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| author | Ross Zwisler <ross.zwisler@linux.intel.com> | 2016-03-09 14:08:27 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-03-09 15:43:42 -0800 |
| commit | 30f471fd88e0304bee2c17ef1a4651e705870817 (patch) | |
| tree | 0fe15e01cee010e6b4461f0da76092f68d1bba32 /fs/dax.c | |
| parent | 566e8dfd88d9e0d12873ca69c26e82c0af8479d8 (diff) | |
| download | linux-stable-30f471fd88e0304bee2c17ef1a4651e705870817.tar.gz linux-stable-30f471fd88e0304bee2c17ef1a4651e705870817.tar.bz2 linux-stable-30f471fd88e0304bee2c17ef1a4651e705870817.zip | |
dax: check return value of dax_radix_entry()
dax_pfn_mkwrite() previously wasn't checking the return value of the
call to dax_radix_entry(), which was a mistake.
Instead, capture this return value and return the appropriate VM_FAULT_
value.
Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Matthew Wilcox <willy@linux.intel.com>
Cc: Dave Chinner <david@fromorbit.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/dax.c')
| -rw-r--r-- | fs/dax.c | 9 |
1 files changed, 8 insertions, 1 deletions
@@ -1056,6 +1056,7 @@ EXPORT_SYMBOL_GPL(dax_pmd_fault); int dax_pfn_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) { struct file *file = vma->vm_file; + int error; /* * We pass NO_SECTOR to dax_radix_entry() because we expect that a @@ -1065,7 +1066,13 @@ int dax_pfn_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) * saves us from having to make a call to get_block() here to look * up the sector. */ - dax_radix_entry(file->f_mapping, vmf->pgoff, NO_SECTOR, false, true); + error = dax_radix_entry(file->f_mapping, vmf->pgoff, NO_SECTOR, false, + true); + + if (error == -ENOMEM) + return VM_FAULT_OOM; + if (error) + return VM_FAULT_SIGBUS; return VM_FAULT_NOPAGE; } EXPORT_SYMBOL_GPL(dax_pfn_mkwrite); |