[v1] linux-user: Filter /proc/*/task/ and validate tkill targets

[PATCH 0/3] linux-user: Filter /proc/*/task/ and validate tkill targets

Ali Raza posted 3 patches 2 weeks ago

Diff against v2
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git fetch https://github.com/patchew-project/qemu tags/patchew/20260415-master-v1-0-8dd2ef111eee@gmail.com

Maintainers: Laurent Vivier <laurent@vivier.eu>, Pierrick Bouvier <pierrick.bouvier@linaro.org>, "Alex Bennée" <alex.bennee@linaro.org>

There is a newer version of this series

linux-user/syscall.c                        | 114 +++++++++++++++++-
tests/tcg/multiarch/Makefile.target         |   2 +
tests/tcg/multiarch/linux/linux-proc-task.c | 178 ++++++++++++++++++++++++++++
3 files changed, 292 insertions(+), 2 deletions(-)

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[PATCH 0/3] linux-user: Filter /proc/*/task/ and validate tkill targets

Posted by Ali Raza 2 weeks ago

This series fixes a problem where QEMU user-mode exposes internal
host threads (RCU, TCG workers) to guest processes via /proc/*/task/
and allows the guest to signal them via tkill/tgkill.
 
Patch 1: Filters getdents/getdents64 on /proc/<pid>/task/
Patch 2: Validates tkill/tgkill targets against guest CPU list
Patch 3: Adds a multiarch test exercising both fixes

Signed-off-by: Ali Raza <elirazamumtaz@gmail.com>
---
Ali Raza (3):
      linux-user: Filter /proc/*/task/ to hide QEMU-internal threads
      linux-user: Validate tkill/tgkill targets are guest threads
      tests/tcg: Add test for /proc/self/task/ filtering and tkill validation

 linux-user/syscall.c                        | 114 +++++++++++++++++-
 tests/tcg/multiarch/Makefile.target         |   2 +
 tests/tcg/multiarch/linux/linux-proc-task.c | 178 ++++++++++++++++++++++++++++
 3 files changed, 292 insertions(+), 2 deletions(-)
---
base-commit: da6c4fe60fee30dd77267764d55b38af9cb89d4b
change-id: 20260415-master-3a0fa2ebf2d5

Best regards,
--  
Ali Raza <elirazamumtaz@gmail.com>