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UBIFS: fix crash on error path

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This patch fixes a regression introduced by
"4994297 UBIFS: make ubifs_lpt_init clean-up in case of failure" which
I've hit while running the 'integck -p' test. When remount the file-system
from R/O mode to R/W mode and 'lpt_init_wr()' fails, we free _all_ LPT
resources by calling 'ubifs_lpt_free(c, 0)', even those needed for R/O
mode. This leads to subsequent crashes, e.g., if we try to unmount
the file-system.

Cc: stable@vger.kernel.org [v3.5+]
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
This commit is contained in:
Artem Bityutskiy 2012-08-20 15:16:24 +03:00
commit 11e3be0be2
1 changed files with 4 additions and 1 deletions
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5
fs/ubifs/lpt.c
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@ -1749,7 +1749,10 @@ int ubifs_lpt_init(struct ubifs_info *c, int rd, int wr)
return 0;
out_err:
ubifs_lpt_free(c, 0);
if (wr)
ubifs_lpt_free(c, 1);
if (rd)
ubifs_lpt_free(c, 0);
return err;
}