From a9edadbf790d72adf6ebed476cb5caf7743e7e4a Mon Sep 17 00:00:00 2001 From: Mark Lord Date: Fri, 28 Mar 2008 19:05:25 -0400 Subject: [PATCH] fix uevent action-string regression Mark Lord wrote: > > On boot, syslog is flooded with "uevent: unsupported action-string;" messages. .. > Mar 28 14:43:29 shrimp kernel: tty ptyqd: uevent: unsupported > action-string; this will be ignored in a future kernel version > Mar 28 14:43:29 shrimp kernel: tty ptyqe: uevent: unsupported > action-string; this will be ignored in a future kernel version > Mar 28 14:43:29 shrimp kernel: tty ptyqf: uevent: unsupported > action-string; this will be ignored in a future kernel version > Mar 28 14:43:29 shrimp kernel: tty ptyr0: uevent: unsupported > action-string; this will be ignored in a future kernel version .. These messages are a regression compared with 2.6.24, which did not flood the syslog with them. The actual underlying problem was introduced in 2.6.23, when somebody made the string parsing no longer accept nul-terminated strings as a valid input to store_uevent(). Eg. "add\0" was valid prior to 2.6.23, where the code regressed to require "add" without the '\0'. This patch fixes the 2.6.23 / 2.6.24 regressions, by having the code once again tolerate the trailing '\0', if present. According to GregKH, this mainly affects older Ubuntu systems, such as the one I have here that requires this fix. Signed-off-by: Mark Lord Signed-off-by: Linus Torvalds --- lib/kobject_uevent.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/kobject_uevent.c b/lib/kobject_uevent.c index 5a402e2982a..5b6d7f6956b 100644 --- a/lib/kobject_uevent.c +++ b/lib/kobject_uevent.c @@ -55,7 +55,7 @@ int kobject_action_type(const char *buf, size_t count, enum kobject_action action; int ret = -EINVAL; - if (count && buf[count-1] == '\n') + if (count && (buf[count-1] == '\n' || buf[count-1] == '\0')) count--; if (!count) -- 2.41.1