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author | Scott Bauer <scott.bauer@intel.com> | 2017-02-14 17:29:36 -0700 |
---|---|---|
committer | Jens Axboe <axboe@fb.com> | 2017-02-14 19:47:18 -0700 |
commit | e225c20eb0fd0b6657e640408f11ee392dc82b5b (patch) | |
tree | 16caa1d305159a1306478a58483278fe13d2e9b2 /block | |
parent | 24bff4d78a572d25fe2a0818f55bebda8a2d4709 (diff) | |
download | op-kernel-dev-e225c20eb0fd0b6657e640408f11ee392dc82b5b.zip op-kernel-dev-e225c20eb0fd0b6657e640408f11ee392dc82b5b.tar.gz |
Move stack parameters for sed_ioctl to prevent oversized stack with CONFIG_KASAN
When CONFIG_KASAN is enabled, compilation fails:
block/sed-opal.c: In function 'sed_ioctl':
block/sed-opal.c:2447:1: error: the frame size of 2256 bytes is larger than 2048 bytes [-Werror=frame-larger-than=]
Moved all the ioctl structures off the stack and dynamically allocate
using _IOC_SIZE()
Fixes: 455a7b238cd6 ("block: Add Sed-opal library")
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Scott Bauer <scott.bauer@intel.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block')
-rw-r--r-- | block/sed-opal.c | 133 |
1 files changed, 46 insertions, 87 deletions
diff --git a/block/sed-opal.c b/block/sed-opal.c index bf1406e..e95b8a5 100644 --- a/block/sed-opal.c +++ b/block/sed-opal.c @@ -2344,9 +2344,10 @@ bool opal_unlock_from_suspend(struct opal_dev *dev) } EXPORT_SYMBOL(opal_unlock_from_suspend); -int sed_ioctl(struct opal_dev *dev, unsigned int cmd, unsigned long ptr) +int sed_ioctl(struct opal_dev *dev, unsigned int cmd, void __user *arg) { - void __user *arg = (void __user *)ptr; + void *p; + int ret = -ENOTTY; if (!capable(CAP_SYS_ADMIN)) return -EACCES; @@ -2355,94 +2356,52 @@ int sed_ioctl(struct opal_dev *dev, unsigned int cmd, unsigned long ptr) return -ENOTSUPP; } - switch (cmd) { - case IOC_OPAL_SAVE: { - struct opal_lock_unlock lk_unlk; - - if (copy_from_user(&lk_unlk, arg, sizeof(lk_unlk))) - return -EFAULT; - return opal_save(dev, &lk_unlk); - } - case IOC_OPAL_LOCK_UNLOCK: { - struct opal_lock_unlock lk_unlk; - - if (copy_from_user(&lk_unlk, arg, sizeof(lk_unlk))) - return -EFAULT; - return opal_lock_unlock(dev, &lk_unlk); - } - case IOC_OPAL_TAKE_OWNERSHIP: { - struct opal_key opal_key; - - if (copy_from_user(&opal_key, arg, sizeof(opal_key))) - return -EFAULT; - return opal_take_ownership(dev, &opal_key); - } - case IOC_OPAL_ACTIVATE_LSP: { - struct opal_lr_act opal_lr_act; - - if (copy_from_user(&opal_lr_act, arg, sizeof(opal_lr_act))) - return -EFAULT; - return opal_activate_lsp(dev, &opal_lr_act); - } - case IOC_OPAL_SET_PW: { - struct opal_new_pw opal_pw; - - if (copy_from_user(&opal_pw, arg, sizeof(opal_pw))) - return -EFAULT; - return opal_set_new_pw(dev, &opal_pw); - } - case IOC_OPAL_ACTIVATE_USR: { - struct opal_session_info session; - - if (copy_from_user(&session, arg, sizeof(session))) - return -EFAULT; - return opal_activate_user(dev, &session); - } - case IOC_OPAL_REVERT_TPR: { - struct opal_key opal_key; - - if (copy_from_user(&opal_key, arg, sizeof(opal_key))) - return -EFAULT; - return opal_reverttper(dev, &opal_key); - } - case IOC_OPAL_LR_SETUP: { - struct opal_user_lr_setup lrs; + p = memdup_user(arg, _IOC_SIZE(cmd)); + if (IS_ERR(p)) + return PTR_ERR(p); - if (copy_from_user(&lrs, arg, sizeof(lrs))) - return -EFAULT; - return opal_setup_locking_range(dev, &lrs); - } - case IOC_OPAL_ADD_USR_TO_LR: { - struct opal_lock_unlock lk_unlk; - - if (copy_from_user(&lk_unlk, arg, sizeof(lk_unlk))) - return -EFAULT; - return opal_add_user_to_lr(dev, &lk_unlk); - } - case IOC_OPAL_ENABLE_DISABLE_MBR: { - struct opal_mbr_data mbr; - - if (copy_from_user(&mbr, arg, sizeof(mbr))) - return -EFAULT; - return opal_enable_disable_shadow_mbr(dev, &mbr); - } - case IOC_OPAL_ERASE_LR: { - struct opal_session_info session; - - if (copy_from_user(&session, arg, sizeof(session))) - return -EFAULT; - return opal_erase_locking_range(dev, &session); - } - case IOC_OPAL_SECURE_ERASE_LR: { - struct opal_session_info session; - - if (copy_from_user(&session, arg, sizeof(session))) - return -EFAULT; - return opal_secure_erase_locking_range(dev, &session); - } + switch (cmd) { + case IOC_OPAL_SAVE: + ret = opal_save(dev, p); + break; + case IOC_OPAL_LOCK_UNLOCK: + ret = opal_lock_unlock(dev, p); + break; + case IOC_OPAL_TAKE_OWNERSHIP: + ret = opal_take_ownership(dev, p); + break; + case IOC_OPAL_ACTIVATE_LSP: + ret = opal_activate_lsp(dev, p); + break; + case IOC_OPAL_SET_PW: + ret = opal_set_new_pw(dev, p); + break; + case IOC_OPAL_ACTIVATE_USR: + ret = opal_activate_user(dev, p); + break; + case IOC_OPAL_REVERT_TPR: + ret = opal_reverttper(dev, p); + break; + case IOC_OPAL_LR_SETUP: + ret = opal_setup_locking_range(dev, p); + break; + case IOC_OPAL_ADD_USR_TO_LR: + ret = opal_add_user_to_lr(dev, p); + break; + case IOC_OPAL_ENABLE_DISABLE_MBR: + ret = opal_enable_disable_shadow_mbr(dev, p); + break; + case IOC_OPAL_ERASE_LR: + ret = opal_erase_locking_range(dev, p); + break; + case IOC_OPAL_SECURE_ERASE_LR: + ret = opal_secure_erase_locking_range(dev, p); + break; default: pr_warn("No such Opal Ioctl %u\n", cmd); } - return -ENOTTY; + + kfree(p); + return ret; } EXPORT_SYMBOL_GPL(sed_ioctl); |