[kernel-hardening] [PATCH 0/3] kallsyms: don't leak address

["Tobin C. Harding" <me@tobin.cc>]

This set plugs a kernel address leak that occurs if kallsyms symbol
look up fails. This set was prompted by a leaking address found using
scripts/leaking_addresses.pl on a PowerPC machine in the wild.

Patch set does not change behaviour when KALLSYMS is not defined
(suggested by Linus).

RFC has been in flight for 3 weeks with no negative response.

Patch 1 - return error code if symbol look up fails.
Patch 2 - print <no-symbol> to buffer if symbol look up returns an error.
Patch 3 - maintain current behaviour in ftrace.

Patch 3 (the ftrace stuff) is untested.

thanks,
Tobin.

Tobin C. Harding (3):
  kallsyms: don't leak address when symbol not found
  vsprintf: print <no-symbol> if symbol not found
  trace: print address if symbol not found

 include/linux/kernel.h           |  2 ++
 kernel/kallsyms.c                |  6 ++++--
 kernel/trace/trace.h             | 24 ++++++++++++++++++++++++
 kernel/trace/trace_events_hist.c |  6 +++---
 lib/vsprintf.c                   | 18 +++++++++++++++---
 5 files changed, 48 insertions(+), 8 deletions(-)

-- 
2.7.4