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Subject[PATCH v3] fork: check exit_signal passed in clone3() call

As was agreed[1][2], clone3 should fail if the provided exit_signal
value fails valid_signal() check, hence the new version.

Changees since v2[3][4]:
- Rewrite the check to check exit_signal against valid_signal().

Changes since v1[5]:
- Check changed to comparison against negated CSIGNAL to address
the bug reported by Oleg[6].
- Added a comment to _do_fork that exit_signal has to be checked
by the caller.


Eugene Syromiatnikov (1):
fork: check exit_signal passed in clone3() call

kernel/fork.c | 11 +++++++++++
1 file changed, 11 insertions(+)


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