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(parent: af432eb) | patch
softlockup: fix potential race in hung_task when resetting timeout
authorMandeep Singh Baines <msb@google.com>
Sat, 17 Jan 2009 18:31:48 +0000 (10:31 -0800)
committerIngo Molnar <mingo@elte.hu>
Sun, 18 Jan 2009 18:20:17 +0000 (19:20 +0100)
commit603a148f434742fff08273207ffa44176cad13a1
treee0c051efd07a7b51390e13169f4c78a29c676fc1tree | snapshot
parentaf432eb1cc3178ec7109aca2283aafb1c12ccac1commit | diff
softlockup: fix potential race in hung_task when resetting timeout

Impact: fix potential false panic

A potential race exists if sysctl_hung_task_timeout_secs is reset to 0
while inside check_hung_uniterruptible_tasks(). If check_task() is
entered, a comparison with 0 will result in a false hung_task being
detected.

If sysctl_hung_task_panic is set, the system will panic.

Signed-off-by: Mandeep Singh Baines <msb@google.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
kernel/hung_task.c diff | blob | history
Domain: System / Kernel;