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Commit 580b23c9 authored by Paul Lawrence's avatar Paul Lawrence
Browse files

ANDROID: Incremental fs: Fix compound page usercopy crash 



Bug: 153560805
Test: incfs_test passes on qemu and Pixel 4
Signed-off-by: default avatarPaul Lawrence <paullawrence@google.com>
Change-Id: I1b55341e4e4247a74f3f539b9d190fef0ca409b8
parent 06a024d4

fs/incfs/data_mgmt.c

+2 −1
Original line number Diff line number Diff line
@@ -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;

fs/incfs/vfs.c

+4 −3
Original line number Diff line number Diff line
@@ -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;