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| author | Christian Brauner <[email protected]> | 2025-04-03 14:09:03 +0000 |
|---|---|---|
| committer | Christian Brauner <[email protected]> | 2025-04-07 07:38:24 +0000 |
| commit | 8cf4b738f6d84fdd8d7ff1e8d0e2298ded3e4153 (patch) | |
| tree | af530cf46f174b84cc5af25ebffcfe5522eda6f9 /net/unix/af_unix.c | |
| parent | pidfd: remove unneeded NULL check from pidfd_prepare() (diff) | |
| download | kernel-8cf4b738f6d84fdd8d7ff1e8d0e2298ded3e4153.tar.gz kernel-8cf4b738f6d84fdd8d7ff1e8d0e2298ded3e4153.zip | |
pidfd: improve uapi when task isn't found
We currently report EINVAL whenever a struct pid has no tasked attached
anymore thereby conflating two concepts:
(1) The task has already been reaped.
(2) The caller requested a pidfd for a thread-group leader but the pid
actually references a struct pid that isn't used as a thread-group
leader.
This is causing issues for non-threaded workloads as in [1].
This patch tries to allow userspace to distinguish between (1) and (2).
This is racy of course but that shouldn't matter.
Link: https://github.com/systemd/systemd/pull/36982 [1]
Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Oleg Nesterov <[email protected]>
Signed-off-by: Christian Brauner <[email protected]>
Diffstat (limited to 'net/unix/af_unix.c')
0 files changed, 0 insertions, 0 deletions