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Date: Sat, 9 Jul 2011 14:00:26 +0900 From: Akinobu Mita <akinobu.mita@...il.com> To: linux-kernel@...r.kernel.org, akpm@...ux-foundation.org Cc: Akinobu Mita <akinobu.mita@...il.com>, Greg Kroah-Hartman <gregkh@...e.de> Subject: [PATCH] libfs: fix simple_attr_write on 32bit machine Assume that /sys/kernel/debug/dummy64 is debugfs file created by debugfs_create_x64(). # cd /sys/kernel/debug # echo 0x1234567812345678 > dummy64 # cat dummy64 0x0000000012345678 # echo 0x80000000 > dummy64 # cat dummy64 0xffffffff80000000 The value more than INT_MAX cannot be written to the debugfs file created by debugfs_create_u64 or debugfs_create_x64 on 32bit machine. Because simple_attr_write() uses simple_strtol() for the conversion. To fix this, use simple_strtoll() instead. Signed-off-by: Akinobu Mita <akinobu.mita@...il.com> Cc: Greg Kroah-Hartman <gregkh@...e.de> --- fs/libfs.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/fs/libfs.c b/fs/libfs.c index c88eab5..275ca474 100644 --- a/fs/libfs.c +++ b/fs/libfs.c @@ -822,7 +822,7 @@ ssize_t simple_attr_write(struct file *file, const char __user *buf, goto out; attr->set_buf[size] = '\0'; - val = simple_strtol(attr->set_buf, NULL, 0); + val = simple_strtoll(attr->set_buf, NULL, 0); ret = attr->set(attr->data, val); if (ret == 0) ret = len; /* on success, claim we got the whole input */ -- 1.7.4.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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