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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2010-10-25 18:10:21 +0400 |
|---|---|---|
| committer | Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> | 2010-10-25 18:10:17 +0400 |
| commit | a20852d2b7ca3c6e7b232eecf09631b66dde2a46 (patch) | |
| tree | 436305042c18b77e6dabdeaac5476bf27a1f0e09 | |
| parent | bf2106ae114807772506e62cbf8a7d8e2c5403a1 (diff) | |
| download | linux-a20852d2b7ca3c6e7b232eecf09631b66dde2a46.tar.xz | |
[S390] cmm: fix crash on case conversion
When the cmm module is compiled into the kernel it will crash when
writing to the R/O data section.
Reason is the lower to upper case conversion of the "sender" module
parameter which ignored the fact that the pointer is preinitialized.
Introduced with 41b42876 "cmm, smsgiucv_app: convert sender to
uppercase"
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
| -rw-r--r-- | arch/s390/mm/cmm.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/s390/mm/cmm.c b/arch/s390/mm/cmm.c index a9550dca3e4b..c66ffd8dbbb7 100644 --- a/arch/s390/mm/cmm.c +++ b/arch/s390/mm/cmm.c @@ -23,7 +23,10 @@ #include <asm/pgalloc.h> #include <asm/diag.h> -static char *sender = "VMRMSVM"; +#ifdef CONFIG_CMM_IUCV +static char *cmm_default_sender = "VMRMSVM"; +#endif +static char *sender; module_param(sender, charp, 0400); MODULE_PARM_DESC(sender, "Guest name that may send SMSG messages (default VMRMSVM)"); @@ -440,6 +443,8 @@ static int __init cmm_init(void) int len = strlen(sender); while (len--) sender[len] = toupper(sender[len]); + } else { + sender = cmm_default_sender; } rc = smsg_register_callback(SMSG_PREFIX, cmm_smsg_target); |