4.19-stable patches

added patches:
	spmi-trace-fix-stack-out-of-bound-access-in-spmi-tracing-functions.patch

diff --git a/queue-4.19/series b/queue-4.19/series
index 6931184ca7802f10d629ef5a28f5bb3eed06bb2f..0b9cfdbd9b882bdd75860cb52272c33584c99070 100644 (file)
--- a/queue-4.19/series
+++ b/queue-4.19/series
@@ -188,3 +188,4 @@ video-fbdev-arkfb-check-the-size-of-screen-before-me.patch
 video-fbdev-s3fb-check-the-size-of-screen-before-mem.patch
 scsi-zfcp-fix-missing-auto-port-scan-and-thus-missing-target-ports.patch
 x86-olpc-fix-logical-not-is-only-applied-to-the-left-hand-side.patch
+spmi-trace-fix-stack-out-of-bound-access-in-spmi-tracing-functions.patch

diff --git a/queue-4.19/spmi-trace-fix-stack-out-of-bound-access-in-spmi-tracing-functions.patch b/queue-4.19/spmi-trace-fix-stack-out-of-bound-access-in-spmi-tracing-functions.patch
new file mode 100644 (file)
index 0000000..26b6926
--- /dev/null
+++ b/queue-4.19/spmi-trace-fix-stack-out-of-bound-access-in-spmi-tracing-functions.patch
@@ -0,0 +1,110 @@
+From 2af28b241eea816e6f7668d1954f15894b45d7e3 Mon Sep 17 00:00:00 2001
+From: David Collins <quic_collinsd@quicinc.com>
+Date: Mon, 27 Jun 2022 16:55:12 -0700
+Subject: spmi: trace: fix stack-out-of-bound access in SPMI tracing functions
+
+From: David Collins <quic_collinsd@quicinc.com>
+
+commit 2af28b241eea816e6f7668d1954f15894b45d7e3 upstream.
+
+trace_spmi_write_begin() and trace_spmi_read_end() both call
+memcpy() with a length of "len + 1".  This leads to one extra
+byte being read beyond the end of the specified buffer.  Fix
+this out-of-bound memory access by using a length of "len"
+instead.
+
+Here is a KASAN log showing the issue:
+
+BUG: KASAN: stack-out-of-bounds in trace_event_raw_event_spmi_read_end+0x1d0/0x234
+Read of size 2 at addr ffffffc0265b7540 by task thermal@2.0-ser/1314
+...
+Call trace:
+ dump_backtrace+0x0/0x3e8
+ show_stack+0x2c/0x3c
+ dump_stack_lvl+0xdc/0x11c
+ print_address_description+0x74/0x384
+ kasan_report+0x188/0x268
+ kasan_check_range+0x270/0x2b0
+ memcpy+0x90/0xe8
+ trace_event_raw_event_spmi_read_end+0x1d0/0x234
+ spmi_read_cmd+0x294/0x3ac
+ spmi_ext_register_readl+0x84/0x9c
+ regmap_spmi_ext_read+0x144/0x1b0 [regmap_spmi]
+ _regmap_raw_read+0x40c/0x754
+ regmap_raw_read+0x3a0/0x514
+ regmap_bulk_read+0x418/0x494
+ adc5_gen3_poll_wait_hs+0xe8/0x1e0 [qcom_spmi_adc5_gen3]
+ ...
+ __arm64_sys_read+0x4c/0x60
+ invoke_syscall+0x80/0x218
+ el0_svc_common+0xec/0x1c8
+ ...
+
+addr ffffffc0265b7540 is located in stack of task thermal@2.0-ser/1314 at offset 32 in frame:
+ adc5_gen3_poll_wait_hs+0x0/0x1e0 [qcom_spmi_adc5_gen3]
+
+this frame has 1 object:
+ [32, 33) 'status'
+
+Memory state around the buggy address:
+ ffffffc0265b7400: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1
+ ffffffc0265b7480: 04 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
+>ffffffc0265b7500: 00 00 00 00 f1 f1 f1 f1 01 f3 f3 f3 00 00 00 00
+                                           ^
+ ffffffc0265b7580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+ ffffffc0265b7600: f1 f1 f1 f1 01 f2 07 f2 f2 f2 01 f3 00 00 00 00
+==================================================================
+
+Fixes: a9fce374815d ("spmi: add command tracepoints for SPMI")
+Cc: stable@vger.kernel.org
+Reviewed-by: Stephen Boyd <sboyd@kernel.org>
+Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org>
+Signed-off-by: David Collins <quic_collinsd@quicinc.com>
+Link: https://lore.kernel.org/r/20220627235512.2272783-1-quic_collinsd@quicinc.com
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ include/trace/events/spmi.h |   12 ++++++------
+ 1 file changed, 6 insertions(+), 6 deletions(-)
+
+--- a/include/trace/events/spmi.h
++++ b/include/trace/events/spmi.h
+@@ -21,15 +21,15 @@ TRACE_EVENT(spmi_write_begin,
+               __field         ( u8,         sid       )
+               __field         ( u16,        addr      )
+               __field         ( u8,         len       )
+-              __dynamic_array ( u8,   buf,  len + 1   )
++              __dynamic_array ( u8,   buf,  len       )
+       ),
+ 
+       TP_fast_assign(
+               __entry->opcode = opcode;
+               __entry->sid    = sid;
+               __entry->addr   = addr;
+-              __entry->len    = len + 1;
+-              memcpy(__get_dynamic_array(buf), buf, len + 1);
++              __entry->len    = len;
++              memcpy(__get_dynamic_array(buf), buf, len);
+       ),
+ 
+       TP_printk("opc=%d sid=%02d addr=0x%04x len=%d buf=0x[%*phD]",
+@@ -92,7 +92,7 @@ TRACE_EVENT(spmi_read_end,
+               __field         ( u16,        addr      )
+               __field         ( int,        ret       )
+               __field         ( u8,         len       )
+-              __dynamic_array ( u8,   buf,  len + 1   )
++              __dynamic_array ( u8,   buf,  len       )
+       ),
+ 
+       TP_fast_assign(
+@@ -100,8 +100,8 @@ TRACE_EVENT(spmi_read_end,
+               __entry->sid    = sid;
+               __entry->addr   = addr;
+               __entry->ret    = ret;
+-              __entry->len    = len + 1;
+-              memcpy(__get_dynamic_array(buf), buf, len + 1);
++              __entry->len    = len;
++              memcpy(__get_dynamic_array(buf), buf, len);
+       ),
+ 
+       TP_printk("opc=%d sid=%02d addr=0x%04x ret=%d len=%02d buf=0x[%*phD]",