================================================================== BUG: KASAN: stack-out-of-bounds in unwind_get_return_address+0x96/0xa0 arch/x86/kernel/unwind_frame.c:17 Read of size 8 at addr ffff8801ce32fa68 by task syz-executor602/2411 CPU: 1 PID: 2411 Comm: syz-executor602 Not tainted 4.9.153+ #18 ffff8801cda177e8 ffffffff81b47491 0000000000000000 ffffea000738cbc0 ffff8801ce32fa68 0000000000000008 ffffffff810ab576 ffff8801cda17820 ffffffff81502615 0000000000000000 ffff8801ce32fa68 ffff8801ce32fa68 Call Trace: [] __dump_stack lib/dump_stack.c:15 [inline] [] dump_stack+0xc1/0x120 lib/dump_stack.c:51 [] print_address_description+0x6f/0x238 mm/kasan/report.c:256 [] kasan_report_error mm/kasan/report.c:355 [inline] [] kasan_report mm/kasan/report.c:412 [inline] [] kasan_report.cold+0x8c/0x2ba mm/kasan/report.c:397 [] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 [] unwind_get_return_address+0x96/0xa0 arch/x86/kernel/unwind_frame.c:17 [] __save_stack_trace+0x8a/0xf0 arch/x86/kernel/stacktrace.c:43 [] save_stack_trace_tsk arch/x86/kernel/stacktrace.c:71 [inline] [] save_stack_trace_tsk+0x42/0x60 arch/x86/kernel/stacktrace.c:66 [] proc_pid_stack+0x1a2/0x290 fs/proc/base.c:483 [] proc_single_show+0xf6/0x160 fs/proc/base.c:785 [] seq_read+0x4cd/0x1250 fs/seq_file.c:240 [] do_loop_readv_writev.part.0+0xcc/0x2c0 fs/read_write.c:718 [] do_loop_readv_writev fs/read_write.c:707 [inline] [] do_readv_writev+0x556/0x7a0 fs/read_write.c:873 [] vfs_readv+0x86/0xc0 fs/read_write.c:897 [] do_preadv+0x19b/0x240 fs/read_write.c:974 [] SYSC_preadv fs/read_write.c:1024 [inline] [] SyS_preadv+0x31/0x40 fs/read_write.c:1019 [] do_syscall_64+0x1ad/0x570 arch/x86/entry/common.c:285 [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb The buggy address belongs to the page: page:ffffea000738cbc0 count:0 mapcount:0 mapping: (null) index:0x0 flags: 0x4000000000000000() page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801ce32f900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801ce32f980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff8801ce32fa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff8801ce32fa80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff8801ce32fb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================