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| author | rogersb11 <brettrogers11@gmail.com> | 2015-11-10 11:19:31 -0600 |
|---|---|---|
| committer | rogersb11 <brettrogers11@gmail.com> | 2015-11-10 14:01:25 -0500 |
| commit | b4d16f70c34ecb908c8a61e58ea51fecdd4a4b10 (patch) | |
| tree | 973e9aeb97bb13497d17a43e6f3c070381bc5b87 /fs/bio.c | |
| parent | d177fbc2f0c263b06c18bda2eb46200a31bcbebd (diff) | |
| parent | 5dba9ddd98cbc7ad319d687887981a0ea0062c75 (diff) | |
| download | kernel_samsung_smdk4412-b4d16f70c34ecb908c8a61e58ea51fecdd4a4b10.tar.gz kernel_samsung_smdk4412-b4d16f70c34ecb908c8a61e58ea51fecdd4a4b10.tar.bz2 kernel_samsung_smdk4412-b4d16f70c34ecb908c8a61e58ea51fecdd4a4b10.zip | |
Merge remote-tracking branch 'korg/linux-3.0.y' into cm-13.0
Conflicts:
crypto/algapi.c
drivers/gpu/drm/i915/i915_debugfs.c
drivers/gpu/drm/i915/intel_display.c
drivers/video/fbmem.c
include/linux/nls.h
kernel/cgroup.c
kernel/signal.c
kernel/timeconst.pl
net/ipv4/ping.c
Change-Id: I1f532925d1743df74d66bcdd6fc92f05c72ee0dd
Diffstat (limited to 'fs/bio.c')
| -rw-r--r-- | fs/bio.c | 20 |
1 files changed, 15 insertions, 5 deletions
@@ -786,12 +786,22 @@ static int __bio_copy_iov(struct bio *bio, struct bio_vec *iovecs, int bio_uncopy_user(struct bio *bio) { struct bio_map_data *bmd = bio->bi_private; - int ret = 0; + struct bio_vec *bvec; + int ret = 0, i; - if (!bio_flagged(bio, BIO_NULL_MAPPED)) - ret = __bio_copy_iov(bio, bmd->iovecs, bmd->sgvecs, - bmd->nr_sgvecs, bio_data_dir(bio) == READ, - 0, bmd->is_our_pages); + if (!bio_flagged(bio, BIO_NULL_MAPPED)) { + /* + * if we're in a workqueue, the request is orphaned, so + * don't copy into a random user address space, just free. + */ + if (current->mm) + ret = __bio_copy_iov(bio, bmd->iovecs, bmd->sgvecs, + bmd->nr_sgvecs, bio_data_dir(bio) == READ, + 0, bmd->is_our_pages); + else if (bmd->is_our_pages) + __bio_for_each_segment(bvec, bio, i, 0) + __free_page(bvec->bv_page); + } bio_free_map_data(bmd); bio_put(bio); return ret; |