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posix: eventfd: Fix unsetting internal flags in ioctl

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Commit e6eb0a705b ("posix: eventfd: revise locking, signaling, and
allocation") introduced a regression where the internal flags of an
event file descriptor would be erased when calling the F_SETFL ioctl
operation.

This includes the flag EFD_IN_USE_INTERNAL which determines whether
this file descriptor has been opened, thus effectively closing the
eventfd whenever one tries to change a flag.

Signed-off-by: Celina Sophie Kalus <hello@celinakalus.de>
This commit is contained in:
Celina Sophie Kalus 2024-04-10 11:41:32 +02:00 • committed by Chris Friedt
commit 5bd86eaddb
1 changed files with 3 additions and 1 deletions
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4
lib/posix/options/eventfd.c
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@ -247,7 +247,9 @@ static int eventfd_ioctl_op(void *obj, unsigned int request, va_list args)
errno = EINVAL; errno = EINVAL;
ret = -1; ret = -1;
} else { } else {
efd->flags = flags; int prev_flags = efd->flags & ~EFD_FLAGS_SET_INTERNAL;
efd->flags = flags | prev_flags;
ret = 0; ret = 0;
} }
} break; } break;