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authorChao Yu <yuchao0@huawei.com>2019-03-05 17:52:33 +0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-04-20 09:17:05 +0200
commitb5f51f7abb4373b9cb5677aba23ec45e13f21b02 (patch)
tree5ab4e22109b5849e8b191ab6b35574850eadf1f1
parentc55d13d94f8ced4f3fc585b9e2ee12d9df5f3fc4 (diff)
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f2fs: fix to use kvfree instead of kzfree
[ Upstream commit 2a6a7e722e7a78d774ce02b847c5b183a3ff2672 ] As Jiqun Li reported in bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=202747 System can panic due to using wrong allocate/free function pair in xattr interface: - use kvmalloc to allocate memory - use kzfree to free memory Let's fix to use kvfree instead of kzfree, BTW, we are safe to get rid of kzfree, since there is no such confidential data stored as xattr, we don't need to zero it before free memory. Fixes: 5222595d093e ("f2fs: use kvmalloc, if kmalloc is failed") Reported-by: Jiqun Li <jiqun.li@unisoc.com> Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
-rw-r--r--fs/f2fs/xattr.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c
index 73b92985198b..6b6fe6431a64 100644
--- a/fs/f2fs/xattr.c
+++ b/fs/f2fs/xattr.c
@@ -347,7 +347,7 @@ check:
*base_addr = txattr_addr;
return 0;
out:
- kzfree(txattr_addr);
+ kvfree(txattr_addr);
return err;
}
@@ -390,7 +390,7 @@ static int read_all_xattrs(struct inode *inode, struct page *ipage,
*base_addr = txattr_addr;
return 0;
fail:
- kzfree(txattr_addr);
+ kvfree(txattr_addr);
return err;
}
@@ -517,7 +517,7 @@ int f2fs_getxattr(struct inode *inode, int index, const char *name,
}
error = size;
out:
- kzfree(base_addr);
+ kvfree(base_addr);
return error;
}
@@ -563,7 +563,7 @@ ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
}
error = buffer_size - rest;
cleanup:
- kzfree(base_addr);
+ kvfree(base_addr);
return error;
}
@@ -694,7 +694,7 @@ static int __f2fs_setxattr(struct inode *inode, int index,
if (!error && S_ISDIR(inode->i_mode))
set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_CP);
exit:
- kzfree(base_addr);
+ kvfree(base_addr);
return error;
}