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ANDROID: Incremental fs: Fix compound page usercopy crash

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Bug: 153560805
Test: incfs_test passes on qemu and Pixel 4
Signed-off-by: Paul Lawrence <paullawrence@google.com>
Change-Id: I1b55341e4e4247a74f3f539b9d190fef0ca409b8
Git-commit: 580b23c95a
Git-repo: https://android.googlesource.com/kernel/common/
Signed-off-by: Sayali Lokhande <sayalil@codeaurora.org>
This commit is contained in:
Paul Lawrence
2020-04-07 14:48:14 -07:00
committed by Blagovest Kolenichev
parent 46c1f3f598
commit 67b3fcb242
2 changed files with 6 additions and 4 deletions
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3
fs/incfs/data_mgmt.c
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@@ -507,7 +507,8 @@ int incfs_get_filled_blocks(struct data_file *df,
return 0;
}
bme = kzalloc(sizeof(*bme) * READ_BLOCKMAP_ENTRIES, GFP_NOFS);
bme = kzalloc(sizeof(*bme) * READ_BLOCKMAP_ENTRIES,
GFP_NOFS | __GFP_COMP);
if (!bme)
return -ENOMEM;

7
fs/incfs/vfs.c
View File

@@ -858,7 +858,7 @@ static struct mem_range incfs_copy_signature_info_from_user(u8 __user *original,
if (size > INCFS_MAX_SIGNATURE_SIZE)
return range(ERR_PTR(-EFAULT), 0);
result = kzalloc(size, GFP_NOFS);
result = kzalloc(size, GFP_NOFS | __GFP_COMP);
if (!result)
return range(ERR_PTR(-ENOMEM), 0);
@@ -1296,7 +1296,8 @@ static long ioctl_fill_blocks(struct file *f, void __user *arg)
return -EFAULT;
usr_fill_block_array = u64_to_user_ptr(fill_blocks.fill_blocks);
data_buf = (u8 *)__get_free_pages(GFP_NOFS, get_order(data_buf_size));
data_buf = (u8 *)__get_free_pages(GFP_NOFS | __GFP_COMP,
get_order(data_buf_size));
if (!data_buf)
return -ENOMEM;
@@ -1411,7 +1412,7 @@ static long ioctl_read_file_signature(struct file *f, void __user *arg)
if (sig_buf_size > INCFS_MAX_SIGNATURE_SIZE)
return -E2BIG;
sig_buffer = kzalloc(sig_buf_size, GFP_NOFS);
sig_buffer = kzalloc(sig_buf_size, GFP_NOFS | __GFP_COMP);
if (!sig_buffer)
return -ENOMEM;