================================================================== BUG: KASAN: stack-out-of-bounds in unwind_get_return_address+0x8f/0xa0 arch/x86/kernel/unwind_frame.c:17 Read of size 8 at addr ffff8801addb7de8 by task syz-executor5/21080 CPU: 0 PID: 21080 Comm: syz-executor5 Not tainted 4.9.130+ #2 ffff8801d2dff7c8 ffffffff81b36c99 ffffea0006b76dc0 ffff8801addb7de8 0000000000000000 ffff8801addb7de8 ffff8801c977b280 ffff8801d2dff800 ffffffff8150080d ffff8801addb7de8 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+0x8f/0xa0 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+0x4b6/0x12d0 fs/seq_file.c:240 [] do_loop_readv_writev.part.1+0xd5/0x280 fs/read_write.c:718 [] do_loop_readv_writev fs/read_write.c:707 [inline] [] compat_do_readv_writev+0x570/0x7b0 fs/read_write.c:1091 [] compat_readv+0xe2/0x150 fs/read_write.c:1120 [] do_compat_preadv64+0x152/0x180 fs/read_write.c:1169 [] C_SYSC_preadv fs/read_write.c:1189 [inline] [] compat_SyS_preadv+0x3b/0x50 fs/read_write.c:1183 [] do_syscall_32_irqs_on arch/x86/entry/common.c:328 [inline] [] do_fast_syscall_32+0x2f1/0xa10 arch/x86/entry/common.c:390 [] entry_SYSENTER_compat+0x90/0xa2 arch/x86/entry/entry_64_compat.S:137 The buggy address belongs to the page: page:ffffea0006b76dc0 count:0 mapcount:0 mapping: (null) index:0x0 flags: 0x4000000000000000() page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801addb7c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801addb7d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8801addb7d80: f1 f1 f1 f1 00 f2 f2 f2 f2 f2 f2 f2 00 f2 f2 f2 ^ ffff8801addb7e00: f2 f2 f2 f2 00 00 f2 f2 00 00 00 00 00 00 00 00 ffff8801addb7e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================