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Merge branch 'linux-next' of git://git.infradead.org/ubifs-2.6

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* 'linux-next' of git://git.infradead.org/ubifs-2.6:
  UBI: fix use-after-free on error path
  UBI: fix missing scrub when there is a bit-flip
  UBIFS: Use kmemdup rather than duplicating its implementation
This commit is contained in:
Linus Torvalds
2012-01-10 14:57:19 -08:00
parent 49d41bae46 e57e0d8e81
commit 5c395ae703
6 changed files with 19 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files
drivers/mtd/ubi/eba.c
+4 -2
View File
@@ -1028,12 +1028,14 @@ int ubi_eba_copy_leb(struct ubi_device *ubi, int from, int to,
* 'ubi_wl_put_peb()' function on the @ubi->move_mutex. In turn, we are
* holding @ubi->move_mutex and go sleep on the LEB lock. So, if the
* LEB is already locked, we just do not move it and return
* %MOVE_CANCEL_RACE, which means that UBI will re-try, but later.
* %MOVE_RETRY. Note, we do not return %MOVE_CANCEL_RACE here because
* we do not know the reasons of the contention - it may be just a
* normal I/O on this LEB, so we want to re-try.
*/
err = leb_write_trylock(ubi, vol_id, lnum);
if (err) {
dbg_wl("contention on LEB %d:%d, cancel", vol_id, lnum);
return MOVE_CANCEL_RACE;
return MOVE_RETRY;
}
/*
drivers/mtd/ubi/ubi.h
+2
View File
@@ -120,6 +120,7 @@ enum {
* PEB
* MOVE_CANCEL_BITFLIPS: canceled because a bit-flip was detected in the
* target PEB
* MOVE_RETRY: retry scrubbing the PEB
*/
enum {
MOVE_CANCEL_RACE = 1,
@@ -127,6 +128,7 @@ enum {
MOVE_TARGET_RD_ERR,
MOVE_TARGET_WR_ERR,
MOVE_CANCEL_BITFLIPS,
MOVE_RETRY,
};
/**
drivers/mtd/ubi/wl.c
+8 -4
View File
@@ -795,7 +795,10 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk,
protect = 1;
goto out_not_moved;
}
if (err == MOVE_RETRY) {
scrubbing = 1;
goto out_not_moved;
}
if (err == MOVE_CANCEL_BITFLIPS || err == MOVE_TARGET_WR_ERR ||
err == MOVE_TARGET_RD_ERR) {
/*
@@ -1049,7 +1052,6 @@ static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk,
ubi_err("failed to erase PEB %d, error %d", pnum, err);
kfree(wl_wrk);
kmem_cache_free(ubi_wl_entry_slab, e);
if (err == -EINTR || err == -ENOMEM || err == -EAGAIN ||
err == -EBUSY) {
@@ -1062,14 +1064,16 @@ static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk,
goto out_ro;
}
return err;
} else if (err != -EIO) {
}
kmem_cache_free(ubi_wl_entry_slab, e);
if (err != -EIO)
/*
* If this is not %-EIO, we have no idea what to do. Scheduling
* this physical eraseblock for erasure again would cause
* errors again and again. Well, lets switch to R/O mode.
*/
goto out_ro;
}
/* It is %-EIO, the PEB went bad */