| commit | d70ef22892ed6c066e51e118b225923c9b74af34 | |
| author | Jiri Slaby <jslaby@suse.cz> | |
| Thu, 30 Nov 2017 14:35:44 +0000 (30 15:35 +0100) | ||
| committer | Linus Torvalds <torvalds@linux-foundation.org> | |
| Sun, 10 Dec 2017 20:50:57 +0000 (10 12:50 -0800) | ||
| tree | 8a650ea3b1fe83e418607e5c8c40f7ec24e1eef8 | treesnapshot (tar.gz zip) |
| parent | 51090c5d6de08cfc86b2d861775dedddd9a2c023 | commitdiff |
futex: futex_wake_op, fix sign_extend32 sign bits
sign_extend32 counts the sign bit parameter from 0, not from 1. So we
have to use "11" for 12th bit, not "12".
This mistake means we have not allowed negative op and cmp args since
commit 30d6e0a4190d ("futex: Remove duplicated code and fix undefined
behaviour") till now.
Fixes: 30d6e0a4190d ("futex: Remove duplicated code and fix undefined behaviour")
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Darren Hart <dvhart@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
sign_extend32 counts the sign bit parameter from 0, not from 1. So we
have to use "11" for 12th bit, not "12".
This mistake means we have not allowed negative op and cmp args since
commit 30d6e0a4190d ("futex: Remove duplicated code and fix undefined
behaviour") till now.
Fixes: 30d6e0a4190d ("futex: Remove duplicated code and fix undefined behaviour")
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Darren Hart <dvhart@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| kernel/futex.c | diffblobblamehistory |