read.
    • From: Oleg Nesterov <[email protected]>
  • Re: bug reading /proc/sys/kernel/*: only first byte read.
    • From: Oleg Nesterov <[email protected]>
  • Re: bug reading /proc/sys/kernel/*: only first byte read.
    • From: [email protected] (Eric W. Biederman)

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