================================================================== BUG: KASAN: out-of-bounds in get_frame_pointer arch/x86/include/asm/stacktrace.h:64 [inline] BUG: KASAN: out-of-bounds in __unwind_start+0x3a7/0x3c0 arch/x86/kernel/unwind_frame.c:76 Read of size 8 at addr ffff8801cd6cfc30 by task syz-executor2/10025 CPU: 0 PID: 10025 Comm: syz-executor2 Not tainted 4.9.71-g2506378 #113 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801cc8778f0 ffffffff81d922b9 ffffea000735b3c0 ffff8801cd6cfc30 0000000000000000 ffff8801cd6cfc38 ffff8801cc877a20 ffff8801cc877928 ffffffff8153bab3 ffff8801cd6cfc30 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 [] get_frame_pointer arch/x86/include/asm/stacktrace.h:64 [inline] [] __unwind_start+0x3a7/0x3c0 arch/x86/kernel/unwind_frame.c:76 [] unwind_start arch/x86/include/asm/unwind.h:39 [inline] [] __save_stack_trace+0x59/0xf0 arch/x86/kernel/stacktrace.c:41 [] 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:ffffea000735b3c0 count:0 mapcount:0 mapping: (null) index:0x0 flags: 0x8000000000000000() page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801cd6cfb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801cd6cfb80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8801cd6cfc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff8801cd6cfc80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801cd6cfd00: 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: 0 PID: 10025 Comm: syz-executor2 Tainted: G B 4.9.71-g2506378 #113 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801cc877848 ffffffff81d922b9 ffffffff84194b3f ffff8801cc877920 0000000000000000 ffff8801cd6cfc38 ffff8801cc877a20 ffff8801cc877910 ffffffff8142d741 0000000041b58ab3 ffffffff84188580 ffffffff8142d585 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 [] get_frame_pointer arch/x86/include/asm/stacktrace.h:64 [inline] [] __unwind_start+0x3a7/0x3c0 arch/x86/kernel/unwind_frame.c:76 [] unwind_start arch/x86/include/asm/unwind.h:39 [inline] [] __save_stack_trace+0x59/0xf0 arch/x86/kernel/stacktrace.c:41 [] 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..