==================================================================
BUG: KASAN: stack-out-of-bounds in get_frame_pointer arch/x86/include/asm/stacktrace.h:64 [inline] at addr ffff8801c53a7d28
BUG: KASAN: stack-out-of-bounds in __unwind_start+0x3a7/0x3c0 arch/x86/kernel/unwind_frame.c:76 at addr ffff8801c53a7d28
Read of size 8 by task syz-executor4/20388
page:ffffea000714e9c0 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0x8000000000000000()
page dumped because: kasan: bad access detected
CPU: 1 PID: 20388 Comm: syz-executor4 Not tainted 4.9.67-gf26d3c7 #106
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d07f7810 ffffffff81d906e9 ffffed0038a74fa5 0000000000000008
 0000000000000000 ffffed0038a74fa5 ffff8801c53a7d28 ffff8801d07f7898
 ffffffff8153a833 ffff8801d5bf8000 ffffffff8389f09e ffffffff810d41b7
Call Trace:
 [<ffffffff81d906e9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d906e9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8153a833>] print_address_description mm/kasan/report.c:208 [inline]
 [<ffffffff8153a833>] kasan_report_error mm/kasan/report.c:287 [inline]
 [<ffffffff8153a833>] kasan_report.part.1+0x4c3/0x500 mm/kasan/report.c:309
 [<ffffffff8153a929>] kasan_report mm/kasan/report.c:330 [inline]
 [<ffffffff8153a929>] __asan_report_load8_noabort+0x29/0x30 mm/kasan/report.c:330
 [<ffffffff810d41b7>] get_frame_pointer arch/x86/include/asm/stacktrace.h:64 [inline]
 [<ffffffff810d41b7>] __unwind_start+0x3a7/0x3c0 arch/x86/kernel/unwind_frame.c:76
 [<ffffffff8107c499>] unwind_start arch/x86/include/asm/unwind.h:39 [inline]
 [<ffffffff8107c499>] __save_stack_trace+0x59/0xf0 arch/x86/kernel/stacktrace.c:41
 [<ffffffff8107c598>] save_stack_trace_tsk+0x48/0x70 arch/x86/kernel/stacktrace.c:71
 [<ffffffff816c15d6>] proc_pid_stack+0x146/0x230 fs/proc/base.c:466
 [<ffffffff816c2da8>] proc_single_show+0xf8/0x170 fs/proc/base.c:768
 [<ffffffff815e1b21>] traverse+0x231/0x900 fs/seq_file.c:124
 [<ffffffff815e53ea>] seq_read+0x7ea/0x1290 fs/seq_file.c:195
 [<ffffffff815680d3>] __vfs_read+0x103/0x670 fs/read_write.c:452
 [<ffffffff8156be6e>] vfs_read+0x11e/0x380 fs/read_write.c:475
 [<ffffffff8156ff5f>] SYSC_pread64 fs/read_write.c:629 [inline]
 [<ffffffff8156ff5f>] SyS_pread64+0x13f/0x170 fs/read_write.c:616
 [<ffffffff838a9985>] entry_SYSCALL_64_fastpath+0x23/0xc6
Memory state around the buggy address:
 ffff8801c53a7c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801c53a7c80: 00 00 00 00 00 00 f1 f1 f1 f1 04 f2 f2 f2 f2 f2
>ffff8801c53a7d00: f2 f2 04 f2 f2 f2 f2 f2 f2 f2 00 00 f2 f2 f2 f2
                                  ^
 ffff8801c53a7d80: f2 f2 00 00 00 f2 f2 f2 f2 f2 00 00 00 f2 00 00
 ffff8801c53a7e00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
==================================================================
BUG: KASAN: stack-out-of-bounds in unwind_get_return_address+0x92/0xa0 arch/x86/kernel/unwind_frame.c:17 at addr ffff8801c53a7de8
Read of size 8 by task syz-executor4/20388
page:ffffea000714e9c0 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0x8000000000000000()
page dumped because: kasan: bad access detected
CPU: 1 PID: 20388 Comm: syz-executor4 Tainted: G    B           4.9.67-gf26d3c7 #106
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d07f7860 ffffffff81d906e9 ffffed0038a74fbd 0000000000000008
 0000000000000000 ffffed0038a74fbd ffff8801c53a7de8 ffff8801d07f78e8
 ffffffff8153a833 ffff8801c53a7d00 ffff8801d07f7928 ffffffff810d3bd2
Call Trace:
 [<ffffffff81d906e9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d906e9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8153a833>] print_address_description mm/kasan/report.c:208 [inline]
 [<ffffffff8153a833>] kasan_report_error mm/kasan/report.c:287 [inline]
 [<ffffffff8153a833>] kasan_report.part.1+0x4c3/0x500 mm/kasan/report.c:309
 [<ffffffff8153a929>] kasan_report mm/kasan/report.c:330 [inline]
 [<ffffffff8153a929>] __asan_report_load8_noabort+0x29/0x30 mm/kasan/report.c:330
 [<ffffffff810d3bd2>] unwind_get_return_address+0x92/0xa0 arch/x86/kernel/unwind_frame.c:17
