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| author | Karol Swietlicki <magotari@gmail.com> | 2008-02-04 22:31:25 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-05 09:44:31 -0800 |
| commit | cc0be0fb3fd4bd2c363ef1b5c968cd6f2ce478cf (patch) | |
| tree | 19a4a1127fed020ec1c08264117517e49ddad0ea /arch/um/drivers/mconsole_kern.c | |
| parent | ab26a5276c1b0945c3281a73b3a89d025906c880 (diff) | |
| download | linux-stable-cc0be0fb3fd4bd2c363ef1b5c968cd6f2ce478cf.tar.gz linux-stable-cc0be0fb3fd4bd2c363ef1b5c968cd6f2ce478cf.tar.bz2 linux-stable-cc0be0fb3fd4bd2c363ef1b5c968cd6f2ce478cf.zip | |
uml: fix infinite mconsole loop
This patch takes care of a problem with the stopping code.
The function inside the while condition returns 0 to signify a problem. A
problem could be for example a bad command or a bad version of the mconsole
client. A bad command would terminate the stopping loop and resume the
kernel. This is a problem.
A better solution is to make the loop infinite and don't leave it until we are
explicitly told to.
Signed-off-by: Karol Swietlicki <magotari@gmail.com>
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/um/drivers/mconsole_kern.c')
| -rw-r--r-- | arch/um/drivers/mconsole_kern.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/um/drivers/mconsole_kern.c b/arch/um/drivers/mconsole_kern.c index c953e1477be4..949037e92a7b 100644 --- a/arch/um/drivers/mconsole_kern.c +++ b/arch/um/drivers/mconsole_kern.c @@ -305,7 +305,9 @@ void mconsole_stop(struct mc_request *req) deactivate_fd(req->originating_fd, MCONSOLE_IRQ); os_set_fd_block(req->originating_fd, 1); mconsole_reply(req, "stopped", 0, 0); - while (mconsole_get_request(req->originating_fd, req)) { + for (;;) { + if (!mconsole_get_request(req->originating_fd, req)) + continue; if (req->cmd->handler == mconsole_go) break; if (req->cmd->handler == mconsole_stop) { |