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Zizhi Wo 5a8a58911f cachefiles: Fix missing pos updates in cachefiles_ondemand_fd_write_iter()

[ Upstream commit 56f4856b42 ]

In the erofs on-demand loading scenario, read and write operations are
usually delivered through "off" and "len" contained in read req in user
mode. Naturally, pwrite is used to specify a specific offset to complete
write operations.

However, if the write(not pwrite) syscall is called multiple times in the
read-ahead scenario, we need to manually update ki_pos after each write
operation to update file->f_pos.

This step is currently missing from the cachefiles_ondemand_fd_write_iter
function, added to address this issue.

Fixes: c838305450 ("cachefiles: notify the user daemon when looking up cookie")
Signed-off-by: Zizhi Wo <wozizhi@huawei.com>
Link: https://lore.kernel.org/r/20241107110649.3980193-3-wozizhi@huawei.com
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2024-12-05 14:01:14 +01:00

cache.c

cachefiles: fix slab-use-after-free in cachefiles_withdraw_cookie()

2024-07-03 10:36:15 +02:00

daemon.c

Merge patch series "cachefiles: random bugfixes"

2024-07-05 18:40:40 +02:00

error_inject.c

cachefiles: Remove the now superfluous sentinel element from ctl_table array

2023-12-28 04:57:57 -08:00

interface.c

cachefiles: extract ondemand info field from cachefiles_object