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| author | Robin Dong | 2011-07-18 05:43:42 +0200 |
|---|---|---|
| committer | Theodore Ts'o | 2011-07-18 05:43:42 +0200 |
| commit | d46203159ed376fdbe2b05aa57e58207bf27a8f9 (patch) | |
| tree | 8bcbe5545066606b12d6cd250747471802520c0b /COPYING | |
| parent | ext4: avoid wasted extent cache lookup if !PUNCH_OUT_EXT (diff) | |
| download | kernel-qcow2-linux-d46203159ed376fdbe2b05aa57e58207bf27a8f9.tar.gz kernel-qcow2-linux-d46203159ed376fdbe2b05aa57e58207bf27a8f9.tar.xz kernel-qcow2-linux-d46203159ed376fdbe2b05aa57e58207bf27a8f9.zip | |
ext4: avoid eh_entries overflow before insert extent_idx
If eh_entries is equal to (or greater than) eh_max, the operation of
inserting new extent_idx will make number of entries overflow.
So check eh_entries before inserting the new extent_idx.
Although there is no bug case according the code (function
ext4_ext_insert_index is called by ext4_ext_split and ext4_ext_split
is called only if the index block has free space), the right logic
should be "lookup the capacity before insertion".
Signed-off-by: Robin Dong <sanbai@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'COPYING')
0 files changed, 0 insertions, 0 deletions