linux-stable.git/drivers/mtd/ubi, branch linux-5.6.y

ubi: Fix seq_file usage in detailed_erase_block_info debugfs file

2020-05-27T15:48:03+00:00

[ Upstream commit 0e7572cffe442290c347e779bf8bd4306bb0aa7c ]

3bfa7e141b0b ("fs/seq_file.c: seq_read(): add info message about buggy .next functions")
showed that we don't use seq_file correctly.
So make sure that our ->next function always updates the position.

Fixes: 7bccd12d27b7 ("ubi: Add debugfs file for tracking PEB state")
Signed-off-by: Richard Weinberger 
Signed-off-by: Sasha Levin

ubi: fastmap: Free unused fastmap anchor peb during detach

2020-04-13T11:18:06+00:00

commit c16f39d14a7e0ec59881fbdb22ae494907534384 upstream.

When CONFIG_MTD_UBI_FASTMAP is enabled, fm_anchor will be assigned
a free PEB during ubi_wl_init() or ubi_update_fastmap(). However
if fastmap is not used or disabled on the MTD device, ubi_wl_entry
related with the PEB will not be freed during detach.

So Fix it by freeing the unused fastmap anchor during detach.

Fixes: f9c34bb52997 ("ubi: Fix producing anchor PEBs")
Reported-by: syzbot+f317896aae32eb281a58@syzkaller.appspotmail.com
Reviewed-by: Sascha Hauer 
Signed-off-by: Hou Tao 
Signed-off-by: Richard Weinberger 
Signed-off-by: Greg Kroah-Hartman

treewide: remove redundant IS_ERR() before error code check

2020-02-04T03:05:27+00:00

'PTR_ERR(p) == -E*' is a stronger condition than IS_ERR(p).
Hence, IS_ERR(p) is unneeded.

The semantic patch that generates this commit is as follows:

// 
@@
expression ptr;
constant error_code;
@@
-IS_ERR(ptr) && (PTR_ERR(ptr) == - error_code)
+PTR_ERR(ptr) == - error_code
// 

Link: http://lkml.kernel.org/r/20200106045833.1725-1-masahiroy@kernel.org
Signed-off-by: Masahiro Yamada 
Cc: Julia Lawall 
Acked-by: Stephen Boyd  [drivers/clk/clk.c]
Acked-by: Bartosz Golaszewski  [GPIO]
Acked-by: Wolfram Sang  [drivers/i2c]
Acked-by: Rafael J. Wysocki  [acpi/scan.c]
Acked-by: Rob Herring 
Cc: Eric Biggers 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

ubi: Fix an error pointer dereference in error handling code

2020-01-19T22:23:28+00:00

If "seen_pebs = init_seen(ubi);" fails then "seen_pebs" is an error pointer
and we try to kfree() it which results in an Oops.

This patch re-arranges the error handling so now it only frees things
which have been allocated successfully.

Fixes: daef3dd1f0ae ("UBI: Fastmap: Add self check to detect absent PEBs")
Signed-off-by: Dan Carpenter 
Signed-off-by: Richard Weinberger

ubi: Free the normal volumes in error paths of ubi_attach_mtd_dev()

2020-01-16T22:35:59+00:00

The allocated normal volumes saved in ubi->volumes are not freed
in the error paths in ubi_attach_mtd_dev() and its callees (e.g.
ubi_attach() and ubi_read_volume_table()).

These normal volumes should be freed through kill_volumes() and
vol_release(), but ubi_attach_mtd_dev() may fail before
calling uif_init(), and there will be memory leaks.

So adding a new helper ubi_free_all_volumes() to free the normal
and the internal volumes. And in order to prevent double-free
of volume, reset ubi->volumes[i] to NULL after freeing.

Signed-off-by: Hou Tao 
Signed-off-by: Richard Weinberger

ubi: Check the presence of volume before call ubi_fastmap_destroy_checkmap()

2020-01-16T22:35:48+00:00

Else there may be oops when fastmap is enabled and init_volumes() fails.

Signed-off-by: Hou Tao 
Signed-off-by: Richard Weinberger

ubi: wl: Remove set but not used variable 'prev_e'

2020-01-16T22:35:20+00:00

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/mtd/ubi/wl.c: In function 'find_wl_entry':
drivers/mtd/ubi/wl.c:322:27: warning:
 variable 'prev_e' set but not used [-Wunused-but-set-variable]

It's not used any more now, so remove it.

