| commit | 8d4bd0ed0439dfc780aab801a085961925ed6838 | |
| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | |
| Tue, 8 Sep 2015 13:25:39 +0000 (8 15:25 +0200) | ||
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | |
| Thu, 17 Sep 2015 11:43:42 +0000 (17 13:43 +0200) | ||
| tree | 7faf6dc07fc2752cdbc1d5edc9d8faf202d60459 | treesnapshot (tar.gz zip) |
| parent | 9380cf5a884e237fc0e2571d5adf0b43bb4412c8 | commitdiff |
s390/compat: correct uc_sigmask of the compat signal frame
The uc_sigmask in the ucontext structure is an array of words to keep
the 64 signal bits (or 1024 if you ask glibc but the kernel sigset_t
only has 64 bits).
For 64 bit the sigset_t contains a single 8 byte word, but for 31 bit
there are two 4 byte words. The compat signal handler code uses a
simple copy of the 64 bit sigset_t to the 31 bit compat_sigset_t.
As s390 is a big-endian architecture this is incorrect, the two words
in the 31 bit sigset_t array need to be swapped.
Cc: <stable@vger.kernel.org>
Reported-by: Stefan Liebler <stli@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
The uc_sigmask in the ucontext structure is an array of words to keep
the 64 signal bits (or 1024 if you ask glibc but the kernel sigset_t
only has 64 bits).
For 64 bit the sigset_t contains a single 8 byte word, but for 31 bit
there are two 4 byte words. The compat signal handler code uses a
simple copy of the 64 bit sigset_t to the 31 bit compat_sigset_t.
As s390 is a big-endian architecture this is incorrect, the two words
in the 31 bit sigset_t array need to be swapped.
Cc: <stable@vger.kernel.org>
Reported-by: Stefan Liebler <stli@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| arch/s390/kernel/compat_signal.c | diffblobblamehistory |