Merge branch 'linux-next' of git://git.infradead.org/ubifs-2.6
* '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
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commit
5c395ae703
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@ -1028,12 +1028,14 @@ int ubi_eba_copy_leb(struct ubi_device *ubi, int from, int to,
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* 'ubi_wl_put_peb()' function on the @ubi->move_mutex. In turn, we are
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* holding @ubi->move_mutex and go sleep on the LEB lock. So, if the
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* LEB is already locked, we just do not move it and return
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* %MOVE_CANCEL_RACE, which means that UBI will re-try, but later.
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* %MOVE_RETRY. Note, we do not return %MOVE_CANCEL_RACE here because
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* we do not know the reasons of the contention - it may be just a
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* normal I/O on this LEB, so we want to re-try.
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*/
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err = leb_write_trylock(ubi, vol_id, lnum);
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if (err) {
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dbg_wl("contention on LEB %d:%d, cancel", vol_id, lnum);
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return MOVE_CANCEL_RACE;
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return MOVE_RETRY;
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}
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/*
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@ -120,6 +120,7 @@ enum {
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* PEB
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* MOVE_CANCEL_BITFLIPS: canceled because a bit-flip was detected in the
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* target PEB
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* MOVE_RETRY: retry scrubbing the PEB
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*/
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enum {
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MOVE_CANCEL_RACE = 1,
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@ -127,6 +128,7 @@ enum {
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MOVE_TARGET_RD_ERR,
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MOVE_TARGET_WR_ERR,
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MOVE_CANCEL_BITFLIPS,
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MOVE_RETRY,
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};
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/**
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@ -795,7 +795,10 @@ static int wear_leveling_worker(struct ubi_device *ubi, struct ubi_work *wrk,
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protect = 1;
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goto out_not_moved;
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}
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if (err == MOVE_RETRY) {
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scrubbing = 1;
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goto out_not_moved;
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}
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if (err == MOVE_CANCEL_BITFLIPS || err == MOVE_TARGET_WR_ERR ||
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err == MOVE_TARGET_RD_ERR) {
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/*
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@ -1049,7 +1052,6 @@ static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk,
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ubi_err("failed to erase PEB %d, error %d", pnum, err);
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kfree(wl_wrk);
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kmem_cache_free(ubi_wl_entry_slab, e);
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if (err == -EINTR || err == -ENOMEM || err == -EAGAIN ||
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err == -EBUSY) {
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@ -1062,14 +1064,16 @@ static int erase_worker(struct ubi_device *ubi, struct ubi_work *wl_wrk,
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goto out_ro;
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}
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return err;
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} else if (err != -EIO) {
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}
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kmem_cache_free(ubi_wl_entry_slab, e);
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if (err != -EIO)
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/*
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* If this is not %-EIO, we have no idea what to do. Scheduling
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* this physical eraseblock for erasure again would cause
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* errors again and again. Well, lets switch to R/O mode.
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*/
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goto out_ro;
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}
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/* It is %-EIO, the PEB went bad */
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@ -1986,12 +1986,11 @@ again:
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if (path[h].in_tree)
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continue;
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nnode = kmalloc(sz, GFP_NOFS);
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nnode = kmemdup(&path[h].nnode, sz, GFP_NOFS);
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if (!nnode) {
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err = -ENOMEM;
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goto out;
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}
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memcpy(nnode, &path[h].nnode, sz);
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parent = nnode->parent;
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parent->nbranch[nnode->iip].nnode = nnode;
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path[h].ptr.nnode = nnode;
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@ -2004,12 +2003,11 @@ again:
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const size_t sz = sizeof(struct ubifs_pnode);
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struct ubifs_nnode *parent;
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pnode = kmalloc(sz, GFP_NOFS);
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pnode = kmemdup(&path[h].pnode, sz, GFP_NOFS);
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if (!pnode) {
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err = -ENOMEM;
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goto out;
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}
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memcpy(pnode, &path[h].pnode, sz);
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parent = pnode->parent;
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parent->nbranch[pnode->iip].pnode = pnode;
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path[h].ptr.pnode = pnode;
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@ -344,12 +344,11 @@ static int lnc_add(struct ubifs_info *c, struct ubifs_zbranch *zbr,
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return err;
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}
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lnc_node = kmalloc(zbr->len, GFP_NOFS);
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lnc_node = kmemdup(node, zbr->len, GFP_NOFS);
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if (!lnc_node)
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/* We don't have to have the cache, so no error */
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return 0;
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memcpy(lnc_node, node, zbr->len);
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zbr->leaf = lnc_node;
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return 0;
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}
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@ -138,12 +138,11 @@ static int create_xattr(struct ubifs_info *c, struct inode *host,
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ui = ubifs_inode(inode);
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ui->xattr = 1;
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ui->flags |= UBIFS_XATTR_FL;
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ui->data = kmalloc(size, GFP_NOFS);
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ui->data = kmemdup(value, size, GFP_NOFS);
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if (!ui->data) {
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err = -ENOMEM;
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goto out_free;
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}
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memcpy(ui->data, value, size);
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inode->i_size = ui->ui_size = size;
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ui->data_len = size;
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@ -204,12 +203,11 @@ static int change_xattr(struct ubifs_info *c, struct inode *host,
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return err;
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kfree(ui->data);
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ui->data = kmalloc(size, GFP_NOFS);
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ui->data = kmemdup(value, size, GFP_NOFS);
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if (!ui->data) {
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err = -ENOMEM;
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goto out_free;
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}
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memcpy(ui->data, value, size);
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inode->i_size = ui->ui_size = size;
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ui->data_len = size;
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