Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [ 065/218] oprofile, s390: Fix uninitialized memory access when writing to oprofilefs | Date | Fri, 28 Sep 2012 13:14:42 -0700 |
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3.4-stable review patch. If anyone has any objections, please let me know.
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From: Robert Richter <robert.richter@amd.com>
commit 81ff3478d9ba7f0b48b0abef740e542fd83adf79 upstream.
If oprofilefs_ulong_from_user() is called with count equals zero, *val remains unchanged. Depending on the implementation it might be uninitialized. Fixing users of oprofilefs_ulong_ from_user().
We missed these s390 changes with:
913050b oprofile: Fix uninitialized memory access when writing to writing to oprofilefs
Signed-off-by: Robert Richter <robert.richter@amd.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- arch/s390/oprofile/init.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-)
--- a/arch/s390/oprofile/init.c +++ b/arch/s390/oprofile/init.c @@ -171,7 +171,7 @@ static ssize_t hw_interval_write(struct if (*offset) return -EINVAL; retval = oprofilefs_ulong_from_user(&val, buf, count); - if (retval) + if (retval <= 0) return retval; if (val < oprofile_min_interval) oprofile_hw_interval = oprofile_min_interval; @@ -214,7 +214,7 @@ static ssize_t hwsampler_zero_write(stru return -EINVAL; retval = oprofilefs_ulong_from_user(&val, buf, count); - if (retval) + if (retval <= 0) return retval; if (val != 0) return -EINVAL; @@ -245,7 +245,7 @@ static ssize_t hwsampler_kernel_write(st return -EINVAL; retval = oprofilefs_ulong_from_user(&val, buf, count); - if (retval) + if (retval <= 0) return retval; if (val != 0 && val != 1) @@ -280,7 +280,7 @@ static ssize_t hwsampler_user_write(stru return -EINVAL; retval = oprofilefs_ulong_from_user(&val, buf, count); - if (retval) + if (retval <= 0) return retval; if (val != 0 && val != 1) @@ -319,7 +319,7 @@ static ssize_t timer_enabled_write(struc return -EINVAL; retval = oprofilefs_ulong_from_user(&val, buf, count); - if (retval) + if (retval <= 0) return retval; if (val != 0 && val != 1)
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