Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x185/0x1d0 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x87b/0xab0 lib/fault-inject.c:149 should_failslab+0x279/0x2a0 mm/failslab.c:32 ================================================================== BUG: KMSAN: uninit-value in update_stack_state+0x673/0xa40 arch/x86/kernel/unwind_frame.c:222 CPU: 1 PID: 6831 Comm: syz-executor2 Not tainted 4.16.0+ #84 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x14a/0x1d0 lib/dump_stack.c:53 kmsan_report+0x142/0x240 mm/kmsan/kmsan.c:1067 __msan_warning_32+0x6c/0xb0 mm/kmsan/kmsan_instr.c:676 update_stack_state+0x673/0xa40 arch/x86/kernel/unwind_frame.c:222 unwind_next_frame+0x618/0xe50 arch/x86/kernel/unwind_frame.c:329 show_trace_log_lvl+0xb49/0x1030 arch/x86/kernel/dumpstack.c:212 show_stack+0xfc/0x150 arch/x86/kernel/dumpstack.c:236 __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x185/0x1d0 lib/dump_stack.c:53 fail_dump lib/fault-inject.c:51 [inline] should_fail+0x87b/0xab0 lib/fault-inject.c:149 should_failslab+0x279/0x2a0 mm/failslab.c:32 slab_pre_alloc_hook mm/slab.h:422 [inline] slab_alloc_node mm/slub.c:2663 [inline] slab_alloc mm/slub.c:2745 [inline] kmem_cache_alloc+0x136/0xb90 mm/slub.c:2750 getname_flags+0x12a/0xaa0 fs/namei.c:138 user_path_at_empty+0xbb/0x140 fs/namei.c:2569 user_path_at include/linux/namei.h:57 [inline] vfs_statx fs/stat.c:185 [inline] vfs_stat include/linux/fs.h:3075 [inline] SYSC_newstat+0xd4/0x330 fs/stat.c:337 SyS_newstat+0x46/0x70 fs/stat.c:333 do_syscall_64+0x309/0x430 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x3d/0xa2 RIP: 0033:0x455379 RSP: 002b:00007f61bfcffc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 00007f61bfd006d4 RCX: 0000000000455379 RDX: 0000000000000000 RSI: 00000000200002c0 RDI: 0000000020000340 RBP: 000000000072bea0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000014 R13: 0000000000000654 R14: 00000000006fc880 R15: 0000000000000000 Local variable description: ----__wq_entry@expand_files Variable was created at: expand_files+0x5b/0xde0 fs/file.c:196 __alloc_fd+0x480/0xb90 fs/file.c:504 ==================================================================