This is a follow up on Eric's patch series to fix the deadlocks observed with ptracing when execve in multi-threaded applications.
This fixes the simple and most important case where the cred_guard_mutex causes strace to deadlock.
This also adds a test case (which is only partially fixed so far, the rest of the fixes will follow soon).
Two trivial comment fixes are also included.
Bernd Edlinger (4): exec: Fix a deadlock in ptrace selftests/ptrace: add test cases for dead-locks mm: docs: Fix a comment in process_vm_rw_core kernel: doc: remove outdated comment in prepare_kernel_cred
kernel/cred.c | 2 - kernel/fork.c | 4 +- mm/process_vm_access.c | 2 +- tools/testing/selftests/ptrace/Makefile | 4 +- tools/testing/selftests/ptrace/vmaccess.c | 86 +++++++++++++++++++++++++++++++ 5 files changed, 91 insertions(+), 7 deletions(-) create mode 100644 tools/testing/selftests/ptrace/vmaccess.c