staging: lustre: fix error deref in ll_splice_alias().

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d_splice_alias() can return an ERR_PTR().
If it does while debugging is enabled, the following
CDEBUG() will dereference that error and crash.

So add appropriate checking, and provide a separate
debug message for the error case.

Reported-and-tested-by: James Simmons <jsimmons@infradead.org>
Fixes: e9d4f0b9f5 ("staging: lustre: llite: use d_splice_alias for directories.")
Reviewed-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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NeilBrown 2018-05-07 10:54:48 +10:00 • committed by Greg Kroah-Hartman

parent 9604c7ac20

commit 1d6e65bedf

1 changed files with 7 additions and 2 deletions

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drivers/staging/lustre/lustre/llite/namei.c

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