diff options
| author | Philippe Elie <[email protected]> | 2007-11-14 16:58:48 -0800 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2007-11-14 18:45:37 -0800 |
| commit | df9d177aa28d50e64bae6fbd6b263833079e3571 (patch) | |
| tree | b265158232a39d9d45cac0a97d5fdc17e7ca237d /arch/um/os-Linux/file.c | |
| parent | 03ad369ac900116f35da7505f768ebbd481d09a4 (diff) | |
oProfile: oops when profile_pc() returns ~0LU
Instruction pointer returned by profile_pc() can be a random value. This
break the assumption than we can safely set struct op_sample.eip field to a
magic value to signal to the per-cpu buffer reader side special event like
task switch ending up in a segfault in get_task_mm() when profile_pc()
return ~0UL. Fixed by sanitizing the sampled eip and reject/log invalid
eip.
Problem reported by Sami Farin, patch tested by him.
Signed-off-by: Philippe Elie <[email protected]>
Tested-by: Sami Farin <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'arch/um/os-Linux/file.c')
0 files changed, 0 insertions, 0 deletions