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4a1ff3c5d0
linux/fs/ubifs
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Li Zetao 4a1ff3c5d0 ubifs: Fix memory leak in alloc_wbufs() 
kmemleak reported a sequence of memory leaks, and show them as following:

  unreferenced object 0xffff8881575f8400 (size 1024):
    comm "mount", pid 19625, jiffies 4297119604 (age 20.383s)
    hex dump (first 32 bytes):
      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
      00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    backtrace:
      [<ffffffff8176cecd>] __kmalloc+0x4d/0x150
      [<ffffffffa0406b2b>] ubifs_mount+0x307b/0x7170 [ubifs]
      [<ffffffff819fa8fd>] legacy_get_tree+0xed/0x1d0
      [<ffffffff81936f2d>] vfs_get_tree+0x7d/0x230
      [<ffffffff819b2bd4>] path_mount+0xdd4/0x17b0
      [<ffffffff819b37aa>] __x64_sys_mount+0x1fa/0x270
      [<ffffffff83c14295>] do_syscall_64+0x35/0x80
      [<ffffffff83e0006a>] entry_SYSCALL_64_after_hwframe+0x46/0xb0

  unreferenced object 0xffff8881798a6e00 (size 512):
    comm "mount", pid 19677, jiffies 4297121912 (age 37.816s)
    hex dump (first 32 bytes):
      6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
      6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
    backtrace:
      [<ffffffff8176cecd>] __kmalloc+0x4d/0x150
      [<ffffffffa0418342>] ubifs_wbuf_init+0x52/0x480 [ubifs]
      [<ffffffffa0406ca5>] ubifs_mount+0x31f5/0x7170 [ubifs]
      [<ffffffff819fa8fd>] legacy_get_tree+0xed/0x1d0
      [<ffffffff81936f2d>] vfs_get_tree+0x7d/0x230
      [<ffffffff819b2bd4>] path_mount+0xdd4/0x17b0
      [<ffffffff819b37aa>] __x64_sys_mount+0x1fa/0x270
      [<ffffffff83c14295>] do_syscall_64+0x35/0x80
      [<ffffffff83e0006a>] entry_SYSCALL_64_after_hwframe+0x46/0xb0

The problem is that the ubifs_wbuf_init() returns an error in the
loop which in the alloc_wbufs(), then the wbuf->buf and wbuf->inodes
that were successfully alloced before are not freed.

Fix it by adding error hanging path in alloc_wbufs() which frees
the memory alloced before when ubifs_wbuf_init() returns an error.

Fixes: 1e51764a3c ("UBIFS: add new flash file system")
Signed-off-by: Li Zetao <lizetao1@huawei.com>
Reviewed-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
2023-02-02 21:13:43 +01:00
..
auth.c ubifs: Fix memleak in ubifs_init_authentication 2021-02-12 21:53:22 +01:00
budget.c ubifs: Reserve one leb for each journal head while doing budget 2023-02-02 21:13:40 +01:00
commit.c ubifs: Pass node length in all node dumping callers 2020-12-13 22:12:32 +01:00
compress.c ubifs: Add support for zstd compression. 2019-07-08 19:43:53 +02:00
crypto.c ubifs: Fix UBIFS ro fail due to truncate in the encrypted directory 2022-09-21 11:32:38 +02:00
debug.c treewide: use get_random_u32_below() instead of deprecated function 2022-11-18 02:15:15 +01:00
debug.h ubifs: ubifs_dump_sleb: Remove unused function 2020-12-13 22:12:38 +01:00
dir.c ubifs: do_rename: Fix wrong space budget when target inode's nlink > 1 2023-02-02 21:13:40 +01:00
file.c ubifs: Convert to filemap_migrate_folio() 2022-08-02 12:34:04 -04:00
find.c
gc.c ubifs: read-only if LEB may always be taken in ubifs_garbage_collect 2021-12-23 22:30:38 +01:00
io.c ubifs: Fix read out-of-bounds in ubifs_wbuf_write_nolock() 2022-01-10 22:58:27 +01:00
ioctl.c ubifs: setflags: Make dirtied_ino_d 8 bytes aligned 2022-01-10 22:18:42 +01:00
journal.c Random number generator fixes for Linux 6.1-rc1. 2022-10-16 15:27:07 -07:00
Kconfig fscrypt: Allow modular crypto algorithms 2019-12-31 10:33:51 -06:00
key.h ubifs: allow both hash and disk name to be provided in no-key names 2020-01-22 14:49:56 -08:00
log.c ubifs: remove unnecessary check in ubifs_log_start_commit 2019-07-08 19:43:51 +02:00
lprops.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
lpt_commit.c treewide: use get_random_u32_below() instead of deprecated function 2022-11-18 02:15:15 +01:00
lpt.c ubifs: Fix the printing type of c->big_lpt 2020-12-13 21:57:10 +01:00
Makefile ubifs: Export filesystem error counters 2021-12-23 20:23:42 +01:00
master.c ubifs: Fix spelling mistakes 2021-06-22 09:21:39 +02:00
misc.c
misc.h ubifs: misc.h: delete a duplicated word 2020-08-02 22:59:03 +02:00
orphan.c ubifs: Pass node length in all node dumping callers 2020-12-13 22:12:32 +01:00
recovery.c ubifs: Pass node length in all node dumping callers 2020-12-13 22:12:32 +01:00
replay.c ubifs: Fix spelling mistakes 2021-12-23 20:23:40 +01:00
sb.c ubifs: Default to zstd compression 2021-04-15 22:00:26 +02:00
scan.c ubifs: Pass node length in all node dumping callers 2020-12-13 22:12:32 +01:00
shrinker.c
super.c ubifs: Fix memory leak in alloc_wbufs() 2023-02-02 21:13:43 +01:00
sysfs.c ubifs: Fix memory leak in ubifs_sysfs_init() 2023-02-02 21:13:35 +01:00
tnc_commit.c treewide: use get_random_u32_below() instead of deprecated function 2022-11-18 02:15:15 +01:00
tnc_misc.c ubifs: Pass node length in all node dumping callers 2020-12-13 22:12:32 +01:00
tnc.c ubifs: Pass node length in all node dumping callers 2020-12-13 22:12:32 +01:00
ubifs-media.h ubifs: Add support for zstd compression. 2019-07-08 19:43:53 +02:00
ubifs.h ubifs: Fix build errors as symbol undefined 2023-02-02 21:13:34 +01:00
xattr.c ubifs: Fix AA deadlock when setting xattr for encrypted file 2022-09-21 11:32:58 +02:00