netlink: 20 bytes leftover after parsing attributes in process `syz-executor2'.
netlink: 20 bytes leftover after parsing attributes in process `syz-executor2'.
==================================================================
BUG: KMSAN: uninit-value in is_kernel include/linux/kallsyms.h:41 [inline]
BUG: KMSAN: uninit-value in is_ksym_addr include/linux/kallsyms.h:49 [inline]
BUG: KMSAN: uninit-value in kallsyms_lookup+0x152/0x910 kernel/kallsyms.c:288
CPU: 0 PID: 8671 Comm: syz-executor5 Not tainted 4.17.0-rc3+ #88
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x185/0x1d0 lib/dump_stack.c:113
 kmsan_report+0x142/0x240 mm/kmsan/kmsan.c:1067
 __msan_warning_32+0x6c/0xb0 mm/kmsan/kmsan_instr.c:683
 is_kernel include/linux/kallsyms.h:41 [inline]
 is_ksym_addr include/linux/kallsyms.h:49 [inline]
 kallsyms_lookup+0x152/0x910 kernel/kallsyms.c:288
 __sprint_symbol+0x147/0x5b0 kernel/kallsyms.c:361
 sprint_backtrace+0x7f/0x90 kernel/kallsyms.c:429
 symbol_string+0x19f/0x230 lib/vsprintf.c:694
 pointer+0xdb9/0x1410 lib/vsprintf.c:1880
 vsnprintf+0xa2d/0x33c0 lib/vsprintf.c:2296
 seq_vprintf fs/seq_file.c:403 [inline]
 seq_printf+0x29f/0x420 fs/seq_file.c:418
 proc_pid_stack+0x326/0x470 fs/proc/base.c:449
 proc_single_show+0x1af/0x300 fs/proc/base.c:747
 traverse+0x3c4/0xe60 fs/seq_file.c:114
 seq_lseek+0x30c/0x5c0 fs/seq_file.c:337
 vfs_llseek fs/read_write.c:300 [inline]
 ksys_lseek fs/read_write.c:313 [inline]
 __do_sys_lseek fs/read_write.c:324 [inline]
 __se_sys_lseek fs/read_write.c:322 [inline]
 __x64_sys_lseek+0x22b/0x3a0 fs/read_write.c:322
 do_syscall_64+0x154/0x220 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x455979
RSP: 002b:00007f20024e3c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000008
RAX: ffffffffffffffda RBX: 00007f20024e46d4 RCX: 0000000000455979
RDX: 0000000000000000 RSI: 7ffffffffffffffb RDI: 0000000000000015
RBP: 000000000072bf50 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 0000000000000427 R14: 00000000006fa448 R15: 0000000000000001

Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:278 [inline]
 kmsan_save_stack mm/kmsan/kmsan.c:293 [inline]
 kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:684
 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:528
 save_stack_address arch/x86/kernel/stacktrace.c:29 [inline]
 __save_stack_trace+0x829/0xb00 arch/x86/kernel/stacktrace.c:50
 save_stack_trace_tsk+0x258/0x2f0 arch/x86/kernel/stacktrace.c:82
 proc_pid_stack+0x26a/0x470 fs/proc/base.c:446
 proc_single_show+0x1af/0x300 fs/proc/base.c:747
 traverse+0x3c4/0xe60 fs/seq_file.c:114
 seq_lseek+0x30c/0x5c0 fs/seq_file.c:337
 vfs_llseek fs/read_write.c:300 [inline]
 ksys_lseek fs/read_write.c:313 [inline]
 __do_sys_lseek fs/read_write.c:324 [inline]
 __se_sys_lseek fs/read_write.c:322 [inline]
 __x64_sys_lseek+0x22b/0x3a0 fs/read_write.c:322
 do_syscall_64+0x154/0x220 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
Uninit was stored to memory at:
 kmsan_save_stack_with_flags mm/kmsan/kmsan.c:278 [inline]
 kmsan_save_stack mm/kmsan/kmsan.c:293 [inline]
 kmsan_internal_chain_origin+0x12b/0x210 mm/kmsan/kmsan.c:684
 __msan_chain_origin+0x69/0xc0 mm/kmsan/kmsan_instr.c:528
 update_stack_state+0x959/0xa40 arch/x86/kernel/unwind_frame.c:257
 unwind_next_frame+0x618/0xe50 arch/x86/kernel/unwind_frame.c:329
 __save_stack_trace+0x734/0xb00 arch/x86/kernel/stacktrace.c:48
 save_stack_trace_tsk+0x258/0x2f0 arch/x86/kernel/stacktrace.c:82
 proc_pid_stack+0x26a/0x470 fs/proc/base.c:446
 proc_single_show+0x1af/0x300 fs/proc/base.c:747
 traverse+0x3c4/0xe60 fs/seq_file.c:114
 seq_lseek+0x30c/0x5c0 fs/seq_file.c:337
 vfs_llseek fs/read_write.c:300 [inline]
 ksys_lseek fs/read_write.c:313 [inline]
 __do_sys_lseek fs/read_write.c:324 [inline]
 __se_sys_lseek fs/read_write.c:322 [inline]
 __x64_sys_lseek+0x22b/0x3a0 fs/read_write.c:322
 do_syscall_64+0x154/0x220 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
Local variable description: ----c.i.i.i.i@__block_write_begin_int
Variable was created at:
 __block_write_begin_int+0xe8/0x2910 fs/buffer.c:1929
 __block_write_begin fs/buffer.c:2013 [inline]
 block_page_mkwrite+0x495/0x980 fs/buffer.c:2476
==================================================================