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authorQuanyang Wang <quanyang.wang@windriver.com>2020-01-14 08:43:11 +0300
committerRichard Weinberger <richard@nod.at>2020-01-20 01:22:57 +0300
commitff90bdfb206e49c8b418811efbdd0c77380fa8c2 (patch)
treef07f2d0be8e1d4db7d0cf4371206628cfe43fabc
parent155fc6ba488a8bdfd1d3be3d7ba98c9cec2b2429 (diff)
downloadlinux-ff90bdfb206e49c8b418811efbdd0c77380fa8c2.tar.xz
ubifs: Fix memory leak from c->sup_node
The c->sup_node is allocated in function ubifs_read_sb_node but is not freed. This will cause memory leak as below: unreferenced object 0xbc9ce000 (size 4096): comm "mount", pid 500, jiffies 4294952946 (age 315.820s) hex dump (first 32 bytes): 31 18 10 06 06 7b f1 11 02 00 00 00 00 00 00 00 1....{.......... 00 10 00 00 06 00 00 00 00 00 00 00 08 00 00 00 ................ backtrace: [<d1c503cd>] ubifs_read_superblock+0x48/0xebc [<a20e14bd>] ubifs_mount+0x974/0x1420 [<8589ecc3>] legacy_get_tree+0x2c/0x50 [<5f1fb889>] vfs_get_tree+0x28/0xfc [<bbfc7939>] do_mount+0x4f8/0x748 [<4151f538>] ksys_mount+0x78/0xa0 [<d59910a9>] ret_fast_syscall+0x0/0x54 [<1cc40005>] 0x7ea02790 Free it in ubifs_umount and in the error path of mount_ubifs. Fixes: fd6150051bec ("ubifs: Store read superblock node") Signed-off-by: Quanyang Wang <quanyang.wang@windriver.com> Signed-off-by: Richard Weinberger <richard@nod.at>
-rw-r--r--fs/ubifs/super.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 5e1e8ec0589e..7fc2f3f07c16 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -1599,6 +1599,7 @@ out_free:
vfree(c->ileb_buf);
vfree(c->sbuf);
kfree(c->bottom_up_buf);
+ kfree(c->sup_node);
ubifs_debugging_exit(c);
return err;
}
@@ -1641,6 +1642,7 @@ static void ubifs_umount(struct ubifs_info *c)
vfree(c->ileb_buf);
vfree(c->sbuf);
kfree(c->bottom_up_buf);
+ kfree(c->sup_node);
ubifs_debugging_exit(c);
}