Messages in this thread | | | Date | Mon, 14 Jun 2021 20:09:30 +0000 | From | Al Viro <> | Subject | Re: [PATCH] pstore/blk: Use the normal block device I/O path |
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On Mon, Jun 14, 2021 at 01:04:21PM -0700, Kees Cook wrote:
> static ssize_t psblk_generic_blk_write(const char *buf, size_t bytes, > loff_t pos) > {
> /* Console/Ftrace backend may handle buffer until flush dirty zones */ > if (in_interrupt() || irqs_disabled()) > return -EBUSY;
> + return kernel_write(psblk_file, buf, bytes, &pos);
In which locking environments could that be called? The checks above look like that thing could be called from just about any context; could that happen when the caller is holding a page locked?
IOW, what are those checks really trying to do?
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