================================================================== BUG: KASAN: out-of-bounds in unwind_next_frame+0xd7/0xe0 arch/x86/kernel/unwind_frame.c:51 Read of size 8 at addr ffff8801acdbf900 by task syz-executor1/5417 CPU: 0 PID: 5417 Comm: syz-executor1 Not tainted 4.9.83-ga92bb8d #43 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801acc377c8 ffffffff81d95149 ffffea0006b36fc0 ffff8801acdbf900 0000000000000000 ffff8801acdbf908 0000000000000000 ffff8801acc37800 ffffffff8153e213 ffff8801acdbf900 0000000000000008 0000000000000000 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] print_address_description+0x73/0x280 mm/kasan/report.c:252 [] kasan_report_error mm/kasan/report.c:351 [inline] [] kasan_report+0x275/0x360 mm/kasan/report.c:408 [] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:429 [] unwind_next_frame+0xd7/0xe0 arch/x86/kernel/unwind_frame.c:51 [] __save_stack_trace+0x7d/0xf0 arch/x86/kernel/stacktrace.c:42 [] save_stack_trace_tsk+0x48/0x70 arch/x86/kernel/stacktrace.c:71 [] proc_pid_stack+0x146/0x230 fs/proc/base.c:466 [] proc_single_show+0xf8/0x170 fs/proc/base.c:768 [] seq_read+0x32f/0x1290 fs/seq_file.c:240 [] do_loop_readv_writev.part.17+0x141/0x1e0 fs/read_write.c:714 [] do_loop_readv_writev fs/read_write.c:880 [inline] [] do_readv_writev+0x520/0x750 fs/read_write.c:874 [] vfs_readv+0x84/0xc0 fs/read_write.c:898 [] do_readv+0xe6/0x250 fs/read_write.c:924 [] SYSC_readv fs/read_write.c:1011 [inline] [] SyS_readv+0x27/0x30 fs/read_write.c:1008 [] do_syscall_64+0x1a4/0x490 arch/x86/entry/common.c:282 [] entry_SYSCALL_64_after_swapgs+0x47/0xc5 The buggy address belongs to the page: page:ffffea0006b36fc0 count:0 mapcount:0 mapping: (null) index:0x0 flags: 0x8000000000000000() page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801acdbf800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801acdbf880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8801acdbf900: 00 00 00 00 f1 f1 f1 f1 00 f2 f2 f2 f3 f3 f3 f3 ^ ffff8801acdbf980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 ffff8801acdbfa00: f1 f1 f1 00 f2 f2 f2 f2 f2 f2 f2 00 00 00 00 00 ==================================================================