diff options
| author | Hendrik Brueckner <brueckner@linux.vnet.ibm.com> | 2015-02-09 16:47:00 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2015-02-10 16:39:05 +0100 |
| commit | 6a039eab53c01a58bfff95c78fc800ca7de27c77 (patch) | |
| tree | 5b5cc1f503f91db9aaf9b8c1907567e722313e79 /arch/s390 | |
| parent | a178220df3a55c3ec46c2c2f0788a377acdb79c3 (diff) | |
s390/process: free vx save area when releasing tasks
If a task uses vector registers, a save area is allocated to save/restore
register states. Free the save area when releasing the task.
Found the Memory leak with kmemleak:
unreferenced object 0x72885e00 (size 512):
comm "vx-test", pid 26123, jiffies 4294945635 (age 256.810s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 01 db 71 06 41 .............q.A
00 00 00 00 00 00 00 00 24 f7 a9 a7 51 94 79 bb ........$...Q.y.
backtrace:
[<00000000002d1c8a>] kmem_cache_alloc_trace+0x272/0x3d0
[<00000000001014ac>] alloc_vector_registers+0x54/0x138
[<00000000001017c8>] data_exception+0x158/0x1b0
[<00000000008b551e>] pgm_check_handler+0x13e/0x180
[<00000000800008b6>] 0x800008b6
Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/kernel/process.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c index 2c1eb4f3aaf5..13fc0978ca7e 100644 --- a/arch/s390/kernel/process.c +++ b/arch/s390/kernel/process.c @@ -79,6 +79,14 @@ void release_thread(struct task_struct *dead_task) { } +#ifdef CONFIG_64BIT +void arch_release_task_struct(struct task_struct *tsk) +{ + if (tsk->thread.vxrs) + kfree(tsk->thread.vxrs); +} +#endif + int copy_thread(unsigned long clone_flags, unsigned long new_stackp, unsigned long arg, struct task_struct *p) { |