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| author | Chris Metcalf <[email protected]> | 2010-10-28 19:47:06 +0000 |
|---|---|---|
| committer | Chris Metcalf <[email protected]> | 2010-11-01 19:31:17 +0000 |
| commit | 1deb9c5dfb179819ecdbf80a1d121e26c63caab3 (patch) | |
| tree | c6f6ec6030eb22f094a65c07e63312758d079794 /tools/perf/scripts/python | |
| parent | arch/tile: correct double syscall restart for nested signals (diff) | |
| download | kernel-1deb9c5dfb179819ecdbf80a1d121e26c63caab3.tar.gz kernel-1deb9c5dfb179819ecdbf80a1d121e26c63caab3.zip | |
arch/tile: don't allow user code to set the PL via ptrace or signal return
The kernel was allowing any component of the pt_regs to be updated either
by signal handlers writing to the stack, or by processes writing via
PTRACE_POKEUSR or PTRACE_SETREGS, which meant they could set their PL
up from 0 to 1 and get access to kernel code and data (or, in practice,
cause a kernel panic). We now always reset the ex1 field, allowing the
user to set their ICS bit only.
Signed-off-by: Chris Metcalf <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions