================================================================== BUG: KASAN: stack-out-of-bounds in unwind_get_return_address+0x98/0xb0 arch/x86/kernel/unwind_frame.c:17 Read of size 8 at addr ffff8801d4707df8 by task syz-executor1/11688 CPU: 0 PID: 11688 Comm: syz-executor1 Not tainted 4.9.96-g320d53a #10 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801c31b77c8 ffffffff81eb0b69 ffffea000751c1c0 ffff8801d4707df8 0000000000000000 ffff8801d4707df8 ffff8801c690da00 ffff8801c31b7800 ffffffff8156540b ffff8801d4707df8 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:467 [] proc_single_show+0xfd/0x170 fs/proc/base.c:769 [] seq_read+0x4b6/0x12e0 fs/seq_file.c:240 [] do_loop_readv_writev.part.18+0xd5/0x280 fs/read_write.c:718 [] do_loop_readv_writev fs/read_write.c:707 [inline] [] do_readv_writev+0x565/0x7a0 fs/read_write.c:873 [] vfs_readv+0x84/0xc0 fs/read_write.c:897 [] do_readv+0xe6/0x260 fs/read_write.c:923 [] SYSC_readv fs/read_write.c:1010 [inline] [] SyS_readv+0x27/0x30 fs/read_write.c:1007 [] 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:ffffea000751c1c0 count:0 mapcount:0 mapping: (null) index:0x0 flags: 0x8000000000000000() page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801d4707c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801d4707d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8801d4707d80: 00 00 f1 f1 f1 f1 00 f2 f2 f2 f2 f2 f2 f2 00 f2 ^ ffff8801d4707e00: f2 f2 f2 f2 f2 f2 00 00 f2 f2 00 00 00 00 00 00 ffff8801d4707e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================