Fixes: f9c34bb52997 ("ubi: Fix producing anchor PEBs")
Signed-off-by: YueHaibing 
Signed-off-by: Richard Weinberger

ubi: fastmap: Fix inverted logic in seen selfcheck

2020-01-16T22:34:50+00:00

set_seen() sets the bit corresponding to the PEB number in the bitmap,
so when self_check_seen() wants to find PEBs that haven't been seen we
have to print the PEBs that have their bit cleared, not the ones which
have it set.

Fixes: 5d71afb00840 ("ubi: Use bitmaps in Fastmap self-check code")
Signed-off-by: Sascha Hauer 
Signed-off-by: Richard Weinberger

Merge tag 'upstream-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs

2019-12-03T01:06:34+00:00

Pull UBI/UBIFS/JFFS2 updates from Richard Weinberger:
 "This pull request contains mostly fixes for UBI, UBIFS and JFFS2:

  UBI:

   - Fix a regression around producing a anchor PEB for fastmap.

     Due to a change in our locking fastmap was unable to produce fresh
     anchors an re-used the existing one a way to often.

  UBIFS:

   - Fixes for endianness. A few places blindly assumed little endian.

   - Fix for a memory leak in the orphan code.

   - Fix for a possible crash during a commit.

   - Revert a wrong bugfix.

  JFFS2:

   - Revert a bad bugfix (false positive from a code checking tool)"

* tag 'upstream-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs:
  Revert "jffs2: Fix possible null-pointer dereferences in jffs2_add_frag_to_fragtree()"
  ubi: Fix producing anchor PEBs
  ubifs: ubifs_tnc_start_commit: Fix OOB in layout_in_gaps
  ubifs: do_kill_orphans: Fix a memory leak bug
  Revert "ubifs: Fix memory leak bug in alloc_ubifs_info() error path"
  ubifs: Fix type of sup->hash_algo
  ubifs: Fixed missed le64_to_cpu() in journal
  ubifs: Force prandom result to __le32
  ubifs: Remove obsolete TODO from dfs_file_write()
  ubi: Fix warning static is not at beginning of declaration
  ubi: Print skip_check in ubi_dump_vol_info()

Merge tag 'compat-ioctl-5.5' of git://git.kernel.org:/pub/scm/linux/kernel/git/arnd/playground

2019-12-01T21:46:15+00:00

Pull removal of most of fs/compat_ioctl.c from Arnd Bergmann:
 "As part of the cleanup of some remaining y2038 issues, I came to
  fs/compat_ioctl.c, which still has a couple of commands that need
  support for time64_t.

  In completely unrelated work, I spent time on cleaning up parts of
  this file in the past, moving things out into drivers instead.

  After Al Viro reviewed an earlier version of this series and did a lot
  more of that cleanup, I decided to try to completely eliminate the
  rest of it and move it all into drivers.

  This series incorporates some of Al's work and many patches of my own,
  but in the end stops short of actually removing the last part, which
  is the scsi ioctl handlers. I have patches for those as well, but they
  need more testing or possibly a rewrite"

* tag 'compat-ioctl-5.5' of git://git.kernel.org:/pub/scm/linux/kernel/git/arnd/playground: (42 commits)
  scsi: sd: enable compat ioctls for sed-opal
  pktcdvd: add compat_ioctl handler
  compat_ioctl: move SG_GET_REQUEST_TABLE handling
  compat_ioctl: ppp: move simple commands into ppp_generic.c
  compat_ioctl: handle PPPIOCGIDLE for 64-bit time_t
  compat_ioctl: move PPPIOCSCOMPRESS to ppp_generic
  compat_ioctl: unify copy-in of ppp filters
  tty: handle compat PPP ioctls
  compat_ioctl: move SIOCOUTQ out of compat_ioctl.c
  compat_ioctl: handle SIOCOUTQNSD
  af_unix: add compat_ioctl support
  compat_ioctl: reimplement SG_IO handling
  compat_ioctl: move WDIOC handling into wdt drivers
  fs: compat_ioctl: move FITRIM emulation into file systems
  gfs2: add compat_ioctl support
  compat_ioctl: remove unused convert_in_user macro
  compat_ioctl: remove last RAID handling code
  compat_ioctl: remove /dev/raw ioctl translation
  compat_ioctl: remove PCI ioctl translation
  compat_ioctl: remove joystick ioctl translation
  ...