The patch titled
drivers/scsi/mpt2sas/mpt2sas_ctl.c: fix unbounded copy_to_user()
has been added to the -mm tree. Its filename is
drivers-scsi-mpt2sas-mpt2sas_ctlc-fix-unbounded-copy_to_user.patch
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*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: drivers/scsi/mpt2sas/mpt2sas_ctl.c: fix unbounded copy_to_user()
From: Andrew Morton <[email protected]>
In _ctl_diag_read_buffer() on line 2019, user-supplied values are
used to determine the size of a copy_to_user() as well as the offset
into the buffer to be read, with no bounds checking. I'm not familiar
with this code, so I'm not sure what checks would be appropriate, but
letting unprivileged users read arbitrary kernel memory probably isn't
intended.
Reported-by: Dan Rosenberg <[email protected]>
Cc: Eric Moore <[email protected]>
Cc: Desai Kashyap <[email protected]>
Cc: Eugene Teo <[email protected]>
Cc: James Bottomley <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---
drivers/scsi/mpt2sas/mpt2sas_ctl.c | 3 +++
1 file changed, 3 insertions(+)
diff -puN
drivers/scsi/mpt2sas/mpt2sas_ctl.c~drivers-scsi-mpt2sas-mpt2sas_ctlc-fix-unbounded-copy_to_user
drivers/scsi/mpt2sas/mpt2sas_ctl.c
---
a/drivers/scsi/mpt2sas/mpt2sas_ctl.c~drivers-scsi-mpt2sas-mpt2sas_ctlc-fix-unbounded-copy_to_user
+++ a/drivers/scsi/mpt2sas/mpt2sas_ctl.c
@@ -2011,6 +2011,9 @@ _ctl_diag_read_buffer(void __user *arg,
"offset(%d), sz(%d)\n", ioc->name, __func__,
diag_data, karg.starting_offset, karg.bytes_to_read));
+ if (karg.bytes_to_read != sizeof(uarg->diagnostic_data))
+ return -EINVAL;
+
if (copy_to_user((void __user *)uarg->diagnostic_data,
diag_data, karg.bytes_to_read)) {
printk(MPT2SAS_ERR_FMT "%s: Unable to write "
_
Patches currently in -mm which might be from [email protected] are
linux-next.patch
next-remove-localversion.patch
i-need-old-gcc.patch
arch-alpha-kernel-systblss-remove-debug-check.patch
drivers-i2c-busses-i2c-designware-corec-needs-delayh.patch
fs-partitions-ldmc-fix-oops-caused-by-corrupted-partition-table-checkpatch-fixes.patch
mm-add-vm-counters-for-transparent-hugepages.patch
drivers-scsi-mpt2sas-mpt2sas_ctlc-fix-unbounded-copy_to_user.patch
arch-x86-include-asm-delayh-fix-udelay-and-ndelay-for-8-bit-args.patch
drivers-gpu-drm-radeon-atomc-fix-warning.patch
leds-route-kbd-leds-through-the-generic-leds-layer.patch
backlight-add-backlight-type-fix.patch
backlight-add-backlight-type-fix-fix.patch
drivers-message-fusion-mptsasc-fix-warning.patch
drbd-fix-warning.patch
mm.patch
mm-nommu-sort-mm-mmap-list-properly-fix.patch
frv-duplicate-output_buffer-of-e03-checkpatch-fixes.patch
hpet-factor-timer-allocate-from-open.patch
arch-alpha-include-asm-ioh-s-extern-inline-static-inline.patch
init-calibratec-fix-for-critical-bogomips-intermittent-calculation-failure-checkpatch-fixes.patch
init-calibratec-fix-for-critical-bogomips-intermittent-calculation-failure-fix.patch
lru_cache-use-correct-type-in-sizeof-for-allocation-fix.patch
lib-hexdumpc-make-hex2bin-return-the-updated-src-address.patch
fs-binfmt_miscc-use-kernels-hex_to_bin-method-fix.patch
fs-binfmt_miscc-use-kernels-hex_to_bin-method-fix-fix.patch
drivers-tty-vt-vt_ioctlc-repair-insane-expression.patch
drivers-rtc-rtc-mrstc-use-release_mem_region-after-request_mem_region-fix.patch
rtc-driver-for-pt7c4338-chip-checkpatch-fixes.patch
rtc-driver-for-pt7c4338-chip-fix.patch
mm-move-enum-vm_event_item-into-a-standalone-header-file.patch
add-the-pagefault-count-into-memcg-stats-fix.patch
scatterlist-new-helper-functions.patch
scatterlist-new-helper-functions-update-fix.patch
kexec-remove-kmsg_dump_kexec-fix.patch
journal_add_journal_head-debug.patch
mutex-subsystem-synchro-test-module-fix.patch
slab-leaks3-default-y.patch
put_bh-debug.patch
memblock-add-input-size-checking-to-memblock_find_region.patch
memblock-add-input-size-checking-to-memblock_find_region-fix.patch
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