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BUG: KMSAN: uninit-value in pointer+0x11e5/0x1410 lib/vsprintf.c:1862
CPU: 1 PID: 7932 Comm: syz-executor0 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
 pointer+0x11e5/0x1410 lib/vsprintf.c:1862
 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
 seq_read+0xc7d/0x2260 fs/seq_file.c:240
 __vfs_read+0x1a5/0x9b0 fs/read_write.c:416
 vfs_read+0x36c/0x6c0 fs/read_write.c:452
 ksys_pread64 fs/read_write.c:626 [inline]
 __do_sys_pread64 fs/read_write.c:636 [inline]
 __se_sys_pread64 fs/read_write.c:633 [inline]
 __x64_sys_pread64+0x2f2/0x390 fs/read_write.c:633
 do_syscall_64+0x154/0x220 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x455979
RSP: 002b:00007f91d12c1c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000011
RAX: ffffffffffffffda RBX: 00007f91d12c26d4 RCX: 0000000000455979
RDX: 00000000000000e4 RSI: 0000000020000180 RDI: 0000000000000013
RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000004bc R14: 00000000006fb240 R15: 0000000000000000

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
 seq_read+0xc7d/0x2260 fs/seq_file.c:240
 __vfs_read+0x1a5/0x9b0 fs/read_write.c:416
 vfs_read+0x36c/0x6c0 fs/read_write.c:452
 ksys_pread64 fs/read_write.c:626 [inline]
 __do_sys_pread64 fs/read_write.c:636 [inline]
 __se_sys_pread64 fs/read_write.c:633 [inline]
 __x64_sys_pread64+0x2f2/0x390 fs/read_write.c:633
 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
 seq_read+0xc7d/0x2260 fs/seq_file.c:240
 __vfs_read+0x1a5/0x9b0 fs/read_write.c:416
 vfs_read+0x36c/0x6c0 fs/read_write.c:452
 ksys_pread64 fs/read_write.c:626 [inline]
 __do_sys_pread64 fs/read_write.c:636 [inline]
 __se_sys_pread64 fs/read_write.c:633 [inline]
 __x64_sys_pread64+0x2f2/0x390 fs/read_write.c:633
 do_syscall_64+0x154/0x220 arch/x86/entry/common.c:287
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
Local variable description: ----ug.i@mem_cgroup_uncharge_list
Variable was created at:
 mem_cgroup_uncharge_list+0x42/0x1e0 mm/memcontrol.c:5686
 release_pages+0x1647/0x1670 mm/swap.c:790
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