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| author |   Aurelien Jarno <aurelien@aurel32.net> | 2017-05-02 13:00:12 +0000 |
|---|---|---|
| committer |   Rich Felker <dalias@libc.org> | 2018-04-12 19:47:50 -0400 |
| commit | 9b7e30ab975334448dc4c82941a48a3685a7642b (patch) | |
| tree | 9f200fb4ccd0436507a3abed99141828ff9f5c97 /arch/sh/kernel | |
| parent | Linux 4.16 (diff) | |
| download | linux-dev-9b7e30ab975334448dc4c82941a48a3685a7642b.tar.xz linux-dev-9b7e30ab975334448dc4c82941a48a3685a7642b.zip | |
sh: fix futex FUTEX_OP_SET op on userspace addresses
Commit 00b73d8d1b71 ("sh: add working futex atomic ops on userspace
addresses for smp") changed the futex_atomic_op_inuser function to
use a loop. In case of the FUTEX_OP_SET op with a userspace address
containing a value different of 0, this loop is an endless loop.
Fix that by loading the value of oldval from the userspace before doing
the cmpxchg op, also for the FUTEX_OP_SET case.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Rich Felker <dalias@libc.org>
Diffstat (limited to 'arch/sh/kernel')
0 files changed, 0 insertions, 0 deletions