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| author | Tony Luck <tony.luck@intel.com> | 2020-05-28 12:49:05 -0700 |
|---|---|---|
| committer | Ard Biesheuvel <ardb@kernel.org> | 2020-06-15 14:38:56 +0200 |
| commit | 4353f03317fd3eb0bd803b61bdb287b68736a728 (patch) | |
| tree | f42a3901f5c168a091da25d3ad82f8584be2d36f /fs/efivarfs | |
| parent | 2096721f1577b51b574fa06a7d91823dffe7267a (diff) | |
| download | linux-4353f03317fd3eb0bd803b61bdb287b68736a728.tar.gz linux-4353f03317fd3eb0bd803b61bdb287b68736a728.tar.bz2 linux-4353f03317fd3eb0bd803b61bdb287b68736a728.zip | |
efivarfs: Don't return -EINTR when rate-limiting reads
Applications that read EFI variables may see a return
value of -EINTR if they exceed the rate limit and a
signal delivery is attempted while the process is sleeping.
This is quite surprising to the application, which probably
doesn't have code to handle it.
Change the interruptible sleep to a non-interruptible one.
Reported-by: Lennart Poettering <mzxreary@0pointer.de>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Link: https://lore.kernel.org/r/20200528194905.690-3-tony.luck@intel.com
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Diffstat (limited to 'fs/efivarfs')
| -rw-r--r-- | fs/efivarfs/file.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/fs/efivarfs/file.c b/fs/efivarfs/file.c index 4b8bc4560d70..feaa5e182b7b 100644 --- a/fs/efivarfs/file.c +++ b/fs/efivarfs/file.c @@ -73,10 +73,8 @@ static ssize_t efivarfs_file_read(struct file *file, char __user *userbuf, ssize_t size = 0; int err; - while (!__ratelimit(&file->f_cred->user->ratelimit)) { - if (!msleep_interruptible(50)) - return -EINTR; - } + while (!__ratelimit(&file->f_cred->user->ratelimit)) + msleep(50); err = efivar_entry_size(var, &datasize); |