================================================================== BUG: KASAN: stack-out-of-bounds in unwind_get_return_address+0x92/0xa0 arch/x86/kernel/unwind_frame.c:17 Read of size 8 at addr ffff8801c7eb7e50 by task syz-executor6/11724 CPU: 1 PID: 11724 Comm: syz-executor6 Not tainted 4.9.74-g173c52e #4 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801ce16f940 ffffffff81d91b09 ffffea00071fadc0 ffff8801c7eb7e50 0000000000000000 ffff8801c7eb7e50 0000000000000000 ffff8801ce16f978 ffffffff8153b503 ffff8801c7eb7e50 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_get_return_address+0x92/0xa0 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+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 [] __vfs_read+0x103/0x670 fs/read_write.c:452 [] vfs_read+0x11e/0x380 fs/read_write.c:475 [] SYSC_read fs/read_write.c:591 [inline] [] SyS_read+0xd9/0x1b0 fs/read_write.c:584 [] entry_SYSCALL_64_fastpath+0x23/0xc6 The buggy address belongs to the page: page:ffffea00071fadc0 count:0 mapcount:0 mapping: (null) index:0x0 flags: 0x8000000000000000() page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801c7eb7d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801c7eb7d80: 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 >ffff8801c7eb7e00: f1 00 f2 f2 f2 f2 f2 f2 f2 00 f2 f2 f2 f2 f2 f2 ^ ffff8801c7eb7e80: f2 00 00 f2 f2 00 00 00 00 00 00 00 00 00 00 00 ffff8801c7eb7f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 11724 Comm: syz-executor6 Tainted: G B 4.9.74-g173c52e #4 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801ce16f898 ffffffff81d91b09 ffffffff841955df ffff8801ce16f970 0000000000000000 ffff8801c7eb7e50 0000000000000000 ffff8801ce16f960 ffffffff8142d161 0000000041b58ab3 ffffffff84189020 ffffffff8142cfa5 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] panic+0x1bc/0x3a8 kernel/panic.c:179 [] kasan_end_report+0x50/0x50 mm/kasan/report.c:176 [] kasan_report_error mm/kasan/report.c:356 [inline] [] kasan_report+0x167/0x360 mm/kasan/report.c:408 [] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:429 [] unwind_get_return_address+0x92/0xa0 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+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 [] __vfs_read+0x103/0x670 fs/read_write.c:452 [] vfs_read+0x11e/0x380 fs/read_write.c:475 [] SYSC_read fs/read_write.c:591 [inline] [] SyS_read+0xd9/0x1b0 fs/read_write.c:584 [] entry_SYSCALL_64_fastpath+0x23/0xc6 Dumping ftrace buffer: (ftrace buffer empty) Kernel Offset: disabled Rebooting in 86400 seconds..