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staging/lustre/vvp: release mmap_sem in error case
The mmap_sem is downed in vvp_mmap_locks, but in case of error from cl_io_lock_alloc_add, it is not upped. Credit to Paul Casella at Cray for finding this. Signed-off-by: Patrick Farrell <paf@cray.com> Reviewed-on: http://review.whamcloud.com/10741 Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-5221 Reviewed-by: Andreas Dilger <andreas.dilger@intel.com> Signed-off-by: Oleg Drokin <oleg.drokin@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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1 changed files with 3 additions and 1 deletions
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@ -269,8 +269,10 @@ static int vvp_mmap_locks(const struct lu_env *env,
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descr->cld_mode, descr->cld_start,
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descr->cld_end);
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if (result < 0)
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if (result < 0) {
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up_read(&mm->mmap_sem);
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return result;
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}
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if (vma->vm_end - addr >= count)
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break;
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