Messages in this thread | | | Date | Thu, 21 Mar 2013 07:22:54 -0700 | From | "Paul E. McKenney" <> | Subject | [GIT PULL tip/core/urgent] Fix for hlist_entry_safe() regression |
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[Reposting with corrected subject line.]
Hello, Ingo,
This series contains a single commit that fixes a regression in hlist_entry_safe(). This macro references its argument twice, which can cause NULL-pointer errors. This commit applies a gcc statement expression, creating a temporary variable to avoid the double reference. This has been posted to LKML at https://lkml.org/lkml/2013/3/9/75.
Kudos to CAI Qian, whose testing uncovered this, to Eric Dumazet, who spotted root cause, and to Li Zefan, who tested this commit.
This commit is available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git rcu/urgent
Thanx, Paul
---------------------------------------------------------------- Paul E. McKenney (1): list: Fix double fetch of pointer in hlist_entry_safe()
include/linux/list.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
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