================================================================== BUG: KASAN: out-of-bounds in unwind_get_return_address+0x98/0xb0 arch/x86/kernel/unwind_frame.c:17 Read of size 8 at addr ffff8801a04278e8 by task syz-executor5/12829 CPU: 1 PID: 12829 Comm: syz-executor5 Not tainted 4.9.113-g9905591 #66 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801a07bf8e0 ffffffff81eb32a9 ffffea00068109c0 ffff8801a04278e8 0000000000000000 ffff8801a04278f0 ffff8801ba068a00 ffff8801a07bf918 ffffffff81567bd9 ffff8801a04278e8 0000000000000008 0000000000000000 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] print_address_description+0x6c/0x234 mm/kasan/report.c:256 [] kasan_report_error mm/kasan/report.c:355 [inline] [] kasan_report.cold.6+0x242/0x2fe mm/kasan/report.c:412 [] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 [] unwind_get_return_address+0x98/0xb0 arch/x86/kernel/unwind_frame.c:17 [] __save_stack_trace+0x8d/0xf0 arch/x86/kernel/stacktrace.c:43 [] save_stack_trace_tsk+0x48/0x70 arch/x86/kernel/stacktrace.c:71 [] proc_pid_stack+0x148/0x220 fs/proc/base.c:469 [] proc_single_show+0xfd/0x170 fs/proc/base.c:771 [] seq_read+0x4b6/0x12e0 fs/seq_file.c:240 [] __vfs_read+0x115/0x570 fs/read_write.c:449 [] vfs_read+0x120/0x380 fs/read_write.c:472 [] SYSC_read fs/read_write.c:588 [inline] [] SyS_read+0xd9/0x1c0 fs/read_write.c:581 [] do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282 [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb The buggy address belongs to the page: page:ffffea00068109c0 count:0 mapcount:0 mapping: (null) index:0x0 flags: 0x8000000000000000() page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801a0427780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801a0427800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8801a0427880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff8801a0427900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801a0427980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================