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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-04 05:57:49 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-04 05:57:49 +0300 |
| commit | 7a53eea1f7b527fd3b6d7ca992914840981afe99 (patch) | |
| tree | 35dfd7e14d5c44ae2d34e470aaaa68dbfec39324 /drivers/char/mem.c | |
| parent | 597f03f9d133e9837d00965016170271d4f87dcf (diff) | |
| parent | c9fef1cc3dd3677633e6fd6ea5bd7ef3b741fab3 (diff) | |
| download | linux-7a53eea1f7b527fd3b6d7ca992914840981afe99.tar.xz | |
Merge tag 'char-misc-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver updates from Greg KH:
"Here's the "big" char and misc driver update for 4.9-rc1.
Lots of little things here, all over the driver tree for subsystems
that flow through me. Nothing major that I can discern, full details
are in the shortlog.
All have been in the linux-next tree with no reported issues"
* tag 'char-misc-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (144 commits)
drivers/misc/hpilo: Changes to support new security states in iLO5 FW
at25: fix debug and error messaging
misc/genwqe: ensure zero initialization
vme: fake: remove unexpected unlock in fake_master_set()
vme: fake: mark symbols static where possible
spmi: pmic-arb: Return an error code if sanity check fails
Drivers: hv: get rid of id in struct vmbus_channel
Drivers: hv: make VMBus bus ids persistent
mcb: Add a dma_device to mcb_device
mcb: Enable PCI bus mastering by default
mei: stop the stall timer worker if not needed
clk: probe common clock drivers earlier
vme: fake: fix build for 64-bit dma_addr_t
ttyprintk: Neaten and simplify printing
mei: me: add kaby point device ids
coresight: tmc: mark symbols static where possible
coresight: perf: deal with error condition properly
Drivers: hv: hv_util: Avoid dynamic allocation in time synch
fpga manager: Add hardware dependency to Zynq driver
Drivers: hv: utils: Support TimeSync version 4.0 protocol samples.
...
Diffstat (limited to 'drivers/char/mem.c')
| -rw-r--r-- | drivers/char/mem.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/char/mem.c b/drivers/char/mem.c index a33163dbb913..5bb1985ec484 100644 --- a/drivers/char/mem.c +++ b/drivers/char/mem.c @@ -381,6 +381,9 @@ static ssize_t read_kmem(struct file *file, char __user *buf, char *kbuf; /* k-addr because vread() takes vmlist_lock rwlock */ int err = 0; + if (!pfn_valid(PFN_DOWN(p))) + return -EIO; + read = 0; if (p < (unsigned long) high_memory) { low_count = count; @@ -509,6 +512,9 @@ static ssize_t write_kmem(struct file *file, const char __user *buf, char *kbuf; /* k-addr because vwrite() takes vmlist_lock rwlock */ int err = 0; + if (!pfn_valid(PFN_DOWN(p))) + return -EIO; + if (p < (unsigned long) high_memory) { unsigned long to_write = min_t(unsigned long, count, (unsigned long)high_memory - p); |