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| author | Richard Weinberger <richard@nod.at> | 2014-11-06 16:47:49 +0100 |
|---|---|---|
| committer | Luis Henriques <luis.henriques@canonical.com> | 2015-01-05 13:48:37 +0000 |
| commit | 0bf780a2ca3128b8f2bf5d5e1e882cb1071843a2 (patch) | |
| tree | f4310e5339fcbf5d870902792f8ae013a513b43b /drivers/mtd | |
| parent | fca4638cf8bb1d7fe976e05f05976f111c393d99 (diff) | |
| download | linux-stable-0bf780a2ca3128b8f2bf5d5e1e882cb1071843a2.tar.gz linux-stable-0bf780a2ca3128b8f2bf5d5e1e882cb1071843a2.tar.bz2 linux-stable-0bf780a2ca3128b8f2bf5d5e1e882cb1071843a2.zip | |
UBI: Fix double free after do_sync_erase()
commit aa5ad3b6eb8feb2399a5d26c8fb0060561bb9534 upstream.
If the erase worker is unable to erase a PEB it will
free the ubi_wl_entry itself.
The failing ubi_wl_entry must not free()'d again after
do_sync_erase() returns.
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
Diffstat (limited to 'drivers/mtd')
| -rw-r--r-- | drivers/mtd/ubi/wl.c | 10 |
1 files changed, 3 insertions, 7 deletions
diff --git a/drivers/mtd/ubi/wl.c b/drivers/mtd/ubi/wl.c index 0f3425dac910..89d51f94db11 100644 --- a/drivers/mtd/ubi/wl.c +++ b/drivers/mtd/ubi/wl.c @@ -1211,7 +1211,6 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk, err = do_sync_erase(ubi, e1, vol_id, lnum, 0); if (err) { - kmem_cache_free(ubi_wl_entry_slab, e1); if (e2) kmem_cache_free(ubi_wl_entry_slab, e2); goto out_ro; @@ -1225,10 +1224,8 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk, dbg_wl("PEB %d (LEB %d:%d) was put meanwhile, erase", e2->pnum, vol_id, lnum); err = do_sync_erase(ubi, e2, vol_id, lnum, 0); - if (err) { - kmem_cache_free(ubi_wl_entry_slab, e2); + if (err) goto out_ro; - } } dbg_wl("done"); @@ -1264,10 +1261,9 @@ out_not_moved: ubi_free_vid_hdr(ubi, vid_hdr); err = do_sync_erase(ubi, e2, vol_id, lnum, torture); - if (err) { - kmem_cache_free(ubi_wl_entry_slab, e2); + if (err) goto out_ro; - } + mutex_unlock(&ubi->move_mutex); return 0; |