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| author | Ming Lei <ming.lei@redhat.com> | 2018-04-16 17:48:41 +0800 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2018-04-19 00:41:03 -0400 |
| commit | 8e1ceafe50ec4d1bcfae154dd70e7cb6946a6177 (patch) | |
| tree | 2fe1f5db06d2b1ab9358cf12187844968d96e174 /drivers/target | |
| parent | ccce20fc7968d546fb1e8e147bf5cdc8afc4278a (diff) | |
| download | op-kernel-dev-8e1ceafe50ec4d1bcfae154dd70e7cb6946a6177.zip op-kernel-dev-8e1ceafe50ec4d1bcfae154dd70e7cb6946a6177.tar.gz | |
scsi: target: fix crash with iscsi target and dvd
When the current page can't be added to bio, one new bio should be
created for adding this page again, instead of ignoring this page.
This patch fixes kernel crash with iscsi target and dvd, as reported by
Wakko.
Cc: Wakko Warner <wakko@animx.eu.org>
Cc: Bart Van Assche <Bart.VanAssche@wdc.com>
Cc: target-devel@vger.kernel.org
Cc: linux-scsi@vger.kernel.org
Cc: "Nicholas A. Bellinger" <nab@linux-iscsi.org>
Cc: Christoph Hellwig <hch@lst.de>
Fixes: 84c8590646d5b35804 ("target: avoid accessing .bi_vcnt directly")
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/target')
| -rw-r--r-- | drivers/target/target_core_pscsi.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/target/target_core_pscsi.c b/drivers/target/target_core_pscsi.c index 0d99b24..6cb933e 100644 --- a/drivers/target/target_core_pscsi.c +++ b/drivers/target/target_core_pscsi.c @@ -890,6 +890,7 @@ pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, bytes = min(bytes, data_len); if (!bio) { +new_bio: nr_vecs = min_t(int, BIO_MAX_PAGES, nr_pages); nr_pages -= nr_vecs; /* @@ -931,6 +932,7 @@ pscsi_map_sg(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, * be allocated with pscsi_get_bio() above. */ bio = NULL; + goto new_bio; } data_len -= bytes; |
