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authorMark Lord <lkml@rtr.ca>2008-03-28 19:05:25 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-03-30 14:55:49 -0700
commita9edadbf790d72adf6ebed476cb5caf7743e7e4a (patch)
tree168c9e70f2172e408514b643c2282a6c87744b24
parenteb08b6b973cb91311431c6eea3cc232b97152a84 (diff)
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 <mlord@pobox.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--lib/kobject_uevent.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/kobject_uevent.c b/lib/kobject_uevent.c
index 5a402e2982af..5b6d7f6956b9 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)

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