coredump: fix error handling for replace_fd()

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commit 95c5f43181 upstream.

The replace_fd() helper returns the file descriptor number on success
and a negative error code on failure. The current error handling in
umh_pipe_setup() only works because the file descriptor that is replaced
is zero but that's pretty volatile. Explicitly check for a negative
error code.

Link: https://lore.kernel.org/20250414-work-coredump-v2-2-685bf231f828@kernel.org
Tested-by: Luca Boccassi <luca.boccassi@gmail.com>
Reviewed-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Christian Brauner 2025-04-14 15:55:06 +02:00 • committed by Greg Kroah-Hartman

parent a6d87cce78

commit 8fdca436d8

1 changed files with 7 additions and 2 deletions

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fs/coredump.c

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