It makes little sense for fsmount() to output the warning message when
mount_too_revealing() is violated to kmsg. Instead, the warning should
be output (with a "VFS" prefix) to the fscontext log. In addition,
include the same log message for mount_too_revealing() when doing a
regular mount for consistency.
With the newest fsopen()-based mount(8) from util-linux, the error
messages now look like
# mount -t proc proc /tmp
mount: /tmp: fsmount() failed: VFS: Mount too revealing.
dmesg(1) may have more information after failed mount system call.
which could finally result in mount_too_revealing() errors being easier
for users to detect and understand.
Signed-off-by: Aleksa Sarai <cyphar@xxxxxxxxxx>
---
Aleksa Sarai (2):
fscontext: add custom-prefix log helpers
vfs: output mount_too_revealing() errors to fscontext
fs/namespace.c | 6 ++++--
include/linux/fs_context.h | 18 ++++++++++++++----
2 files changed, 18 insertions(+), 6 deletions(-)
---
base-commit: 66639db858112bf6b0f76677f7517643d586e575
change-id: 20250805-errorfc-mount-too-revealing-5d9f670ba770
Best regards,
--
Aleksa Sarai <cyphar@xxxxxxxxxx>