 [<ffffffff8107c4cd>] __save_stack_trace+0x8d/0xf0 arch/x86/kernel/stacktrace.c:43
 [<ffffffff8107c598>] save_stack_trace_tsk+0x48/0x70 arch/x86/kernel/stacktrace.c:71
 [<ffffffff816c15d6>] proc_pid_stack+0x146/0x230 fs/proc/base.c:466
 [<ffffffff816c2da8>] proc_single_show+0xf8/0x170 fs/proc/base.c:768
 [<ffffffff815e1b21>] traverse+0x231/0x900 fs/seq_file.c:124
 [<ffffffff815e53ea>] seq_read+0x7ea/0x1290 fs/seq_file.c:195
 [<ffffffff815680d3>] __vfs_read+0x103/0x670 fs/read_write.c:452
 [<ffffffff8156be6e>] vfs_read+0x11e/0x380 fs/read_write.c:475
 [<ffffffff8156ff5f>] SYSC_pread64 fs/read_write.c:629 [inline]
 [<ffffffff8156ff5f>] SyS_pread64+0x13f/0x170 fs/read_write.c:616
 [<ffffffff838a9985>] entry_SYSCALL_64_fastpath+0x23/0xc6
Memory state around the buggy address:
 ffff8801c53a7c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801c53a7d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8801c53a7d80: 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1
                                                          ^
 ffff8801c53a7e00: f1 00 f2 f2 f2 f2 f2 f2 f2 00 f2 f2 f2 f2 f2 f2
 ffff8801c53a7e80: f2 00 00 f2 f2 00 00 00 00 00 00 00 00 00 00 00
==================================================================
==================================================================
BUG: KASAN: out-of-bounds in get_frame_pointer arch/x86/include/asm/stacktrace.h:64 [inline] at addr ffff8801ce7ef8c8
BUG: KASAN: out-of-bounds in __unwind_start+0x3a7/0x3c0 arch/x86/kernel/unwind_frame.c:76 at addr ffff8801ce7ef8c8
Read of size 8 by task syz-executor7/22846
page:ffffea000739fbc0 count:0 mapcount:0 mapping:          (null) index:0x0
flags: 0x8000000000000000()
page dumped because: kasan: bad access detected
CPU: 1 PID: 22846 Comm: syz-executor7 Tainted: G    B           4.9.67-gf26d3c7 #106
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
 ffff8801d00b7810 ffffffff81d906e9 ffffed0039cfdf1a 0000000000000008
 0000000000000000 ffffed0039cfdf1a ffff8801ce7ef8c8 ffff8801d00b7898
 ffffffff8153a833 0000000000000000 0000000000000000 ffffffff810d41b7
Call Trace:
 [<ffffffff81d906e9>] __dump_stack lib/dump_stack.c:15 [inline]
 [<ffffffff81d906e9>] dump_stack+0xc1/0x128 lib/dump_stack.c:51
 [<ffffffff8153a833>] print_address_description mm/kasan/report.c:208 [inline]
 [<ffffffff8153a833>] kasan_report_error mm/kasan/report.c:287 [inline]
 [<ffffffff8153a833>] kasan_report.part.1+0x4c3/0x500 mm/kasan/report.c:309
 [<ffffffff8153a929>] kasan_report mm/kasan/report.c:330 [inline]
 [<ffffffff8153a929>] __asan_report_load8_noabort+0x29/0x30 mm/kasan/report.c:330
 [<ffffffff810d41b7>] get_frame_pointer arch/x86/include/asm/stacktrace.h:64 [inline]
 [<ffffffff810d41b7>] __unwind_start+0x3a7/0x3c0 arch/x86/kernel/unwind_frame.c:76
 [<ffffffff8107c499>] unwind_start arch/x86/include/asm/unwind.h:39 [inline]
 [<ffffffff8107c499>] __save_stack_trace+0x59/0xf0 arch/x86/kernel/stacktrace.c:41
 [<ffffffff8107c598>] save_stack_trace_tsk+0x48/0x70 arch/x86/kernel/stacktrace.c:71
 [<ffffffff816c15d6>] proc_pid_stack+0x146/0x230 fs/proc/base.c:466
 [<ffffffff816c2da8>] proc_single_show+0xf8/0x170 fs/proc/base.c:768
 [<ffffffff815e1b21>] traverse+0x231/0x900 fs/seq_file.c:124
 [<ffffffff815e53ea>] seq_read+0x7ea/0x1290 fs/seq_file.c:195
 [<ffffffff815680d3>] __vfs_read+0x103/0x670 fs/read_write.c:452
 [<ffffffff8156be6e>] vfs_read+0x11e/0x380 fs/read_write.c:475
 [<ffffffff8156ff5f>] SYSC_pread64 fs/read_write.c:629 [inline]
 [<ffffffff8156ff5f>] SyS_pread64+0x13f/0x170 fs/read_write.c:616
 [<ffffffff838a9985>] entry_SYSCALL_64_fastpath+0x23/0xc6
Memory state around the buggy address:
 ffff8801ce7ef780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8801ce7ef800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8801ce7ef880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
                                                 ^
 ffff8801ce7ef900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f1
 ffff8801ce7ef980: f1 f1 f1 00 f2 f2 f2 f3 f3 f3 f3 00 00 00 00 00
==================================================================