Subash Abhinov Kasiviswanathan e7d316a02f sysctl: handle error writing UINT_MAX to u32 fields ... We have scripts which write to certain fields on 3.18 kernels but this seems to be failing on 4.4 kernels. An entry which we write to here is xfrm_aevent_rseqth which is u32. echo 4294967295 > /proc/sys/net/core/xfrm_aevent_rseqth Commit 230633d109 ("kernel/sysctl.c: detect overflows when converting to int") prevented writing to sysctl entries when integer overflow occurs. However, this does not apply to unsigned integers. Heinrich suggested that we introduce a new option to handle 64 bit limits and set min as 0 and max as UINT_MAX. This might not work as it leads to issues similar to __do_proc_doulongvec_minmax. Alternatively, we would need to change the datatype of the entry to 64 bit. static int __do_proc_doulongvec_minmax(void *data, struct ctl_table { i = (unsigned long *) data; //This cast is causing to read beyond the size of data (u32) vleft = table->maxlen / sizeof(unsigned long); //vleft is 0 because maxlen is sizeof(u32) which is lesser than sizeof(unsigned long) on x86_64. Introduce a new proc handler proc_douintvec. Individual proc entries will need to be updated to use the new handler. [akpm@linux-foundation.org: coding-style fixes] Fixes: 230633d109 ("kernel/sysctl.c:detect overflows when converting to int") Link: http://lkml.kernel.org/r/1471479806-5252-1-git-send-email-subashab@codeaurora.org Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org> Cc: Heinrich Schuchardt <xypron.glpk@gmx.de> Cc: Kees Cook <keescook@chromium.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Ingo Molnar <mingo@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2016-08-26 17:39:35 -07:00
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acpi
asm-generic	locking/qrwlock: Fix write unlock bug on big endian systems	2016-08-10 14:13:27 +02:00
clocksource
crypto
drm
dt-bindings
keys
kvm
linux	sysctl: handle error writing UINT_MAX to u32 fields	2016-08-26 17:39:35 -07:00
math-emu
media
memory
misc
net	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-08-17 17:26:58 -07:00
pcmcia
ras
rdma
rxrpc
scsi
soc
sound
target
trace	Luiz Capitulino noticed that the tick_stop tracepoint wasn't being parsed	2016-08-09 10:34:09 -07:00
uapi	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-08-17 17:26:58 -07:00
video
xen	xen: change the type of xen_vcpu_id to uint32_t	2016-08-24 18:17:27 +01:00
Kbuild