nfsd: call op_release, even when op_func returns an error

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For ops with "trivial" replies, nfsd4_encode_operation will shortcut
most of the encoding work and skip to just marshalling up the status.
One of the things it skips is calling op_release. This could cause a
memory leak in the layoutget codepath if there is an error at an
inopportune time.

Have the compound processing engine always call op_release, even when
op_func sets an error in op->status. With this change, we also need
nfsd4_block_get_device_info_scsi to set the gd_device pointer to NULL
on error to avoid a double free.

Reported-by: Zhi Li <yieli@redhat.com>
Link: https://bugzilla.redhat.com/show_bug.cgi?id=2181403
Fixes: 34b1744c91 ("nfsd4: define ->op_release for compound ops")
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

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This commit is contained in:

Jeff Layton 2023-03-27 06:21:37 -04:00 • committed by Chuck Lever

parent 804d8e0a6e

commit 15a8b55dbb

2 changed files with 6 additions and 6 deletions

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1

fs/nfsd/blocklayout.c

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11

fs/nfsd/nfs4xdr.c

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